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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"Lockdep:
- Enable PROVE_RAW_LOCK_NESTING with PROVE_LOCKING (Sebastian Andrzej
Siewior)
- Add lockdep_cleanup_dead_cpu() (David Woodhouse)
futexes:
- Use atomic64_inc_return() in get_inode_sequence_number() (Uros
Bizjak)
- Use atomic64_try_cmpxchg_relaxed() in get_inode_sequence_number()
(Uros Bizjak)
RT locking:
- Add sparse annotation PREEMPT_RT's locking (Sebastian Andrzej
Siewior)
spinlocks:
- Use atomic_try_cmpxchg_release() in osq_unlock() (Uros Bizjak)
atomics:
- x86: Use ALT_OUTPUT_SP() for __alternative_atomic64() (Uros Bizjak)
- x86: Use ALT_OUTPUT_SP() for __arch_{,try_}cmpxchg64_emu() (Uros
Bizjak)
KCSAN, seqlocks:
- Support seqcount_latch_t (Marco Elver)
<linux/cleanup.h>:
- Add if_not_guard() conditional guard helper (David Lechner)
- Adjust scoped_guard() macros to avoid potential warning (Przemek
Kitszel)
- Remove address space of returned pointer (Uros Bizjak)
WW mutexes:
- locking/ww_mutex: Adjust to lockdep nest_lock requirements (Thomas
Hellström)
Rust integration:
- Fix raw_spin_lock initialization on PREEMPT_RT (Eder Zulian)
Misc cleanups & fixes:
- lockdep: Fix wait-type check related warnings (Ahmed Ehab)
- lockdep: Use info level for initial info messages (Jiri Slaby)
- spinlocks: Make __raw_* lock ops static (Geert Uytterhoeven)
- pvqspinlock: Convert fields of 'enum vcpu_state' to uppercase
(Qiuxu Zhuo)
- iio: magnetometer: Fix if () scoped_guard() formatting (Stephen
Rothwell)
- rtmutex: Fix misleading comment (Peter Zijlstra)
- percpu-rw-semaphores: Fix grammar in percpu-rw-semaphore.rst (Xiu
Jianfeng)"
* tag 'locking-core-2024-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (29 commits)
locking/Documentation: Fix grammar in percpu-rw-semaphore.rst
iio: magnetometer: fix if () scoped_guard() formatting
rust: helpers: Avoid raw_spin_lock initialization for PREEMPT_RT
kcsan, seqlock: Fix incorrect assumption in read_seqbegin()
seqlock, treewide: Switch to non-raw seqcount_latch interface
kcsan, seqlock: Support seqcount_latch_t
time/sched_clock: Broaden sched_clock()'s instrumentation coverage
time/sched_clock: Swap update_clock_read_data() latch writes
locking/atomic/x86: Use ALT_OUTPUT_SP() for __arch_{,try_}cmpxchg64_emu()
locking/atomic/x86: Use ALT_OUTPUT_SP() for __alternative_atomic64()
cleanup: Add conditional guard helper
cleanup: Adjust scoped_guard() macros to avoid potential warning
locking/osq_lock: Use atomic_try_cmpxchg_release() in osq_unlock()
cleanup: Remove address space of returned pointer
locking/rtmutex: Fix misleading comment
locking/rt: Annotate unlock followed by lock for sparse.
locking/rt: Add sparse annotation for RCU.
locking/rt: Remove one __cond_lock() in RT's spin_trylock_irqsave()
locking/rt: Add sparse annotation PREEMPT_RT's sleeping locks.
locking/pvqspinlock: Convert fields of 'enum vcpu_state' to uppercase
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git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator updates from Jason Donenfeld:
"This contains a single series from Uros to replace uses of
<linux/random.h> with prandom.h or other more specific headers
as needed, in order to avoid a circular header issue.
Uros' goal is to be able to use percpu.h from prandom.h, which
will then allow him to define __percpu in percpu.h rather than
in compiler_types.h"
* tag 'random-6.13-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
prandom: Include <linux/percpu.h> in <linux/prandom.h>
random: Do not include <linux/prandom.h> in <linux/random.h>
netem: Include <linux/prandom.h> in sch_netem.c
lib/test_scanf: Include <linux/prandom.h> instead of <linux/random.h>
lib/test_parman: Include <linux/prandom.h> instead of <linux/random.h>
bpf/tests: Include <linux/prandom.h> instead of <linux/random.h>
lib/rbtree-test: Include <linux/prandom.h> instead of <linux/random.h>
random32: Include <linux/prandom.h> instead of <linux/random.h>
kunit: string-stream-test: Include <linux/prandom.h>
lib/interval_tree_test.c: Include <linux/prandom.h> instead of <linux/random.h>
bpf: Include <linux/prandom.h> instead of <linux/random.h>
scsi: libfcoe: Include <linux/prandom.h> instead of <linux/random.h>
fscrypt: Include <linux/once.h> in fs/crypto/keyring.c
mtd: tests: Include <linux/prandom.h> instead of <linux/random.h>
media: vivid: Include <linux/prandom.h> in vivid-vid-cap.c
drm/lib: Include <linux/prandom.h> instead of <linux/random.h>
drm/i915/selftests: Include <linux/prandom.h> instead of <linux/random.h>
crypto: testmgr: Include <linux/prandom.h> instead of <linux/random.h>
x86/kaslr: Include <linux/prandom.h> instead of <linux/random.h>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Add sig driver API
- Remove signing/verification from akcipher API
- Move crypto_simd_disabled_for_test to lib/crypto
- Add WARN_ON for return values from driver that indicates memory
corruption
Algorithms:
- Provide crc32-arch and crc32c-arch through Crypto API
- Optimise crc32c code size on x86
- Optimise crct10dif on arm/arm64
- Optimise p10-aes-gcm on powerpc
- Optimise aegis128 on x86
- Output full sample from test interface in jitter RNG
- Retry without padata when it fails in pcrypt
Drivers:
- Add support for Airoha EN7581 TRNG
- Add support for STM32MP25x platforms in stm32
- Enable iproc-r200 RNG driver on BCMBCA
- Add Broadcom BCM74110 RNG driver"
* tag 'v6.13-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (112 commits)
crypto: marvell/cesa - fix uninit value for struct mv_cesa_op_ctx
crypto: cavium - Fix an error handling path in cpt_ucode_load_fw()
crypto: aesni - Move back to module_init
crypto: lib/mpi - Export mpi_set_bit
crypto: aes-gcm-p10 - Use the correct bit to test for P10
hwrng: amd - remove reference to removed PPC_MAPLE config
crypto: arm/crct10dif - Implement plain NEON variant
crypto: arm/crct10dif - Macroify PMULL asm code
crypto: arm/crct10dif - Use existing mov_l macro instead of __adrl
crypto: arm64/crct10dif - Remove remaining 64x64 PMULL fallback code
crypto: arm64/crct10dif - Use faster 16x64 bit polynomial multiply
crypto: arm64/crct10dif - Remove obsolete chunking logic
crypto: bcm - add error check in the ahash_hmac_init function
crypto: caam - add error check to caam_rsa_set_priv_key_form
hwrng: bcm74110 - Add Broadcom BCM74110 RNG driver
dt-bindings: rng: add binding for BCM74110 RNG
padata: Clean up in padata_do_multithreaded()
crypto: inside-secure - Fix the return value of safexcel_xcbcmac_cra_init()
crypto: qat - Fix missing destroy_workqueue in adf_init_aer()
crypto: rsassa-pkcs1 - Reinstate support for legacy protocols
...
