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36808d5e98
51905 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
36808d5e98 |
Driver core changes for 7.2-rc1
- deferred probe:
- Fix race where deferred probe timeout work could be permanently
canceled by using mod_delayed_work()
- Fix missing jiffies conversion in deferred_probe_extend_timeout()
- Guard timeout extension with delayed_work_pending() to prevent
premature firing
- Use system_percpu_wq instead of the deprecated system_wq
- Update deferred_probe_timeout documentation
- device:
- Replace direct struct device bitfield access (can_match, dma_iommu,
dma_skip_sync, dma_ops_bypass, state_synced, dma_coherent,
of_node_reused, offline, offline_disabled) with flag-based
accessors using bit operations
- Reject devices with unregistered buses
- Delete unused DEVICE_ATTR_PREALLOC()
- Add low-level device attribute macros with const show/store
callbacks, allowing device attributes to reside in read-only memory
- Move core device attributes to read-only memory
- Constify group array pointers in driver_add_groups() /
driver_remove_groups(), struct bus_type, and struct device_driver
- device property:
- Fix fwnode reference leak in fwnode_graph_get_endpoint_by_id()
- Initialize all fields of fwnode_handle in fwnode_init()
- Provide swnode_get()/swnode_put() wrappers around kobject_get/put()
- Allow passing struct software_node_ref_args pointers directly to
PROPERTY_ENTRY_REF()
- driver_override:
- Migrate amba, cdx, vmbus, and rpmsg to the generic driver_override
infrastructure, fixing a UAF from unsynchronized access to
driver_override in bus match() callbacks
- Remove the now-unused driver_set_override()
- firmware loader:
- Fix recursive lock deadlock in device_cache_fw_images() when async
work falls back to synchronous execution
- Fix device reference leak in firmware_upload_register()
- platform:
- Pass KBUILD_MODNAME through the platform driver registration macro
to create module symlinks in sysfs for built-in drivers; move
module_kset initialization to a pure_initcall and tegra cbb
registration to core_initcall to ensure correct ordering
- Pass THIS_MODULE implicitly through a coresight_init_driver() macro
- sysfs:
- Upgrade OOB write detection in sysfs_kf_seq_show() from printk to
WARN
- Add return value clamping to sysfs_kf_read()
- Rust:
- ACPI:
- Fix missing match data for PRP0001 by exporting
acpi_of_match_device()
- Auxiliary:
- Replace drvdata() with dedicated registration data on
auxiliary_device. drvdata() exposed the driver's bus device
private data beyond the driver's own scope, creating ordering
constraints and forcing the data to outlive all registrations
that access it. Registration data is instead scoped structurally
to the Registration object, making lifecycle ordering enforced
by construction rather than convention.
- Rust-native device driver lifetimes (HRT):
- Allow Rust device drivers to carry a lifetime parameter on their
bus device private data, tied to the device binding scope -- the
interval during which a bus device is bound to a driver. Device
resources like pci::Bar<'a> and IoMem<'a> can be stored directly
in the driver's bus device private data with a lifetime bounded
by the binding scope, so the compiler enforces at build time that
they do not outlive the binding. This removes Devres indirection
from every access site and eliminates try_access() failure paths
in destructors.
Bus driver traits use a Generic Associated Type (GAT)
Data<'bound> to introduce the lifetime on the private data,
rather than parameterizing the Driver trait itself. Auxiliary
registration data, where the lifetime is not introduced by a
trait callback but must be threaded through Registration, uses
the ForLt trait (a type-level abstraction for types generic over
a lifetime).
- Misc:
- Fix DT overlayed devices not probing by reverting the broken
treewide overlay fix and re-running fw_devlink consumer pickup when
an overlay is applied to a bound device
- Use root_device_register() for faux bus root device; add sanity
check for failed bus init
- Fix dev_has_sync_state() data race with READ_ONCE() and move it to
base.h
- Avoid spurious device_links warning when removing a device while
its supplier is unbinding
- Switch ISA bus to dynamic root device
- Fix suspicious RCU usage in kernfs_put()
- Remove devcoredump exit callback
- Constify devfreq_event_class
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Merge tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core updates from Danilo Krummrich:
"Deferred probe:
- Fix race where deferred probe timeout work could be permanently
canceled by using mod_delayed_work()
- Fix missing jiffies conversion in deferred_probe_extend_timeout()
- Guard timeout extension with delayed_work_pending() to prevent
premature firing
- Use system_percpu_wq instead of the deprecated system_wq
- Update deferred_probe_timeout documentation
device:
- Replace direct struct device bitfield access (can_match, dma_iommu,
dma_skip_sync, dma_ops_bypass, state_synced, dma_coherent,
of_node_reused, offline, offline_disabled) with flag-based
accessors using bit operations
- Reject devices with unregistered buses
- Delete unused DEVICE_ATTR_PREALLOC()
- Add low-level device attribute macros with const show/store
callbacks, allowing device attributes to reside in read-only memory
- Move core device attributes to read-only memory
- Constify group array pointers in driver_add_groups() /
driver_remove_groups(), struct bus_type, and struct device_driver
device property:
- Fix fwnode reference leak in fwnode_graph_get_endpoint_by_id()
- Initialize all fields of fwnode_handle in fwnode_init()
- Provide swnode_get()/swnode_put() wrappers around kobject_get/put()
- Allow passing struct software_node_ref_args pointers directly to
PROPERTY_ENTRY_REF()
driver_override:
- Migrate amba, cdx, vmbus, and rpmsg to the generic driver_override
infrastructure, fixing a UAF from unsynchronized access to
driver_override in bus match() callbacks
- Remove the now-unused driver_set_override()
firmware loader:
- Fix recursive lock deadlock in device_cache_fw_images() when async
work falls back to synchronous execution
- Fix device reference leak in firmware_upload_register()
platform:
- Pass KBUILD_MODNAME through the platform driver registration macro
to create module symlinks in sysfs for built-in drivers; move
module_kset initialization to a pure_initcall and tegra cbb
registration to core_initcall to ensure correct ordering
- Pass THIS_MODULE implicitly through a coresight_init_driver() macro
sysfs:
- Upgrade OOB write detection in sysfs_kf_seq_show() from printk to
WARN
- Add return value clamping to sysfs_kf_read()
Rust:
- ACPI:
Fix missing match data for PRP0001 by exporting
acpi_of_match_device()
- Auxiliary:
Replace drvdata() with dedicated registration data on
auxiliary_device. drvdata() exposed the driver's bus device private
data beyond the driver's own scope, creating ordering constraints
and forcing the data to outlive all registrations that access it.
Registration data is instead scoped structurally to the
Registration object, making lifecycle ordering enforced by
construction rather than convention.
- Rust-native device driver lifetimes (HRT):
Allow Rust device drivers to carry a lifetime parameter on their
bus device private data, tied to the device binding scope -- the
interval during which a bus device is bound to a driver. Device
resources like pci::Bar<'a> and IoMem<'a> can be stored directly in
the driver's bus device private data with a lifetime bounded by the
binding scope, so the compiler enforces at build time that they do
not outlive the binding. This removes Devres indirection from every
access site and eliminates try_access() failure paths in
destructors.
Bus driver traits use a Generic Associated Type (GAT) Data<'bound>
to introduce the lifetime on the private data, rather than
parameterizing the Driver trait itself. Auxiliary registration
data, where the lifetime is not introduced by a trait callback but
must be threaded through Registration, uses the ForLt trait (a
type-level abstraction for types generic over a lifetime).
Misc:
- Fix DT overlayed devices not probing by reverting the broken
treewide overlay fix and re-running fw_devlink consumer pickup when
an overlay is applied to a bound device
- Use root_device_register() for faux bus root device; add sanity
check for failed bus init
- Fix dev_has_sync_state() data race with READ_ONCE() and move it to
base.h
- Avoid spurious device_links warning when removing a device while
its supplier is unbinding
- Switch ISA bus to dynamic root device
- Fix suspicious RCU usage in kernfs_put()
- Remove devcoredump exit callback
- Constify devfreq_event_class"
* tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core: (81 commits)
software node: allow passing reference args to PROPERTY_ENTRY_REF()
driver core: platform: set mod_name in driver registration
coresight: pass THIS_MODULE implicitly through a macro
kernel: param: initialize module_kset in a pure_initcall
soc/tegra: cbb: Move driver registration from pure_initcall to core_initcall
firmware_loader: Fix recursive lock in device_cache_fw_images()
driver core: Use system_percpu_wq instead of system_wq
driver core: remove driver_set_override()
rpmsg: use generic driver_override infrastructure
Drivers: hv: vmbus: use generic driver_override infrastructure
cdx: use generic driver_override infrastructure
amba: use generic driver_override infrastructure
rust: devres: add 'static bound to Devres<T>
samples: rust: rust_driver_auxiliary: showcase lifetime-bound registration data
rust: auxiliary: generalize Registration over ForLt
rust: types: add `ForLt` trait for higher-ranked lifetime support
gpu: nova-core: separate driver type from driver data
samples: rust: rust_driver_pci: use HRT lifetime for Bar
rust: io: make IoMem and ExclusiveIoMem lifetime-parameterized
rust: pci: make Bar lifetime-parameterized
...
