Here are some small char/misc driver fixes to resolve reported problems
for 6.15-rc4. Included in here are:
- misc chrdev region range fix reported by many people
- nvmem driver fixes and dt updates
- mei new device id and fixes
- comedi driver fix
- pps driver fix
- binder debug log fix
- pci1xxxx driver fixes
- firmware driver fix
All of these have been in linux-next for over a week with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char/misc driver fixes to resolve reported
problems for 6.15-rc4. Included in here are:
- misc chrdev region range fix reported by many people
- nvmem driver fixes and dt updates
- mei new device id and fixes
- comedi driver fix
- pps driver fix
- binder debug log fix
- pci1xxxx driver fixes
- firmware driver fix
All of these have been in linux-next for over a week with no reported
issues"
* tag 'char-misc-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (25 commits)
firmware: stratix10-svc: Add of_platform_default_populate()
mei: vsc: Use struct vsc_tp_packet as vsc-tp tx_buf and rx_buf type
mei: vsc: Fix fortify-panic caused by invalid counted_by() use
pps: generators: tio: fix platform_set_drvdata()
mcb: fix a double free bug in chameleon_parse_gdd()
misc: microchip: pci1xxxx: Fix incorrect IRQ status handling during ack
misc: microchip: pci1xxxx: Fix Kernel panic during IRQ handler registration
char: misc: register chrdev region with all possible minors
mei: me: add panther lake H DID
comedi: jr3_pci: Fix synchronous deletion of timer
binder: fix offset calculation in debug log
intel_th: avoid using deprecated page->mapping, index fields
dt-bindings: nvmem: Add compatible for MSM8960
dt-bindings: nvmem: Add compatible for IPQ5018
nvmem: qfprom: switch to 4-byte aligned reads
nvmem: core: update raw_len if the bit reading is required
nvmem: core: verify cell's raw_len
nvmem: core: fix bit offsets of more than one byte
dt-bindings: nvmem: fixed-cell: increase bits start value to 31
dt-bindings: nvmem: Add compatible for MS8937
...
Here are some small driver core fixes to resolve a number of reported
problems. Included in here are:
- driver core sync fix revert to resolve a much reported problem,
hopefully this is finally resolved
- MAINTAINERS file update, documenting that the driver-core tree is
now under a "shared" maintainership model, thanks to Rafael and
Danilo for offering to do this!
- auxbus documentation and MAINTAINERS file update
- MAINTAINERS file update for Rust PCI code
- firmware rust binding fixup
- software node link fix
All of these have been in linux-next for over a week with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core fixes from Greg KH:
"Here are some small driver core fixes to resolve a number of reported
problems. Included in here are:
- driver core sync fix revert to resolve a much reported problem,
hopefully this is finally resolved
- MAINTAINERS file update, documenting that the driver-core tree is
now under a "shared" maintainership model, thanks to Rafael and
Danilo for offering to do this!
- auxbus documentation and MAINTAINERS file update
- MAINTAINERS file update for Rust PCI code
- firmware rust binding fixup
- software node link fix
All of these have been in linux-next for over a week with no reported
issues"
* tag 'driver-core-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
drivers/base/memory: Avoid overhead from for_each_present_section_nr()
software node: Prevent link creation failure from causing kobj reference count imbalance
device property: Add a note to the fwnode.h
drivers/base: Add myself as auxiliary bus reviewer
drivers/base: Extend documentation with preferred way to use auxbus
driver core: fix potential NULL pointer dereference in dev_uevent()
driver core: introduce device_set_driver() helper
Revert "drivers: core: synchronize really_probe() and dev_uevent()"
MAINTAINERS: update the location of the driver-core git tree
rust: firmware: Use `ffi::c_char` type in `FwFunc`
MAINTAINERS: pci: add entry for Rust PCI code
- avoid unused variable warnings (Arnd Bergmann, Marek Szyprowski)
- add runtume warnings and debug messages for devices with limited DMA
capabilities (Balbir Singh, Chen-Yu Tsai)
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Merge tag 'dma-mapping-6.15-2025-04-25' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
Pull dma-maping fixes from Marek Szyprowski:
- avoid unused variable warnings (Arnd Bergmann, Marek Szyprowski)
- add runtume warnings and debug messages for devices with limited DMA
capabilities (Balbir Singh, Chen-Yu Tsai)
* tag 'dma-mapping-6.15-2025-04-25' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
dma-coherent: Warn if OF reserved memory is beyond current coherent DMA mask
dma-mapping: Fix warning reported for missing prototype
dma-mapping: avoid potential unused data compilation warning
dma/mapping.c: dev_dbg support for dma_addressing_limited
dma/contiguous: avoid warning about unused size_bytes
Signed-off-by: Carlos Maiolino <cem@kernel.org>
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Merge tag 'xfs-fixes-6.15-rc4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Carlos Maiolino:
"This contains a fix for a build failure on some 32-bit architectures
and a warning generating docs"
* tag 'xfs-fixes-6.15-rc4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: remove duplicate Zoned Filesystems sections in admin-guide
XFS: fix zoned gc threshold math for 32-bit arches
- Case insensitive directories now work
- Ciemap now correctly reports on unwritten pagecache data
- bcachefs tools 1.25.1 was incorrectly picking unaligned bucket sizes;
fix journal and write path bugs this uncovered
And assorted smaller fixes...
