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a369299c3f
52408 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Masami Hiramatsu (Google)
|
a369299c3f |
tracing/probes: Make the $ prefix mandatory for comm access
Since $comm or $COMM are not event field but special fetcharg
variables to access current->comm, It should not be accessed
without '$' prefix even with typecast.
Link: https://lore.kernel.org/all/178231209724.732967.12049805699091810641.stgit@devnote2/
Fixes:
|
||
|
Sechang Lim
|
367c49d6e2 |
tracing/fprobe: Fix NULL pointer dereference in fprobe_fgraph_entry()
fprobe_fgraph_entry() sizes a shadow-stack reservation in one walk of
the per-ip fprobe list and fills it in a second walk, both under
rcu_read_lock() only. A fprobe registered on an already-live ip can
become visible between the two walks, so the fill walk processes an
exit_handler the sizing walk did not count and used runs past
reserved_words. If the sizing walk counted nothing, fgraph_data is NULL
and the first write_fprobe_header() faults:
Oops: general protection fault, probably for non-canonical address ...
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
RIP: 0010:fprobe_fgraph_entry+0xa38/0xf10 kernel/trace/fprobe.c:167
Call Trace:
<TASK>
function_graph_enter_regs+0x44c/0xa10 kernel/trace/fgraph.c:677
ftrace_graph_func+0xc5/0x140 arch/x86/kernel/ftrace.c:671
__kernel_text_address+0x9/0x40 kernel/extable.c:78
arch_stack_walk+0x117/0x170 arch/x86/kernel/stacktrace.c:26
kmem_cache_free+0x188/0x580 mm/slub.c:6378
tcp_data_queue+0x18d/0x6550 net/ipv4/tcp_input.c:5590
[...]
</TASK>
The list cannot be frozen across the two walks, so skip a node that does
not fit the reservation and count it as missed.
Link: https://lore.kernel.org/all/20260619184425.3824774-1-rhkrqnwk98@gmail.com/
Fixes:
|
||
|
Masami Hiramatsu (Google)
|
9a667b7750 |
tracing/probes: Fix double addition of offset for @+FOFFSET
Since commit |
||
|
Martin Kaiser
|
206b25c090 |
tracing: eprobe: read the complete FILTER_PTR_STRING pointer
For a char * element in an event, the FILTER_PTR_STRING filter type is
used. When the event occurs, a pointer is stored in the ringbuffer.
If an eprobe references such a char * element of a "base event", the
stored pointer is truncated when it's read from the ringbuffer.
$ cd /sys/kernel/tracing
$ echo 'e rcu.rcu_utilization $s:x64 $s:string' > dynamic_events
$ echo 1 > tracing_on
$ echo 1 > events/eprobes/enable
$ sleep 1
$ echo 0 > events/eprobes/enable
$ cat trace
<idle>-0 ...: (rcu.rcu_utilization) arg1=0x4f arg2=(fault)
<idle>-0 ...: (rcu.rcu_utilization) arg1=0x2 arg2=(fault)
The problem is in get_event_field
val = (unsigned long)(*(char *)addr);
addr points to the position in the ringbuffer where the pointer was
stored. The assignment reads only the lowest byte of the pointer.
Fix the cast to read the whole pointer. The output of the test above
is now
<idle>-0 ... arg1=0xffffffff81c7d3f3 arg2="Start scheduler-tick"
<idle>-0 ... arg1=0xffffffff81c57340 arg2="End scheduler-tick"
Link: https://lore.kernel.org/all/20260620145339.3234726-1-martin@kaiser.cx/
Fixes:
|
||
|
Masami Hiramatsu (Google)
|
251a8fe1b9 |
tracing/probes: Remove WARN_ON_ONCE from parse_btf_arg
Sashiko found that user can cause this WARN_ON_ONCE() easily
with adding a kprobe event based on a raw address with BTF
parameter.
Since this is not an unexpected condition, remove the
WARN_ON_ONCE().
Link: https://lore.kernel.org/all/178177265367.2059927.13789953014706792126.stgit@mhiramat.tok.corp.google.com/
Link: https://sashiko.dev/#/patchset/178165816303.269421.7302603996990753309.stgit%40devnote2
Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes:
|
||
|
Martin Kaiser
|
72c8646956 |
tracing: probes: fix typo in a log message
Fix a typo ("Invalid $-variable") in a log message.
Link: https://lore.kernel.org/all/20260507081041.885781-4-martin@kaiser.cx/
Fixes:
|
||
|
Linus Torvalds
|
26ae421f7f |
pci-v7.2-changes
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Merge tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull pci updates from Bjorn Helgaas:
"Enumeration:
- Remove MPS/MRRS Kconfig settings (CONFIG_PCIE_BUS_*) that worked
around a WiFi device defect; use a quirk or boot-time
"pci=pcie_bus_tune_*" kernel parameter instead (Bjorn Helgaas)
- Always lift 2.5GT/s restriction in PCIe failed link retraining to
avoid clamping a link to 2.5GT/s after hot-plug changes the device
(Maciej W. Rozycki)
- Request bus reassignment when not probe-only to fix an enumeration
regression on Marvell CN106XX and possibly other DT-based systems
(Ratheesh Kannoth)
- Fix procfs race between pci_proc_init() and pci_bus_add_device()
that resulted in 'proc_dir_entry ... already registered' warnings
and pointer corruption (Krzysztof Wilczyński)
- Fix sysfs race that causes 'duplicate filename' warnings and boot
panics by converting PCI resource files to static attributes
(Krzysztof Wilczyński)
- Expose sysfs 'resourceN_resize' attributes only on platforms with
PCI mmap (Krzysztof Wilczyński)
- Require CAP_SYS_ADMIN to write to sysfs 'resourceN_resize'
attributes (Krzysztof Wilczyński)
- Add security_locked_down(LOCKDOWN_PCI_ACCESS) to alpha PCI resource
mmap path to match the generic path (Krzysztof Wilczyński)
- Use kstrtobool() to parse the 'rom' attribute input to avoid the
unexpected behavior of enabling the ROM when writing '0' with no
trailing newline (Krzysztof Wilczyński)
Resource management:
- Improve resource claim logging for debuggability (Ilpo Järvinen)
- Clean up several uses of const parameters (Ilpo Järvinen)
- Check option ROM header signatures and lengths before accessing to
avoid page faults and alignment faults (Guixin Liu)
ASPM:
- Don't reconfigure ASPM when entering low-power D-state; only do it
when returning back to D0 (Carlos Bilbao)
Power management:
- During suspend, set power state to 'unknown' for all devices, not
just those with drivers (Lukas Wunner)
- Skip restoring Resizable BARs and VF Resizable BARs if device
doesn't respond to config reads, to avoid invalid array accesses
(Marco Nenciarini)
- Add pci_suspend_retains_context() so drivers can tell whether
devices retain internal state across suspend/resume, since some
platforms reset devices on suspend; use this in nvme to avoid
issues on Qcom RCs (Manivannan Sadhasivam)
Power control:
- Only to power on/off devices that actually support power control to
avoid poking at incompatible devices mentioned in DT (Manivannan
Sadhasivam)
Virtualization and resets:
- Log device readiness timeouts as errors, not warnings, because the
device is likely unusable in this case (Bjorn Helgaas)
- Wait for device readiness after soft reset (D3hot ->
D0uninitialized transition), when the device may respond with
Request Retry Status (RRS) if it needs more time to initialize
(Bjorn Helgaas)
- Drop unnecessary retries when restoring BARs because resets should
now already include all required delays (Lukas Wunner)
- Avoid FLR for MediaTek MT7925 WiFi, where FLR fails after a VM
terminates uncleanly (Jose Ignacio Tornos Martinez)
- Avoid SBR for Qualcomm WCN6855/WCN7850 WiFi, SDX62/SDX65 modems,
which seem not to support it correctly (Jose Ignacio Tornos
Martinez)
Peer-to-peer DMA:
- Prevent P2PDMA as well as CPU access to non-mappable BARs, e.g.,
s390 ISM BARs (Matt Evans)
- Add Intel QAT, DSA, IAA devices to whitelist (Lukas Wunner)
Endpoint framework:
- Add endpoint controller APIs for use by function drivers to
discover auxiliary blocks like DMA engines (Koichiro Den)
- Remember DesignWare eDMA engine base/size and expose them via the
EPC aux-resource API (Koichiro Den)
- Add endpoint embedded doorbell fallback, used if MSI allocation
fails (Koichiro Den)
- Validate BAR index and remove dead BAR read in endpoint doorbell
test (Carlos Bilbao)
- Unwind MSI/MSI-X vectors if NTB initialization fails part-way
through (Koichiro Den)
- Cache sleepable pci_irq_vector() value at ISR setup to avoid
calling it from hardirq context (Koichiro Den)
- Call sleepable pci_epc_raise_irq() from a work item instead of
atomic context, e.g., when setting bits in NTB peer doorbells in
the ntb_peer_db_set() path (Koichiro Den)
- Report 0-based vNTB doorbell vector to account for link event 0 and
historically skipped slot 1 (Koichiro Den)
- Prevent configfs writes to vNTB db_count and other values that are
already in use after EPC attach (Koichiro Den)
- Account for vNTB db_valid reserved slots (link event 0 and
historically skipped slot 1) so they don't appear as valid
doorbells (Koichiro Den)
- Implement vNTB .db_vector_count()/mask() for doorbells so clients
can use multiple vectors and avoid thundering herds (Koichiro Den)
- Report 0-based NTB doorbell vector to account for link event 0 and
historically skipped slot 1 (Koichiro Den)
- Fix doorbell bitmask and IRQ vector handling to clear only
specified bits, use the correct vector for non-contiguous Linux IRQ
numbers, and validate incoming vectors (Koichiro Den)
- Implement NTB .db_vector_count()/mask() for doorbells so clients
can use multiple vectors (Koichiro Den)
Native PCIe controller infrastructure:
- Add pci_host_common_link_train_delay() for the mandatory delay
after > 5GT/s Link training completes and use it for cadence HPA,
j721e, LGA; dwc; aardvark, mediatek-gen3, rzg3s (Hans Zhang)
- Protect root bus removal with rescan lock in altera, brcmstb,
cadence, dwc, iproc, mediatek, plda, rockchip to prevent
use-after-free or crashes when racing with sysfs rescan or hotplug
(Hans Zhang)
- Add pci_host_common_parse_ports() for use by any native driver to
parse Root Port properties (per-Link features like width, speed,
PHY, power and reset control, etc should be described in Root Port
stanzas, not the host bridge; currently only reset GPIOs
implemented) (Sherry Sun)
New native PCIe controller drivers:
- Add DT binding and driver for UltraRISC DP1000 PCIe controller
(Xincheng Zhang, Jia Wang)
Altera PCIe controller driver:
- Do not dispose of the parent IRQ mapping, which belongs to the
parent interrupt controller (Mahesh Vaidya)
- Fix chained IRQ handler ordering issue and resource leaks on probe
failure (Mahesh Vaidya)
AMD MDB PCIe controller driver:
- Assert PERST# on shutdown so any connected Endpoints are held in
reset during shutdown (Sai Krishna Musham)
Amlogic Meson PCIe controller driver:
- Propagate devm_add_action_or_reset() failure to fix probe error
path (Shuvam Pandey)
- Add .remove() callback to deinitialize the host bridge and power
off the PHY (Shuvam Pandey)
Broadcom iProc PCIe controller driver:
- Restore .map_irq() assignment; its removal broke INTx on the iproc
platform bus driver (Mark Tomlinson)
Broadcom STB PCIe controller driver:
- No change, but products using certain WiFi devices may be affected
by removal of CONFIG_PCIE_BUS_* (see above)
Freescale i.MX6 PCIe controller driver:
- Move IMX6SX_GPR12_PCIE_TEST_POWERDOWN handling into the core reset
functions (Richard Zhu)
- Assert PERST# before enabling regulators to ensure that even if
power is enabled, endpoint stays inactive until REFCLK is stable
(Sherry Sun)
- Parse reset properties in Root Port nodes (falling back to host
bridge) to help support Key E connectors and the pwrctrl framework
(Sherry Sun)
- Configure i.MX95 REF_USE_PAD before PHY reset (Richard Zhu)
- Assert i.MX95 ref_clk_en after reference clock stabilizes (Richard
Zhu)
- Integrate new pwrctrl API for DTs with Root Port-level power
supplies (Sherry Sun)
Intel Gateway PCIe controller driver:
- Enable clock before PHY init for correct ordering (Florian Eckert)
- Add .start_link() callback so the driver works again (Florian