|
||
|
Linus Torvalds
|
5504ce0317 |
Power management updates for 7.2-rc1
- Fix a race between cpufreq suspend and CPU hotplug during system
shutdown (Tianxiang Chen)
- Avoid redundant target() calls for unchanged limits and fix a typo
in a comment in the cpufreq core (Viresh Kumar)
- Fix concurrency issues related to sysfs attributes access that affect
cpufreq governors using the common governor code (Zhongqiu Han)
- Simplify frequency limit handling in the conservative cpufreq
governor (Lifeng Zheng)
- Fix descriptions of the conservative governor freq_step tunable and
the ondemand governor sampling_down_factor tunable in the cpufreq
documentation (Pengjie Zhang)
- Fix use-after-free and double free during _OSC evaluation in the PCC
cpufreq driver (Yuho Choi)
- Rework the handling of policy min and max frequency values in the
cpufreq core to allow drivers to specify special initial values for
the scaling_min_freq and scaling_max_freq sysfs attributes (Pierre
Gondois)
- Add cpufreq scaling support for Qualcomm Shikra SoC (Taniya Das,
Imran Shaik).
- Improve the warning message on HWP-disabled hybrid processors printed
by the intel_pstate driver and sync policy->cur during CPU offline in
it (Yohei Kojima, Fushuai Wang)
- Drop cpufreq support for AMD Elan SC4* (Sean Young)
- Minor fixes for cpufreq drivers (Krzysztof Kozlowski, Akashdeep Kaur,
Hans Zhang, Guangshuo Li, Xueqin Luo)
- Clean up dead dependencies on X86 in the cpufreq Kconfig (Julian
Braha)
- Allow the intel_idle driver to avoid exposing C-states that are
redundant when PC6 is disabled (Artem Bityutskiy)
- Fix memory leak and a potential race in the OPP core (Abdun Nihaal,
Di Shen)
- Mark Rust OPP methods as inline (Nicolás Antinori)
- Fix misc device registration failure path in the PM QoS core (Yuho
Choi)
- Add sysctl interface for DPM watchdog timeouts (Tzung-Bi Shih)
- Use complete() instead of complete_all() in device_pm_sleep_init() to
avoid a false-positive warning from lockdep_assert_RT_in_threaded_ctx()
when CONFIG_PROVE_RAW_LOCK_NESTING is enabled (Jiakai Xu)
- Use a flexible array for CRC uncompressed buffers during hibernation
image saving (Rosen Penev)
- Make the LZ4 algorithm available for hibernation compression (l1rox3)
- Move the preallocate_image() call during hibernation after the
"prepare" phase of the "freeze" transition (Matthew Leach)
- Fix a memory leak in rapl_add_package_cpuslocked() in the intel_rapl
power capping driver and use sysfs_emit() in cpumask_show() in that
driver (Sumeet Pawnikar, Yury Norov)
- Fix ValueError when parsing incomplete device properties in the
pm-graph utility (Gongwei Li)
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Merge tag 'pm-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"Over a half of the changes here are cpufreq updates that include core
modifications, fixes of the old-style governors, new hardware support
in drivers, assorded driver fixes and cleanups, and the removal of one
driver (AMD Elan SC4*).
Apart from that, the intel_idle driver will now be able to avoid
exposing redundant C-states if PC6 is disabled and there are new
sysctl knobs for device suspend/resume watchdog timeouts, hibernation
gets built-in LZ4 support for image compression and there is the usual
collection of assorted fixes and cleanups.
Specifics:
- Fix a race between cpufreq suspend and CPU hotplug during system
shutdown (Tianxiang Chen)
- Avoid redundant target() calls for unchanged limits and fix a typo
in a comment in the cpufreq core (Viresh Kumar)
- Fix concurrency issues related to sysfs attributes access that
affect cpufreq governors using the common governor code (Zhongqiu
Han)
- Simplify frequency limit handling in the conservative cpufreq
governor (Lifeng Zheng)
- Fix descriptions of the conservative governor freq_step tunable and
the ondemand governor sampling_down_factor tunable in the cpufreq
documentation (Pengjie Zhang)
- Fix use-after-free and double free during _OSC evaluation in the
PCC cpufreq driver (Yuho Choi)
- Rework the handling of policy min and max frequency values in the
cpufreq core to allow drivers to specify special initial values for
the scaling_min_freq and scaling_max_freq sysfs attributes (Pierre
Gondois)
- Add cpufreq scaling support for Qualcomm Shikra SoC (Taniya Das,
Imran Shaik).
- Improve the warning message on HWP-disabled hybrid processors
printed by the intel_pstate driver and sync policy->cur during CPU
offline in it (Yohei Kojima, Fushuai Wang)
- Drop cpufreq support for AMD Elan SC4* (Sean Young)
- Minor fixes for cpufreq drivers (Krzysztof Kozlowski, Akashdeep
Kaur, Hans Zhang, Guangshuo Li, Xueqin Luo)
- Clean up dead dependencies on X86 in the cpufreq Kconfig (Julian
Braha)
- Allow the intel_idle driver to avoid exposing C-states that are
redundant when PC6 is disabled (Artem Bityutskiy)
- Fix memory leak and a potential race in the OPP core (Abdun Nihaal,
Di Shen)
- Mark Rust OPP methods as inline (Nicolás Antinori)
- Fix misc device registration failure path in the PM QoS core (Yuho
Choi)
- Add sysctl interface for DPM watchdog timeouts (Tzung-Bi Shih)
- Use complete() instead of complete_all() in device_pm_sleep_init()
to avoid a false-positive warning from lockdep_assert_RT_in_threaded_ctx()
when CONFIG_PROVE_RAW_LOCK_NESTING is enabled (Jiakai Xu)
- Use a flexible array for CRC uncompressed buffers during
hibernation image saving (Rosen Penev)
- Make the LZ4 algorithm available for hibernation compression
(l1rox3)
- Move the preallocate_image() call during hibernation after the
"prepare" phase of the "freeze" transition (Matthew Leach)
- Fix a memory leak in rapl_add_package_cpuslocked() in the
intel_rapl power capping driver and use sysfs_emit() in
cpumask_show() in that driver (Sumeet Pawnikar, Yury Norov)
- Fix ValueError when parsing incomplete device properties in the
pm-graph utility (Gongwei Li)"
* tag 'pm-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/rafael/linux-pm: (40 commits)
PM: dpm_watchdog: Add sysctl interface for DPM watchdog timeouts
PM: QoS: Fix misc device registration unwind
cpufreq: Use policy->min/max init as QoS request
cpufreq: Remove driver default policy->min/max init
cpufreq: Set default policy->min/max values for all drivers
cpufreq: Extract cpufreq_policy_init_qos() function
cpufreq: Documentation: fix conservative governor freq_step description
cpufreq: ti: Add EPROBE_DEFER for K3 SoCs
cpufreq: qcom: Add cpufreq scaling support for Qualcomm Shikra SoC
dt-bindings: cpufreq: Document Qualcomm Shikra SoC EPSS
powercap: intel_rapl: Use sysfs_emit() in cpumask_show()
cpufreq: governor: Fix stale prev_cpu_nice spike when enabling ignore_nice_load
cpufreq: governor: Fix data races on per-CPU idle/nice baselines
PM: hibernate: Use flexible array for CRC uncompressed buffers
powercap: intel_rapl: Fix memory leak in rapl_add_package_cpuslocked()
PM: hibernate: make LZ4 available for hibernation compression
PM: sleep: Use complete() in device_pm_sleep_init()
opp: rust: mark OPP methods as inline
cpufreq: intel_pstate: Improve warning message on HWP-disabled hybrid CPUs
cpufreq: elanfreq: Drop support for AMD Elan SC4*
...