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Merge tag 'bcachefs-2025-04-24' of git://evilpiepirate.org/bcachefs
Pull bcachefs fixes from Kent Overstreet:
- Case insensitive directories now work
- Ciemap now correctly reports on unwritten pagecache data
- bcachefs tools 1.25.1 was incorrectly picking unaligned bucket sizes;
fix journal and write path bugs this uncovered
And assorted smaller fixes...
* tag 'bcachefs-2025-04-24' of git://evilpiepirate.org/bcachefs: (24 commits)
bcachefs: Rework fiemap transaction restart handling
bcachefs: add fiemap delalloc extent detection
bcachefs: refactor fiemap processing into extent helper and struct
bcachefs: track current fiemap offset in start variable
bcachefs: drop duplicate fiemap sync flag
bcachefs: Fix btree_iter_peek_prev() at end of inode
bcachefs: Make btree_iter_peek_prev() assert more precise
bcachefs: Unit test fixes
bcachefs: Print mount opts earlier
bcachefs: unlink: casefold d_invalidate
bcachefs: Fix casefold lookups
bcachefs: Casefold is now a regular opts.h option
bcachefs: Implement fileattr_(get|set)
bcachefs: Allocator now copes with unaligned buckets
bcachefs: Start copygc, rebalance threads earlier
bcachefs: Refactor bch2_run_recovery_passes()
bcachefs: bch2_copygc_wakeup()
bcachefs: Fix ref leak in write_super()
bcachefs: Change __journal_entry_close() assert to ERO
bcachefs: Ensure journal space is block size aligned
...
Restart handling in the previous patch was incorrect, so: move btree
operations into a separate helper, and run it with a lockrestart_do().
Additionally, clarify whether pagecache or the btree takes precedence.
Right now, the btree takes precedence: this is incorrect, but it's
needed to pass fstests. Add a giant comment explaining why.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs currently populates fiemap data from the extents btree.
This works correctly when the fiemap sync flag is provided, but if
not, it skips all delalloc extents that have not yet been flushed.
This is because delalloc extents from buffered writes are first
stored as reservation in the pagecache, and only become resident in
the extents btree after writeback completes.
Update the fiemap implementation to process holes between extents by
scanning pagecache for data, via seek data/hole. If a valid data
range is found over a hole in the extent btree, fake up an extent
key and flag the extent as delalloc for reporting to userspace.
Note that this does not necessarily change behavior for the case
where there is dirty pagecache over already written extents, where
when in COW mode, writeback will allocate new blocks for the
underlying ranges. The existing behavior is consistent with btrfs
and it is recommended to use the sync flag for the most up to date
extent state from fiemap.
Signed-off-by: Brian Foster <bfoster@redhat.com>
The bulk of the loop in bch2_fiemap() involves processing the
current extent key from the iter, including following indirections
and trimming the extent size and such. This patch makes a few
changes to reduce the size of the loop and facilitate future changes
to support delalloc extents.