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- Add firmware sysfs interface which allows user space to retrieve the
dump area size of the machine
- Add 'measurement_chars_full' CHPID sysfs attribute to make the
complete associated Channel-Measurements Characteristics Block
available
- Add virtio-mem support
- Move gmap aka KVM page fault handling from the main fault handler to
KVM code. This is the first step to make s390 KVM page fault handling
similar to other architectures. With this first step the main fault
handler does not have any special handling anymore, and therefore
convert it to support LOCK_MM_AND_FIND_VMA
- With gcc 14 s390 support for flag output operand support for inline
assemblies was added. This allows for several optimizations:
- Provide a cmpxchg inline assembly which makes use of this, and
provide all variants of arch_try_cmpxchg() so that the compiler
can generate slightly better code
- Convert a few cmpxchg() loops to try_cmpxchg() loops
- Similar to x86 add a CC_OUT() helper macro (and other macros),
and convert all inline assemblies to make use of them, so that
depending on compiler version better code can be generated
- List installed host-key hashes in sysfs if the machine supports the
Query Ultravisor Keys UVC
- Add 'Retrieve Secret' ioctl which allows user space in protected
execution guests to retrieve previously stored secrets from the
Ultravisor
- Add pkey-uv module which supports the conversion of Ultravisor
retrievable secrets to protected keys
- Extend the existing paes cipher to exploit the full AES-XTS hardware
acceleration introduced with message-security assist extension 10
- Convert hopefully all sysfs show functions to use sysfs_emit() so
that the constant flow of such patches stop
- For PCI devices make use of the newly added Topology ID attribute to
enable whole card multi-function support despite the change to PCHID
per port. Additionally improve the overall robustness and usability
of the multifunction support
- Various other small improvements, fixes, and cleanups
* tag 's390-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (133 commits)
s390/cio/ioasm: Convert to use flag output macros
s390/cio/qdio: Convert to use flag output macros
s390/sclp: Convert to use flag output macros
s390/dasd: Convert to use flag output macros
s390/boot/physmem: Convert to use flag output macros
s390/pci: Convert to use flag output macros
s390/kvm: Convert to use flag output macros
s390/extmem: Convert to use flag output macros
s390/string: Convert to use flag output macros
s390/diag: Convert to use flag output macros
s390/irq: Convert to use flag output macros
s390/smp: Convert to use flag output macros
s390/uv: Convert to use flag output macros
s390/pai: Convert to use flag output macros
s390/mm: Convert to use flag output macros
s390/cpu_mf: Convert to use flag output macros
s390/cpcmd: Convert to use flag output macros
s390/topology: Convert to use flag output macros
s390/time: Convert to use flag output macros
s390/pageattr: Convert to use flag output macros
...
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Pull block updates from Jens Axboe:
- NVMe updates via Keith:
- Use uring_cmd helper (Pavel)
- Host Memory Buffer allocation enhancements (Christoph)
- Target persistent reservation support (Guixin)
- Persistent reservation tracing (Guixen)
- NVMe 2.1 specification support (Keith)
- Rotational Meta Support (Matias, Wang, Keith)
- Volatile cache detection enhancment (Guixen)
- MD updates via Song:
- Maintainers update
- raid5 sync IO fix
- Enhance handling of faulty and blocked devices
- raid5-ppl atomic improvement
- md-bitmap fix
- Support for manually defining embedded partition tables
- Zone append fixes and cleanups
- Stop sending the queued requests in the plug list to the driver
->queue_rqs() handle in reverse order.
- Zoned write plug cleanups
- Cleanups disk stats tracking and add support for disk stats for
passthrough IO
- Add preparatory support for file system atomic writes
- Add lockdep support for queue freezing. Already found a bunch of
issues, and some fixes for that are in here. More will be coming.
- Fix race between queue stopping/quiescing and IO queueing
- ublk recovery improvements
- Fix ublk mmap for 64k pages
- Various fixes and cleanups
* tag 'for-6.13/block-20241118' of git://git.kernel.dk/linux: (118 commits)
MAINTAINERS: Update git tree for mdraid subsystem
block: make struct rq_list available for !CONFIG_BLOCK
block/genhd: use seq_put_decimal_ull for diskstats decimal values
block: don't reorder requests in blk_mq_add_to_batch
block: don't reorder requests in blk_add_rq_to_plug
block: add a rq_list type
block: remove rq_list_move
virtio_blk: reverse request order in virtio_queue_rqs
nvme-pci: reverse request order in nvme_queue_rqs
btrfs: validate queue limits
block: export blk_validate_limits
nvmet: add tracing of reservation commands
nvme: parse reservation commands's action and rtype to string
nvmet: report ns's vwc not present
md/raid5: Increase r5conf.cache_name size
block: remove the ioprio field from struct request
block: remove the write_hint field from struct request
nvme: check ns's volatile write cache not present
nvme: add rotational support
nvme: use command set independent id ns if available
...
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This function is part of the exposed API and should be exported.
Otherwise a modular user would fail to build, e.g., crypto/rsa.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Since gfp & GFP_ATOMIC == GFP_ATOMIC is true for GFP_KERNEL | GFP_HIGH, it
will use kmalloc if user specifies that combination. Here the reason why
combining the __vmalloc_node() and kmalloc_node() is that the vmalloc does
not support all GFP flag, especially GFP_ATOMIC. So we should check if
gfp & (GFP_ATOMIC | GFP_KERNEL) != GFP_ATOMIC for vmalloc first. This
ensures caller can sleep. And for the robustness, even if vmalloc fails,
it should retry with kmalloc to allocate it.