|
||
|
Linus Torvalds
|
b8b674748f |
RCU pull request for v7.2
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Merge tag 'rcu.release.v7.2' of gitolite.kernel.org:pub/scm/linux/kernel/git/rcu/linux
Pull RCU updates from Uladzislau Rezki:
"Torture test updates:
- Improve kvm-series.sh script by adding examples in its header
comment
- Lazy RCU is more fully tested now by replacing call_rcu_hurry()
with call_rcu() and doing rcu_barrier() to motivate lazy callbacks
during a stutter pause
- Add more synonyms for the "--do-normal" group of torture.sh
command-line arguments
Misc changes:
- Reduce stack usage of nocb_gp_wait() to address frame size warning
when built with CONFIG_UBSAN_ALIGNMENT
- The synchronize_rcu() call can detect the flood and latches a
normal/default path temporary switching to wait_rcu_gp() path
- Document using rcu_access_pointer() to fetch the old pointer for
lockless cmpxchg() updates
- Simplify some RCU code using clamp_val()
- Fix a kerneldoc header comment typo in srcu_down_read_fast()"
* tag 'rcu.release.v7.2' of gitolite.kernel.org:pub/scm/linux/kernel/git/rcu/linux:
rcu/nocb: reduce stack usage in nocb_gp_wait()
rcu-tasks: Fix possible boot-time tests failed for the call_rcu_tasks()
rcu: Latch normal synchronize_rcu() path on flood
rcu: Document rcu_access_pointer() feeding into cmpxchg()
rcu: Simplify param_set_next_fqs_jiffies() by applying clamp_val()
rcu: Simplify rcu_do_batch() by applying clamp()
checkpatch: Undeprecate rcu_read_lock_trace() and rcu_read_unlock_trace()
srcu: Fix kerneldoc header comment typo in srcu_down_read_fast()
torture: Allow "norm" abbreviation for "normal"
torture: Improve kvm-series.sh header comment
torture: Add torture_sched_set_normal() for user-specified nice values
rcutorture: Fully test lazy RCU
|
||
|
Linus Torvalds
|
79169a1624 |
vfs-7.2-rc1.procfs
Please consider pulling these changes from the signed vfs-7.2-rc1.procfs tag.
Thanks!
Christian
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Merge tag 'vfs-7.2-rc1.procfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull procfs updates from Christian Brauner:
- Revamp fs/filesystems.c
The file was a mess with a hand-rolled linked list in desperate need
of a cleanup. The filesystems list is now RCU-ified, /proc files can
be marked permanent from outside fs/proc/, and the string emitted
when reading /proc/filesystems is pre-generated and cached instead of
pointer-chasing and printfing entry by entry on every read.
The file is read frequently because libselinux reads it and is linked
into numerous frequently used programs (even ones you would not
suspect, like sed!). Scalability also improves since reference
maintenance on open/close is bypassed.
open+read+close cycle single-threaded (ops/s):
before: 442732
after: 1063462 (+140%)
open+read+close cycle with 20 processes (ops/s):
before: 606177
after:
|
||
|
Linus Torvalds
|
ff8747aaca |
vfs-7.2-rc1.xattr
Please consider pulling these changes from the signed vfs-7.2-rc1.xattr tag. Thanks! Christian -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCaiwLKgAKCRCRxhvAZXjc oiWnAP9ij5MDXEBgslxe/8YzPbyUjIO9qnEJtkGEzL1Z7cyFyAEA8+iAcs8bZmr7 Pzq0A5x3aK17V+34QkgfRiDTjkv0BgY= =xACw -----END PGP SIGNATURE----- Merge tag 'vfs-7.2-rc1.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull simple_xattr updates from Christian Brauner: "This reworks the simple xattr api to make it more efficient and easier to use for all consumers. The simple_xattr hash table moves from the inode into a per-superblock cache, removing the per-inode overhead for the common case of few or no xattrs. The interface now passes struct simple_xattrs ** so lazy allocation is handled internally instead of by every caller, kernfs xattr operations on kernfs nodes shared between multiple superblocks are properly serialized, and tmpfs constructs "security.foo" xattr names with kasprintf() instead of kmalloc() plus two memcpy()s. A follow-up fix links kernfs nodes to their parent before the LSM init hook runs: with the per-sb cache kernfs_xattr_set() computes the cache via kernfs_root(kn), which faulted on a freshly allocated node when selinux_kernfs_init_security() called into it - reproducible as a NULL pointer dereference on the first cgroup mkdir on SELinux-enabled systems. On top of this bpffs gains support for trusted.* and security.* xattrs so that user space and BPF LSM programs can attach metadata - for example a content hash or a security label - to pinned objects and directories and inspect it uniformly like on other filesystems. The store is in-memory and non-persistent, living only for the lifetime of the mount like everything else in bpffs" * tag 'vfs-7.2-rc1.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: bpf: Add simple xattr support to bpffs kernfs: link kn to its parent before the LSM init hook simpe_xattr: use per-sb cache simple_xattr: change interface to pass struct simple_xattrs ** tmpfs: simplify constructing "security.foo" xattr names kernfs: fix xattr race condition with multiple superblocks |
||
|
Linus Torvalds
|
9c9e6bd4cc |
kernel-7.2-rc1.task_exec_state
Please consider pulling these changes from the signed kernel-7.2-rc1.task_exec_state tag.
Thanks!
Christian
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Merge tag 'kernel-7.2-rc1.task_exec_state' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull task_exec_state updates from Christian Brauner:
"This introduces a new per-task task_exec_state structure and relocates
the dumpable mode and the user namespace captured at execve() from
mm_struct onto it. It stays attached to the task for its full
lifetime.
__ptrace_may_access() and several /proc owner and visibility checks
need to consult two pieces of state for any observable task, including
zombies that have already gone through exit_mm(): the dumpable mode
and the user namespace captured at execve(). Both live on mm_struct
today, which exit_mm() clears from the task long before the task is
reaped. A reader that races with do_exit() observes task->mm == NULL
and either fails the check or falls back to init_user_ns - which
denies legitimate access to non-dumpable zombies that were running in
a nested user namespace.
mm_struct loses ->user_ns and the dumpability bits in ->flags.
MMF_DUMPABLE_BITS is reserved so the MMF_DUMP_FILTER_* layout exposed
via /proc/<pid>/coredump_filter stays stable. task->user_dumpable and
its exit_mm() snapshot are removed.
task_exec_state is the privilege domain established by an execve().
Within a thread group it is shared via refcount; across thread groups
each task has its own:
- CLONE_VM siblings (thread-group members, io_uring workers)
refcount-share the parent's exec_state.
- Non-CLONE_VM clones (fork(), vfork() without CLONE_VM) allocate a
fresh exec_state inheriting the parent's dumpable mode and user_ns.
- execve() in the child allocates a fresh instance and installs it
under task_lock + exec_update_lock via task_exec_state_replace().
- Credential changes (setresuid, capset, ...) and
prctl(PR_SET_DUMPABLE) update dumpability on the current task's
exec_state, i.e., on the thread group's shared instance.
On top of this exec_mmap() no longer tears down the old mm while
holding exec_update_lock for writing and cred_guard_mutex. Neither
lock is needed for that: exec_update_lock only exists to make the mm
swap atomic with the later commit_creds() and all its readers operate
on the new mm; none looks at the detached old mm.
The cost was real: __mmput() runs exit_mmap() over the entire old
address space and can block in exit_aio() waiting for in-flight AIO,
so execve() of a large process blocked ptrace_attach() and every
exec_update_lock reader for the duration of the teardown.