Define a new bch_fiemap_extent structure to wrap the bkey buffer
that holds the extent key to report to userspace along with
associated fiemap flags. Update bch2_fill_extent() to take the
bch_fiemap_extent as a param instead of the individual fields.
Finally, lift the bulk of the extent processing into a
bch2_fiemap_extent() helper that takes the current key and formats
the bch_fiemap_extent appropriately for the fill function.
No functional changes intended by this patch.
Signed-off-by: Brian Foster <bfoster@redhat.com>
FIEMAP_FLAG_SYNC handling was deliberately moved into core code in
commit 45dd052e67 ("fs: handle FIEMAP_FLAG_SYNC in fiemap_prep"),
released in kernel v5.8. Update bcachefs accordingly.
Signed-off-by: Brian Foster <bfoster@redhat.com>
At the end of the inode, on an extents iterator, peek_slot() has to
advance to the next position to avoid returning a 0 size extent, which
is not allowed.
Changing iter->pos confuses peek_prev(), but we don't need to call
peek_slot() in this case.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
The issue this assert is guarding against is that in
BTREE_ITER_filter_snapshots mode we only want to be iterating within a
single inode number - if we iterate into another inode number with keys
for a different snapshot tree, we'll loop arbitrarily long before
finding a key we can return.
This comes up in the unit tests, where we're using inode 0 for our test
keys.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
If we aren't mounting with the correct degraded option, it's helpful to
know that before we fail to mount degraded.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
casefolding results in additional aliases on lookup for the
non-casefolded names - these need invalidating on unlink.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Add casefolding to bch2_lookup_trans:
During the delay between when casefolding was written and when it was
merged, the main filesystem lookup path grew self healing - which meant
it was no longer using bch2_dirent_lookup_trans(), where casefolding on
lookups happens.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
The single core change is an obvious bug fix (and falls within the LF
guidelines for patches from sanctioned entities). The other driver
changes are a bit larger but likewise pretty obvious.
Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"The single core change is an obvious bug fix (and falls within the LF
guidelines for patches from sanctioned entities). The other driver
changes are a bit larger but likewise pretty obvious"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: mpi3mr: Add level check to control event logging
scsi: ufs: core: Add NULL check in ufshcd_mcq_compl_pending_transfer()
scsi: core: Clear flags for scsi_cmnd that did not complete
scsi: ufs: Introduce quirk to extend PA_HIBERN8TIME for UFS devices
scsi: ufs: qcom: Add quirks for Samsung UFS devices
scsi: target: iscsi: Fix timeout on deleted connection
scsi: mpi3mr: Reset the pending interrupt flag
scsi: mpi3mr: Fix pending I/O counter
scsi: ufs: mcq: Add NULL check in ufshcd_mcq_abort()
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Merge tag 'landlock-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux
Pull landlock fixes from Mickaël Salaün:
"Fix some Landlock audit issues, add related tests, and updates
documentation"
* tag 'landlock-6.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
landlock: Update log documentation
landlock: Fix documentation for landlock_restrict_self(2)
landlock: Fix documentation for landlock_create_ruleset(2)
selftests/landlock: Add PID tests for audit records
selftests/landlock: Factor out audit fixture in audit_test
landlock: Log the TGID of the domain creator
landlock: Remove incorrect warning
- Revert acomp multibuffer tests which were buggy.
- Fix off-by-one regression in new scomp code.
- Lower quality setting on atmel-sha204a as it may not be random.
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Merge tag 'v6.15-p5' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
- Revert acomp multibuffer tests which were buggy
- Fix off-by-one regression in new scomp code
- Lower quality setting on atmel-sha204a as it may not be random
* tag 'v6.15-p5' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: atmel-sha204a - Set hwrng quality to lowest possible
crypto: scomp - Fix off-by-one bug when calculating last page
Revert "crypto: testmgr - Add multibuffer acomp testing"
Alexis Lothore says:
====================
net: stmmac: fix timestamp snapshots on dwmac1000
this is the v2 of a small series containing two small fixes for the
timestamp snapshot feature on stmmac, especially on dwmac1000 version.