Eckert)
- Stop overwriting the ATU base address discovered by
dw_pcie_get_resources() (Florian Eckert)
- Add DT 'atu' region since this is hardware-specific, and fall back
to driver default if lacking (Florian Eckert)
Loongson PCIe controller driver:
- Ignore downstream devices only on internal bridges to avoid
Loongson hardware issue (Rong Zhang)
- Quirk old Loongson-3C6000 bridges that advertise incorrect
supported link speeds (Ziyao Li)
Marvell MVEBU PCIe controller driver:
- Use fixed-width interrupt masks to avoid truncation in 64-bit
builds (Rosen Penev)
MediaTek PCIe controller driver:
- Use FIELD_PREP() to fix incorrect operator precedence in
PCIE_FTS_NUM_L0 (Li RongQing)
- Fix IRQ domain leak when port fails to enable (Manivannan
Sadhasivam)
- Use actual physical address for MSI message address instead of
virt_to_phys() (Manivannan Sadhasivam)
- Add EcoNet EN7528 to DT binding (Caleb James DeLisle)
MediaTek PCIe Gen3 controller driver:
- Deassert PCIE_PHY_RSTB so REFCLK is stable for at least 100ms
(PCIE_T_PVPERL_MS) before deasserting PERST# (Jian Yang)
- Add .shutdown() to assert PERST# before powering down device (Jian
Yang)
- Do full device power down on removal, including asserting PERST#,
when removing driver (Chen-Yu Tsai)
- Fix a 'failed to create pwrctrl devices' error message that was
inadvertently skipped (Chen-Yu Tsai)
NVIDIA Tegra194 PCIe controller driver:
- Program the DesignWare PORT_AFR L1 entrance latency based on the
'aspm-l1-entry-delay-ns' DT property (Manikanta Maddireddy)
Qualcomm PCIe controller driver:
- Add Eliza SoC compatible in DT binding (Krishna Chaitanya Chundru)
- Set max OPP during resume so DBI register accesses don't fail with
NoC errors (Qiang Yu)
- Add pci_host_common_d3cold_possible() to determine whether
downstream devices are already in D3hot and wakeup-enabled devices
are capable of generating PME from D3cold (Krishna Chaitanya
Chundru)
- Add .get_ltssm() callback to get the LTSSM status without DBI,
since DBI may be inaccessible after PME_Turn_Off (Krishna Chaitanya
Chundru)
- Power down PHY via PARF_PHY_CTRL before disabling rails/clocks to
avoid power leakage (Krishna Chaitanya Chundru)
- Decide whether suspend should put the link in L2 and power down
using pci_host_common_d3cold_possible() instead of checking whether
ASPM L1 is enabled (Krishna Chaitanya Chundru)
- Add qcom D3cold support to tear down interconnect bandwidth and OPP
votes (Krishna Chaitanya Chundru)
- Handle unsupported mixed PERST#/PHY DT configurations, e.g., PHY in
RP node while PERST# is in the RC node, but warn about the DT issue
(Qiang Yu)
- Program T_POWER_ON based on DT 't-power-on-us' property in case
hardware advertises incorrect values (Krishna Chaitanya Chundru)
- Disable ASPM L0s for SA8775P (Shawn Guo)
- Initialize DWC MSI lock for firmware-managed ECAM hosts, which
don't use the dw_pcie_host_init() path that initializes the lock
(Yadu M G)
Renesas RZ/G3S PCIe controller driver:
- Add RZ/V2N DT support (Lad Prabhakar)
SOPHGO PCIe controller driver:
- Add 'dma-coherent' DT property for sg2042-pcie driver (Han Gao)
Synopsys DesignWare PCIe controller driver:
- Apply ECRC TLP Digest workaround for all DesignWare cores prior to
5.10a, not just 4.90a and 5.00a (Manikanta Maddireddy)
- Use common struct dw_pcie 'mode' rather than duplicating it in
artpec6, dra7xx, dwc-pcie, and keembay driver structs (Hans Zhang)
- Use DEFINE_SHOW_ATTRIBUTE for ltssm_status debugfs to reduce
boilerplate and fix a seq_file memory leak by including a
.release() callback (Hans Zhang)
- Fix a signedness bug in fault injection test code (Dan Carpenter)
- Avoid NULL pointer dereference when tearing down debugfs for
controller that lacks RAS DES capability (Shuvam Pandey)
MicroSemi Switchtec management driver:
- Add Gen6 Device IDs (Ben Reed)
Miscellaneous:
- Remove unused gpio.h include from amd-mdb, designware-plat, fu740,
visconti drivers (Andy Shevchenko)
- Fix typos in documentation (josh ziegler)
- Use FIELD_MODIFY() instead of open-coding it (Hans Zhang)"
* tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (168 commits)
PCI/sysfs: Use kstrtobool() to parse the ROM attribute input
PCI/sysfs: Limit BAR resize attribute scope to platforms with PCI mmap
PCI/sysfs: Remove pci_create_legacy_files() and pci_sysfs_init()
PCI/sysfs: Convert legacy I/O and memory attributes to static definitions
PCI/sysfs: Add __weak pci_legacy_has_sparse() helper
alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()
PCI: Add macros for legacy I/O and memory address space sizes
PCI/sysfs: Remove pci_{create,remove}_sysfs_dev_files()
alpha/PCI: Convert resource files to static attributes
alpha/PCI: Add static PCI resource attribute macros
alpha/PCI: Remove WARN from __pci_mmap_fits() and __legacy_mmap_fits()
alpha/PCI: Fix __pci_mmap_fits() overflow for zero-length BARs
alpha/PCI: Use PCI resource accessor macros
alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer
alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
PCI/sysfs: Limit pci_sysfs_init() late_initcall compile scope
PCI/sysfs: Add stubs for pci_{create,remove}_sysfs_dev_files()
PCI/sysfs: Warn about BAR resize failure in __resource_resize_store()
PCI/sysfs: Convert PCI resource files to static attributes
PCI/proc: Fix race between pci_proc_init() and pci_bus_add_device()
...
|
||
|
Linus Torvalds
|
541643982b |
Miscellaneous timer fixes:
- Fix timekeeping locking order bug in the timekeeping init code
(Mikhail Gavrilov)
- Fix u64 multiplication bug in the posix-cpu-timers code
on 32-bit kernels (Zhan Xusheng)
- Fix macro name in comment block (Ethan Nelson-Moore)
- Fix off-by-one bug in the compat settimeofday() usecs
validation code (Wang Yan)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'timers-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc timer fixes from Ingo Molnar:
- Fix timekeeping locking order bug in the timekeeping init code
(Mikhail Gavrilov)
- Fix u64 multiplication bug in the posix-cpu-timers code on 32-bit
kernels (Zhan Xusheng)
- Fix macro name in comment block (Ethan Nelson-Moore)
- Fix off-by-one bug in the compat settimeofday() usecs validation code
(Wang Yan)
* tag 'timers-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: Fix off-by-one in compat settimeofday() usec validation
hrtimer: Correct CONFIG_NO_HZ_COMMON macro name in comment
posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()
timekeeping: Register default clocksource before taking tk_core.lock
|
||
|
Linus Torvalds
|
83db48fb03 |
Misc CPU hotplug fixes:
- Fix CPU hotplug error handling rollback bug
(Bradley Morgan)
- Fix possible output OOB write bug in the sysfs
hotplug states printing code (Bradley Morgan)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'smp-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc CPU hotplug fixes from Ingo Molnar:
- Fix CPU hotplug error handling rollback bug (Bradley Morgan)
- Fix possible output OOB write bug in the sysfs hotplug states
printing code (Bradley Morgan)
* tag 'smp-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu: hotplug: Bound hotplug states sysfs output
cpu: hotplug: Preserve per instance callback errors
|
||
|
Linus Torvalds
|
d88eb9b843 |
- Fix event::addr_filter_ranges lifetime bug (Peter Zijlstra)
Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmo6vAQRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1jXbg/9F1Uv4AjgiEme2lBe2IFjdfT7ETjJobY2 PTEyxG5dY2rUPCgoom2cesHnAx0XjLXGZAm4gGdy0iApi9UMNqtrk4EH5lf3j5c4 x1KUUnvMcxbOxVR/Dcf0d9+AOeA9U8uv63+ANCNi3wSn13jT9d86Gf/ddrAwy70L MooAbNrz+v0EWeKWfWU4B1IYRDgMCXdX697J1cajcqaQU274QhgnsfhNaVPFCHdL Jlolea6gVlBmEhjHaqP1yGrh0ANCSBm5ti81CF++8Y4C/QzeJJ7W8vAD7kATjK1l 6hHgu9JZG7rLy0zBYUll9ODjvKQ35SQ5QEGU0EuKElQcZfkvbn63vqxjcih0/ZqG DbaOpZacF7cDU747O2wpYukQPo220Qkfdh4SpyB+E9pSKAHff7Ap0Aq8xVsNmRCG PbjIcUgHiWN73ulCmfz/UpxXPo8K8VgX5Jvuwl5MCwkMD0M9EbTq4xMSCgPlcYkz KG9jSPO7o3Lh+B0nvzPWOTsPGchqxt1WZSHNDVKpYkH0/4wuBl3odSE/McIcmGqs rdC5uk23Ke2ivUtHSKfrC0bB7BdBDdwRRczPrxm5tXJiEZkhA6G8mnXUgqxWDS63 mlPse0HhtSro7gHyp5kJHyCYHu9WBeSRAr+aVUkAOPBbhdmMAi83/4iML9qwSQ2u 5HRKf/FJr4o= =SNXq -----END PGP SIGNATURE----- Merge tag 'perf-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf event fix from Ingo Molnar: - Fix event::addr_filter_ranges lifetime bug (Peter Zijlstra) * tag 'perf-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: Fix addr_filter_ranges lifetime |
||
|
Linus Torvalds
|
d1c4b50f88 |
- Fix the incorrect RCU protection in rt_spin_unlock()
(Thomas Gleixner) Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmo6u1wRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1inTg/+K9TZr6kE3/Q53VSpGZfk40+Fsrt87Wq1 Bx9u6jsvSGQ2JuchwcPyQB15/zMHrRsEAZ5+oLm7ZI7faCe2EuyrYPuQ02eH1rzI 7lKYJhW//hV6GbtnFdF0WcTHIHpRS6jaiMToxbiX+jrR+vuTBdSALXjyJuZsc36v 9IpdJrA7c7UU5FDC1uHOGzQihf3Zij3+FF1CK/wl91NOSU/mzDZ0lb+LRxvnFUsR RqMMwYZGKWlw6JHA3cu1lFBqodQlpr/AP2usOTHC2L7+1zrQwnBXNOC3ZPy14gKd cSD2KzF/cbjdI+JyoYkWwTp6xeSONpylFbBNOu2uocI0czcASLAtfUN6sxqLk+DQ 9oLCwPDtpTA9IfpQYPhQt+Kt8Sh2o8YNRQIt1ihZ7KAgBfOUYnBGBzxeK3TIfOlS kLW2I1i1UxdYN1FQSzZ/3IQEMQyYEzO/W3A5jr1Rr7k0duZJPCq6Hjt3W58IlS9q 91kre98ARMBJkZ2zQAuXXk9zWA2NpjYNck9vWvBIswFLx6nUc+GqSNZ7+TWBJTgy 8V5urP6Y0zqrLuafwf5fvxviTVXwuXt+3qUYKgRIBUIRk59RbpuMwQhb/d2RGW8X qKdjvp8nSdTbYdYxOCOt/gngsZmifeXVTIT/iWMCGpArILdijJHwFs3labFpXthi dUEim9WgfiE= =6OD/ -----END PGP SIGNATURE----- Merge tag 'locking-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fix from Ingo Molnar: - Fix the incorrect RCU protection in rt_spin_unlock() (Thomas Gleixner) * tag 'locking-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() |
||
|
Linus Torvalds
|
90ae888a37 |
Misc fixes:
- Fix an MM-CID race that can cause an OOB write
(Rik van Riel)
- Fix a debugobjects OOM handling race (Thomas Gleixner)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc core fixes from Ingo Molnar:
- Fix an MM-CID race that can cause an OOB write (Rik van Riel)
- Fix a debugobjects OOM handling race (Thomas Gleixner)
* tag 'core-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
debugobjects: Plug race against a concurrent OOM disable
sched/mmcid: Fix OOB clear_bit when CID is MM_CID_UNSET in fixup path
|
||
|
Linus Torvalds
|
b59e4cae34 |
Miscellaneous irqchip driver fixes:
- Fix indexing bug in the Crossbar irqchip driver (Bhargav Joshi)
- Fix a parent domain resource leak in the Crossbar irqchip
driver (Bhargav Joshi)
- Fix resource leak in the ImgTec PDC irqchip driver's
exit logic (Qingshuang Fu)
- Fix macro name in comment block (Ethan Nelson-Moore)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'irq-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc irqchip driver fixes from Ingo Molnar:
- Fix indexing bug in the Crossbar irqchip driver (Bhargav Joshi)
- Fix a parent domain resource leak in the Crossbar irqchip driver
(Bhargav Joshi)
- Fix resource leak in the ImgTec PDC irqchip driver's exit logic
(Qingshuang Fu)
- Fix macro name in comment block (Ethan Nelson-Moore)
* tag 'irq-urgent-2026-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/msi: Correct CONFIG_PCI_MSI_ARCH_FALLBACKS macro name in comment
irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove
irqchip/crossbar: Fix parent domain resource leak
irqchip/crossbar: Use correct index in crossbar_domain_free()
|
||
|
Linus Torvalds
|
7603d8e780 |
sched_ext: Source tree reorganization for v7.2
Follow-up to the v7.2 sched_ext pull. Pure source reorganization with no
functional change: the kernel/sched/ext* files move into a new
kernel/sched/ext/ subdirectory, and the headers and sources are made
self-contained so editor tooling can parse each file on its own.