The old mm is now stashed in bprm->old_mm and released from
setup_new_exec() after both locks are dropped, with a backstop in
free_bprm() for the error paths"
* tag 'kernel-7.2-rc1.task_exec_state' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
exec: free the old mm outside the exec locks
exec_state: relocate dumpable information
ptrace: add ptracer_access_allowed()
exec: introduce struct task_exec_state
sched/coredump: introduce enum task_dumpable
|
||
|
Linus Torvalds
|
f51cae6603 |
dma-mapping fixes for Linux 7.1
Three more fixes for the DMA-mapping code, related to PCI P2PDMA, DMA debug and DMA link ranges API (Li RongQing and Jason Gunthorpe). -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQSrngzkoBtlA8uaaJ+Jp1EFxbsSRAUCaisf2gAKCRCJp1EFxbsS RASLAP953EuMof1qqGoMSNpDMIYNO0392Tdqyiq+nm1BwnLWfgEA/Q0m9yVtxbR7 zP/dxo+H95OforpTNJYdEWnXOBaAbwM= =o0ql -----END PGP SIGNATURE----- Merge tag 'dma-mapping-7.1-2026-06-11' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux Pull dma-mapping fix from Marek Szyprowski: "Three more fixes for the DMA-mapping code, related to PCI P2PDMA, DMA debug and DMA link ranges API (Li RongQing and Jason Gunthorpe)" * tag 'dma-mapping-7.1-2026-06-11' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux: iommu/dma: Do not try to iommu_map a 0 length region in swiotlb dma-debug: fix physical address retrieval in debug_dma_sync_sg_for_device dma-mapping: direct: fix missing mapping for THRU_HOST_BRIDGE segments |
||
|
Rafael J. Wysocki
|
5ca48f6f2a |
Merge branches 'pm-sleep', 'pm-powercap' and 'pm-tools'
Merge updates related to system sleep support, two updates of the intel_rapl power capping driver, and a pm-graph utility fix for 7.2-rc1: - Add sysctl interface for DPM watchdog timeouts (Tzung-Bi Shih) - Use complete() instead of complete_all() in device_pm_sleep_init() to avoid a false-positive warning from lockdep_assert_RT_in_threaded_ctx() when CONFIG_PROVE_RAW_LOCK_NESTING is enabled (Jiakai Xu) - Use a flexible array for CRC uncompressed buffers during hibernation image saving (Rosen Penev) - Make the LZ4 algorithm available for hibernation compression (l1rox3) - Move the preallocate_image() call during hibernation after the "prepare" phase of the "freeze" transition (Matthew Leach) - Fix a memory leak in rapl_add_package_cpuslocked() in the intel_rapl power capping driver and use sysfs_emit() in cpumask_show() in that driver (Sumeet Pawnikar, Yury Norov) - Fix ValueError when parsing incomplete device properties in the pm-graph utility (Gongwei Li) * pm-sleep: PM: dpm_watchdog: Add sysctl interface for DPM watchdog timeouts PM: hibernate: Use flexible array for CRC uncompressed buffers PM: hibernate: make LZ4 available for hibernation compression PM: sleep: Use complete() in device_pm_sleep_init() PM: hibernate: call preallocate_image() after freeze prepare * pm-powercap: powercap: intel_rapl: Use sysfs_emit() in cpumask_show() powercap: intel_rapl: Fix memory leak in rapl_add_package_cpuslocked() * pm-tools: PM: tools: pm-graph: fix ValueError when parsing incomplete device properties |
||
|
Rafael J. Wysocki
|
0d05de7004 |
Merge branches 'pm-cpuidle', 'pm-opp' and 'pm-qos'
Merge cpuidle updates, OPP (operating performance points) updates and a PM QoS update for 7.2-rc1: - Allow the intel_idle driver to avoid exposing C-states that are redundant when PC6 is disabled (Artem Bityutskiy) - Fix memory leak and a potential race in the OPP core (Abdun Nihaal, Di Shen) - Mark Rust OPP methods as inline (Nicolás Antinori) - Fix misc device registration failure path in the PM QoS core (Yuho Choi) * pm-cpuidle: intel_idle: Drop C-states redundant when PC6 is disabled intel_idle: Introduce a helper for checking PC6 intel_idle: Add constants for MSR_PKG_CST_CONFIG_CONTROL * pm-opp: opp: rust: mark OPP methods as inline OPP: of: Fix potential memory leak in opp_parse_supplies() OPP: Fix race between OPP addition and lookup * pm-qos: PM: QoS: Fix misc device registration unwind |
||
|
Linus Torvalds
|
acb7500801 |
runtime verifier fixes for v7.1:
- Fix reset ordering on per-task destruction Reset the task before dropping the slot instead of after, which was causing out-of-bound memory accesses. - Fix HA monitor synchronization and cleanup Ensure synchronous cleanup for HA monitors by running timer callbacks in RCU read-side critical sections and using synchronize_rcu() during destruction. - Avoid armed timers after tasks exit Add automatic cleanup for per-task HA monitors to prevent timers from firing after task exit. - Fix memory ordering for DA/HA monitors Fix race conditions during monitor start by using release-acquire semantics for the monitoring flag. - Fix initialization for DA/HA monitors Ensure monitors are not initialized relying on potentially corrupted state like the monitoring flag, that is not reset by all monitors type and may have an unknown state in monitors reusing the storage (per-task). - Fix memory safety in per-task and per-object monitors Prevent use-after-free and out-of-bounds access by synchronizing with in-flight tracepoint probes using tracepoint_synchronize_unregister() before freeing monitor storage or releasing task slots. - Adjust monitors for preemptible tracepoints Fix monitors that relied on tracepoints disabling preemption. Explicitly disable task migration when per-CPU monitors handle events to avoid accessing the wrong state and update the opid monitor logic. - Fix incorrect __user specifier usage Remove __user from a non-pointer variable in the extract_params() helper. - Fix bugs in the rv tool Ensure strings are NUL-terminated, fix substring matching in monitor searches, and improve cleanup and exit status handling. - Fix several bugs in rvgen Fix LTL literal stringification, subparsers' options handling, and suffix stripping in dot2k. -----BEGIN PGP SIGNATURE----- iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCaiiJqhQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qlWSAQCZ6/v0Gyb+m7md9V65NWtAA3QKuJWU WvoQIjPLx+zCoAEAmfyhRxWGMKgBYn3yZfBU5nb1CBMcMStJ5Pp8b+uwNAs= =VjFc -----END PGP SIGNATURE----- Merge tag 'trace-rv-v7.1-rc6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull runtime verifier fixes from Steven Rostedt: - Fix reset ordering on per-task destruction Reset the task before dropping the slot instead of after, which was causing out-of-bound memory accesses. - Fix HA monitor synchronization and cleanup Ensure synchronous cleanup for HA monitors by running timer callbacks in RCU read-side critical sections and using synchronize_rcu() during destruction. - Avoid armed timers after tasks exit Add automatic cleanup for per-task HA monitors to prevent timers from firing after task exit. - Fix memory ordering for DA/HA monitors Fix race conditions during monitor start by using release-acquire semantics for the monitoring flag. - Fix initialization for DA/HA monitors Ensure monitors are not initialized relying on potentially corrupted state like the monitoring flag, that is not reset by all monitors type and may have an unknown state in monitors reusing the storage (per-task). - Fix memory safety in per-task and per-object monitors Prevent use-after-free and out-of-bounds access by synchronizing with in-flight tracepoint probes using tracepoint_synchronize_unregister() before freeing monitor storage or releasing task slots. - Adjust monitors for preemptible tracepoints Fix monitors that relied on tracepoints disabling preemption. Explicitly disable task migration when per-CPU monitors handle events to avoid accessing the wrong state and update the opid monitor logic. - Fix incorrect __user specifier usage Remove __user from a non-pointer variable in the extract_params() helper. - Fix bugs in the rv tool Ensure strings are NUL-terminated, fix substring matching in monitor searches, and improve cleanup and exit status handling. - Fix several bugs in rvgen Fix LTL literal stringification, subparsers' options handling, and suffix stripping in dot2k. * tag 'trace-rv-v7.1-rc6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: verification/rvgen: Fix ltl2k writing True as a literal verification/rvgen: Fix options shared among commands verification/rvgen: Fix suffix strip in dot2k tools/rv: Fix cleanup after failed trace setup tools/rv: Fix substring match when listing container monitors tools/rv: Fix substring match bug in monitor name search tools/rv: Ensure monitor name and desc are NUL-terminated rv: Use 0 to check preemption enabled in opid rv: Prevent task migration while handling per-CPU events rv: Ensure synchronous cleanup for HA monitors rv: Add automatic cleanup handlers for per-task HA monitors rv: Do not rely on clean monitor when initialising HA rv: Fix monitor start ordering and memory ordering for monitoring flag rv: Ensure all pending probes terminate on per-obj monitor destroy rv: Prevent in-flight per-task handlers from using invalid slots rv: Reset per-task DA monitors before releasing the slot rv: Fix __user specifier usage in extract_params() |
||
|
Yuho Choi
|
51a7c560cf |
PM: QoS: Fix misc device registration unwind
cpu_latency_qos_init() registers cpu_dma_latency first and, when
CONFIG_PM_QOS_CPU_SYSTEM_WAKEUP is enabled, registers cpu_wakeup_latency
afterwards. The second registration overwrites the first return value.
As a result, a failure to register cpu_dma_latency can be masked if the
second registration succeeds. Conversely, if cpu_dma_latency succeeds and
cpu_wakeup_latency fails, the function returns an error while leaving the
first misc device registered.
Return immediately on the first registration failure and deregister
cpu_dma_latency if the second registration fails.