Those issues have been detected on a socfpga (Cyclone V) platform. They
kind of follow the big rework sent by Maxime at the end of last year to
properly split this feature support between different versions of the
DWMAC IP.
v1: https://lore.kernel.org/r/20250422-stmmac_ts-v1-0-b59c9f406041@bootlin.com
Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
====================
Link: https://patch.msgid.link/20250423-stmmac_ts-v2-0-e2cf2bbd61b1@bootlin.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
The current way of reading a timestamp snapshot in stmmac can lead to
integer overflow, as the computation is done on 32 bits. The issue has
been observed on a dwmac-socfpga platform returning chaotic timestamp
values due to this overflow. The corresponding multiplication is done
with a MUL instruction, which returns 32 bit values. Explicitly casting
the value to 64 bits replaced the MUL with a UMLAL, which computes and
returns the result on 64 bits, and so returns correctly the timestamps.
Prevent this overflow by explicitly casting the intermediate value to
u64 to make sure that the whole computation is made on u64. While at it,
apply the same cast on the other dwmac variant (GMAC4) method for
snapshot retrieval.
Fixes: 477c3e1f63 ("net: stmmac: Introduce dwmac1000 timestamping operations")
Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20250423-stmmac_ts-v2-2-e2cf2bbd61b1@bootlin.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
When a PTP interrupt occurs, the driver accesses the wrong offset to
learn about the number of available snapshots in the FIFO for dwmac1000:
it should be accessing bits 29..25, while it is currently reading bits
19..16 (those are bits about the auxiliary triggers which have generated
the timestamps). As a consequence, it does not compute correctly the
number of available snapshots, and so possibly do not generate the
corresponding clock events if the bogus value ends up being 0.
Fix clock events generation by reading the correct bits in the timestamp
register for dwmac1000.
Fixes: 477c3e1f63 ("net: stmmac: Introduce dwmac1000 timestamping operations")
Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20250423-stmmac_ts-v2-1-e2cf2bbd61b1@bootlin.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
When CONFIG_OF_MDIO is set to be a module the code block is not
compiled. Use the IS_ENABLED macro that checks for both built in as
well as module.
Fixes: 5dc39fd5ef ("net: phy: DP83822: Add ability to advertise Fiber connection")
Signed-off-by: Johannes Schneider <johannes.schneider@leica-geosystems.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20250423044724.1284492-1-johannes.schneider@leica-geosystems.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Make the wait_context a full part of the q_info struct rather
than a stack variable that goes away after pdsc_adminq_post()
is done so that the context is still available after the wait
loop has given up.
There was a case where a slow development firmware caused
the adminq request to time out, but then later the FW finally
finished the request and sent the interrupt. The handler tried
to complete_all() the completion context that had been created
on the stack in pdsc_adminq_post() but no longer existed.
This caused bad pointer usage, kernel crashes, and much wailing
and gnashing of teeth.
Fixes: 01ba61b55b ("pds_core: Add adminq processing and commands")
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250421174606.3892-5-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When the pds_core driver was first created there were some race
conditions around using the adminq, especially for client drivers.
To reduce the possibility of a race condition there's a check
against pf->state in pds_client_adminq_cmd(). This is problematic
for a couple of reasons:
1. The PDSC_S_INITING_DRIVER bit is set during probe, but not
cleared until after everything in probe is complete, which
includes creating the auxiliary devices. For pds_fwctl this
means it can't make any adminq commands until after pds_core's
probe is complete even though the adminq is fully up by the
time pds_fwctl's auxiliary device is created.
2. The race conditions around using the adminq have been fixed
and this path is already protected against client drivers
calling pds_client_adminq_cmd() if the adminq isn't ready,
i.e. see pdsc_adminq_post() -> pdsc_adminq_inc_if_up().
Fix this by removing the pf->state check in pds_client_adminq_cmd()
because invalid accesses to pds_core's adminq is already handled by
pdsc_adminq_post()->pdsc_adminq_inc_if_up().
Fixes: 10659034c6 ("pds_core: add the aux client API")
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250421174606.3892-4-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
If the FW doesn't support the PDS_CORE_CMD_FW_CONTROL command
the driver might at the least print garbage and at the worst
crash when the user runs the "devlink dev info" devlink command.
This happens because the stack variable fw_list is not 0
initialized which results in fw_list.num_fw_slots being a
garbage value from the stack. Then the driver tries to access
fw_list.fw_names[i] with i >= ARRAY_SIZE and runs off the end
of the array.