Link: https://lkml.kernel.org/r/173008598713.1262174.2959179484209897252.stgit@mhiramat.roam.corp.google.com
Fixes: aff1871bfc81 ("objpool: fix choosing allocation for percpu slots")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Closes: https://lore.kernel.org/all/CAHk-=whO+vSH+XVRio8byJU8idAWES0SPGVZ7KAVdc4qrV0VUA@mail.gmail.com/
Cc: Leo Yan <leo.yan@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Wu <wuqiang.matt@bytedance.com>
Cc: Mikel Rychliski <mikel@mikelr.com>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Viktor Malik <vmalik@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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virtio-mem currently depends on !DEVMEM | STRICT_DEVMEM. Let's default
STRICT_DEVMEM to "y" just like we do for arm64 and x86.
There could be ways in the future to filter access to virtio-mem device
memory even without STRICT_DEVMEM, but for now let's just keep it
simple.
Tested-by: Mario Casquero <mcasquer@redhat.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Tested-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Link: https://lore.kernel.org/r/20241025141453.1210600-6-david@redhat.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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.bi_size of bvec iterator should be initialized as real max size for
walking, and .bi_bvec_done just counts how many bytes need to be
skipped in the 1st bvec, so .bi_size isn't related with .bi_bvec_done.
This patch fixes bvec iterator initialization, and the inner `size`
check isn't needed any more, so revert Eric Dumazet's commit
7bc802acf193 ("iov-iter: do not return more bytes than requested in
iov_iter_extract_bvec_pages()").
Cc: Eric Dumazet <edumazet@google.com>
Fixes: e4e535bff2bc ("iov_iter: don't require contiguous pages in iov_iter_extract_bvec_pages")
Reported-by: syzbot+71abe7ab2b70bca770fd@syzkaller.appspotmail.com
Tested-by: syzbot+71abe7ab2b70bca770fd@syzkaller.appspotmail.com
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"The important one is a change to the way in which we handle protection
keys around signal delivery so that we're more closely aligned with
the x86 behaviour, however there is also a revert of the previous fix
to disable software tag-based KASAN with GCC, since a workaround
materialised shortly afterwards.
I'd love to say we're done with 6.12, but we're aware of some
longstanding fpsimd register corruption issues that we're almost at
the bottom of resolving.
Summary:
- Fix handling of POR_EL0 during signal delivery so that pushing the
signal context doesn't fail based on the pkey configuration of the
interrupted context and align our user-visible behaviour with that
of x86.
- Fix a bogus pointer being passed to the CPU hotplug code from the
Arm SDEI driver.
- Re-enable software tag-based KASAN with GCC by using an alternative
implementation of '__no_sanitize_address'"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: signal: Improve POR_EL0 handling to avoid uaccess failures
firmware: arm_sdei: Fix the input parameter of cpuhp_remove_state()
Revert "kasan: Disable Software Tag-Based KASAN with GCC"
kasan: Fix Software Tag-Based KASAN with GCC
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gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs
Pull filesystem fixes from Christian Brauner:
"VFS:
- Fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP=y is set
- Add a get_tree_bdev_flags() helper that allows to modify e.g.,
whether errors are logged into the filesystem context during
superblock creation. This is used by erofs to fix a userspace
regression where an error is currently logged when its used on a
regular file which is an new allowed mode in erofs.
netfs:
- Fix the sysfs debug path in the documentation.
- Fix iov_iter_get_pages*() for folio queues by skipping the page
extracation if we're at the end of a folio.
afs:
- Fix moving subdirectories to different parent directory.
autofs:
- Fix handling of AUTOFS_DEV_IOCTL_TIMEOUT_CMD ioctl in
validate_dev_ioctl(). The actual ioctl number, not the ioctl
command needs to be checked for autofs"
* tag 'vfs-6.12-rc6.fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs:
iov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP
autofs: fix thinko in validate_dev_ioctl()
iov_iter: Fix iov_iter_get_pages*() for folio_queue
afs: Fix missing subdir edit when renamed between parent dirs
doc: correcting the debug path for cachefiles
erofs: use get_tree_bdev_flags() to avoid misleading messages
fs/super.c: introduce get_tree_bdev_flags()
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Initialize bi.bi_idx as 0 before iterating over bvec, otherwise
garbage data can be used as ->bi_idx.
Cc: Christoph Hellwig <hch@lst.de>
Reported-and-tested-by: Klara Modin <klarasmodin@gmail.com>
Fixes: e4e535bff2bc ("iov_iter: don't require contiguous pages in iov_iter_extract_bvec_pages")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab fixes from Vlastimil Babka:
- Fix for a slub_kunit test warning with MEM_ALLOC_PROFILING_DEBUG (Pei
Xiao)
- Fix for a MTE-based KASAN BUG in krealloc() (Qun-Wei Lin)
* tag 'slab-for-6.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
mm: krealloc: Fix MTE false alarm in __do_krealloc
slub/kunit: fix a WARNING due to unwrapped __kmalloc_cache_noprof
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The iov_iter_extract_pages interface allows to return physically
discontiguous pages, as long as all but the first and last page
in the array are page aligned and page size. Rewrite
iov_iter_extract_bvec_pages to take advantage of that instead of only
returning ranges of physically contiguous pages.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
[hch: minor cleanups, new commit log]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241024050021.627350-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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generic/077 on x86_32 CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y with highmem,
on huge=always tmpfs, issues a warning and then hangs (interruptibly):
WARNING: CPU: 5 PID: 3517 at mm/highmem.c:622 kunmap_local_indexed+0x62/0xc9
CPU: 5 UID: 0 PID: 3517 Comm: cp Not tainted 6.12.0-rc4 #2
...
copy_page_from_iter_atomic+0xa6/0x5ec
generic_perform_write+0xf6/0x1b4
shmem_file_write_iter+0x54/0x67
Fix copy_page_from_iter_atomic() by limiting it in that case
(include/linux/skbuff.h skb_frag_must_loop() does similar).
But going forward, perhaps CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP is too
surprising, has outlived its usefulness, and should just be removed?
Fixes: 908a1ad89466 ("iov_iter: Handle compound highmem pages in copy_page_from_iter_atomic()")
Signed-off-by: Hugh Dickins <hughd@google.com>
Link: https://lore.kernel.org/r/dd5f0c89-186e-18e1-4f43-19a60f5a9774@google.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Move crypto_simd_disabled_for_test to lib/ so that crypto_simd_usable()
can be used by library code.