Fixes:
|
||
|
Shashank Balaji
|
c82dfce478 |
kernel: param: initialize module_kset in a pure_initcall
Commit "driver core: platform: set mod_name in driver registration" will set struct device_driver's mod_name member for platform driver registration. For a driver to be registered with its mod_name set, module_kset needs to be initialized, which currently happens in a subsys_initcall in param_sysfs_init(). The tegra cbb drivers register themselves before module_kset init, in a core_initcall. This works currently because lookup_or_create_module_kobject(), which dereferences module_kset via kset_find_obj(), is not called if mod_name is not set, which is the case now. So in preparation for the commit "driver core: platform: set mod_name in driver registration", move module_kset init to pure_initcall level, ensuring it happens before tegra cbb driver registration. Suggested-by: Gary Guo <gary@garyguo.net> Reviewed-by: Gary Guo <gary@garyguo.net> Co-developed-by: Rahul Bukte <rahul.bukte@sony.com> Signed-off-by: Rahul Bukte <rahul.bukte@sony.com> Signed-off-by: Shashank Balaji <shashank.mahadasyam@sony.com> Link: https://patch.msgid.link/20260601101942.4002661-1-shashank.mahadasyam@sony.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
||
|
Linus Torvalds
|
09feffa073 |
Miscellaneous timer fixes:
- Fix the arch_inlined_clockevent_set_next_coupled() prototype
in the !CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST case
(Naveen Kumar Chaudhary)
- Fix an off-by-1 bug in the sys_settimeofday() usecs validation
code (Naveen Kumar Chaudhary)
- Mark vdso_k_*_data pointers as __ro_after_init
(Thomas Weißschuh)
- Fix livelock race in tmigr_handle_remote_up()
(Amit Matityahu)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'timers-urgent-2026-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
- Fix the arch_inlined_clockevent_set_next_coupled() prototype in the
!CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST case (Naveen Kumar Chaudhary)
- Fix an off-by-1 bug in the sys_settimeofday() usecs validation code
(Naveen Kumar Chaudhary)
- Mark vdso_k_*_data pointers as __ro_after_init (Thomas Weißschuh)
- Fix livelock race in tmigr_handle_remote_up() (Amit Matityahu)
* tag 'timers-urgent-2026-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers/migration: Fix livelock in tmigr_handle_remote_up()
vdso/datastore: Mark vdso_k_*_data pointers as __ro_after_init
time: Fix off-by-one in settimeofday() usec validation
clockevents: Fix duplicate type specifier in stub function parameter
|
||
|
Linus Torvalds
|
96c1ddbc16 |
Misc locking fixes:
- Fix a NULL pointer dereference bug in the FUTEX_CMP_REQUEUE_PI
code (Ji'an Zhou)
- Fix a NULL pointer dereference bug in the rtmutex code
(Davidlohr Bueso)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-urgent-2026-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Ingo Molnar:
- Fix a NULL pointer dereference bug in the FUTEX_CMP_REQUEUE_PI
code (Ji'an Zhou)
- Fix a NULL pointer dereference bug in the rtmutex code (Davidlohr
Bueso)
* tag 'locking-urgent-2026-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/rtmutex: Skip remove_waiter() when waiter is not enqueued
futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock
|
||
|
Linus Torvalds
|
76351effa5 |
vfs-7.1-rc7.fixes
Please consider pulling these changes from the signed vfs-7.1-rc7.fixes tag. Thanks! Christian -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCaiQb2wAKCRCRxhvAZXjc ol4fAP46Ta2gcT8uzJRHaXo3HMWJYY02dK1pXQ4zZDdiQMMSTgEAuaj/mOvx0VeX prloV/t7TBri6GAiWeE7Wu54d9rJZQ4= =clMX -----END PGP SIGNATURE----- Merge tag 'vfs-7.1-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull vfs fixes from Christian Brauner: - Fix error handling in ovl_cache_get() - Tighten access checks for exited tasks in pidfd_getfd() - Fix selftests leak in __wait_for_test() - Limit FUSE_NOTIFY_RETRIEVE to uptodate folios - Reject fuse_notify() pagecache ops on directories - Clear JOBCTL_PENDING_MASK for caller in zap_other_threads() - Fix failure to unlock in nfsd4_create_file() - Fix pointer arithmetic in qnx6 directory iteration - Fix UAF due to unlocked ->mnt_ns read in may_decode_fh() - Avoid potential null folio->mapping deref during iomap error reporting * tag 'vfs-7.1-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: iomap: avoid potential null folio->mapping deref during error reporting fhandle: fix UAF due to unlocked ->mnt_ns read in may_decode_fh() fs/qnx6: fix pointer arithmetic in directory iteration VFS: fix possible failure to unlock in nfsd4_create_file() signal: clear JOBCTL_PENDING_MASK for caller in zap_other_threads() fuse: reject fuse_notify() pagecache ops on directories fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate folios selftests: harness: fix pidfd leak in __wait_for_test pidfd: refuse access to tasks that have started exiting harder ovl: keep err zero after successful ovl_cache_get() |
||
|
Daniel Borkmann
|
9722955b54
|
bpf: Add simple xattr support to bpffs
Add support for extended attributes on bpffs inodes so that user space and BPF LSM programs can attach metadata, for example, a content hash or a security label - to a pinned object or directory. BPF LSM or user space tooling can then uniformly look at this (e.g. security.bpf.*) in similar way to other fs'es. The store is in-memory and non-persistent: it lives only for the lifetime of the mount, like everything else in bpffs. The modelling is similar to tmpfs. bpffs serves the trusted.* and security.* namespaces; user.* is left unsupported. As bpffs is FS_USERNS_MOUNT, security.* is reachable by the unprivileged mounter in a user namespace, and thus we are using the simple_xattr_set_limited infra there (trusted.* needs global CAP_SYS_ADMIN). bpf_fill_super() is open-coded instead of using simple_fill_super(), because the root inode must now be allocated through bpf_fs_alloc_inode() i.e. carry the bpf_fs_inode wrapper and come from the right cache - which requires s_op (and s_xattr) to be installed before the first inode is created. While at it, also harden s_iflags with SB_I_NOEXEC and SB_I_NODEV. bpf_fs_listxattr() is only reachable through the filesystem via i_op->listxattr, so the BPF token inode is left untouched. Name-based fsetxattr()/fgetxattr() on a token fd still work since the get/set handlers are installed at the superblock. For security.* namespace, we use simple_xattr_set_limited() but there was no simple_xattr_add_limited() API yet which was needed in bpf_fs_initxattrs() to avoid underflows in the accounting. The symlink target is freed in bpf_free_inode() rather than in bpf_destroy_inode() so that it is released only after an RCU grace period, as an RCU path walk following the symlink may still dereference inode->i_link in security_inode_follow_link(). Lastly, the bpf_symlink() allocated the symlink target is switched to GFP_KERNEL_ACCOUNT, so the string is charged to the caller's memcg. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://patch.msgid.link/20260602074012.416289-1-daniel@iogearbox.net Cc: Christian Brauner <brauner@kernel.org> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> |
||
|
Linus Torvalds
|
d1b0937f0e |
Probes fixes for v7.1-rc6
- tracing/probes: Point the error offset correctly for eprobe argument error Fix the eprobe event parser to point error position correctly. -----BEGIN PGP SIGNATURE----- iQFPBAABCgA5FiEEh7BulGwFlgAOi5DV2/sHvwUrPxsFAmoi0xkbHG1hc2FtaS5o aXJhbWF0c3VAZ21haWwuY29tAAoJENv7B78FKz8b5awIAL8sYmBb+0dZO9uPvAwS Ar0IlPGd/lnfLNUF5nmin+fSyAr4TIqLIuKjHZ2MxFGxtyITzWQDbXIBT7Wan5vy 3adAJTVgby+jz2k+MvTU1hU1wBt4E4nGvJQJf9Ohk7NuqiUYSDjbkPa2yA3fGFFY HGvvRlj0OF6eYbyiGIUTk5S4AYeBOFB6/qB9MbMTUHPXiM0LgzBVuR+Rimo1iFNO wdqJ9atrj8r4hdvAQLPeKXAfhahhHXlviGVDjtgGa9Gt7jESPw8fDdh5PWKWr7Vy 6Mr/o/16V13bFx4zWRacSwgSFsJsZukDS+bdD5HnEGhb8AYZxOYvy79H6URT3S4e rws= =rQ/U -----END PGP SIGNATURE----- Merge tag 'probes-fixes-v7.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing/probes fix from Masami Hiramatsu: "Fix the eprobe event parser to point error position correctly" * tag 'probes-fixes-v7.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing/probes: Point the error offset correctly for eprobe argument error |
||
|
Amit Matityahu
|
d486b4934a |
timers/migration: Fix livelock in tmigr_handle_remote_up()
tmigr_handle_remote_cpu() skips timer_expire_remote() when cpu ==
smp_processor_id(), assuming the local softirq path already handled this
CPU's timers.
This assumption is wrong because jiffies can advance after the handling of
the CPU's global timers in run_timer_base(BASE_GLOBAL) and before
tmigr_handle_remote() evaluates the expiry times.
As a consequence a timer which expires after the CPU local timer wheel
advanced and becomes expired in the remote handling is ignored and the
callback is never invoked and removed from the timer wheel.
What's worse is that fetch_next_timer_interrupt_remote() keeps reporting it
as expired, and the event is re-queued with expires == now on each
iteration. The goto-again loop spins indefinitely.
Fix this by calling timer_expire_remote() unconditionally. That's minimal
overhead for the common case as __run_timer_base() returns immediately if
there is nothing to expire in the local wheel.