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Merge tag 'sched_ext-for-7.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
Pull sched_ext tree reorg from Tejun Heo:
"Pure source reorganization with no functional change:
- the kernel/sched/ext* files move into a new kernel/sched/ext/
subdirectory
- the headers and sources are made self-contained so editor tooling
can parse each file on its own"
* tag 'sched_ext-for-7.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
sched_ext: Move shared helpers from ext.c into internal.h and cid.h
sched_ext: Make kernel/sched/ext/ sources self-contained for clangd
sched_ext: Move sources under kernel/sched/ext/
|
||
|
Ilpo Järvinen
|
71c6e7808e |
resource: Make resource_alignment() input const resource
resource_alignment() does not need to change resource so it can be made const. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://patch.msgid.link/20260429122617.7324-6-ilpo.jarvinen@linux.intel.com |
||
|
Tejun Heo
|
4437ad129c |
sched_ext: Move shared helpers from ext.c into internal.h and cid.h
idle.c and cid.c are included into build_policy.c together with ext.c and use helpers that ext.c defines. Because the helpers live in ext.c, the two files can not parse as standalone units and clangd reports errors in them. Move the helpers to the headers they belong to. The op-dispatch macros and helpers plus scx_parent() to internal.h, and scx_cpu_arg()/scx_cpu_ret() to cid.h. No functional change. idle.c and cid.c now parse clean standalone. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Andrea Righi <arighi@nvidia.com> |
||
|
Tejun Heo
|
3cd1f76be6 |
sched_ext: Make kernel/sched/ext/ sources self-contained for clangd
The sources under kernel/sched/ext/ build as a single translation unit: build_policy.c includes the source files and headers. An LSP/clangd editor parses each as a standalone unit, sees no types, and reports a flood of errors. Give each header its dependencies and include guard, and have each source include the headers it uses. ext.c, arena.c and the ext headers now parse clean standalone. idle.c and cid.c still reference a few macros and helpers defined in ext.c. The next patch moves those to shared headers. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Andrea Righi <arighi@nvidia.com> |
||
|
Ethan Nelson-Moore
|
865730eec5 |
genirq/msi: Correct CONFIG_PCI_MSI_ARCH_FALLBACKS macro name in comment
A comment in kernel/irq/msi.c incorrectly refers to CONFIG_PCI_MSI_ARCH_FALLBACK instead of CONFIG_PCI_MSI_ARCH_FALLBACKS. Correct it. Discovered while searching for CONFIG_* symbols referenced in code but not defined in any Kconfig file. Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20260613213544.90613-1-enelsonmoore@gmail.com |
||
|
Tejun Heo
|
bba2c3615b |
sched_ext: Move sources under kernel/sched/ext/
The sched_ext sources had grown to ten ext* files directly under
kernel/sched/. Move them into a new kernel/sched/ext/ subdirectory and drop
the now-redundant ext_ prefix. ext.c/h keep their names.
kernel/sched/ext.{c,h} -> kernel/sched/ext/ext.{c,h}
kernel/sched/ext_internal.h -> kernel/sched/ext/internal.h
kernel/sched/ext_types.h -> kernel/sched/ext/types.h
kernel/sched/ext_idle.{c,h} -> kernel/sched/ext/idle.{c,h}
kernel/sched/ext_cid.{c,h} -> kernel/sched/ext/cid.{c,h}
kernel/sched/ext_arena.{c,h} -> kernel/sched/ext/arena.{c,h}
The include paths in build_policy.c and sched.h, the MAINTAINERS glob, and a
few documentation and comment references are updated to match. No code or
symbol changes.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
|
||
|
Linus Torvalds
|
2580f89860 |
more s390 updates for 7.2 merge window
- consolidate s390 idle time accounting by moving all CPU time tracking to the architecture backend and eliminate the mix of architecture- specific and common code accounting - Add missing EXPORT_SYMBOL_GPL() to kcpustat_field_idle() and kcpustat_field_iowait() functions - Finalize ptep_get() conversion by replacing direct page table entry dereferencing with proper accessors (ptep_get(), pmdp_get(), etc.) - Explicitly check the buffer length in PKEY_VERIFYPROTK ioctl and pkey_pckmo implementations and fail if the length is exceeded -----BEGIN PGP SIGNATURE----- iI0EABYKADUWIQQrtrZiYVkVzKQcYivNdxKlNrRb8AUCajlD5xccYWdvcmRlZXZA bGludXguaWJtLmNvbQAKCRDNdxKlNrRb8K6cAP48oh4X6XLdK3Eohkm9WjkI0mxZ Qh/tkI1o1GcckwU/zAD+O0LKfJIcb4mo0cH7FgTOJTUCbmPBX711zjom2t9Bvww= =BTXg -----END PGP SIGNATURE----- Merge tag 's390-7.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull more s390 updates from Alexander Gordeev: - consolidate s390 idle time accounting by moving all CPU time tracking to the architecture backend and eliminate the mix of architecture- specific and common code accounting - Add missing EXPORT_SYMBOL_GPL() to kcpustat_field_idle() and kcpustat_field_iowait() functions - Finalize ptep_get() conversion by replacing direct page table entry dereferencing with proper accessors (ptep_get(), pmdp_get(), etc.) - Explicitly check the buffer length in PKEY_VERIFYPROTK ioctl and pkey_pckmo implementations and fail if the length is exceeded * tag 's390-7.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/pkey: Check length in pkey_pckmo handler implementation s390/pkey: Check length in PKEY_VERIFYPROTK ioctl s390/idle: Add missing EXPORT_SYMBOL_GPL() s390/mm: Complete ptep_get() conversion s390/idle: Remove idle time and count sysfs files s390/idle: Provide arch specific kcpustat_field_idle()/kcpustat_field_iowait() s390/irq/idle: Use stcke instead of stckf for time stamps s390/timex: Move union tod_clock type to separate header |
||
|
Wang Yan
|
269f2b43fa |
time: Fix off-by-one in compat settimeofday() usec validation
The compat version of settimeofday() uses '>' instead of '>=' when validating tv_usec against USEC_PER_SEC, allowing the value 1000000 to pass the check. After the subsequent conversion to nanoseconds (tv_nsec *= NSEC_PER_USEC), this results in tv_nsec == NSEC_PER_SEC, which violates the timespec invariant that tv_nsec must be strictly less than NSEC_PER_SEC. The native settimeofday() was already fixed in commit |
||
|
Linus Torvalds
|
2e05544060 |
mm.git review status for mm-hotfixes-stable..mm-nonmm-stable
Everything:
Total patches: 108
Reviews/patch: 0.84
Reviewed rate: 75%
Patch series in this merge:
- The 2 patch series "taskstats: fix TGID dead-thread stat retention"
from Yiyang Chen fixes a taskstats TGID aggregation bug where fields
added in the TGID query path were not preserved after thread exit, and
adds a kselftest covering the regression.
- The 2 patch series "lib/tests: string_helpers: Slight improvements"
from Andy Shevchenko improves lib/tests/string_helpers_kunit.c a little.
- The 2 patch series "lib/base64: decode fixes" from Josh Law addreesses
minor issues in lib/base64.c.
- The 3 patch series "selftests/filelock: Make output more kselftestish"
from Mark Brown makes the output from the ofdlocks test a bit easier for
tooling to work with, and also ignores the generated file.
- The 3 patch series "uaccess: unify inline vs outline
copy_{from,to}_user() selection" from Yury Norov simplifies the usercopy
code by removing the selectability of inlining copy_{from,to}_user().
- The 5 patch series "ocfs2: validate inline xattr header consumers"
from ZhengYuan Huang fixes a number of possible issues in the ocfs2
xattr code.
- The 8 patch series "lib and lib/cmdline enhancements" from Dmitry
Antipov provides additional robustness checking in the cmdline handling
code and its in-kernel testing and selftests.
- The 18 patch series "cleanup the RAID6 P/Q library" from Christoph
Hellwig cleans up the RAID6 P/Q library to match the recent updates to
the RAID 5 XOR library and other CRC/crypto libraries.
- The 3 patch series "ocfs2: harden inode validators against forged
metadata" from Michael Bommarito adds three structural checks to OCFS2
dinode validation so malformed on-disk fields are rejected before
ocfs2_populate_inode() copies them into the in-core inode.
- The 2 patch series "lib/raid: replace __get_free_pages() call with
kmalloc()" from Mike Rapoport cleans up the lib/raid code by using
kmalloc() in more places.
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Merge tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- "taskstats: fix TGID dead-thread stat retention" (Yiyang Chen)
Fix a taskstats TGID aggregation bug where fields added in the TGID
query path were not preserved after thread exit, and adds a kselftest
covering the regression.
- "lib/tests: string_helpers: Slight improvements" (Andy Shevchenko)
Improve lib/tests/string_helpers_kunit.c a little
- "lib/base64: decode fixes" (Josh Law)
Address minor issues in lib/base64.c
- "selftests/filelock: Make output more kselftestish" (Mark Brown)
Make the output from the ofdlocks test a bit easier for tooling to
work with. Also ignore the generated file
- "uaccess: unify inline vs outline copy_{from,to}_user() selection"
(Yury Norov)
Simplify the usercopy code by removing the selectability of inlining
copy_{from,to}_user().
- "ocfs2: validate inline xattr header consumers" (ZhengYuan Huang)
Fix a number of possible issues in the ocfs2 xattr code
- "lib and lib/cmdline enhancements" (Dmitry Antipov)
Provide additional robustness checking in the cmdline handling code
and its in-kernel testing and selftests
- "cleanup the RAID6 P/Q library" (Christoph Hellwig)
Clean up the RAID6 P/Q library to match the recent updates to the
RAID 5 XOR library and other CRC/crypto libraries
- "ocfs2: harden inode validators against forged metadata" (Michael
Bommarito)
Add three structural checks to OCFS2 dinode validation so malformed
on-disk fields are rejected before ocfs2_populate_inode() copies them
into the in-core inode
- "lib/raid: replace __get_free_pages() call with kmalloc()" (Mike
Rapoport)
Clean up the lib/raid code by using kmalloc() in more places
* tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (108 commits)
ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write
ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits
lib: interval_tree_test: validate benchmark parameters
ocfs2: avoid moving extents to occupied clusters
treewide: fix transposed "sign" typos and update spelling.txt
ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec
fat: reject BPB volumes whose data area starts beyond total sectors
selftests/uevent: increase __UEVENT_BUFFER_SIZE to avoid ENOBUFS on busy systems
lib/test_firmware: allocate the configured into_buf size
fs: efs: remove unneeded debug prints
checkpatch: cuppress warnings when Reported-by: is followed by Link:
MAINTAINERS: add Alexander as a kcov reviewer
mailmap: update Alexander Sverdlin's Email addresses
fs: fat: inode: replace sprintf() with scnprintf()
ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent
ocfs2: fix race between ocfs2_control_install_private() and ocfs2_control_release()
ocfs2/dlm: require a ref for locking_state debugfs open
ocfs2: reject FITRIM ranges shorter than a cluster
ocfs2: validate fast symlink target during inode read
ocfs2: add journal NULL check in ocfs2_checkpoint_inode()
...
|
||
|
Bradley Morgan
|
86f436567f |
cpu: hotplug: Bound hotplug states sysfs output
states_show() adds CPU hotplug state names into a single sysfs buffer
using sprintf(). With enough registered states, this can write past the
end of the PAGE_SIZE buffer.
Use sysfs_emit_at() so output is bounded.
Fixes:
|
||
|
Bradley Morgan
|
673db10729 |
cpu: hotplug: Preserve per instance callback errors
cpuhp_invoke_callback() unwinds earlier callbacks for the same
hotplug state when one instance fails. The rollback path currently
reuses ret, so a successful rollback can hide the original error and
make the failed transition look successful.
Keep the rollback result separate from the original error.
Fixes:
|
||
|
Linus Torvalds
|
d639d9fa16 |
liveupdate: updates for 7.2-rc1
- kho: make memory preservation compatible with deferred initialization of
the memory map
- luo: add LIVEUPDATE_SESSION_GET_NAME ioctl and parameter verification for
LIVEUPDATE_IOCTL_CREATE_SESSION ioctl
- luo: documentation updates for liveupdate=on command line option, systemd
support and the current compatibility status
- luo: remove the fixed limits on the number of files that can be preserved
within a single session, and the total number of sessions managed by the
Live Update Orchestrator
- fixes that didn't cut as urgent and were delayed until the merge window:
* reference count incoming File-Lifecycle-Bound (FLB) data so it cannot
be freed while a subsystem is still using it
* fixes for a TOCTOU race in luo_session_retrieve(), a use-after-free in
the file finish and unpreserve paths, concurrent session mutations
during reboot and serialization on preserve_context kexec
* make sure ioctls for incoming LUO sessions are blocked for outgoing
sessions and vice versa
* make sure KHO scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES
* fix memblock tests build issue introduced by KHO changes
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Merge tag 'liveupdate-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux
Pull liveupdate updates from Mike Rapoport:
"Kexec Handover (KHO):
- make memory preservation compatible with deferred initialization
of the memory map
Live Update Orchestrator (LUO):
- add LIVEUPDATE_SESSION_GET_NAME ioctl and parameter verification
for LIVEUPDATE_IOCTL_CREATE_SESSION ioctl
- documentation updates for liveupdate=on command line option,
systemd support and the current compatibility status
- remove the fixed limits on the number of files that can be
preserved within a single session, and the total number of
sessions managed by the LUO
Misc fixes:
- reference count incoming File-Lifecycle-Bound (FLB) data so
it cannot be freed while a subsystem is still using it
- fixes for a TOCTOU race in luo_session_retrieve(), a use-
after-free in the file finish and unpreserve paths, concurrent
session mutations during reboot and serialization on
preserve_context kexec
- make sure ioctls for incoming LUO sessions are blocked for
outgoing sessions and vice versa
- make sure KHO scratch size is always aligned by
CMA_MIN_ALIGNMENT_BYTES
- fix memblock tests build issue introduced by KHO changes"
* tag 'liveupdate-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux: (36 commits)
liveupdate: Document that retrieve failure is permanent
docs: memfd_preservation: fix rendering of ABI documentation
selftests/liveupdate: Add stress-files kexec test
selftests/liveupdate: Add stress-sessions kexec test
selftests/liveupdate: Test session and file limit removal
liveupdate: Remove limit on the number of files per session
liveupdate: Remove limit on the number of sessions
liveupdate: defer session block allocation and physical address setting
kho: add support for linked-block serialization
liveupdate: Extract luo_session_deserialize_one helper
liveupdate: Extract luo_file_deserialize_one helper
liveupdate: register luo_ser as KHO subtree
liveupdate: centralize state management into struct luo_ser
liveupdate: avoid mixing cleanup guards with goto in luo_session_retrieve_fd
liveupdate: change file_set->count type to u64 for type safety
liveupdate: Remove unused ser field from struct luo_session
liveupdate: fix u-a-f in luo_file_unpreserve_files() and luo_file_finish()
liveupdate: block session mutations during reboot
liveupdate: fix TOCTOU race in luo_session_retrieve()
liveupdate: skip serialization for context-preserving kexec
...