This was discussed previously
(https://lore.kernel.org/linux-crypto/20220716062920.210381-4-ebiggers@kernel.org/)
but was not done because there was no use case yet. However, this is
now needed for the arm64 CRC32 library code.
Tested with:
export ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
echo CONFIG_CRC32=y > .config
echo CONFIG_MODULES=y >> .config
echo CONFIG_CRYPTO=m >> .config
echo CONFIG_DEBUG_KERNEL=y >> .config
echo CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=n >> .config
echo CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y >> .config
make olddefconfig
make -j$(nproc)
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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crc32c-generic is currently backed by the architecture's CRC-32c library
code, which may offer a variety of implementations depending on the
capabilities of the platform. These are not covered by the crypto
subsystem's fuzz testing capabilities because crc32c-generic is the
reference driver that the fuzzing logic uses as a source of truth.
Fix this by providing a crc32c-arch implementation which is based on the
arch library code if available, and modify crc32c-generic so it is
always based on the generic C implementation. If the arch has no CRC-32c
library code, this change does nothing.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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crc32-generic is currently backed by the architecture's CRC-32 library
code, which may offer a variety of implementations depending on the
capabilities of the platform. These are not covered by the crypto
subsystem's fuzz testing capabilities because crc32-generic is the
reference driver that the fuzzing logic uses as a source of truth.
Fix this by providing a crc32-arch implementation which is based on the
arch library code if available, and modify crc32-generic so it is
always based on the generic C implementation. If the arch has no CRC-32
library code, this change does nothing.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes fixes from Masami Hiramatsu:
- objpool: Fix choosing allocation for percpu slots
Fixes to allocate objpool's percpu slots correctly according to the
GFP flag. It checks whether "any bit" in GFP_ATOMIC is set to choose
the vmalloc source, but it should check "all bits" in GFP_ATOMIC flag
is set, because GFP_ATOMIC is a combined flag.
- tracing/probes: Fix MAX_TRACE_ARGS limit handling
If more than MAX_TRACE_ARGS are passed for creating a probe event,
the entries over MAX_TRACE_ARG in trace_arg array are not
initialized. Thus if the kernel accesses those entries, it crashes.
This rejects creating event if the number of arguments is over
MAX_TRACE_ARGS.
- tracing: Consider the NUL character when validating the event length
A strlen() is used when parsing the event name, and the original code
does not consider the terminal null byte. Thus it can pass the name
one byte longer than the buffer. This fixes to check it correctly.
* tag 'probes-fixes-v6.12-rc4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing: Consider the NULL character when validating the event length
tracing/probes: Fix MAX_TRACE_ARGS limit handling
objpool: fix choosing allocation for percpu slots
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p9_get_mapped_pages() uses iov_iter_get_pages_alloc2() to extract pages
from an iterator when performing a zero-copy request and under some
circumstances, this crashes with odd page errors[1], for example, I see:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbcf0
flags: 0x2000000000000000(zone=1)
...
page dumped because: VM_BUG_ON_FOLIO(((unsigned int) folio_ref_count(folio) + 127u <= 127u))
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1444!
This is because, unlike in iov_iter_extract_folioq_pages(), the
iter_folioq_get_pages() helper function doesn't skip the current folio
when iov_offset points to the end of it, but rather extracts the next
page beyond the end of the folio and adds it to the list. Reading will
then clobber the contents of this page, leading to system corruption,
and if the page is not in use, put_page() may try to clean up the unused
page.
This can be worked around by copying the iterator before each
extraction[2] and using iov_iter_advance() on the original as the
advance function steps over the page we're at the end of.
Fix this by skipping the page extraction if we're at the end of the
folio.
This was reproduced in the ktest environment[3] by forcing 9p to use the
fscache caching mode and then reading a file through 9p.
Fixes: db0aa2e9566f ("mm: Define struct folio_queue and ITER_FOLIOQ to handle a sequence of folios")
Reported-by: Antony Antony <antony@phenome.org>
Closes: https://lore.kernel.org/r/ZxFQw4OI9rrc7UYc@Antony2201.local/
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Eric Van Hensbergen <ericvh@kernel.org>
cc: Latchesar Ionkov <lucho@ionkov.net>
cc: Dominique Martinet <asmadeus@codewreck.org>
cc: Christian Schoenebeck <linux_oss@crudebyte.com>
cc: v9fs@lists.linux.dev
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/ZxFEi1Tod43pD6JC@moon.secunet.de/ [1]
Link: https://lore.kernel.org/r/2299159.1729543103@warthog.procyon.org.uk/ [2]
Link: https://github.com/koverstreet/ktest.git [3]
Tested-by: Antony Antony <antony.antony@secunet.com>
Link: https://lore.kernel.org/r/3327438.1729678025@warthog.procyon.org.uk
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
|
This reverts commit 7aed6a2c51ffc97a126e0ea0c270fab7af97ae18.
Now that __no_sanitize_address attribute is fixed for KASAN_SW_TAGS with
GCC, allow re-enabling KASAN_SW_TAGS with GCC.
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrew Pinski <pinskia@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Link: https://lore.kernel.org/r/20241021120013.3209481-2-elver@google.com
Signed-off-by: Will Deacon <will@kernel.org>
|
|
'modprobe slub_kunit' will have a warning as shown below. The root cause
is that __kmalloc_cache_noprof was directly used, which resulted in no
alloc_tag being allocated. This caused current->alloc_tag to be null,
leading to a warning in alloc_tag_add_check.
Let's add an alloc_hook layer to __kmalloc_cache_noprof specifically
within lib/slub_kunit.c, which is the only user of this internal slub
function outside kmalloc implementation itself.
[58162.947016] WARNING: CPU: 2 PID: 6210 at
./include/linux/alloc_tag.h:125 alloc_tagging_slab_alloc_hook+0x268/0x27c
[58162.957721] Call trace:
[58162.957919] alloc_tagging_slab_alloc_hook+0x268/0x27c
[58162.958286] __kmalloc_cache_noprof+0x14c/0x344
[58162.958615] test_kmalloc_redzone_access+0x50/0x10c [slub_kunit]
[58162.959045] kunit_try_run_case+0x74/0x184 [kunit]
[58162.959401] kunit_generic_run_threadfn_adapter+0x2c/0x4c [kunit]
[58162.959841] kthread+0x10c/0x118
[58162.960093] ret_from_fork+0x10/0x20
[58162.960363] ---[ end trace 0000000000000000 ]---
Signed-off-by: Pei Xiao <xiaopei01@kylinos.cn>
Fixes: a0a44d9175b3 ("mm, slab: don't wrap internal functions with alloc_hooks()")
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
|
|
objpool intends to use vmalloc for default (non-atomic) allocations of
percpu slots and objects. However, the condition checking if GFP flags
set any bit of GFP_ATOMIC is wrong b/c GFP_ATOMIC is a combination of bits
(__GFP_HIGH|__GFP_KSWAPD_RECLAIM) and so `pool->gfp & GFP_ATOMIC` will
be true if either bit is set. Since GFP_ATOMIC and GFP_KERNEL share the
___GFP_KSWAPD_RECLAIM bit, kmalloc will be used in cases when GFP_KERNEL
is specified, i.e. in all current usages of objpool.