Fix this by initializing the fw_list and by not failing
completely if the devcmd fails because other useful information
is printed via devlink dev info even if the devcmd fails.
Fixes: 45d76f4929 ("pds_core: set up device and adminq")
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250421174606.3892-3-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The pds_core's adminq is protected by the adminq_lock, which prevents
more than 1 command to be posted onto it at any one time. This makes it
so the client drivers cannot simultaneously post adminq commands.
However, the completions happen in a different context, which means
multiple adminq commands can be posted sequentially and all waiting
on completion.
On the FW side, the backing adminq request queue is only 16 entries
long and the retry mechanism and/or overflow/stuck prevention is
lacking. This can cause the adminq to get stuck, so commands are no
longer processed and completions are no longer sent by the FW.
As an initial fix, prevent more than 16 outstanding adminq commands so
there's no way to cause the adminq from getting stuck. This works
because the backing adminq request queue will never have more than 16
pending adminq commands, so it will never overflow. This is done by
reducing the adminq depth to 16.
Fixes: 45d76f4929 ("pds_core: set up device and adminq")
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250421174606.3892-2-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
MT7531 standalone and MMIO variants found in MT7988 and EN7581 share
most basic properties. Despite that, assisted_learning_on_cpu_port and
mtu_enforcement_ingress were only applied for MT7531 but not for MT7988
or EN7581, causing the expected issues on MMIO devices.
Apply both settings equally also for MT7988 and EN7581 by moving both
assignments form mt7531_setup() to mt7531_setup_common().
This fixes unwanted flooding of packets due to unknown unicast
during DA lookup, as well as issues with heterogenous MTU settings.
Fixes: 7f54cc9772 ("net: dsa: mt7530: split-off common parts from mt7531_setup")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Chester A. Unal <chester.a.unal@arinc9.com>
Link: https://patch.msgid.link/89ed7ec6d4fa0395ac53ad2809742bb1ce61ed12.1745290867.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Cong Wang says:
====================
net_sched: Fix UAF vulnerability in HFSC qdisc
This patchset contains two bug fixes and a selftest for the first one
which we have a reliable reproducer, please check each patch
description for details.
====================
Link: https://patch.msgid.link/20250417184732.943057-1-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add a selftest to exercise the condition where qdisc implementations
like netem or codel might empty the queue during a peek operation.
This tests the defensive code path in HFSC that checks the queue length
again after peeking to handle this case.
Based on the reproducer from Gerrard, improved by Jamal.
Reported-by: Gerrard Tai <gerrard.tai@starlabs.sg>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Tested-by: Victor Nogueira <victor@mojatatu.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20250417184732.943057-4-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Similarly to the previous patch, we need to safe guard hfsc_dequeue()
too. But for this one, we don't have a reliable reproducer.
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: Gerrard Tai <gerrard.tai@starlabs.sg>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20250417184732.943057-3-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class
handling. The issue occurs due to a time-of-check/time-of-use condition
in hfsc_change_class() when working with certain child qdiscs like netem
or codel.
The vulnerability works as follows:
1. hfsc_change_class() checks if a class has packets (q.qlen != 0)
2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g.,
codel, netem) might drop packets and empty the queue
3. The code continues assuming the queue is still non-empty, adding
the class to vttree
4. This breaks HFSC scheduler assumptions that only non-empty classes
are in vttree
5. Later, when the class is destroyed, this can lead to a Use-After-Free
The fix adds a second queue length check after qdisc_peek_len() to verify
the queue wasn't emptied.
Fixes: 21f4d5cc25 ("net_sched/hfsc: fix curve activation in hfsc_change_class()")
Reported-by: Gerrard Tai <gerrard.tai@starlabs.sg>
Reviewed-by: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20250417184732.943057-2-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Matthieu Baerts says:
====================
mptcp: pm: Defer freeing userspace pm entries
Here are two unrelated fixes for MPTCP:
- Patch 1: free userspace PM entry with RCU helpers. A fix for v6.14.
- Patch 2: avoid a warning when running diag.sh selftest. A fix for
v6.15-rc1.