[ tglx: Amend change log and add a comment ]
Fixes:
|
||
|
Davidlohr Bueso
|
40a25d59e8 |
locking/rtmutex: Skip remove_waiter() when waiter is not enqueued
syzbot triggered the following splat in remove_waiter() via FUTEX_CMP_REQUEUE_PI: KASAN: null-ptr-deref in range [0x0000000000000a88-0x0000000000000a8f] class_raw_spinlock_constructor remove_waiter+0x159/0x1200 kernel/locking/rtmutex.c:1561 rt_mutex_start_proxy_lock+0x103/0x120 futex_requeue+0x10e4/0x20d0 __x64_sys_futex+0x34f/0x4d0 task_blocks_on_rt_mutex() does not arm the waiter upon deadlock detection, leaving waiter->task nil, where |
||
|
Linus Torvalds
|
e7524845cd |
cgroup: Fixes for v7.1-rc6
One cpuset fix and a maintenance update, both low-risk:
- Fix cpuset partition CPU accounting under sibling CPU exclusion that could
produce wrong CPU assignments and trigger scheduling-domain warnings.
Includes selftests.
- Update an email address in MAINTAINERS.
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Merge tag 'cgroup-for-7.1-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
"One cpuset fix and a maintenance update, both low-risk:
- Fix cpuset partition CPU accounting under sibling CPU exclusion
that could produce wrong CPU assignments and trigger
scheduling-domain warnings. Includes selftests.
- Update an email address in MAINTAINERS"
* tag 'cgroup-for-7.1-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup/cpuset: Change Ridong's email
cgroup/cpuset: Add test cases for sibling CPU exclusion on partition update
cgroup/cpuset: Use effective_xcpus in partcmd_update add/del mask calculation
|
||
|
Linus Torvalds
|
ac5c3716c6 |
sched_ext: Fixes for v7.1-rc6
Two low-risk fixes:
- Drop a spurious warning that can fire during cgroup migration while a
sched_ext scheduler is loaded.
- Fix a drgn-based debug script that broke after scheduler state moved into
a per-scheduler struct.
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Merge tag 'sched_ext-for-7.1-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
Pull sched_ext fixes from Tejun Heo:
"Two low-risk fixes:
- Drop a spurious warning that can fire during cgroup migration while
a sched_ext scheduler is loaded
- Fix a drgn-based debug script that broke after scheduler state
moved into a per-scheduler struct"
* tag 'sched_ext-for-7.1-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
sched_ext: Don't warn on NULL cgrp_moving_from in scx_cgroup_move_task()
tools/sched_ext: Fix scx_show_state per-scheduler state reads
|
||
|
Li RongQing
|
9bfaa86b40 |
dma-debug: fix physical address retrieval in debug_dma_sync_sg_for_device
In debug_dma_sync_sg_for_device(), when iterating over a scatterlist,
the debug entry population mistakenly uses the head of the scatterlist
'sg' to fetch the physical address via sg_phys(), instead of using the
current iterator variable 's'.
This causes dma-debug to track the physical address of the very first
scatterlist entry for all subsequent entries in the list.
Fix this by passing the correct loop iterator 's' to sg_phys()
Fixes:
|
||
|
Gabriele Monaco
|
d9022172c1 |
rv: Use 0 to check preemption enabled in opid
Tracepoint handlers no longer run with preemption disabled by default
since
|
||
|
Gabriele Monaco
|
700782ec8f |
rv: Add automatic cleanup handlers for per-task HA monitors
Hybrid automata monitors may start timers, depending on the model, these
may remain active on an exiting task and cause false positives or even
access freed memory.
Add an enable/disable hook in the HA code, currently only populated by
the per-task handler for registration and deregistration.
This hooks to the sched_process_exit event and ensures the timer is
stopped for every exiting task. The handler is enabled automatically but
may be disabled, for instance if the monitor uses the event for another
purpose (but should still manually ensure timers are stopped).
Fixes:
|
||
|
Gabriele Monaco
|
4793e8a6e2 |
rv: Fix __user specifier usage in extract_params()
The attributes variables extracted from syscalls in the helper are both
defined with the __user specifier although only the actual pointer to
user data should be marked.
Remove the __user specifier from attr.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202604150820.Ny143u6X-lkp@intel.com
Fixes:
|
||
|
Li RongQing
|
560000d619 |
dma-mapping: direct: fix missing mapping for THRU_HOST_BRIDGE segments
In dma_direct_map_sg(), the case PCI_P2PDMA_MAP_THRU_HOST_BRIDGE
incorrectly used 'break' instead of falling through to MAP_NONE.
As a result, segments traversing the host bridge skipped the required
dma_direct_map_phys() call entirely, leaving sg->dma_address
uninitialized and leading to DMA failures. Fix this by using
'fallthrough;'.
Fixes:
|
||
|
Tejun Heo
|
02e545c429 |
sched_ext: Don't warn on NULL cgrp_moving_from in scx_cgroup_move_task()
A WARN fires when systemd's user manager writes "+cpu +memory +pids" to
its own subtree_control while a sched_ext scheduler is loaded:
WARNING: at kernel/sched/ext.c:3227 scx_cgroup_move_task+0xa8/0xb0
scx_cgroup_move_task+0xa8/0xb0
sched_move_task+0x134/0x290
cpu_cgroup_attach+0x39/0x70
cgroup_migrate_execute+0x37d/0x450
cgroup_update_dfl_csses+0x1e3/0x270
cgroup_subtree_control_write+0x3e7/0x440
scx_cgroup_can_attach() arms cgrp_moving_from only when a task's cpu
cgroup changes. It can still be NULL when scx_cgroup_move_task() runs,
through this sequence:
Step Result
--------------------------------- ----------------------------------
1. cpu enabled on cgroup G cpu css = A
2. cpu toggled off then on for G A killed, B created (same cgroup)
3. an exiting task keeps A alive migration skips it, A now stale
4. +memory migrates G stale A vs current B pulls cpu in
5. cpu attach runs for all tasks hits a live, cpu-unchanged task
6. scx_cgroup_move_task() on it cgrp_moving_from NULL -> WARN
The mismatch is that scx_cgroup_can_attach() keys on cgroup identity
while migration drives the move on css identity, so a NULL cgrp_moving_from
here is a legitimate css-only migration, not a missing prep.
The call is already gated on cgrp_moving_from, so just drop the warning.
ops.cgroup_prep_move() and ops.cgroup_move() stay paired.
Fixes:
|
||
|
Ji'an Zhou
|
74e144274a |
futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock
When FUTEX_CMP_REQUEUE_PI requeues a non-top waiter that already owns the
target PI futex, task_blocks_on_rt_mutex() returns -EDEADLK before setting
waiter->task.
The subsequent remove_waiter() in rt_mutex_start_proxy_lock() dereferences
the NULL waiter->task, causing a kernel crash.
Add a self-deadlock check for non-top waiters before calling
rt_mutex_start_proxy_lock(), analogous to the top-waiter check in
futex_lock_pi_atomic().
Fixes:
|
||
|
Naveen Kumar Chaudhary
|
ce4abda5e1 |
time: Fix off-by-one in settimeofday() usec validation
The validation check uses '>' instead of '>=' when comparing tv_usec
against USEC_PER_SEC, allowing the value 1000000 through. After
conversion to nanoseconds (*= 1000), this produces tv_nsec ==
NSEC_PER_SEC, violating the timespec invariant that tv_nsec must be
less than NSEC_PER_SEC.
Use '>=' to reject tv_usec values that are not in the valid range of
0 to 999999.
Fixes:
|
||
|
Naveen Kumar Chaudhary
|
c1ca14ca22 |
clockevents: Fix duplicate type specifier in stub function parameter
The stub for arch_inlined_clockevent_set_next_coupled() has 'u64 u64
cycles' in its parameter list. Since u64 is a typedef, the compiler
parses the second 'u64' as the parameter name, making 'cycles' an
unused token. Remove the duplicate so the parameter is correctly named.
Fixes:
|
||
|
Uladzislau Rezki (Sony)
|
e853c1b285 |
Merge branches 'rcutorture.2026.05.24' and 'misc.2026.05.24' into rcu-merge.2026.05.24
rcutorture.2026.05.24: Torture-test updates misc.2026.05.24: Miscellaneous RCU updates |
||
|
Arnd Bergmann
|
002668809b |
rcu/nocb: reduce stack usage in nocb_gp_wait()
When CONFIG_UBSAN_ALIGNMENT is enabled, the stack usage of nocb_gp_wait() grows above typical warning limits: In file included from kernel/rcu/tree.c:4930: kernel/rcu/tree_nocb.h: In function 'rcu_nocb_gp_kthread': kernel/rcu/tree_nocb.h:866:1: error: the frame size of 1968 bytes is larger than 1280 bytes [-Werror=frame-larger-than=] Apparently, the problem is passing rcu_data from a 'void *' pointer, which gcc assumes may be misaligned. When the function is not inlined into rcu_nocb_gp_kthread(), that is no longer visible to gcc. Add a 'noinline_for_stack' annotation that leads to skipping a lot of the alignment sanitizer checks and keeps the stack usage 60% lower here. Reviewed-by: Kunwu Chan <chentao@kylinos.cn> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> |
||
|
Linus Torvalds
|
9d87d0fc8c |
liveupdate: kho: two regression fixes
* fix order calculation for kho_unpreserve_pages() to make sure sure that
the order calculation in kho_unpreserve_pages() mathes the order
calculation in kho_preserve_pages().