This may lead to unexpected OOM errors since kmalloc cannot allocate
large amounts of memory.
For instance, objpool is used by fprobe rethook which in turn is used by
BPF kretprobe.multi and kprobe.session probe types. Trying to attach
these to all kernel functions with libbpf using
SEC("kprobe.session/*")
int kprobe(struct pt_regs *ctx)
{
[...]
}
fails on objpool slot allocation with ENOMEM.
Fix the condition to truly use vmalloc by default.
Link: https://lore.kernel.org/all/20240826060718.267261-1-vmalik@redhat.com/
Fixes: b4edb8d2d464 ("lib: objpool added: ring-array based lockless MPMC")
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Matt Wu <wuqiang.matt@bytedance.com>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu:
"Fix a regression in mpi that broke RSA"
* tag 'v6.12-p4' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: lib/mpi - Fix an "Uninitialized scalar variable" issue
|
|
Pull rust fixes from Miguel Ojeda:
"Toolchain and infrastructure:
- Fix several issues with the 'rustc-option' macro. It includes a
refactor from Masahiro of three '{cc,rust}-*' macros, which is not
a fix but avoids repeating the same commands (which would be
several lines in the case of 'rustc-option').
- Fix conditions for 'CONFIG_HAVE_CFI_ICALL_NORMALIZE_INTEGERS'. It
includes the addition of 'CONFIG_RUSTC_LLVM_VERSION', which is not
a fix but is needed for the actual fix.
And a trivial grammar fix"
* tag 'rust-fixes-6.12-2' of https://github.com/Rust-for-Linux/linux:
cfi: fix conditions for HAVE_CFI_ICALL_NORMALIZE_INTEGERS
kbuild: rust: add `CONFIG_RUSTC_LLVM_VERSION`
kbuild: fix issues with rustc-option
kbuild: refactor cc-option-yn, cc-disable-warning, rust-option-yn macros
lib/Kconfig.debug: fix grammar in RUST_BUILD_ASSERT_ALLOW
|
|
Pull bpf fixes from Daniel Borkmann:
- Fix BPF verifier to not affect subreg_def marks in its range
propagation (Eduard Zingerman)
- Fix a truncation bug in the BPF verifier's handling of
coerce_reg_to_size_sx (Dimitar Kanaliev)
- Fix the BPF verifier's delta propagation between linked registers
under 32-bit addition (Daniel Borkmann)
- Fix a NULL pointer dereference in BPF devmap due to missing rxq
information (Florian Kauer)
- Fix a memory leak in bpf_core_apply (Jiri Olsa)
- Fix an UBSAN-reported array-index-out-of-bounds in BTF parsing for
arrays of nested structs (Hou Tao)
- Fix build ID fetching where memory areas backing the file were
created with memfd_secret (Andrii Nakryiko)
- Fix BPF task iterator tid filtering which was incorrectly using pid
instead of tid (Jordan Rome)
- Several fixes for BPF sockmap and BPF sockhash redirection in
combination with vsocks (Michal Luczaj)
- Fix riscv BPF JIT and make BPF_CMPXCHG fully ordered (Andrea Parri)
- Fix riscv BPF JIT under CONFIG_CFI_CLANG to prevent the possibility
of an infinite BPF tailcall (Pu Lehui)
- Fix a build warning from resolve_btfids that bpf_lsm_key_free cannot
be resolved (Thomas Weißschuh)
- Fix a bug in kfunc BTF caching for modules where the wrong BTF object
was returned (Toke Høiland-Jørgensen)
- Fix a BPF selftest compilation error in cgroup-related tests with
musl libc (Tony Ambardar)
- Several fixes to BPF link info dumps to fill missing fields (Tyrone
Wu)
- Add BPF selftests for kfuncs from multiple modules, checking that the
correct kfuncs are called (Simon Sundberg)
- Ensure that internal and user-facing bpf_redirect flags don't overlap
(Toke Høiland-Jørgensen)
- Switch to use kvzmalloc to allocate BPF verifier environment (Rik van
Riel)
- Use raw_spinlock_t in BPF ringbuf to fix a sleep in atomic splat
under RT (Wander Lairson Costa)
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (38 commits)
lib/buildid: Handle memfd_secret() files in build_id_parse()
selftests/bpf: Add test case for delta propagation
bpf: Fix print_reg_state's constant scalar dump
bpf: Fix incorrect delta propagation between linked registers
bpf: Properly test iter/task tid filtering
bpf: Fix iter/task tid filtering
riscv, bpf: Make BPF_CMPXCHG fully ordered
bpf, vsock: Drop static vsock_bpf_prot initialization
vsock: Update msg_count on read_skb()
vsock: Update rx_bytes on read_skb()
bpf, sockmap: SK_DROP on attempted redirects of unsupported af_vsock
selftests/bpf: Add asserts for netfilter link info
bpf: Fix link info netfilter flags to populate defrag flag
selftests/bpf: Add test for sign extension in coerce_subreg_to_size_sx()
selftests/bpf: Add test for truncation after sign extension in coerce_reg_to_size_sx()
bpf: Fix truncation bug in coerce_reg_to_size_sx()
selftests/bpf: Assert link info uprobe_multi count & path_size if unset
bpf: Fix unpopulated path_size when uprobe_multi fields unset
selftests/bpf: Fix cross-compiling urandom_read
selftests/bpf: Add test for kfunc module order
...
|
|
With the printk issues solved, the last known splat created by
PROVE_RAW_LOCK_NESTING is gone.
Enable PROVE_RAW_LOCK_NESTING by default as part of PROVE_LOCKING. Keep
the defines around in case something serious pops up and it needs to be
disabled.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20241009161041.1018375-2-bigeasy@linutronix.de
|
|
Add a test case to ensure that no new name string literal will be
created in lockdep_set_subclass(), otherwise a warning will be triggered
in look_up_lock_class(). Add this to catch the problem in the future.