|
||
|
Thomas Gleixner
|
89038cc87d |
locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()
rt_spin_unlock() releases the RCU protection before unlocking the
lock. That opens the door for the following UAF scenario:
T1 T2
spin_lock(&p->lock); rcu_read_lock();
invalidate(p); p = rcu_dereference(ptr);
rcu_assign_pointer(ptr, NULL); if (!p) return;
spin_unlock(&p->lock); spin_lock(&p->lock)
lock(&lock->lock);
rcu_read_lock();
kfree_rcu(p); rcu_read_unlock();
....
spin_unlock(&p->lock)
rcu_read_unlock(); // Ends grace period
rcu_do_batch()
kfree(p);
UAF -> rt_mutex_cmpxchg_release(&lock->lock...)
Regular spinlocks keep preemption disabled accross the unlock operation,
which provides full RCU protection, but the RT substitution fails to
resemble that. Same applies for the rwlock substitution.
Move the rcu_read_unlock() invocation past the unlock operations to match
the non-RT semantics. This makes it asymmetric vs. rt_xxx_lock(), but
that's harmless as the caller needs to hold RCU read lock across the lock
operation. The migrate_enable() call stays before the unlock operation
because there is no per CPU operation in the unlock path which would
require migration to be kept disabled.
Fixes:
|
||
|
Rik van Riel
|
de3ab9bd31 |
sched/mmcid: Fix OOB clear_bit when CID is MM_CID_UNSET in fixup path
In mm_cid_fixup_cpus_to_tasks(), when rq->curr has the target mm and
mm_cid.active is set, the CID is checked with cid_in_transit() before
setting the transition bit. In per-CPU mode a newly forked or exec'd
task can be running with mm_cid.cid == MM_CID_UNSET because CIDs are
assigned lazily on schedule-in. With cid_in_transit() the guard passes
for MM_CID_UNSET (no transit bit), converts it to MM_CID_UNSET |
MM_CID_TRANSIT and stores it back; later mm_cid_schedout() feeds this
to clear_bit() with MM_CID_UNSET as the bit number, triggering an
out-of-bounds write.
Symptoms: this is genuine memory corruption, but a bounded out-of-bounds
write, not an arbitrary one. MM_CID_UNSET is the fixed sentinel BIT(31),
so once the bad value reaches mm_cid_schedout() the cid_from_transit_cid()
strip leaves MM_CID_UNSET, which fails the "cid < max_cids" convergence
test and falls into mm_drop_cid() -> clear_bit(MM_CID_UNSET,
mm_cidmask(mm)). The cid bitmap is embedded in the mm_struct slab object
(after cpu_bitmap and mm_cpus_allowed) and is only num_possible_cpus()
bits wide, so clearing bit 31 is a deterministic OOB bit-clear at a
fixed offset of 2^31 / 8 == 256 MiB past the bitmap base. The address is
not attacker-influenced (fixed sentinel -> fixed offset) and the op only
clears a single bit; what sits 256 MiB further along the direct map is
whatever kernel object happens to live there, so this corrupts one bit of
unpredictable kernel memory -- it is not an arbitrary-address or
arbitrary-value write.
It triggers only in per-CPU CID mode, when a CPU is running an active
task of the target mm whose cid is still MM_CID_UNSET -- the
fork()/execve() window before that task's next schedule-in assigns it a
real CID -- and a per-CPU -> per-task fixup walks over it (the mode
fallback driven by a thread exit, sched_mm_cid_exit(), or by the deferred
max_cids recompute in mm_cid_work_fn()).
In practice syzkaller surfaced it as a KASAN use-after-free reported in
__schedule -> mm_cid_switch_to, where the offending clear_bit() is inlined
via mm_cid_schedout() -> mm_drop_cid().
Guard the transition-bit assignment against MM_CID_UNSET, in addition to
the existing cid_in_transit() check, so the bit is only set on a genuine
task-owned CID. A CPU-owned (MM_CID_ONCPU) CID of a running active task
is handled by the cid_on_cpu(pcp->cid) branch above and never reaches
this path, so excluding MM_CID_UNSET (and the already-transitioning case)
is sufficient.
Fixes:
|
||
|
Linus Torvalds
|
a552c81ff4 |
mm.git review status for mm-hotfixes-stable..mm-stable
Everything:
Total patches: 321
Reviews/patch: 1.52
Reviewed rate: 68%
Excluding DAMON:
Total patches: 227
Reviews/patch: 2.07
Reviewed rate: 90%
Excluding DAMON and selftests:
Total patches: 203
Reviews/patch: 2.14
Reviewed rate: 91%
Patchsets in this merge:
- The 2 patch series "selftests/mm: clean up build output and verbosity"
from Li Wang removes some noise from the MM selftests build out.
- The 3 patch series "mm: Free contiguous order-0 pages efficiently"
from Ryan Roberts speeds up the freeing of a batch of 0-order pages by
first scanning them for coalescing opportunities. This is applicable to
vfree() and to the releasing of frozen pages.
- The 11 patch series "mm/damon: introduce DAMOS failed region quota
charge ratio" from SeongJae Park addresses a DAMOS usability issue: The
DAMOS quota often exhausts prematurely because it charges for all memory
attempted, causing slow and inconsistent performance when actions fail
on unreclaimable memory.
To fix this, a new feature lets users set a smaller, flexible quota
charge ratio (via a numerator and denominator) for failed regions.
Since failed actions cause less overhead, reducing their quota cost
ensures more predictable and efficient DAMOS processing
- The 8 patch series "selftests/cgroup: improve zswap tests robustness
and support large page sizes" from Li Wang fixes various spurious
failures and improves the overall robustness of the cgroup zswap
selftests.
- The 3 patch series "fix MAP_DROPPABLE not supported errno" from
Anthony Yznaga fixes an issue in the mlock selftests on arm32.
- The 2 patch series "mm: huge_memory: clean up defrag sysfs with
shared" from Breno Leitao does some maintenance work in the huge_memory
code.
- The 3 patch series "treewide: fixup gfp_t printks" from Brendan
Jackman uses the special vprintf() gfp_t conversion in various places.
- The 6 patch series "mm: Fix vmemmap optimization accounting and
initialization" from Muchun Song fixes several bugs in the vmemmap
optimization, mainly around incorrect page accounting and memmap
initialization in the DAX and memory hotplug paths. It also fixes
pageblock migratetype initialization and struct page initialization for
ZONE_DEVICE compound pages.
- The 4 patch series "mm/damon: repost non-hotfix reviewed patches in
damon/next tree" from is a sprinkle of unrelated minor bugfixes for
DAMON.
- The 3 patch series "mm: remove page_mapped()" from David Hildenbrand
remove this function from the tree, replacing it with folio_mapped().
- The 10 patch series "mm/damon: let DAMON be paused and resumed" from
SeongJae Park permits DAMON to be paused and resumed without losing its
current state.
- The 3 patch series "kasan: hw_tags: Disable tagging for stack and
page-tables" from Muhammad Usama Anjum simplifies and speeds up kasan by
removing its ineffective tagging of stacks and page tables.
- The 7 patch series "mm/damon/reclaim,lru_sort: monitor all system rams
by default" from SeongJae Park simplifies deployment on diverse hardware
like NUMA systems by updating DAMON_RECLAIM and DAMON_LRU_SORT to
automatically monitor the physical address range covering all System RAM
areas by default, replacing the overly restrictive behavior that only
targeted the single largest memory block to save on negligible overhead.
- The 2 patch series "mm/damon/sysfs: document filters/ directory as
deprecated" from SeongJae Park updates some DAMON docs.
- The 8 patch series "mm: use spinlock guards for zone lock" from Dmitry
Ilvokhin switches zone->lock handling over to using the guard()
mechanisms.
- The 2 patch series "mm/filemap: tighten mmap_miss hit accounting" from
fujunjie fixes a flaw where the mmap_miss counter over-credited page
cache hits during fault-arounds and page-fault retries. This results in
significant reduction of redundant synchronous mmap readahead I/O,
drastically cutting down execution time and gigabytes read for sparse
random or strided memory access workloads.
- The 2 patch series "selftests/cgroup: Fix false positive failures in
test_percpu_basic" from Li Wang fixes a couple of false-positives in the
cgroup kmem selftests.
- The 2 patch series "mm/damon/reclaim: support monitoring intervals
auto-tuning" from SeongJae Park adds a new parameter to DAMON permitting
DAMON_RECLAIM to automatically tune DAMON's sampling and aggregation
intervals.
- The 2 patch series "mm/damon/stat: add kdamond_pid parameter" from
SeongJae Park chnges DAMON_STAT to provide the pid of its kdamond.
- The 2 patch series "mm/kmemleak: dedupe verbose scan output" from
Breno Leitao removes large amounts of duplicated backtraces from the
verbose-mode kmemleak output.
- The 8 patch series "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1)"
from David Hildenbrand reduces our use of CONFIG_HAVE_BOOTMEM_INFO_NODE,
with a view to removing it entirely in a later series.
- The 2 patch series "mm/damon: validate min_region_size to be power of
2" from Liew Rui Yan prevents users from passing a non-power-of-2 value
of `addr_unit', as this later results in undesirable behavior.
- The 2 patch series "mm: document read_pages and simplify usage" from
Frederick Mayle does as claimed.
- The 3 patch series "tools/mm/page-types: Fix misc bugs" from Ye Liu
fixes three issues in tools/mm/page-types.c.
- The 4 patch series "mm: misc cleanups from __GFP_UNMAPPED series" from
Brendan Jackman implements several cleanups in the page allocator and
related code.
- The 12 patch series "mm, swap: swap table phase IV: unify allocation"
from Kairui Song unifies the allocation and charging of anon and shmem
swap in folios, provides better synchronization, consolidates the
metadata management, hence dropping the static array and map, and
improves performance.
- The 28 patch series "mm/damon: introduce data attributes monitoring"
from SeongJae Park extends DAMON for monitoring general data attributes
other than accesses.
- The 5 patch series "mm/vmalloc: free unused pages on vrealloc()
shrink" from Shivam Kalra implements the TODO in vrealloc() to unmap and
free unused pages when shrinking across a page boundary.
- The 3 patch series "mm/damon: documentation and comment fixes" from
niecheng does as advertised.
- The 3 patch series "remove mmap_action success, error hooks" from
Lorenzo Stoakes eliminates custom hooks from mmap_action by removing the
problematic success_hook which allowed drivers to improperly access
uninitialized VMAs. It replaces the error_hook with a simple error-code
field and updates the memory char driver accordingly.
- The 14 patch series "mm/damon: minor improvements for code readability
and tests" from SeongJae Park implements minor improvements in code
readability and tests for DAMON.
- The 2 patch series "mm/damon: fix macro arguments and clarify quota
goals doc" from Maksym Shcherba does those things.
- The 2 patch series "userfaultfd: merge fs/userfaultfd.c into
mm/userfaultfd.c" from Mike Rapoport performs that code movement.
- The 15 patch series "mm/mglru: improve reclaim loop and dirty folio"
from Kairui Song and others cleans up and slightly improves MGLRU's
reclaim loop and dirty writeback handling. Large performance
improvements are measured.
- The 3 patch series "use vma locks for proc/pid/{smaps|numa_maps}
reads" from Suren Baghdasaryan uses per-vma locks when reading
/proc/pid/smaps and /proc/pid/numa_maps similar to reduce contention on
central mmap_lock.
- The 2 patch series "refactors thpsize_shmem_enabled_store() and
thpsize_shmem_enabled_show()" from Ran Xiaokai provides some cleanup
work in the THP code.
- The 2 patch series "selftests/memfd: fix compilation warnings" from
Konstantin Khorenko fixes a few build glitches in the memfd selftest
code.
- The 4 patch series "memcg: shrink obj_stock_pcp and cache multiple
objcgs" from Shakeel Butt resolves a 68% performance regression caused
by NUMA-node cache thrashing around struct obj_stock_pcp by shrinking
its existing fields and expanding it into a multi-slot array that caches
up to five obj_cgroup pointers per CPU, allowing per-node variants of
the same memcg to coexist within a single 64-byte cache line.