* fix math in calculation of KHO_TREE_MAX_DEPTH to make it work with 16KB
pages.
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Merge tag 'liveupdate-fixes-2026-05-30' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux
Pull liveupdate fixes from Mike Rapoport:
"Two kexec handover regression fixes:
- fix order calculation for kho_unpreserve_pages() to make sure sure
that the order calculation in kho_unpreserve_pages() mathes the
order calculation in kho_preserve_pages().
- fix math in calculation of KHO_TREE_MAX_DEPTH to make it work with
16KB pages"
* tag 'liveupdate-fixes-2026-05-30' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux:
kho: fix order calculation for kho_unpreserve_pages()
kho: fix KHO_TREE_MAX_DEPTH for non-4KB page sizes
|
||
|
Masami Hiramatsu (Google)
|
85e0f27dd1 |
tracing/probes: Point the error offset correctly for eprobe argument error
Fix to point the error offset correctly for eprobe argument error. In the cleanup commit |
||
|
Sun Shaojie
|
0a68853de2 |
cgroup/cpuset: Use effective_xcpus in partcmd_update add/del mask calculation
When sibling CPU exclusion occurs, a partition's user_xcpus may contain
CPUs that were never actually granted to it. These CPUs are present in
user_xcpus(cs) but not in cs->effective_xcpus.
The partcmd_update path in update_parent_effective_cpumask() uses
user_xcpus(cs) (via the local variable xcpus) to compute the addmask
(CPUs to return to parent) and delmask (CPUs to request from parent).
This is incorrect:
1) When newmask removes a CPU that was previously excluded by a
sibling, addmask incorrectly includes that CPU and tries to return
it to the parent even though the partition never actually owned it,
causing CPU overlap with sibling partitions and triggering warnings
in generate_sched_domains().
2) When newmask adds a previously excluded CPU that is now available,
delmask fails to request it from the parent because user_xcpus(cs)
already includes it.
Fix this by using cs->effective_xcpus instead of user_xcpus(cs) in all
partcmd_update paths that calculate addmask or delmask, including the
PERR_NOCPUS error handling paths.
Reproducers:
Example 1 - Removing a sibling-excluded CPU incorrectly returns it:
# cd /sys/fs/cgroup
# echo "0-1" > a1/cpuset.cpus
# echo "root" > a1/cpuset.cpus.partition
# echo "0-2" > b1/cpuset.cpus
# echo "root" > b1/cpuset.cpus.partition
# echo "2" > b1/cpuset.cpus
# cat cpuset.cpus.effective
# Actual: 0-1,3 Expected: 3
Example 2 - Expanding to a previously excluded CPU fails to request it:
# cd /sys/fs/cgroup
# echo "0-1" > a1/cpuset.cpus
# echo "root" > a1/cpuset.cpus.partition
# echo "0-2" > b1/cpuset.cpus
# echo "root" > b1/cpuset.cpus.partition
# echo "member" > a1/cpuset.cpus.partition
# echo "1-2" > b1/cpuset.cpus
# cat cpuset.cpus.effective
# Actual: 0-1,3 Expected: 0,3
Fixes:
|
||
|
Linus Torvalds
|
d60ec36cab |
13 hotfixes. 9 are for MM. 9 are cc:stable and the remaining 4 address
post-7.1 issues or aren't considered suitable for backporting. All patches are singletons - please see the individual changelogs for details. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCahTZ2QAKCRDdBJ7gKXxA ju+UAQDUga+l95O1iOnrraKFWvT1ghQKTgbNxGMwefHjVLLFBQD+Ln2wPfz73Ks7 H8WK0k5D0g+6lKs6tFGAALdQnTU0BAU= =MYsv -----END PGP SIGNATURE----- Merge tag 'mm-hotfixes-stable-2026-05-25-16-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "13 hotfixes. 9 are for MM. 9 are cc:stable and the remaining 4 address post-7.1 issues or aren't considered suitable for backporting. All patches are singletons - please see the individual changelogs for details" * tag 'mm-hotfixes-stable-2026-05-25-16-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: Revert "mm: introduce a new page type for page pool in page type" mm/vmalloc: do not trigger BUG() on BH disabled context MAINTAINERS, mailmap: change email for Eugen Hristev mm/migrate_device: fix pgtable leak in migrate_vma_insert_huge_pmd_page kernel/fork: validate exit_signal in kernel_clone() mm: memcontrol: propagate NMI slab stats to memcg vmstats mm/damon/sysfs-schemes: delete tried region in regions_rmdirs() mm/rmap: initialize nr_pages to 1 at loop start in try_to_unmap_one zram: fix use-after-free in zram_writeback_endio memfd: deny writeable mappings when implying SEAL_WRITE ipc: limit next_id allocation to the valid ID range Revert "mm/hugetlbfs: update hugetlbfs to use mmap_prepare" MAINTAINERS: .mailmap: update after GEHC spin-off |
||
|
Rosen Penev
|
3da1dbf936 |
PM: hibernate: Use flexible array for CRC uncompressed buffers
The CRC uncompressed buffer pointer array has the same lifetime as struct crc_data, but it is currently allocated separately. That adds another allocation failure path and a matching cleanup branch without providing any extra flexibility. Store the pointer array as a flexible array member and allocate it together with the crc_data using kzalloc_flex(). The array remains zero-initialized, while the allocation and error handling become simpler. Assisted-by: Codex:GPT-5.5 Signed-off-by: Rosen Penev <rosenp@gmail.com> Link: https://patch.msgid.link/20260510213948.41750-1-rosenp@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
l1rox3
|
2068d7715e |
PM: hibernate: make LZ4 available for hibernation compression
Without this, CRYPTO_LZ4 had to be manually enabled in the config to use LZ4 for hibernation compression. Add the select so it gets pulled in automatically when hibernation is enabled, just like CRYPTO_LZO already does. Tested-by: l1rox3 <l1rox3.developer@gmail.com> Signed-off-by: l1rox3 <l1rox3.developer@gmail.com> Link: https://patch.msgid.link/20260520081254.13493-1-l1rox3.developer@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Christian Brauner (Amutable)
|
6b1c66c9cc
|
exec_state: relocate dumpable information
The dumpable flag captured at execve() is consulted by __ptrace_may_access() and several /proc owner / visibility checks. It lives on mm_struct today, which exit_mm() clears from the task long before the task itself is reaped. exec_state is anchored to the execve() that established the current privilege domain. CLONE_VM siblings refcount-share the parent's exec_state via copy_exec_state(); non-CLONE_VM clones allocate a fresh exec_state inheriting the parent's dumpable mode and user_ns reference via task_exec_state_copy(). execve() allocates a fresh instance (via alloc_task_exec_state() in begin_new_exec()) and installs it under task_lock + exec_update_lock with task_exec_state_replace(). init_task uses a static instance. The dumpable mode now lives on task->exec_state->dumpable. task->mm->flags no longer carries dumpability; MMF_DUMPABLE_MASK is removed, but MMF_DUMPABLE_BITS is reserved so MMF_DUMP_FILTER_* bit positions remain stable for the /proc/<pid>/coredump_filter ABI. The task->user_dumpable cache bit and its assignment in exit_mm() are removed; readers go through get_dumpable(task) directly. coredump_params gains a snapshot field cprm.dumpable, populated from get_dumpable(current) at vfs_coredump() entry, replacing the previous __get_dumpable(cprm->mm_flags) consumers in fs/coredump.c and fs/pidfs.c. The user namespace recorded at execve() is consulted by __ptrace_may_access() and by /proc/PID/* owner derivation. Move the captured user_ns onto task_exec_state, which stays attached to the task past exit_mm() and across exit_files(). bprm grows a user_ns field staged in bprm_mm_init() with the caller's user_ns, narrowed by would_dump() to the closest privileged ancestor, and consumed by exec_mmap() via alloc_task_exec_state(bprm->user_ns). free_bprm() releases the staging reference. mm_struct loses ->user_ns entirely. Initializers in init-mm, efi_mm, and the implicit one in mm_init()/dup_mm()/mm_alloc() are removed; __mmdrop() drops the matching put_user_ns(). The kthread_use_mm() WARN_ON_ONCE(!mm->user_ns) is no longer meaningful and goes too. Reviewed-by: Jann Horn <jannh@google.com> Link: https://patch.msgid.link/20260520-work-task_exec_state-v3-4-69f895bc1385@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> |
||
|
Christian Brauner (Amutable)
|
92f829f6b2
|
ptrace: add ptracer_access_allowed()