[boqun: Reword the title, replace #if with #ifdef and rename functions
and variables]
Signed-off-by: Ahmed Ehab <bottaawesome633@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/lkml/20240905011220.356973-1-bottaawesome633@gmail.com/
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"28 hotfixes. 13 are cc:stable. 23 are MM.
It is the usual shower of unrelated singletons - please see the
individual changelogs for details"
* tag 'mm-hotfixes-stable-2024-10-17-16-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (28 commits)
maple_tree: add regression test for spanning store bug
maple_tree: correct tree corruption on spanning store
mm/mglru: only clear kswapd_failures if reclaimable
mm/swapfile: skip HugeTLB pages for unuse_vma
selftests: mm: fix the incorrect usage() info of khugepaged
MAINTAINERS: add Jann as memory mapping/VMA reviewer
mm: swap: prevent possible data-race in __try_to_reclaim_swap
mm: khugepaged: fix the incorrect statistics when collapsing large file folios
MAINTAINERS: kasan, kcov: add bugzilla links
mm: don't install PMD mappings when THPs are disabled by the hw/process/vma
mm: huge_memory: add vma_thp_disabled() and thp_disabled_by_hw()
Docs/damon/maintainer-profile: update deprecated awslabs GitHub URLs
Docs/damon/maintainer-profile: add missing '_' suffixes for external web links
maple_tree: check for MA_STATE_BULK on setting wr_rebalance
mm: khugepaged: fix the arguments order in khugepaged_collapse_file trace point
mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets()
mm: remove unused stub for can_swapin_thp()
mailmap: add an entry for Andy Chiu
MAINTAINERS: add memory mapping/VMA co-maintainers
fs/proc: fix build with GCC 15 due to -Werror=unterminated-string-initialization
...
|
|
>From memfd_secret(2) manpage:
The memory areas backing the file created with memfd_secret(2) are
visible only to the processes that have access to the file descriptor.
The memory region is removed from the kernel page tables and only the
page tables of the processes holding the file descriptor map the
corresponding physical memory. (Thus, the pages in the region can't be
accessed by the kernel itself, so that, for example, pointers to the
region can't be passed to system calls.)
We need to handle this special case gracefully in build ID fetching
code. Return -EFAULT whenever secretmem file is passed to build_id_parse()
family of APIs. Original report and repro can be found in [0].
[0] https://lore.kernel.org/bpf/ZwyG8Uro%2FSyTXAni@ly-workstation/
Fixes: de3ec364c3c3 ("lib/buildid: add single folio-based file reader abstraction")
Reported-by: Yi Lai <yi1.lai@intel.com>
Suggested-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Link: https://lore.kernel.org/bpf/20241017175431.6183-A-hca@linux.ibm.com
Link: https://lore.kernel.org/bpf/20241017174713.2157873-1-andrii@kernel.org
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
- Disable software tag-based KASAN when compiling with GCC, as
functions are incorrectly instrumented leading to a crash early
during boot
- Fix pkey configuration for kernel threads when POE is enabled
- Fix invalid memory accesses in uprobes when targetting load-literal
instructions
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
kasan: Disable Software Tag-Based KASAN with GCC
Documentation/protection-keys: add AArch64 to documentation
arm64: set POR_EL0 for kernel threads
arm64: probes: Fix uprobes for big-endian kernels
arm64: probes: Fix simulate_ldr*_literal()
arm64: probes: Remove broken LDR (literal) uprobe support
|
|
Patch series "maple_tree: correct tree corruption on spanning store", v3.
There has been a nasty yet subtle maple tree corruption bug that appears
to have been in existence since the inception of the algorithm.
This bug seems far more likely to happen since commit f8d112a4e657
("mm/mmap: avoid zeroing vma tree in mmap_region()"), which is the point
at which reports started to be submitted concerning this bug.
We were made definitely aware of the bug thanks to the kind efforts of
Bert Karwatzki who helped enormously in my being able to track this down
and identify the cause of it.
The bug arises when an attempt is made to perform a spanning store across
two leaf nodes, where the right leaf node is the rightmost child of the
shared parent, AND the store completely consumes the right-mode node.
This results in mas_wr_spanning_store() mitakenly duplicating the new and
existing entries at the maximum pivot within the range, and thus maple
tree corruption.
The fix patch corrects this by detecting this scenario and disallowing the
mistaken duplicate copy.
The fix patch commit message goes into great detail as to how this occurs.
This series also includes a test which reliably reproduces the issue, and
asserts that the fix works correctly.
Bert has kindly tested the fix and confirmed it resolved his issues. Also
Mikhail Gavrilov kindly reported what appears to be precisely the same
bug, which this fix should also resolve.
This patch (of 2):
There has been a subtle bug present in the maple tree implementation from
its inception.
This arises from how stores are performed - when a store occurs, it will
overwrite overlapping ranges and adjust the tree as necessary to
accommodate this.
A range may always ultimately span two leaf nodes. In this instance we
walk the two leaf nodes, determine which elements are not overwritten to
the left and to the right of the start and end of the ranges respectively
and then rebalance the tree to contain these entries and the newly
inserted one.
This kind of store is dubbed a 'spanning store' and is implemented by
mas_wr_spanning_store().
In order to reach this stage, mas_store_gfp() invokes
mas_wr_preallocate(), mas_wr_store_type() and mas_wr_walk() in turn to
walk the tree and update the object (mas) to traverse to the location
where the write should be performed, determining its store type.
When a spanning store is required, this function returns false stopping at
the parent node which contains the target range, and mas_wr_store_type()
marks the mas->store_type as wr_spanning_store to denote this fact.
When we go to perform the store in mas_wr_spanning_store(), we first
determine the elements AFTER the END of the range we wish to store (that
is, to the right of the entry to be inserted) - we do this by walking to
the NEXT pivot in the tree (i.e. r_mas.last + 1), starting at the node we
have just determined contains the range over which we intend to write.
We then turn our attention to the entries to the left of the entry we are
inserting, whose state is represented by l_mas, and copy these into a 'big
node', which is a special node which contains enough slots to contain two
leaf node's worth of data.
We then copy the entry we wish to store immediately after this - the copy
and the insertion of the new entry is performed by mas_store_b_node().
After this we copy the elements to the right of the end of the range which
we are inserting, if we have not exceeded the length of the node (i.e.
r_mas.offset <= r_mas.end).
Herein lies the bug - under very specific circumstances, this logic can
break and corrupt the maple tree.