- The 2 patch series "zram: writeback fixes" from Sergey Senozhatsky
addresses a couple of unrelated zram writeback issues.
- The 9 patch series "mm: switch THP shrinker to list_lru" from Johannes
Weiner resolves NUMA-awareness issues and streamlines callsite
interaction by refactoring and extending the list_lru API to completely
replace the complex, open-coded deferred split queue for Transparent
Huge Pages (THPs).
- The 2 patch series "mm: improve large folio readahead for exec memory"
from Usama Arif improves large-folio readahead on systems like 64K-page
arm64 by preventing the mmap_miss check from permanently disabling
target-oriented VM_EXEC readahead, and by generalizing the
force_thp_readahead gate to support mappings with any usefully large
maximum folio order under the cache cap.
- The 6 patch series "userfaultfd/pagemap: pre-existing fixes" from
Kiryl Shutsemau fixes a bunch of minor issues in the
userfaultfd/pagemap, all of which were flagged by Sashiko review of
proposed new material.
- The 5 patch series "mm/sparse-vmemmap: Provide generic
vmemmap_set_pmd() and vmemmap_check_pmd()" from Muchun Song provides
generic versions of these two functions so the four arch-specific
implementations can be removed.
- The 2 patch series "mm/swap, PM: hibernate: fix swapoff race in
uswsusp by pinning swap device" from Youngjun Park addresses a
uswsusp-vs-swapoff race and reduces the swap device reference
taking/releasing frequency.
- The 2 patch series "mm/hmm: A fix and a selftest" from Dev Jain does
as claimed.
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Merge tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "selftests/mm: clean up build output and verbosity" (Li Wang)
Remove some noise from the MM selftests build
- "mm: Free contiguous order-0 pages efficiently" (Ryan Roberts)
Speed up the freeing of a batch of 0-order pages by first scanning
them for coalescing opportunities. This is applicable to vfree() and
to the releasing of frozen pages
- "mm/damon: introduce DAMOS failed region quota charge ratio"
(SeongJae Park)
Address a DAMOS usability issue: The DAMOS quota often exhausts
prematurely because it charges for all memory attempted, causing slow
and inconsistent performance when actions fail on unreclaimable
memory.
To fix this, a new feature lets users set a smaller, flexible quota
charge ratio (via a numerator and denominator) for failed regions.
Since failed actions cause less overhead, reducing their quota cost
ensures more predictable and efficient DAMOS processing
- "selftests/cgroup: improve zswap tests robustness and support large
page sizes" (Li Wang)
Fix various spurious failures and improves the overall robustness of
the cgroup zswap selftests
- "fix MAP_DROPPABLE not supported errno" (Anthony Yznaga)
Fix an issue in the mlock selftests on arm32
- "mm: huge_memory: clean up defrag sysfs with shared" (Breno Leitao)
Some maintenance work in the huge_memory code
- "treewide: fixup gfp_t printks" (Brendan Jackman)
Use the special vprintf() gfp_t conversion in various places
- "mm: Fix vmemmap optimization accounting and initialization" (Muchun
Song)
Fix several bugs in the vmemmap optimization, mainly around incorrect
page accounting and memmap initialization in the DAX and memory
hotplug paths. It also fixes pageblock migratetype initialization and
struct page initialization for ZONE_DEVICE compound pages
- "mm/damon: repost non-hotfix reviewed patches in damon/next tree"
A sprinkle of unrelated minor bugfixes for DAMON
- "mm: remove page_mapped()" (David Hildenbrand)
Remove this function from the tree, replacing it with folio_mapped()
- "mm/damon: let DAMON be paused and resumed" (SeongJae Park)
Allow DAMON to be paused and resumed without losing its current state
- "kasan: hw_tags: Disable tagging for stack and page-tables" (Muhammad
Usama Anjum)
Simplify and speed up kasan by removing its ineffective tagging of
stacks and page tables
- "mm/damon/reclaim,lru_sort: monitor all system rams by default"
(SeongJae Park)
Simplify deployment on diverse hardware like NUMA systems by updating
DAMON_RECLAIM and DAMON_LRU_SORT to automatically monitor the
physical address range covering all System RAM areas by default,
replacing the overly restrictive behavior that only targeted the
single largest memory block to save on negligible overhead
- "mm/damon/sysfs: document filters/ directory as deprecated" (SeongJae
Park)
Update some DAMON docs
- "mm: use spinlock guards for zone lock" (Dmitry Ilvokhin)
Switch zone->lock handling over to using the guard() mechanisms
- "mm/filemap: tighten mmap_miss hit accounting" (fujunjie)
Fix a flaw where the mmap_miss counter over-credited page cache hits
during fault-arounds and page-fault retries. This results in
significant reduction of redundant synchronous mmap readahead I/O,
drastically cutting down execution time and gigabytes read for sparse
random or strided memory access workloads
- "selftests/cgroup: Fix false positive failures in test_percpu_basic"
(Li Wang)
Fix a couple of false-positives in the cgroup kmem selftests
- "mm/damon/reclaim: support monitoring intervals auto-tuning"
(SeongJae Park)
Add a new parameter to DAMON permitting DAMON_RECLAIM to
automatically tune DAMON's sampling and aggregation intervals
- "mm/damon/stat: add kdamond_pid parameter" (SeongJae Park)
Change DAMON_STAT to provide the pid of its kdamond
- "mm/kmemleak: dedupe verbose scan output" (Breno Leitao)
Remove large amounts of duplicated backtraces from the verbose-mode
kmemleak output
- "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1)" (David
Hildenbrand)
Reduce our use of CONFIG_HAVE_BOOTMEM_INFO_NODE, with a view to
removing it entirely in a later series
- "mm/damon: validate min_region_size to be power of 2" (Liew Rui Yan)
Prevent users from passing a non-power-of-2 value of `addr_unit', as
this later results in undesirable behavior
- "mm: document read_pages and simplify usage" (Frederick Mayle)
- "tools/mm/page-types: Fix misc bugs" (Ye Liu)
Fix three issues in tools/mm/page-types.c
- "mm: misc cleanups from __GFP_UNMAPPED series" (Brendan Jackman)
Implement several cleanups in the page allocator and related code
- "mm, swap: swap table phase IV: unify allocation" (Kairui Song)
Unify the allocation and charging of anon and shmem swap in folios,
provides better synchronization, consolidates the metadata
management, hence dropping the static array and map, and improves
performance
- "mm/damon: introduce data attributes monitoring" (SeongJae Park(
Extend DAMON to monitor general data attributes other than accesses
- "mm/vmalloc: free unused pages on vrealloc() shrink" (Shivam Kalra)
Implement the TODO in vrealloc() to unmap and free unused pages when
shrinking across a page boundary
- "mm/damon: documentation and comment fixes" (niecheng)
- "remove mmap_action success, error hooks" (Lorenzo Stoakes)
Eliminate custom hooks from mmap_action by removing the problematic
success_hook which allowed drivers to improperly access uninitialized
VMAs. It replaces the error_hook with a simple error-code field and
updates the memory char driver accordingly
- "mm/damon: minor improvements for code readability and tests"
(SeongJae Park)
- "mm/damon: fix macro arguments and clarify quota goals doc" (Maksym
Shcherba)
- "userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c" (Mike
Rapoport)
- "mm/mglru: improve reclaim loop and dirty folio" (Kairui Song and
others)
Clean up and slightly improves MGLRU's reclaim loop and dirty
writeback handling. Large performance improvements are measured
- "use vma locks for proc/pid/{smaps|numa_maps} reads" (Suren
Baghdasaryan)
Use per-vma locks when reading /proc/pid/smaps and numa_maps similar
to reduce contention on central mmap_lock
- "refactors thpsize_shmem_enabled_store() and thpsize_shmem_enabled_show()"
(Ran Xiaokai)
Some cleanup work in the THP code
- "selftests/memfd: fix compilation warnings" (Konstantin Khorenko)
Fix a few build glitches in the memfd selftest code.
- "memcg: shrink obj_stock_pcp and cache multiple objcgs" (Shakeel
Butt)
Resolve a 68% performance regression caused by NUMA-node cache
thrashing around struct obj_stock_pcp by shrinking its existing
fields and expanding it into a multi-slot array that caches up to
five obj_cgroup pointers per CPU, allowing per-node variants of the
same memcg to coexist within a single 64-byte cache line.
- "zram: writeback fixes" (Sergey Senozhatsky)
address a couple of unrelated zram writeback issues
- "mm: switch THP shrinker to list_lru" (Johannes Weiner)
Resolve NUMA-awareness issues and streamlines callsite interaction by
refactoring and extending the list_lru API to completely replace the
complex, open-coded deferred split queue for Transparent Huge Pages
- "mm: improve large folio readahead for exec memory" (Usama Arif)
Improve large-folio readahead on systems like 64K-page arm64 by
preventing the mmap_miss check from permanently disabling
target-oriented VM_EXEC readahead, and by generalizing the
force_thp_readahead gate to support mappings with any usefully large
maximum folio order under the cache cap.
- "userfaultfd/pagemap: pre-existing fixes" (Kiryl Shutsemau)
Fix a bunch of minor issues in the userfaultfd/pagemap, all of which
were flagged by Sashiko review of proposed new material
- "mm/sparse-vmemmap: Provide generic vmemmap_set_pmd() and
vmemmap_check_pmd()" (Muchun Song)
Provide generic versions of these two functions so the four
arch-specific implementations can be removed.
- "mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap
device" (Youngjun Park)
Address a uswsusp-vs-swapoff race and reduces the swap device
reference taking/releasing frequency.
- "mm/hmm: A fix and a selftest" (Dev Jain)
* tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (321 commits)
selftests/mm/hmm-tests: test pagemap reads of PMD device-private entries
fs/proc/task_mmu: do not warn on seeing non-migration pmd entry
lib/test_hmm: check alloc_page_vma() return value and handle OOM
mm/compaction: cap compact_gap() at COMPACT_CLUSTER_MAX
mm/swap: remove redundant swap device reference in alloc/free
mm/swap, PM: hibernate: fix swapoff race in uswsusp by pinning swap device
mm/filemap: use folio_next_index() for start
vmalloc: fix NULL pointer dereference in is_vm_area_hugepages()
sparc/mm: drop vmemmap_check_pmd helper and use generic code
loongarch/mm: drop vmemmap_check_pmd helper and use generic code
riscv/mm: drop vmemmap_pmd helpers and use generic code
arm64/mm: drop vmemmap_pmd helpers and use generic code
mm/sparse-vmemmap: provide generic vmemmap_set_pmd() and vmemmap_check_pmd()
rust: page: mark Page::nid as inline
userfaultfd: build __VMA_UFFD_FLAGS from config-gated masks
userfaultfd: gate must_wait writability check on pte_present()
mm/huge_memory: preserve pmd_swp_uffd_wp on device-private PMD downgrade
fs/proc/task_mmu: fix hugetlb self-deadlock in pagemap_scan_pte_hole()
fs/proc/task_mmu: use huge_page_size() in pagemap_scan_hugetlb_entry()
fs/proc/task_mmu: fix make_uffd_wp_huge_pte() prot-update race
...