====================
Link: https://patch.msgid.link/20250421-net-mptcp-pm-defer-freeing-v1-0-e731dc6e86b9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When running diag.sh in a loop, chk_dump_one will report the following
"grep: write error":
13 ....chk 2 cestab [ OK ]
grep: write error
14 ....chk dump_one [ OK ]
15 ....chk 2->0 msk in use after flush [ OK ]
16 ....chk 2->0 cestab after flush [ OK ]
This error is caused by a broken pipe. When the output of 'ss' is processed
by grep, 'head -n 1' will exit immediately after getting the first line,
causing the subsequent pipe to close. At this time, if 'grep' is still
trying to write data to the closed pipe, it will trigger a SIGPIPE signal,
causing a write error.
One solution is not to use this problematic "head -n 1" command, but to use
mptcp_lib_get_info_value() helper defined in mptcp_lib.sh to get the value
of 'token'.
Fixes: ba24001665 ("selftests: mptcp: add a test for mptcp_diag_dump_one")
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Tested-by: Gang Yan <yangang@kylinos.cn>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250421-net-mptcp-pm-defer-freeing-v1-2-e731dc6e86b9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When path manager entries are deleted from the local address list, they
are first unlinked from the address list using list_del_rcu(). The
entries must not be freed until after the RCU grace period, but the
existing code immediately frees the entry.
Use kfree_rcu_mightsleep() and adjust sk_omem_alloc in open code instead
of using the sock_kfree_s() helper. This code path is only called in a
netlink handler, so the "might sleep" function is preferable to adding
a rarely-used rcu_head member to struct mptcp_pm_addr_entry.
Fixes: 88d0973163 ("mptcp: drop free_list for deleting entries")
Cc: stable@vger.kernel.org
Signed-off-by: Mat Martineau <martineau@kernel.org>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250421-net-mptcp-pm-defer-freeing-v1-1-e731dc6e86b9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This was triggered by one of my mis-uses causing odd build warnings on
sparc in linux-next, but while figuring out why the "obviously correct"
use of cc-option caused such odd breakage, I found eight other cases of
the same thing in the tree.
The root cause is that 'cc-option' doesn't work for checking negative
warning options (ie things like '-Wno-stringop-overflow') because gcc
will silently accept options it doesn't recognize, and so 'cc-option'
ends up thinking they are perfectly fine.
And it all works, until you have a situation where _another_ warning is
emitted. At that point the compiler will go "Hmm, maybe the user
intended to disable this warning but used that wrong option that I
didn't recognize", and generate a warning for the unrecognized negative
option.
Which explains why we have several cases of this in the tree: the
'cc-option' test really doesn't work for this situation, but most of the
time it simply doesn't matter that ity doesn't work.
The reason my recently added case caused problems on sparc was pointed
out by Thomas Weißschuh: the sparc build had a previous explicit warning
that then triggered the new one.
I think the best fix for this would be to make 'cc-option' a bit smarter
about this sitation, possibly by adding an intentional warning to the
test case that then triggers the unrecognized option warning reliably.
But the short-term fix is to replace 'cc-option' with an existing helper
designed for this exact case: 'cc-disable-warning', which picks the
negative warning but uses the positive form for testing the compiler
support.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/all/20250422204718.0b4e3f81@canb.auug.org.au/
Explained-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael Larabel reported [1] a nginx performance regression in v6.15-rc3
and bisected it to commit 51339d99c0 ("locking/local_lock, mm: replace
localtry_ helpers with local_trylock_t type")
The problem is the _Generic() usage with a default association that
masks the fact that "local_trylock_t *" association is not being
selected as expected. Replacing the default with the only other
expected type "local_lock_t *" reveals the underlying problem:
include/linux/local_lock_internal.h:174:26: error: ‘_Generic’ selector of type ‘__seg_gs local_lock_t *’ is not compatible with any association
The local_locki's are part of __percpu structures and thus the __percpu
attribute is needed to associate the type properly. Add the attribute
and keep the default replaced to turn any further mismatches into
compile errors.
The failure to recognize local_try_lock_t in __local_lock_release()
means that a local_trylock[_irqsave]() operation will set tl->acquired
to 1 (there's no _Generic() part in the trylock code), but then
local_unlock[_irqrestore]() will not set tl->acquired back to 0, so
further trylock operations will always fail on the same cpu+lock, while
non-trylock operations continue to work - a lockdep_assert() is also not
being executed in the _Generic() part of local_lock() code.