Consider the following tree:
Height
0 Root Node
/ \
pivot = 0xffff / \ pivot = ULONG_MAX
/ \
1 A [-----] ...
/ \
pivot = 0x4fff / \ pivot = 0xffff
/ \
2 (LEAVES) B [-----] [-----] C
^--- Last pivot 0xffff.
Now imagine we wish to store an entry in the range [0x4000, 0xffff] (note
that all ranges expressed in maple tree code are inclusive):
1. mas_store_gfp() descends the tree, finds node A at <=0xffff, then
determines that this is a spanning store across nodes B and C. The mas
state is set such that the current node from which we traverse further
is node A.
2. In mas_wr_spanning_store() we try to find elements to the right of pivot
0xffff by searching for an index of 0x10000:
- mas_wr_walk_index() invokes mas_wr_walk_descend() and
mas_wr_node_walk() in turn.
- mas_wr_node_walk() loops over entries in node A until EITHER it
finds an entry whose pivot equals or exceeds 0x10000 OR it
reaches the final entry.
- Since no entry has a pivot equal to or exceeding 0x10000, pivot
0xffff is selected, leading to node C.
- mas_wr_walk_traverse() resets the mas state to traverse node C. We
loop around and invoke mas_wr_walk_descend() and mas_wr_node_walk()
in turn once again.
- Again, we reach the last entry in node C, which has a pivot of
0xffff.
3. We then copy the elements to the left of 0x4000 in node B to the big
node via mas_store_b_node(), and insert the new [0x4000, 0xffff] entry
too.
4. We determine whether we have any entries to copy from the right of the
end of the range via - and with r_mas set up at the entry at pivot
0xffff, r_mas.offset <= r_mas.end, and then we DUPLICATE the entry at
pivot 0xffff.
5. BUG! The maple tree is corrupted with a duplicate entry.
This requires a very specific set of circumstances - we must be spanning
the last element in a leaf node, which is the last element in the parent
node.
spanning store across two leaf nodes with a range that ends at that shared
pivot.
A potential solution to this problem would simply be to reset the walk
each time we traverse r_mas, however given the rarity of this situation it
seems that would be rather inefficient.
Instead, this patch detects if the right hand node is populated, i.e. has
anything we need to copy.
We do so by only copying elements from the right of the entry being
inserted when the maximum value present exceeds the last, rather than
basing this on offset position.
The patch also updates some comments and eliminates the unused bool return
value in mas_wr_walk_index().
The work performed in commit f8d112a4e657 ("mm/mmap: avoid zeroing vma
tree in mmap_region()") seems to have made the probability of this event
much more likely, which is the point at which reports started to be
submitted concerning this bug.
The motivation for this change arose from Bert Karwatzki's report of
encountering mm instability after the release of kernel v6.12-rc1 which,
after the use of CONFIG_DEBUG_VM_MAPLE_TREE and similar configuration
options, was identified as maple tree corruption.
After Bert very generously provided his time and ability to reproduce this
event consistently, I was able to finally identify that the issue
discussed in this commit message was occurring for him.
Link: https://lkml.kernel.org/r/cover.1728314402.git.lorenzo.stoakes@oracle.com
Link: https://lkml.kernel.org/r/48b349a2a0f7c76e18772712d0997a5e12ab0a3b.1728314403.git.lorenzo.stoakes@oracle.com
Fixes: 54a611b60590 ("Maple Tree: add new data structure")
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reported-by: Bert Karwatzki <spasswolf@web.de>
Closes: https://lore.kernel.org/all/20241001023402.3374-1-spasswolf@web.de/
Tested-by: Bert Karwatzki <spasswolf@web.de>
Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Closes: https://lore.kernel.org/all/CABXGCsOPwuoNOqSMmAvWO2Fz4TEmPnjFj-b7iF+XFRu1h7-+Dg@mail.gmail.com/
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
It is possible for a bulk operation (MA_STATE_BULK is set) to enter the
new_end < mt_min_slots[type] case and set wr_rebalance as a store type.
This is incorrect as bulk stores do not rebalance per write, but rather
after the all of the writes are done through the mas_bulk_rebalance()
path. Therefore, add a check to make sure MA_STATE_BULK is not set before
we return wr_rebalance as the store type.
Also add a test to make sure wr_rebalance is never the store type when
doing bulk operations via mas_expected_entries()
This is a hotfix for this rc however it has no userspace effects as there
are no users of the bulk insertion mode.
Link: https://lkml.kernel.org/r/20241011214451.7286-1-sidhartha.kumar@oracle.com
Fixes: 5d659bbb52a2 ("maple_tree: introduce mas_wr_store_type()")
Suggested-by: Liam Howlett <liam.howlett@oracle.com>
Signed-off-by: Sidhartha <sidhartha.kumar@oracle.com>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam Howlett <liam.howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
Ben Greear reports following splat:
------------[ cut here ]------------
net/netfilter/nf_nat_core.c:1114 module nf_nat func:nf_nat_register_fn has 256 allocated at module unload
WARNING: CPU: 1 PID: 10421 at lib/alloc_tag.c:168 alloc_tag_module_unload+0x22b/0x3f0
Modules linked in: nf_nat(-) btrfs ufs qnx4 hfsplus hfs minix vfat msdos fat
...
Hardware name: Default string Default string/SKYBAY, BIOS 5.12 08/04/2020
RIP: 0010:alloc_tag_module_unload+0x22b/0x3f0
codetag_unload_module+0x19b/0x2a0
? codetag_load_module+0x80/0x80
nf_nat module exit calls kfree_rcu on those addresses, but the free
operation is likely still pending by the time alloc_tag checks for leaks.
Wait for outstanding kfree_rcu operations to complete before checking
resolves this warning.
Reproducer:
unshare -n iptables-nft -t nat -A PREROUTING -p tcp
grep nf_nat /proc/allocinfo # will list 4 allocations
rmmod nft_chain_nat
rmmod nf_nat # will WARN.
[akpm@linux-foundation.org: add comment]
Link: https://lkml.kernel.org/r/20241007205236.11847-1-fw@strlen.de
Fixes: a473573964e5 ("lib: code tagging module support")
Signed-off-by: Florian Westphal <fw@strlen.de>
Reported-by: Ben Greear <greearb@candelatech.com>
Closes: https://lore.kernel.org/netdev/bdaaef9d-4364-4171-b82b-bcfc12e207eb@candelatech.com/
Cc: Uladzislau Rezki <urezki@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The "err" variable may be returned without an initialized value.