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||
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Peter Zijlstra
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e62d4192e5 |
perf: Fix addr_filter_ranges lifetime
Lee Jia Jie reported that since event::addr_filter_ranges is used under RCU, it should be RCU freed. Reported-by: Lee Jia Jie <jiajie.lee@starlabs.sg> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> |
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Linus Torvalds
|
9ecfb2f728 |
ring-buffer: Updates for v7.2:
- Do not invalidate entire buffer for invalid sub-buffers For the persistent ring buffer, if one sub-buffer is found to be invalid, it invalidates the entire per CPU ring buffer. This can lose a lot of valuable data if there's some corruption with the writes to the buffer not syncing properly on a hard crash. Instead, if a sub-buffer is found to be invalid, simply zero it out and mark it for "missed events". When the persistent ring buffer is read and a sub-buffer that was cleared due to being invalid on boot up is discovered, the output will show "[LOST EVENTS]" to let the user know that events were missing at that location. Displaying the events from valid buffers can still be useful. - Add a test to be able to test corrupted sub-buffers If a persistent ring buffer is created as "ptraingtest" and the new config that adds the test is enabled, when a panic happens, the kernel will randomly corrupt one of the per CPU ring buffers. On boot up, the sub-buffers with the corruption should be cleared and flagged. When reading this buffer, the missed events should should [LOST EVENTS]. - Add commit number in the sub-buffer meta debug info The commit is used to know the content of a meta page. Add it to the buffer_meta file that is shown for each per CPU buffer. - Clean up the persistent ring buffer validation code Add some helper functions and make variable names more consistent. -----BEGIN PGP SIGNATURE----- iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCajMDZBQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qhDLAP4i0b8HP159LOEy/IiQKZ7hfAaUhTK8 imMVS6V1bVKTjgD8Dy/f9m8259ZIcgN9mjSKXlT30qAeGmhjjDCdc0TnagM= =mokF -----END PGP SIGNATURE----- Merge tag 'trace-ring-buffer-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull ring-buffer updates from Steven Rostedt - Do not invalidate entire buffer for invalid sub-buffers For the persistent ring buffer, if one sub-buffer is found to be invalid, it invalidates the entire per CPU ring buffer. This can lose a lot of valuable data if there's some corruption with the writes to the buffer not syncing properly on a hard crash. Instead, if a sub-buffer is found to be invalid, simply zero it out and mark it for "missed events". When the persistent ring buffer is read and a sub-buffer that was cleared due to being invalid on boot up is discovered, the output will show "[LOST EVENTS]" to let the user know that events were missing at that location. Displaying the events from valid buffers can still be useful. - Add a test to be able to test corrupted sub-buffers If a persistent ring buffer is created as "ptraingtest" and the new config that adds the test is enabled, when a panic happens, the kernel will randomly corrupt one of the per CPU ring buffers. On boot up, the sub-buffers with the corruption should be cleared and flagged. When reading this buffer, the missed events should should [LOST EVENTS]. - Add commit number in the sub-buffer meta debug info The commit is used to know the content of a meta page. Add it to the buffer_meta file that is shown for each per CPU buffer. - Clean up the persistent ring buffer validation code Add some helper functions and make variable names more consistent. * tag 'trace-ring-buffer-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: ring-buffer: Better comment the use of RB_MISSED_EVENTS ring-buffer: Show persistent buffer dropped events in trace_pipe file ring-buffer: Show persistent buffer dropped events in trace file ring-buffer: Have dropped subbuffers be persistent across reboots ring-buffer: Cleanup buffer_data_page related code ring-buffer: Cleanup persistent ring buffer validation ring-buffer: Show commit numbers in buffer_meta file ring-buffer: Add persistent ring buffer invalid-page inject test ring-buffer: Skip invalid sub-buffers when rewinding persistent ring buffer ring-buffer: Skip invalid sub-buffers when validating persistent ring buffer |
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Linus Torvalds
|
23b5d045ae |
tracing: Updates for v7.2:
- Remove a redundant IS_ERR() check trace_pipe_open() already checks for IS_ERR() and does it again in the return path. Remove the return check. - Export seq_buf_putmem_hex() to allow kunit tests against them To add Kunit tests on seq_buf_putmem_hex(), it needs to be exported. - Replace strcat() and strcpy() with seq_buf() logic The code for synthetic events uses a series of strcat() and strcpy() which can be error prone. Replace them with seq_buf() logic that does all the necessary bound checking. - Add a lockdep rcu_is_watching() to trace_##event##_enabled() call The trace_##event##_enabled() is a static branch that is true if the "event" is enabled. But this can hide bugs if this logic is in a location where RCU is disabled and not "watching". It would only trigger if lockdep is enabled and the event is enabled. Add a "rcu_is_watching()" warning if lockdep is enabled in that helper function to trigger regardless if the event is enabled or not. - Remove the local variable in the trace_printk() macro For name space integrity, remove the _______STR variable in the trace_printk() macro for using the sizeof() macro directly. - Use guard()s for the trace_recursion_record.c file - Fix typo in a comment of eventfs_callback() kerneldoc - Use trace_call__##event() in events called within trace_##event##_enabled() A couple of events are called within an if block guarded by trace_##event##_enabled(). That is a static key that is only enabled when the event is enabled. The trace_call_##event() calls the tracepoint code directly without adding a redundant static key for that check. - Allow perf to read synthetic events Currently, perf does not have the ability to enable a synthetic event. If it does, it will either cause a kernel warning or error with "No such device". Synthetic events are not much different than kprobes and perf can handle fine with a few modifications. - Replace printk(KERN_WARNING ...) with pr_warn() - Replace krealloc() on an array with krealloc_array() - Fix README file path name for synthetic events - Change tracing_map tracing_map_array to use a flexible array Instead of allocating a separate pointer to hold the pages field of tracing_map_array, allocate the pages field as a flexible array when allocating the structure. - Fold trace_iterator_increment() into trace_find_next_entry_inc() The function trace_iterator_increment() was only used by trace_find_next_entry_inc(). It's not big enough to be a helper function for one user. Fold it into its caller. - Make field_var_str field a flexible array of hist_elt_data Instead of allocating a separate pointer for the field_var_str array of the hist_elt_data structure, allocate it as a flexible array when allocating the structure. - Disable KCOV for trace_irqsoff.c Like trace_preemptirq.c, trace_irqsoff.c has code that will crash when KCOV is enabled on ARM. The irqsoff tracing can be called on ARM because the irqsoff tracing code can be run from early interrupt code and produce coverage unrelated to syscall inputs. - Fix warning in __unregister_ftrace_function() called by perf Perf calls unregister_ftrace_function() without checking if its ftrace_ops has already been unregistered. There's an error path where on clean up it will unregister the ftrace_ops even if it wasn't registered and causes a warning. -----BEGIN PGP SIGNATURE----- iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCajHGbRQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qqP/AP4nv/Tmv6T7vxMzL7dY/WJ0xT2xkW7Z tlejy1AM/RBaTAEAkkgdDNhIAJwxCxsmY6/Zr1mRWzaF7O4kX94KYFcBHww= =7nyZ -----END PGP SIGNATURE----- Merge tag 'trace-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing updates from Steven Rostedt: - Remove a redundant IS_ERR() check trace_pipe_open() already checks for IS_ERR() and does it again in the return path. Remove the return check. - Export seq_buf_putmem_hex() to allow kunit tests against them To add Kunit tests on seq_buf_putmem_hex(), it needs to be exported. - Replace strcat() and strcpy() with seq_buf() logic The code for synthetic events uses a series of strcat() and strcpy() which can be error prone. Replace them with seq_buf() logic that does all the necessary bound checking. - Add a lockdep rcu_is_watching() to trace_##event##_enabled() call The trace_##event##_enabled() is a static branch that is true if the "event" is enabled. But this can hide bugs if this logic is in a location where RCU is disabled and not "watching". It would only trigger if lockdep is enabled and the event is enabled. Add a "rcu_is_watching()" warning if lockdep is enabled in that helper function to trigger regardless if the event is enabled or not. - Remove the local variable in the trace_printk() macro For name space integrity, remove the _______STR variable in the trace_printk() macro for using the sizeof() macro directly. - Use guard()s for the trace_recursion_record.c file - Fix typo in a comment of eventfs_callback() kerneldoc - Use trace_call__##event() in events within trace_##event##_enabled() A couple of events are called within an if block guarded by trace_##event##_enabled(). That is a static key that is only enabled when the event is enabled. The trace_call_##event() calls the tracepoint code directly without adding a redundant static key for that check. - Allow perf to read synthetic events Currently, perf does not have the ability to enable a synthetic event. If it does, it will either cause a kernel warning or error with "No such device". Synthetic events are not much different than kprobes and perf can handle fine with a few modifications. - Replace printk(KERN_WARNING ...) with pr_warn() - Replace krealloc() on an array with krealloc_array() - Fix README file path name for synthetic events - Change tracing_map tracing_map_array to use a flexible array Instead of allocating a separate pointer to hold the pages field of tracing_map_array, allocate the pages field as a flexible array when allocating the structure. - Fold trace_iterator_increment() into trace_find_next_entry_inc() The function trace_iterator_increment() was only used by trace_find_next_entry_inc(). It's not big enough to be a helper function for one user. Fold it into its caller. - Make field_var_str field a flexible array of hist_elt_data Instead of allocating a separate pointer for the field_var_str array of the hist_elt_data structure, allocate it as a flexible array when allocating the structure. - Disable KCOV for trace_irqsoff.c Like trace_preemptirq.c, trace_irqsoff.c has code that will crash when KCOV is enabled on ARM. The irqsoff tracing can be called on ARM because the irqsoff tracing code can be run from early interrupt code and produce coverage unrelated to syscall inputs. - Fix warning in __unregister_ftrace_function() called by perf Perf calls unregister_ftrace_function() without checking if its ftrace_ops has already been unregistered. There's an error path where on clean up it will unregister the ftrace_ops even if it wasn't registered and causes a warning. * tag 'trace-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: perf/ftrace: Fix WARNING in __unregister_ftrace_function tracing: Disable KCOV instrumentation for trace_irqsoff.o tracing: Turn hist_elt_data field_var_str into a flexible array tracing: Move trace_iterator_increment() into trace_find_next_entry_inc() tracing: Simplify pages allocation for tracing_map logic tracing: Fix README path for synthetic_events tracing: Use krealloc_array() for trace option array growth tracing/branch: Use pr_warn() instead of printk(KERN_WARNING) tracing: Allow perf to read synthetic events HID: Use trace_call__##name() at guarded tracepoint call sites cpufreq: amd-pstate: Use trace_call__##name() at guarded tracepoint call site tracefs: Fix typo in a comment of eventfs_callback() kerneldoc tracing: Switch trace_recursion_record.c code over to use guard() tracing: Remove local variable for argument detection from trace_printk() tracepoint: Add lockdep rcu_is_watching() check to trace_##name##_enabled() tracing: Bound synthetic-field strings with seq_buf seq_buf: Export seq_buf_putmem_hex() and add KUnit tests tracing: Remove redundant IS_ERR() check in trace_pipe_open() |
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Shardul Deshpande
|
07669b0abe |
treewide: fix transposed "sign" typos and update spelling.txt
Several comments transpose the letters in "assigned" and "unsigned", spelling them with "sing" instead of "sign". Correct all of them. Of these, the misspelling of "assigned" is not yet flagged by checkpatch, so also add it to scripts/spelling.txt. The remaining matches of `grep -ri singed` are RISINGEDGE register and enum names, not typos. Link: https://lore.kernel.org/20260612181633.734458-1-iamsharduld@gmail.com Signed-off-by: Shardul Deshpande <iamsharduld@gmail.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: SeongJae Park <sj@kernel.org> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Linus Torvalds
|
4cc14386e3 |
dma-mapping updates for Linux 7.2:
- added more checks for DMA attributes in the debug code, especially to ensure that mappings are created and released with matching attributes (Leon Romanovsky) - better default configuration for CMA on NUMA machines (Feng Tang) - little code cleanup in dma benchmark tool (Rosen Penev) -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQSrngzkoBtlA8uaaJ+Jp1EFxbsSRAUCajESmAAKCRCJp1EFxbsS RKEuAQCpRF+ifclSitwzKYEUX0OY+ZqBcP+L2wqQRkjqbicv7gD+OcE5BhoctdP1 sXUaoZRHHeQ+Pz5kjS2ppSmrG2tT8AQ= =t3Sk -----END PGP SIGNATURE----- Merge tag 'dma-mapping-7.2-2026-06-16' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux Pull dma-mapping updates from Marek Szyprowski: - added checks for DMA attributes in the debug code, especially to ensure that mappings are created and released with matching attributes (Leon Romanovsky) - better default configuration for CMA on NUMA machines (Feng Tang) - code cleanup in dma benchmark tool (Rosen Penev) * tag 'dma-mapping-7.2-2026-06-16' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux: dma: map_benchmark: turn dma_sg_map_param buf into a flexible array dma-contiguous: simplify numa cma area handling dma-contiguous: add kconfig option to setup numa cma area if not configured explicitly dma-debug: Ensure mappings are created and released with matching attributes dma-debug: Feed DMA attribute for unmapping flows too dma-debug: Record DMA attributes in debug entry dma-debug: Remove unused DMA attribute parameter ntb: Use consistent DMA attributes when freeing DMA mappings ntb: Store original DMA address for future release |
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Linus Torvalds
|
0db1496dcb |
printk changes for 7.2
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Linus Torvalds
|
d44ade05aa |
virtio,vhost,vdpa: features, fixes
- new virtio CAN driver
- support for LoongArch architecture in fw_cfg
- support for firmware notifications in vdpa/octeon_ep
- support for VFs in virtio core
- fixes, cleanups all over the place, notably
- vhost: fix vhost_get_avail_idx for a non empty ring
fixing an significant old perf regression
- plus READ_ONCE annotations mean virtio ring is now
free of KCSAN warnings
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
- new virtio CAN driver
- support for LoongArch architecture in fw_cfg
- support for firmware notifications in vdpa/octeon_ep
- support for VFs in virtio core
- fixes, cleanups all over the place, notably:
- vhost: fix vhost_get_avail_idx for a non empty ring
fixing an significant old perf regression
- READ_ONCE() annotations mean virtio ring is now
free of KCSAN warnings
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (37 commits)
can: virtio: Fix comment in UAPI header
can: virtio: Add virtio CAN driver
virtio: add num_vf callback to virtio_bus
fw_cfg: Add support for LoongArch architecture
vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
vdpa/octeon_ep: Add vDPA device event handling for firmware notifications
vdpa/octeon_ep: Use 4 bytes for mailbox signature
vdpa/octeon_ep: Fix PF->VF mailbox data address calculation
vhost_task_create: kill unnecessary .exit_signal initialization
vhost: remove unnecessary module_init/exit functions
vdpa/mlx5: Use kvzalloc_flex() for MTT command memory
vdpa_sim_net: switch to dynamic root device
vdpa_sim_blk: switch to dynamic root device
virtio-mem: Destroy mutex before freeing virtio_mem
virtio-balloon: Destroy mutex before freeing virtio_balloon
tools/virtio: fix build for kmalloc_obj API and missing stubs
virtio_ring: Add READ_ONCE annotations for device-writable fields
vduse: fix compat handling for VDUSE_IOTLB_GET_FD/VDUSE_VQ_GET_INFO
tools/virtio: check mmap return value in vringh_test
vhost/net: complete zerocopy ubufs only once
...