This means consume_stock() and refill_stock() operations will fail
deterministically, resulting in taking the slow paths and worse
performance.
Fixes: 51339d99c0 ("locking/local_lock, mm: replace localtry_ helpers with local_trylock_t type")
Reported-by: Michael Larabel <Michael@phoronix.com>
Closes: https://www.phoronix.com/review/linux-615-nginx-regression/2 [1]
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A small number of fixes.
virtgpu is exempt from reset shutdown fow now -
a more complete fix is in the works
spec compliance fixes in:
virtio-pci cap commands
vhost_scsi_send_bad_target
virtio console resize
missing locking fix in vhost-scsi
virtio ring - a KCSAN false positive fix
VHOST_*_OWNER documentation fix
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 fixes from Michael Tsirkin:
"A small number of fixes:
- virtgpu is exempt from reset shutdown fow now - a more complete fix
is in the works
- spec compliance fixes in:
- virtio-pci cap commands
- vhost_scsi_send_bad_target
- virtio console resize
- missing locking fix in vhost-scsi
- virtio ring - a KCSAN false positive fix
- VHOST_*_OWNER documentation fix"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost-scsi: Fix vhost_scsi_send_status()
vhost-scsi: Fix vhost_scsi_send_bad_target()
vhost-scsi: protect vq->log_used with vq->mutex
vhost_task: fix vhost_task_create() documentation
virtio_console: fix order of fields cols and rows
virtio_console: fix missing byte order handling for cols and rows
virtgpu: don't reset on shutdown
virtio_ring: Fix data race by tagging event_triggered as racy for KCSAN
vhost: fix VHOST_*_OWNER documentation
virtio_pci: Use self group type for cap commands
Change hardware configuration for the NETSYSv3.
- Enable PSE dummy page mechanism for the GDM1/2/3
- Enable PSE drop mechanism when the WDMA Rx ring full
- Enable PSE no-drop mechanism for packets from the WDMA Tx
- Correct PSE free drop threshold
- Correct PSE CDMA high threshold
Fixes: 1953f134a1 ("net: ethernet: mtk_eth_soc: add NETSYS_V3 version support")
Signed-off-by: Bo-Cun Chen <bc-bocun.chen@mediatek.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/b71f8fd9d4bb69c646c4d558f9331dd965068606.1744907886.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
According to the review by Bill Cox [1], the Atmel SHA204A random number
generator produces random numbers with very low entropy.
Set the lowest possible entropy for this chip just to be safe.
[1] https://www.metzdowd.com/pipermail/cryptography/2014-December/023858.html
Fixes: da001fb651 ("crypto: atmel-i2c - add support for SHA204A random number generator")
Cc: <stable@vger.kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Fix off-by-one bug in the last page calculation for src and dst.
Reported-by: Nhat Pham <nphamcs@gmail.com>
Fixes: 2d3553ecb4 ("crypto: scomp - Remove support for some non-trivial SG lists")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
When pausing rx (e.g. set up xdp, xsk pool, rx resize), we call
napi_disable() on the receive queue's napi. In delayed refill_work, it
also calls napi_disable() on the receive queue's napi. When
napi_disable() is called on an already disabled napi, it will sleep in
napi_disable_locked while still holding the netdev_lock. As a result,
later napi_enable gets stuck too as it cannot acquire the netdev_lock.
This leads to refill_work and the pause-then-resume tx are stuck
altogether.
This scenario can be reproducible by binding a XDP socket to virtio-net
interface without setting up the fill ring. As a result, try_fill_recv
will fail until the fill ring is set up and refill_work is scheduled.
This commit adds virtnet_rx_(pause/resume)_all helpers and fixes up the
virtnet_rx_resume to disable future and cancel all inflights delayed
refill_work before calling napi_disable() to pause the rx.
Fixes: 413f0271f3 ("net: protect NAPI enablement with netdev_lock()")
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://patch.msgid.link/20250417072806.18660-2-minhquangbui99@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
A network restart test on a router led to an out-of-memory condition,
which was traced to a memory leak in the PHY LED trigger code.