Fixes: 8e3a67f2de87 ("crypto: lib/mpi - Add error checks to extension")
Signed-off-by: Qianqiang Liu <qianqiang.liu@163.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Syzbot reports a KASAN failure early during boot on arm64 when building
with GCC 12.2.0 and using the Software Tag-Based KASAN mode:
| BUG: KASAN: invalid-access in smp_build_mpidr_hash arch/arm64/kernel/setup.c:133 [inline]
| BUG: KASAN: invalid-access in setup_arch+0x984/0xd60 arch/arm64/kernel/setup.c:356
| Write of size 4 at addr 03ff800086867e00 by task swapper/0
| Pointer tag: [03], memory tag: [fe]
Initial triage indicates that the report is a false positive and a
thorough investigation of the crash by Mark Rutland revealed the root
cause to be a bug in GCC:
> When GCC is passed `-fsanitize=hwaddress` or
> `-fsanitize=kernel-hwaddress` it ignores
> `__attribute__((no_sanitize_address))`, and instruments functions
> we require are not instrumented.
>
> [...]
>
> All versions [of GCC] I tried were broken, from 11.3.0 to 14.2.0
> inclusive.
>
> I think we have to disable KASAN_SW_TAGS with GCC until this is
> fixed
Disable Software Tag-Based KASAN when building with GCC by making
CC_HAS_KASAN_SW_TAGS depend on !CC_IS_GCC.
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Reported-by: syzbot+908886656a02769af987@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/000000000000f362e80620e27859@google.com
Link: https://lore.kernel.org/r/ZvFGwKfoC4yVjN_X@J2N7QTR9R3
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218854
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20241014161100.18034-1-will@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
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Just a grammar fix in lib/Kconfig.debug, under the config option
RUST_BUILD_ASSERT_ALLOW.
Reported-by: Miguel Ojeda <ojeda@kernel.org>
Closes: https://github.com/Rust-for-Linux/linux/issues/1006
Fixes: ecaa6ddff2fd ("rust: add `build_error` crate")
Signed-off-by: Timo Grautstueck <timo.grautstueck@web.de>
Link: https://lore.kernel.org/r/20241006140244.5509-1-timo.grautstueck@web.de
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
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The "err" variable may be returned without an initialized value.
Fixes: 8e3a67f2de87 ("crypto: lib/mpi - Add error checks to extension")
Signed-off-by: Qianqiang Liu <qianqiang.liu@163.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab fixes from Vlastimil Babka:
"Fixes for issues introduced in this merge window: kobject memory leak,
unsupressed warning and possible lockup in new slub_kunit tests,
misleading code in kvfree_rcu_queue_batch()"
* tag 'slab-for-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
slub/kunit: skip test_kfree_rcu when the slub kunit test is built-in
mm, slab: suppress warnings in test_leak_destroy kunit test
rcu/kvfree: Refactor kvfree_rcu_queue_batch()
mm, slab: fix use of SLAB_SUPPORTS_SYSFS in kmem_cache_release()
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
"vfs:
- Ensure that iter_folioq_get_pages() advances to the next slot
otherwise it will end up using the same folio with an out-of-bound
offset.
iomap:
- Dont unshare delalloc extents which can't be reflinked, and thus
can't be shared.
- Constrain the file range passed to iomap_file_unshare() directly in
iomap instead of requiring the callers to do it.
netfs:
- Use folioq_count instead of folioq_nr_slot to prevent an
unitialized value warning in netfs_clear_buffer().
- Fix missing wakeup after issuing writes by scheduling the write
collector only if all the subrequest queues are empty and thus no
writes are pending.
- Fix two minor documentation bugs"
* tag 'vfs-6.12-rc2.fixes.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
iomap: constrain the file range passed to iomap_file_unshare
iomap: don't bother unsharing delalloc extents
netfs: Fix missing wakeup after issuing writes
Documentation: add missing folio_queue entry
folio_queue: fix documentation
netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer
iov_iter: fix advancing slot in iter_folioq_get_pages()
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Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Acked-by: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Song Liu <song@kernel.org>
Cc: Yonghong Song <yonghong.song@linux.dev>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Stanislav Fomichev <sdf@fomichev.me>
Cc: Hao Luo <haoluo@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
|
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Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Include <linux/random.h> header to allow the removal of legacy
inclusion of <linux/prandom.h> from <linux/random.h>.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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|
Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.
auto-generated by the following:
for i in `git grep -l -w asm/unaligned.h`; do
sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
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Guenter Roeck reports that the new slub kunit tests added by commit
4e1c44b3db79 ("kunit, slub: add test_kfree_rcu() and
test_leak_destroy()") cause a lockup on boot on several architectures
when the kunit tests are configured to be built-in and not modules.
The test_kfree_rcu test invokes kfree_rcu() and boot sequence inspection
showed the runner for built-in kunit tests kunit_run_all_tests() is
called before setting system_state to SYSTEM_RUNNING and calling
rcu_end_inkernel_boot(), so this seems like a likely cause. So while I
was unable to reproduce the problem myself, skipping the test when the
slub_kunit module is built-in should avoid the issue.
An alternative fix that was moving the call to kunit_run_all_tests() a
bit later in the boot was tried, but has broken tests with functions
marked as __init due to free_initmem() already being done.
Fixes: 4e1c44b3db79 ("kunit, slub: add test_kfree_rcu() and test_leak_destroy()")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Closes: https://lore.kernel.org/all/6fcb1252-7990-4f0d-8027-5e83f0fb9409@roeck-us.net/
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Uladzislau Rezki <urezki@gmail.com>
Cc: rcu@vger.kernel.org
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Cc: linux-kselftest@vger.kernel.org
Cc: kunit-dev@googlegroups.com
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
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The test_leak_destroy kunit test intends to test the detection of stray
objects in kmem_cache_destroy(), which normally produces a warning. The
other slab kunit tests suppress the warnings in the kunit test context,
so suppress warnings and related printk output in this test as well.
Automated test running environments then don't need to learn to filter
the warnings.
Also rename the test's kmem_cache, the name was wrongly copy-pasted from
test_kfree_rcu.
Fixes: 4e1c44b3db79 ("kunit, slub: add test_kfree_rcu() and test_leak_destroy()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202408251723.42f3d902-oliver.sang@intel.com
Reported-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Closes: https://lore.kernel.org/all/CAB=+i9RHHbfSkmUuLshXGY_ifEZg9vCZi3fqr99+kmmnpDus7Q@mail.gmail.com/
Reported-by: Guenter Roeck <linux@roeck-us.net>
Closes: https://lore.kernel.org/all/6fcb1252-7990-4f0d-8027-5e83f0fb9409@roeck-us.net/
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
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