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Ethan Nelson-Moore
|
f8aceb1adb |
hrtimer: Correct CONFIG_NO_HZ_COMMON macro name in comment
A comment in kernel/time/hrtimer.c incorrectly refers to CONFIG_NOHZ_COMMON instead of CONFIG_NO_HZ_COMMON. Correct it. Discovered while searching for CONFIG_* symbols referenced in code but not defined in any Kconfig file. Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20260609034314.25029-1-enelsonmoore@gmail.com |
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Zhan Xusheng
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26aff38fef |
posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()
update_rlimit_cpu() converts the RLIMIT_CPU value to nanoseconds with
u64 nsecs = rlim_new * NSEC_PER_SEC;
On 32-bit kernels both rlim_new (unsigned long) and NSEC_PER_SEC
(1000000000L) are 32-bit, so the multiplication is performed in unsigned
long and truncated for rlim_new > 4 seconds before being widened to u64.
The same file already casts to u64 for the matching computation in
check_process_timers():
u64 softns = (u64)soft * NSEC_PER_SEC;
As a result, the truncated value is installed into the CPUCLOCK_PROF
expiry cache (nextevt), causing the process CPU timer to be programmed
to fire prematurely for any RLIMIT_CPU soft limit >= 5 seconds. The
actual SIGXCPU/SIGKILL decision in check_process_timers() already casts
to u64 and is therefore correct, so limit enforcement is not broken;
only the expiry-cache programming is wrong. Apply the same cast here so
both paths convert rlim_cur identically.
64-bit kernels are unaffected.
Fixes:
|
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Mikhail Gavrilov
|
8fa3082118 |
timekeeping: Register default clocksource before taking tk_core.lock
Commit |
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Linus Torvalds
|
66affa37cf |
audit/stable-7.2 PR 20260615
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||
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Linus Torvalds
|
5b33fc6492 |
sched_ext: Changes for v7.2
This depends on the BPF arena work in bpf-next and should be pulled after
it. for-7.1-fixes was merged in a few times to avoid conflicts with the
feature changes.
- Most of this continues the in-development sub-scheduler support, which
lets a root BPF scheduler delegate to nested sub-schedulers. The
dispatch-path building blocks landed in 7.1. A follow-up patchset in
development will complete enqueue-path support for hierarchical
scheduling. This cycle adds most of that infrastructure:
- Topological CPU IDs (cids): a dense, topology-ordered CPU numbering
where the CPUs of a core, LLC, or NUMA node form contiguous ranges,
so a topology unit becomes a (start, length) slice. Raw CPU numbers
are sparse and don't track topological closeness, which makes them
clumsy for sharding work across sub-schedulers and awkward in BPF.
- cmask: bitmaps windowed over a slice of cid space, so a sub-scheduler
can track, for example, the idle cids of its shard without a full
NR_CPUS cpumask.
- A struct_ops variant that cid-form sub-schedulers register with,
along with the cid-form kfuncs they call.
- BPF arena integration, which sub-scheduler support is built on. The
bpf-next additions let the kernel read and write the BPF scheduler's
arena directly, turning it into a real kernel/BPF shared-memory
channel. Shared state like the per-CPU cmask now lives there.
- scx_qmap is reworked to exercise the new arena and cid interfaces.
- Exit-dump improvements: dump the faulting CPU first, expose the exit
CPU to BPF and userspace, and normalize the dump header.
- Misc kfuncs and cleanups: a task-ID lookup kfunc, __printf checking on
the error and dump formatters, header reorganization, and assorted
fixes.
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Merge tag 'sched_ext-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
Pull sched_ext updates from Tejun Heo:
"Most of this continues the in-development sub-scheduler support, which
lets a root BPF scheduler delegate to nested sub-schedulers. The
dispatch-path building blocks landed in 7.1. A follow-up patchset in
development will complete enqueue-path support for hierarchical
scheduling. This cycle adds most of that infrastructure:
- Topological CPU IDs (cids): a dense, topology-ordered CPU numbering
where the CPUs of a core, LLC, or NUMA node form contiguous ranges,
so a topology unit becomes a (start, length) slice. Raw CPU numbers
are sparse and don't track topological closeness, which makes them
clumsy for sharding work across sub-schedulers and awkward in BPF.
- cmask: bitmaps windowed over a slice of cid space, so a
sub-scheduler can track, for example, the idle cids of its shard
without a full NR_CPUS cpumask.
- A struct_ops variant that cid-form sub-schedulers register with,
along with the cid-form kfuncs they call.
- BPF arena integration, which sub-scheduler support is built on. The
bpf-next additions let the kernel read and write the BPF
scheduler's arena directly, turning it into a real kernel/BPF
shared-memory channel. Shared state like the per-CPU cmask now
lives there.
- scx_qmap is reworked to exercise the new arena and cid interfaces.
Additionally:
- Exit-dump improvements: dump the faulting CPU first, expose the
exit CPU to BPF and userspace, and normalize the dump header.
- Misc kfuncs and cleanups: a task-ID lookup kfunc, __printf checking
on the error and dump formatters, header reorganization, and
assorted fixes"
* tag 'sched_ext-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: (59 commits)
sched_ext: Add scx_arena_to_kaddr() / scx_kaddr_to_arena()
sched_ext: Make scx_bpf_kick_cid() return s32
sched_ext: Add scx_cmask_test() and scx_cmask_for_each_cid()
tools/sched_ext: Order single-cid cmask helpers as (cid, mask)
sched_ext: Order single-cid cmask helpers as (cid, mask)
selftests/sched_ext: Fix dsq_move_to_local check
sched_ext: Guard BPF arena helper calls to fix 32-bit build
sched_ext: idle: Fix errno loss in scx_idle_init()
sched_ext: Convert ops.set_cmask() to arena-resident cmask
sched_ext: Sub-allocator over kernel-claimed BPF arena pages
sched_ext: Require an arena for cid-form schedulers
sched_ext: Add cmask mask ops
sched_ext: Track bits[] storage size in struct scx_cmask
sched_ext: Rename scx_cmask.nr_bits to nr_cids
tools/sched_ext: scx_qmap: Fix qa arena placement
sched_ext: Mark !CONFIG_EXT_SUB_SCHED dummy stubs static inline
sched_ext: Replace tryget_task_struct() with get_task_struct()
sched_ext: Add scx_task_iter_relock() and use it in scx_root_enable_workfn()
sched_ext: Fix ops_cid layout assert
sched_ext: Use offsetofend on both sides of the ops_cid layout assert
...
|
||
|
Linus Torvalds
|
83476cc97b |
cgroup: Changes for v7.2
- Last cycle deferred css teardown on cgroup removal until the cgroup depopulated, so a css is not taken offline while tasks can still reference it. Disabling a controller through cgroup.subtree_control still had the same problem. This reworks the deferral from per-cgroup to per-css so that path is covered too. - New RDMA controller monitoring files: rdma.peak for per-device peak usage and rdma.events / rdma.events.local for resource-limit exhaustion. The max-limit parser was rewritten, fixing two input parsing bugs. - cpuset: fix a sched-domain leak on the domain-rebuild failure path and skip a redundant hardwall ancestor scan on v2. - Misc: pair the remaining lockless cgroup.max.* reads with WRITE_ONCE, assorted selftest robustness fixes, and doc path corrections. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCajB0sw4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGTZQAPwJy730XnUGvLqSiNZT05xzoq6G16u0cC61/U0g t+yU3wEA4mvObdARiJufo+f3Nsg1NY0NzF82xrCS60EsY+rXCgQ= =H56K -----END PGP SIGNATURE----- Merge tag 'cgroup-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup updates from Tejun Heo: - Last cycle deferred css teardown on cgroup removal until the cgroup depopulated, so a css is not taken offline while tasks can still reference it. Disabling a controller through cgroup.subtree_control still had the same problem. This reworks the deferral from per-cgroup to per-css so that path is covered too. - New RDMA controller monitoring files: rdma.peak for per-device peak usage and rdma.events / rdma.events.local for resource-limit exhaustion. The max-limit parser was rewritten, fixing two input parsing bugs. - cpuset: fix a sched-domain leak on the domain-rebuild failure path and skip a redundant hardwall ancestor scan on v2. - Misc: pair the remaining lockless cgroup.max.* reads with WRITE_ONCE, assorted selftest robustness fixes, and doc path corrections. * tag 'cgroup-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (22 commits) cgroup: Migrate tasks to the root css when a controller is rebound docs: cgroup: Fix stale source file paths cgroup/cpuset: Free sched domains on rebuild guard failure cgroup: pair max limit READ_ONCE() with WRITE_ONCE() selftests/cgroup: enable memory controller in hugetlb memcg test cgroup/rdma: Drop unnecessary READ_ONCE() on event counters cgroup: Defer kill_css_finish() in cgroup_apply_control_disable() cgroup: Add per-subsys-css kill_css_finish deferral cgroup: Move populated counters to cgroup_subsys_state cgroup: Annotate unlocked nr_populated_* accesses with READ_ONCE/WRITE_ONCE cgroup: Inline cgroup_has_tasks() in cgroup.h cgroup/rdma: document rdma.peak, rdma.events and rdma.events.local cgroup/rdma: add rdma.events.local for per-cgroup allocation failure attribution cgroup/rdma: add rdma.events to track resource limit exhaustion cgroup/rdma: add rdma.peak for per-device peak usage tracking selftests/cgroup: check malloc return value in alloc_anon functions cgroup/cpuset: Skip hardwall ancestor scan in cpuset v2 in cpuset_current_node_allowed() selftests/cgroup: fix misleading debug message in test_cgfreezer_time_child selftests/cgroup: fix child process escaping to parent cleanup in test_cpucg_nice selftests/cgroup: Add NULL check after malloc in cgroup_util.c ... |
||
|
Linus Torvalds
|
d4d9d39f04 |
workqueue: Changes for v7.2
- Continued progress toward making alloc_workqueue() unbound by default:
more callers converted to WQ_PERCPU / system_percpu_wq / system_dfl_wq,
and new warnings for queues that use neither WQ_PERCPU nor WQ_UNBOUND
or the legacy system_wq / system_unbound_wq.
- Misc: drop the now-trivial apply_wqattrs_lock()/unlock() wrappers,
forbid the TEST_WORKQUEUE benchmark from being built-in, and fix a
spurious pointer level in the worker debug-dump path.
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Merge tag 'wq-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue updates from Tejun Heo:
- Continued progress toward making alloc_workqueue() unbound by
default: more callers converted to WQ_PERCPU / system_percpu_wq /
system_dfl_wq, and new warnings for queues that use neither WQ_PERCPU
nor WQ_UNBOUND or the legacy system_wq / system_unbound_wq.
- Misc: drop the now-trivial apply_wqattrs_lock()/unlock() wrappers,
forbid the TEST_WORKQUEUE benchmark from being built-in, and fix a
spurious pointer level in the worker debug-dump path.
* tag 'wq-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
drm/bridge: anx7625: Add WQ_PERCPU add to alloc_workqueue
wifi: ath6kl: fix invalid workqueue flags in ath6kl_usb_create()
btrfs: Drop WQ_PERCPU from ordered_flags in btrfs_init_workqueues()
workqueue: Add warnings and ensure one among WQ_PERCPU or WQ_UNBOUND is present
workqueue: Add warnings and fallback if system_{unbound}_wq is used
workqueue: drop spurious '*' from print_worker_info() fn declaration
workqueue: forbid TEST_WORKQUEUE from being built-in
workqueue: drop apply_wqattrs_lock()/unlock() wrappers
umh: replace use of system_unbound_wq with system_dfl_wq
rapidio: rio: add WQ_PERCPU to alloc_workqueue users
media: ddbridge: add WQ_PERCPU to alloc_workqueue users
platform: cznic: turris-omnia-mcu: replace use of system_wq with system_percpu_wq
media: synopsys: hdmirx: replace use of system_unbound_wq with system_dfl_wq
virt: acrn: Add WQ_PERCPU to alloc_workqueue users
|
||
|
Linus Torvalds
|
8479bb8c44 |
Modules changes for v7.2-rc1
- Add a missing return value check for module_extend_max_pages() to prevent a kernel oops on memory allocation failure. - Force sh_addr to 0 for architecture-specific module sections on arm, arm64, m68k, and riscv. This prevents non-zero section addresses when linking modules with ld.bfd -r, which may cause tools to misbehave and result in worse compressibility. - Replace pr_warn! with pr_warn_once! for set_param null pointer warnings in Rust abstractions, now that the _once variant is available. Note that as part of our maintainer rotation, Petr Pavlu will be taking over module subsystem pull requests for the next six months. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQSE9au1u/dCZerzchhaByWrOaGnegUCaiycUAAKCRBaByWrOaGn ekFVAP9dELwbhP0QjWFhewtSMDYXsvqyEMZ91XAc0DX84/8LVgD+MGIPkaH2rO+Q saUUE+X6zAYpug5pop/GtDpufPRrLwI= =0DZj -----END PGP SIGNATURE----- Merge tag 'modules-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux Pull modules updates from Sami Tolvanen: - Add a missing return value check for module_extend_max_pages() to prevent a kernel oops on memory allocation failure. - Force sh_addr to 0 for architecture-specific module sections on arm, arm64, m68k, and riscv. This prevents non-zero section addresses when linking modules with ld.bfd -r, which may cause tools to misbehave and result in worse compressibility. - Replace pr_warn! with pr_warn_once! for set_param null pointer warnings in Rust abstractions, now that the _once variant is available. * tag 'modules-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux: rust: module_param: add missing newline to pr_warn_once module: decompress: check return value of module_extend_max_pages() rust: module_param: use `pr_warn_once!` for null pointer warning module, riscv: force sh_addr=0 for arch-specific sections module, m68k: force sh_addr=0 for arch-specific sections module, arm64: force sh_addr=0 for arch-specific sections module, arm: force sh_addr=0 for arch-specific sections |
||
|
Linus Torvalds
|
9c87e61e3c |
bpf-next-7.2
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Merge tag 'bpf-next-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Pull bpf updates from Alexei Starovoitov:
"Major changes:
- Recover from BPF arena page faults using a scratch page and add
ptep_try_set() for lockless empty-slot installs on x86 and arm64.