The root cause is misuse of the devm API. The registration function
(phy_led_triggers_register) is called from phy_attach_direct, not
phy_probe, and the unregister function (phy_led_triggers_unregister)
is called from phy_detach, not phy_remove. This means the register and
unregister functions can be called multiple times for the same PHY
device, but devm-allocated memory is not freed until the driver is
unbound.
This also prevents kmemleak from detecting the leak, as the devm API
internally stores the allocated pointer.
Fix this by replacing devm_kzalloc/devm_kcalloc with standard
kzalloc/kcalloc, and add the corresponding kfree calls in the unregister
path.
Fixes: 3928ee6485 ("net: phy: leds: Add support for "link" trigger")
Fixes: 2e0bc452f4 ("net: phy: leds: add support for led triggers on phy link state change")
Signed-off-by: Hao Guan <hao.guan@siflower.com.cn>
Signed-off-by: Qingfang Deng <qingfang.deng@siflower.com.cn>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250417032557.2929427-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
As a result of an email from the fbnic author, I reviewed the phylink
documentation, and I have decided to clarify the wording in the
mac_link_(up|down)() kernel documentation as this was written from the
point of view of mvneta/mvpp2 and is misleading.
The documentation talks about forcing the link - indeed, this is what
is done in the mvneta and mvpp2 drivers but not at the physical layer
but the MACs idea, which has the effect of only allowing or stopping
packet flow at the MAC. This "link" needs to be controlled when using
a PHY or fixed link to start or stop packet flow at the MAC. However,
as the MAC and PCS are tightly integrated, if the MACs idea of the
link is forced down, it has the side effect that there is no way to
determine that the media link has come up - in this mode, the MAC must
be allowed to follow its built-in PCS so we can read the link state.
Frame the documentation in more generic terms, to avoid the thought
that the physical media link to the partner needs in some way to be
forced up or down with these calls; it does not. If that were to be
done, it would be a self-fulfilling prophecy - e.g. if the media link
goes down, then mac_link_down() will be called, and if the media link
is then placed into a forced down state, there is no possibility
that the media link will ever come up again - clearly this is a wrong
interpretation.
These methods are notifications to the MAC about what has happened to
the media link state - either from the PHY, or a PCS, or whatever
mechanism fixed-link is using. Thus, reword them to get away from
talking about changing link state to avoid confusion with media link
state.
This is not a change of any requirements of these methods.
Also, remove the obsolete references to EEE for these methods, we now
have the LPI functions for configuring the EEE parameters which
renders this redundant, and also makes the passing of "phy" to the
mac_link_up() function obsolete.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/E1u5Ah5-001GO1-7E@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When WoL is enabled, we update the software state in phylink to
indicate that the link is down, and disable the resolver from
bringing the link back up.
On resume, we attempt to bring the overall state into consistency
by calling the .mac_link_down() method, but this is wrong if the
link was already down, as phylink strictly orders the .mac_link_up()
and .mac_link_down() methods - and this would break that ordering.
Fixes: f97493657c ("net: phylink: add suspend/resume support")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1u55Qf-0016RN-PA@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'for-6.15-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
- subpage mode fixes:
- access correct object (folio) when looking up bit offset
- fix assertion condition for number of blocks per folio
- fix upper boundary of locking range in hole punch
- zoned fixes:
- fix potential deadlock caught by lockdep when zone reporting and
device freeze run in parallel
- fix zone write pointer mismatch and NULL pointer dereference when
metadata are converted from DUP to RAID1
- fix error handling when reloc inode creation fails
- in tree-checker, unify error code for header level check
- block layer: add helpers to read zone capacity
* tag 'for-6.15-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: zoned: skip reporting zone for new block group
block: introduce zone capacity helper
btrfs: tree-checker: adjust error code for header level check
btrfs: fix invalid inode pointer after failure to create reloc inode
btrfs: zoned: return EIO on RAID1 block group write pointer mismatch
btrfs: fix the ASSERT() inside GET_SUBPAGE_BITMAP()
btrfs: avoid page_lockend underflow in btrfs_punch_hole_lock_range()
btrfs: subpage: access correct object when reading bitmap start in subpage_calc_start_bit()