Add a helper that encapsulates all of the logic for checking ptrace access and remove open-coded versions in follow-up patches. Reviewed-by: Jann Horn <jannh@google.com> Reviewed-by: David Hildenbrand (arm) <david@kernel.org> Link: https://patch.msgid.link/20260520-work-task_exec_state-v3-3-69f895bc1385@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> |
||
|
Christian Brauner (Amutable)
|
b092062cb6
|
exec: introduce struct task_exec_state
Introduce struct task_exec_state, a per-task RCU-protected structure that holds the dumpable mode and the user namespace and stays attached to the task for its full lifetime. task_exec_state_rcu() is the canonical reader: asserts RCU or task_lock is held, WARNs on a NULL state, returns the rcu_dereference()'d pointer. Reviewed-by: Jann Horn <jannh@google.com> Link: https://patch.msgid.link/20260520-work-task_exec_state-v3-2-69f895bc1385@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> |
||
|
Christian Brauner (Amutable)
|
4f365e7a5d
|
sched/coredump: introduce enum task_dumpable
Replace the SUID_DUMP_DISABLE/USER/ROOT preprocessor constants with enum task_dumpable. Numeric values are preserved (kernel.suid_dumpable sysctl and prctl(PR_SET_DUMPABLE) ABI), so this is a pure rename with no behavioral change. Subsequent commits relocate dumpability onto a per-task structure where the enum type will allow stronger type-checking on the new API. Reviewed-by: Jann Horn <jannh@google.com> Reviewed-by: David Hildenbrand (arm) <david@kernel.org> Link: https://patch.msgid.link/20260520-work-task_exec_state-v3-1-69f895bc1385@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> |
||
|
Pratyush Yadav (Google)
|
8fd2f26fa2 |
kho: fix order calculation for kho_unpreserve_pages()
Commit |
||
|
Danilo Krummrich
|
56785dcb2e |
Linux 7.1-rc5
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||
|
Linus Torvalds
|
f0e77c598e |
bpf-fixes
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE+soXsSLHKoYyzcli6rmadz2vbToFAmoRvpcACgkQ6rmadz2v bTow3w/+L3PVujliBpziQFTnHJ2SoTiwUoyjJpsQOc2o1yDEWJXvTcnQ5EURah4t aDMjPBBWgDea7HHWvC/vbRf2D8AjCf3gZBBpzW6uTQ2F1whD3DRCZ4O6XPvfdJEQ R0JkqZyjBjH9fkKBy30PcF+XM9iJ5pY/mkx6nCrcYvsvbj5cIkZnmP03vBGh1jeI yanlYb6N2XHwQp98PKoiN4/BP4ZOQx2HhBX0TmhTcRXVAyyX5SQy4ukrp1y2CSji YjpM2qHdEMtMeFFwcy1K2hJwNbjhrvfgHaKbwSuM3eLjug2AMBX0zp/4Zvw7mb2o B6zMRo0UgOt+kJzunmqnfNe01YZ+Z+So+FkinLSTba91gwCgxa3Qm3gNsZBtxv5V ayrrrFoB1PCxsRJqC0Jio7WXY1JRUkusHOdzR/8pygmwcp+vy6XEzJwhGD+DeMcu T4VJj2bp1bCK4iZwqjyxNAoniYSIjwxzwVDw8s0Zz1Bk+92YJEnZatahFTYFzJRK G9hnJaht0dK960LnudBUwKXz37dvM3LxAAt0ckAepfHAOwwrdB5XhgLQjfPZejot J6FWsxVoS1L+lXV7104QPy2Y9zmJ7ElOzQHWRcoBWs7Srar1a+PUFD0nkuSKmPcu 7P3ukMr6NyekE0zGlOWSZNetlZpdzvUrpuRY2WOIl+sezwCp2xg= =04VP -----END PGP SIGNATURE----- Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf Pull bpf fixes from Alexei Starovoitov: - Fix bpf_throw() and global subprog combination (Kumar Kartikeya Dwivedi) - Fix out of bounds access in BPF interpreter (Yazhou Tang) - Fix potential out of bounds access in inner per-cpu array map (Guannan Wang) - Reject NULL data/sig in bpf_verify_pkcs7_signature (KP Singh) * tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: libbpf: fix off-by-one in emit_signature_match jump offset bpf: Reject NULL data/sig in bpf_verify_pkcs7_signature selftests/bpf: Cover global subprog exception leaks bpf: Check global subprog exception paths bpf: make bpf_session_is_return() reference optional bpf: Use array_map_meta_equal for percpu array inner map replacement selftests/bpf: Add test for large offset bpf-to-bpf call bpf: Fix s16 truncation for large bpf-to-bpf call offsets bpf: Fix out-of-bounds read in bpf_patch_call_args() |
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Zqiang
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42c5468f9c |
rcu-tasks: Fix possible boot-time tests failed for the call_rcu_tasks()
The following scenarios will cause the call_rcu_tasks() boot-time
tests failed:
CPU0 CPU1
rcu_init_tasks_generic()
->rcu_tasks_initiate_self_tests()
->call_rcu_tasks_trace(&tests[1].rh, test_rcu_tasks_callback)
->call_rcu_tasks_generic()
->havekthread = smp_load_acquire(&rtp->kthread_ptr)
"The havekthread is false"
....
rcu_tasks_kthread()
->smp_store_release(&rtp->kthread_ptr, current)
->rcu_tasks_one_gp()
->rcuwait_wait_event()
->rcu_tasks_need_gpcb()
->for (cpu = 0; cpu < dequeue_limit; cpu++)
->rcu_segcblist_n_cbs(&rtpcp->cblist) == 0
->schedule()
->raw_spin_trylock_rcu_node()
->needwake = (func == wakeme_after_rcu) ||
(rcu_segcblist_n_cbs(&rtpcp->cblist) == rcu_task_lazy_lim)
"the rcu_task_lazy_lim default value is 32, and the
func pointer is test_rcu_tasks_callback, lead to needwake
is false."
->if (havekthread && !needwake && !timer_pending(&rtpcp->lazy_timer))
"the havekthread is false, will not enter here."
....
"the needwake is false lead to rtp_irq_work can not queue,
even if the rtp->kthread_ptr already exists at this point."
->if (needwake && READ_ONCE(rtp->kthread_ptr))
->irq_work_queue(&rtpcp->rtp_irq_work)
For the above scenarios, if the call_rcu_tasks() is not called again
afterward, the rcu_tasks_kthread will not have a chance to be wakeup,
the test_rcu_tasks_callback() will never be called, the boot-time tests
failed can happen, this commit therefore check havekthread variable, if
it's false and the rtpcp->cblist is empty, set needwake variable is true,
if the rtp->kthread_ptr exist, the rtpcp->rtp_irq_work can be queued to
wakeup rcu_tasks_kthread.
Signed-off-by: Zqiang <qiang.zhang@linux.dev>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
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Uladzislau Rezki (Sony)
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eceb659752 |
rcu: Latch normal synchronize_rcu() path on flood
Currently, rcu_normal_wake_from_gp is only enabled by default on small systems(<= 16 CPUs) or when a user explicitly set it enabled. Introduce an adaptive latching mechanism: * Track the number of in-flight synchronize_rcu() requests using a new rcu_sr_normal_count counter; * If the count reaches/exceeds RCU_SR_NORMAL_LATCH_THR(64), it sets the rcu_sr_normal_latched, reverting new requests onto the scaled wait_rcu_gp() path; * The latch is cleared only when the pending requests are fully drained(nr == 0); * Enables rcu_normal_wake_from_gp by default for all systems, relying on this dynamic throttling instead of static CPU limits. Testing(synthetic flood workload): * Kernel version: 6.19.0-rc6 * Number of CPUs: 1536 * 60K concurrent synchronize_rcu() calls Perf(cycles, system-wide): total cycles: 932020263832 rcu_sr_normal_add_req(): 2650282811 cycles(~0.28%) Perf report excerpt: 0.01% 0.01% sync_test/... [k] rcu_sr_normal_add_req Measured overhead of rcu_sr_normal_add_req() remained ~0.28% of total CPU cycles in this synthetic stress test. Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Tested-by: Samir M <samir@linux.ibm.com> Suggested-by: Joel Fernandes <joelagnelf@nvidia.com> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> |
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Paul E. McKenney
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d9b4d36b8c |
rcu: Simplify param_set_next_fqs_jiffies() by applying clamp_val()
This commit replaces a nested ?: sequence with clamp_val(). This does not reduce the number of lines of code, but it does simplify the line that it modifies. Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> |
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Paul E. McKenney
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5f136351ed |
rcu: Simplify rcu_do_batch() by applying clamp()
This commit replaces a nested ?: sequence with clamp(). This does not reduce the number of lines of code, but it does simplify the line that it modifies. Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> |
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Paul E. McKenney
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59cf5dbcc9 |
torture: Add torture_sched_set_normal() for user-specified nice values
This new torture_sched_set_normal() function clamps the nice value at the MIN_NICE..MAX_NICE limits, splatting it these limits are exceeded. It then invokes sched_set_normal() to set the new value. This prevents more difficult-to-debug failures within the scheduler. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> |