This allows BPF kfuncs to access arena pointers directly.
The 'arena_direct_access' stable branch was created for this work
and was pulled into sched-ext and bpf-next trees (Tejun Heo, Kumar
Kartikeya Dwivedi)
- Lift old restriction and support 6+ arguments in BPF programs and
kfuncs on x86 and arm64 (Yonghong Song, Puranjay Mohan)
Other features and fixes:
- Add 24-bit BTF vlen and reclaim unused bits in the BTF UAPI to ease
addition of new BTF kinds (Alan Maguire)
- Raise the maximum BPF call chain depth from 8 to 16 frames (Alexei
Starovoitov)
- Refactor object relationship tracking in the verifier and fix a
dynptr use-after-free bug (Amery Hung)
- Harden the signed program loader and reject exclusive maps as inner
maps (Daniel Borkmann)
- Replace the verifier min/max bounds fields with a circular number
(cnum) representation and improve 32->64 bit range refinements
(Eduard Zingerman)
- Introduce the arena library and runtime (libarena) with a buddy
allocator, rbtree and SPMC queue data structures, ASAN support and
a parallel test harness. Allow subprograms to return arena pointers
and switch to a BTF type-tag based __arena annotation (Emil
Tsalapatis)
- Cache build IDs in the sleepable stackmap path and avoid faultable
build ID reads under mm locks (Ihor Solodrai)
- Introduce the tracing_multi link to attach a single BPF program to
many kernel functions at once. Allow specifying the uprobe_multi
target via FD (Jiri Olsa)
- Extend the bpf_list family of kfuncs with bpf_list_add/del(), and
bpf_list_is_first/is_last/empty() (Kaitao Cheng)
- Extend the BPF syscall with common attributes support for
prog_load, btf_load and map_create (Leon Hwang)
- Wrap rhashtable as BPF map (Mykyta Yatsenko, Herbert Xu)
- Add sleepable support for tracepoint programs and fix deadlocks in
LRU map due to NMI reentry (Mykyta Yatsenko)
- Fix OOB access in bpf_flow_keys, fix nullness analysis of inner
arrays, enforce write checks for global subprograms (Nuoqi Gui)
- Report the maximum combined stack depth and print a breakdown of
instructions processed per subprogram (Paul Chaignon)
- Add an XDP load-balancer benchmark and arm64 JIT support for stack
arguments (Puranjay Mohan)
- Add kfuncs to traverse over wakeup_sources (Samuel Wu)
- Allow sleepable BPF programs to use LPM trie maps directly (Vlad
Poenaru)
- Many more fixes and cleanups across the verifier, BTF, sockmap,
devmap, bpffs, security hooks, s390/riscv/loongarch JITs,
rqspinlock, libbpf, bpftool, selftests"
* tag 'bpf-next-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (336 commits)
selftests/bpf: Work around llvm stack overflow in crypto progs
selftests/bpf: add test for bpf_msg_pop_data() overflow
bpf, sockmap: fix integer overflow in bpf_msg_pop_data() bounds check
sockmap: Fix use-after-free in udp_bpf_recvmsg()
bpf, sockmap: keep sk_msg copy state in sync
bpf, sockmap: Fix wrong rsge offset in bpf_msg_push_data()
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
selftsets/bpf: Retry map update on helper_fill_hashmap()
selftests/bpf: Add test for sleepable lsm_cgroup rejection
selftests/bpf: Add test to verify the fix for bpf_setsockopt() helper
bpf: Fix bpf_get/setsockopt to tos for ipv4-mapped ipv6 socket
selftests/bpf: Avoid static LLVM linking for cross builds
selftests/bpf: Use common CFLAGS for urandom_read
selftests/bpf: Initialize operation name before use
tools/bpf: build: Append extra cflags
libbpf: Initialize CFLAGS before including Makefile.include
bpftool: Append extra host flags
bpftool: Avoid adding EXTRA_CFLAGS to HOST_CFLAGS
bpftool: Pass host flags to bootstrap libbpf
selftests/bpf: correct CONFIG_PPC64 macro name in comment
...
|
||
|
Alexander Gordeev
|
9fb519794e |
Merge branch 'idle-time-acc' into features
Heiko Carstens says: =================== This is supposed to improve s390 idle time accounting, and brings it back to the state it was before arch_cpu_idle_time() was removed from s390 [3]. In result all cpu time accounting is done by the s390 architecture backend again, instead of having a mix of architecure specific and common code accounting (common code: idle, s390 architecture: everything else). =================== Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> |
||
|
Linus Torvalds
|
c071a4fbb0 |
tracing latency updates for 7.2:
- Dump the stack to the buffer on timerlat uret threashold event Record the stack trace in the buffer for THREAD_URET as well as THREAD_CONTEXT when the threshold is hit. Otherwise, if the threshold was not hit at task wakeup, but was at task return, it will not produce a stack trace making it harder to debug. - Have osnoise trace prints print to all buffers The osnoise tracer is allowed to print to the main buffer. Add a osnoise_print() helper function and use trace_array_vprintk() to print osnoise output. -----BEGIN PGP SIGNATURE----- iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCajDrBBQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qgpwAQDmFBFP3dU6LiGp6U3UTYauAApah401 zXfmNxbGFO5rmwEAxIHCzoG3OZgrjrYhrkW9qBZDho7+1Frt7vphK71fYAE= =0ayh -----END PGP SIGNATURE----- Merge tag 'trace-latency-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing latency updates from Steven Rostedt: - Dump the stack to the buffer on timerlat uret threashold event Record the stack trace in the buffer for THREAD_URET as well as THREAD_CONTEXT when the threshold is hit. Otherwise, if the threshold was not hit at task wakeup, but was at task return, it will not produce a stack trace making it harder to debug. - Have osnoise trace prints print to all buffers The osnoise tracer is allowed to print to the main buffer. Add a osnoise_print() helper function and use trace_array_vprintk() to print osnoise output. * tag 'trace-latency-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing/osnoise: Array printk init and cleanup tracing/osnoise: Dump stack on timerlat uret threshold event |
||
|
Linus Torvalds
|
18ecdd4d0a |
Probes updates for v7.2
- eprobes: BTF support for dereferencing pointers
. tracing/eprobes: Allow use of BTF names to dereference pointers. Add syntax
to the parsing of eprobes to typecast structure pointer trace event fields,
enabling BTF-based dereferencing instead of relying on manual offsets.
- probes: Improvements and robustness enhancements
. tracing: Use flexible array for entry fetch code. Store probe entry fetch
instructions in the probe_entry_arg allocation via a flexible array
member to simplify memory allocation and lifetime management.
. tracing: Replace BUG_ON with lockdep_assert_held in uprobe_buffer functions.
Replace BUG_ON() calls with lockdep_assert_held() in uprobe buffer
enable/disable paths to prevent kernel crashes and better verify lock ownership.
. tracing/probes: Ensure the uprobe buffer size is bigger than event size.
Add a BUILD_BUG_ON() assertion to guarantee that the per-CPU uprobe
working buffer size is always larger than the maximum probe event size.
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Merge tag 'probes-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes updates from Masami Hiramatsu:
- BTF support for dereferencing pointers
Add syntax to the parsing of eprobes to typecast structure pointer
trace event fields, enabling BTF-based dereferencing instead of
relying on manual offsets.
- Improvements and robustness enhancements
- Use flexible array for entry fetch code.
Store probe entry fetch instructions in the probe_entry_arg
allocation via a flexible array member to simplify memory
allocation and lifetime management.
- Replace BUG_ON with lockdep_assert_held in uprobe_buffer functions
Replace BUG_ON() calls with lockdep_assert_held() in uprobe buffer
enable/disable paths to prevent kernel crashes and better verify
lock ownership.
- Ensure the uprobe buffer size is bigger than event size.
Add a BUILD_BUG_ON() assertion to guarantee that the per-CPU
uprobe working buffer size is always larger than the maximum probe
event size.
* tag 'probes-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing/eprobes: Allow use of BTF names to dereference pointers
tracing: Replace BUG_ON with lockdep_assert_held in uprobe_buffer functions
tracing: Use flexible array for entry fetch code
tracing/probes: Ensure the uprobe buffer size is bigger than event size
|
||
|
Linus Torvalds
|
42eb3a5ef6 |
linux_kselftest-kunit-7.2-rc1
Fixes to tool and kunit core and new features to both to support JUnit XML (primitive) and backtrace suppression API: - bug/kunit: Core support for suppressing warning backtraces - kunit: tool: Parse and print the reason tests are skipped - kunit: tool: Add (primitive) support for outputting JUnit XML - kunit:tool: Don't write to stdout when it should be disabled - kunit: Add backtrace suppression self-tests - drm: Suppress intentional warning backtraces in scaling unit tests - kunit: Add documentation for warning backtrace suppression API - kunit: Fix spelling mistakes in comments and messages - gen_compile_commands: Ignore libgcc.a - kunit: qemu_configs: Add or1k / openrisc configuration -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAmowHNQACgkQCwJExA0N QxxjdQ/+MibsF3MON3LIOPC2/p23zoAv+jDkw4gxYWC3L9Wh3gqsZLUuYwyGc8Xn hO9xN7PEXressO4kukveWYnNtt//aXL3gnZ6Zysbt/BCO73LPxy1IGITDFL58ZVT F12ym07VsbqQIHMXR+ANJfxCE8RuaPzdkSW635sLQAhpB5W1Fb51XXfStbLswrVN iX8XNnOYGjBES8nDiwFKPCtgwvp19XN4B51iSo3XWU8nhcrrBxrk0ToWfyQVwEA0 T87hRL81cHLH4WREw1lwEVQ+lRY5WGBwQsKB2JFmI3HaTwcHbNY8p1sa/YARspmY LFCRLZu/KLio0a4ZxaVq690JCeQ2osgBhCvF9B/sxtc90/kYM5QycpnmpdgyPBZq v0vEnFBG7nAj1epHvmt/S2z11oTpdDbkuTZIEDvW/wsI82wbB6kAkzMY30BRitSJ E+RLZxTtSIovI44BgFVFypVWRa2XMaCKL2+GGZoIJiGUwCeJZSTs1nKtnkhYuhel daHosU85uB6GFnKE1L8LVJ+Vii+iOZUXN9F4B+2vCJ+eXm/0t85yIm5zEmTpKvNu sS8c3KRIkK5kSRitKJtUpiuxUQtPaJCA/w2B9FdPx5+yHmHa+Em3JUn8ZuM1ZRem lNIy1b0gM+kJvGT8ZN1eNDSwrHrC+cJ3RI4AeBYPcJ2ECnFvTYI= =nc4g -----END PGP SIGNATURE----- Merge tag 'linux_kselftest-kunit-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kunit updates from Shuah Khan: "Fixes to tool and kunit core and new features to both to support JUnit XML (primitive) and backtrace suppression API: - Core support for suppressing warning backtraces - Parse and print the reason tests are skipped - Add (primitive) support for outputting JUnit XML - Don't write to stdout when it should be disabled - Add backtrace suppression self-tests - Suppress intentional warning backtraces in scaling unit tests - Add documentation for warning backtrace suppression API - Fix spelling mistakes in comments and messages - gen_compile_commands: Ignore libgcc.a - qemu_configs: Add or1k / openrisc configuration" * tag 'linux_kselftest-kunit-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: kunit:tool: Don't write to stdout when it should be disabled kunit: tool: Add (primitive) support for outputting JUnit XML kunit: tool: Parse and print the reason tests are skipped kunit: Add documentation for warning backtrace suppression API drm: Suppress intentional warning backtraces in scaling unit tests kunit: Add backtrace suppression self-tests bug/kunit: Core support for suppressing warning backtraces kunit: Fix spelling mistakes in comments and messages kunit: qemu_configs: Add or1k / openrisc configuration gen_compile_commands: Ignore libgcc.a |
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Linus Torvalds
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f8115f0e8a |
slab changes for 7.2
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Heiko Carstens
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670e057744 |
s390/idle: Provide arch specific kcpustat_field_idle()/kcpustat_field_iowait()
The former s390 specific arch_cpu_idle_time() implementation was removed, since its implementation was racy and reported idle time could go backwards [1]. However this removal was not necessary, since independently of the s390 architecture specific races there exists the iowait counter update race, which can also lead to reported idle time going backwards [2]. With Frederic Weisbecker's recent cpu idle time accounting refactoring kernel_cpustat got a sequence counter. Use this to implement s390 specific variants of kcpustat_field_idle() and kcpustat_field_iowait(). This is logically a revert of [1] and moves cpu idle time accounting back into s390 architecture code, which is also more precise than the dyntick idle time accounting by nohz/scheduler. For comparing cross cpu time stamps it is necessary to use the stcke instead of the stckf instruction in irq entry path. Furthermore this open-codes a sequence lock in assembler and C code, which is required to update the irq entry time stamp to the per cpu idle_data structure in a race free manner. [1] commit |