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Using uninitialized_var() is dangerous as it papers over real bugs[1]
(or can in the future), and suppresses unrelated compiler warnings
(e.g. "unused variable"). If the compiler thinks it is uninitialized,
either simply initialize the variable or make compiler changes.
In preparation for removing[2] the[3] macro[4], remove all remaining
needless uses with the following script:
git grep '\buninitialized_var\b' | cut -d: -f1 | sort -u | \
xargs perl -pi -e \
's/\buninitialized_var\(([^\)]+)\)/\1/g;
s:\s*/\* (GCC be quiet|to make compiler happy) \*/$::g;'
drivers/video/fbdev/riva/riva_hw.c was manually tweaked to avoid
pathological white-space.
No outstanding warnings were found building allmodconfig with GCC 9.3.0
for x86_64, i386, arm64, arm, powerpc, powerpc64le, s390x, mips, sparc64,
alpha, and m68k.
[1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@google.com/
[2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/
[3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/
[4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/
Reviewed-by: Leon Romanovsky <leonro@mellanox.com> # drivers/infiniband and mlx4/mlx5
Acked-by: Jason Gunthorpe <jgg@mellanox.com> # IB
Acked-by: Kalle Valo <kvalo@codeaurora.org> # wireless drivers
Reviewed-by: Chao Yu <yuchao0@huawei.com> # erofs
Signed-off-by: Kees Cook <keescook@chromium.org>
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The pgprot argument to __vmalloc is always PAGE_KERNEL now, so remove it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com> [hyperv]
Acked-by: Gao Xiang <xiang@kernel.org> [erofs]
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Wei Liu <wei.liu@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Link: http://lkml.kernel.org/r/20200414131348.444715-22-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Introduce crypto_shash_tfm_digest() and use it wherever possible.
- Fix use-after-free and race in crypto_spawn_alg.
- Add support for parallel and batch requests to crypto_engine.
Algorithms:
- Update jitter RNG for SP800-90B compliance.
- Always use jitter RNG as seed in drbg.
Drivers:
- Add Arm CryptoCell driver cctrng.
- Add support for SEV-ES to the PSP driver in ccp"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (114 commits)
crypto: hisilicon - fix driver compatibility issue with different versions of devices
crypto: engine - do not requeue in case of fatal error
crypto: cavium/nitrox - Fix a typo in a comment
crypto: hisilicon/qm - change debugfs file name from qm_regs to regs
crypto: hisilicon/qm - add DebugFS for xQC and xQE dump
crypto: hisilicon/zip - add debugfs for Hisilicon ZIP
crypto: hisilicon/hpre - add debugfs for Hisilicon HPRE
crypto: hisilicon/sec2 - add debugfs for Hisilicon SEC
crypto: hisilicon/qm - add debugfs to the QM state machine
crypto: hisilicon/qm - add debugfs for QM
crypto: stm32/crc32 - protect from concurrent accesses
crypto: stm32/crc32 - don't sleep in runtime pm
crypto: stm32/crc32 - fix multi-instance
crypto: stm32/crc32 - fix run-time self test issue.
crypto: stm32/crc32 - fix ext4 chksum BUG_ON()
crypto: hisilicon/zip - Use temporary sqe when doing work
crypto: hisilicon - add device error report through abnormal irq
crypto: hisilicon - remove codes of directly report device errors through MSI
crypto: hisilicon - QM memory management optimization
crypto: hisilicon - unify initial value assignment into QM
...
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crypto_shash_descsize() returns the size of the shash_desc context
needed to compute the hash, not the size of the hash itself.
crypto_shash_digestsize() would be correct, or alternatively using
c->hash_len and c->hmac_desc_len which already store the correct values.
But actually it's simpler to just use stack arrays, so do that instead.
Fixes: 49525e5eecca ("ubifs: Add helper functions for authentication support")
Fixes: da8ef65f9573 ("ubifs: Authenticate replayed journal")
Cc: <stable@vger.kernel.org> # v4.20+
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Instead of manually allocating a 'struct shash_desc' on the stack and
calling crypto_shash_digest(), switch to using the new helper function
crypto_shash_tfm_digest() which does this for us.
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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When "ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs" introduced atime
support to ubifs, it also added lazytime support. As far as I can tell
the lazytime support is terminally broken, as it causes
mark_inode_dirty_sync to be called from __writeback_single_inode, which
will then trigger the locking assert in ubifs_dirty_inode. Just remove
the broken lazytime support for now, it can be added back later,
especially as some infrastructure changes should make that easier soon.
Fixes: 8c1c5f263833 ("ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI and UBIFS updates from Richard Weinberger:
- Fix for memory leaks around UBIFS orphan handling
- Fix for memory leaks around UBI fastmap
- Remove zero-length array from ubi-media.h
- Fix for TNC lookup in UBIFS orphan code
* tag 'for-linus-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubi: ubi-media.h: Replace zero-length array with flexible-array member
ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len
ubi: fastmap: Only produce the initial anchor PEB when fastmap is used
ubi: fastmap: Free unused fastmap anchor peb during detach
ubifs: ubifs_add_orphan: Fix a memory leak bug
ubifs: ubifs_jnl_write_inode: Fix a memory leak bug
ubifs: Fix ubifs_tnc_lookup() usage in do_kill_orphans()
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In “ubifs_check_node”, when the value of "node_len" is abnormal,
the code will goto label of "out_len" for execution. Then, in the
following "ubifs_dump_node", if inode type is "UBIFS_DATA_NODE",
in "print_hex_dump", an out-of-bounds access may occur due to the
wrong "ch->len".
Therefore, when the value of "node_len" is abnormal, data length
should to be adjusted to a reasonable safe range. At this time,
structured data is not credible, so dump the corrupted data directly
for analysis.
Signed-off-by: Liu Song <liu.song11@zte.com.cn>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Memory leak occurs when files with extended attributes are added to
orphan list.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Fixes: 988bec41318f3fa897e2f8 ("ubifs: orphan: Handle xattrs like files")
Signed-off-by: Richard Weinberger <richard@nod.at>
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When inodes with extended attributes are evicted, xent is not freed in one
exit branch.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Fixes: 9ca2d732644484488db3112 ("ubifs: Limit number of xattrs per inode")
Signed-off-by: Richard Weinberger <richard@nod.at>
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Orphans are allowed to point to deleted inodes.
So -ENOENT is not a fatal error.
Reported-by: Кочетков Максим <fido_max@inbox.ru>
Reported-and-tested-by: "Christian Berger" <Christian.Berger@de.bosch.com>
Tested-by: Karl Olsen <karl@micro-technic.com>
Tested-by: Jef Driesen <jef.driesen@niko.eu>
Fixes: ee1438ce5dc4 ("ubifs: Check link count of inodes when killing orphans.")
Signed-off-by: Richard Weinberger <richard@nod.at>
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This new ioctl retrieves a file's encryption nonce, which is useful for
testing. See the corresponding fs/crypto/ patch for more details.
Link: https://lore.kernel.org/r/20200314205052.93294-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs timestamp updates from Al Viro:
"More 64bit timestamp work"
* 'imm.timestamp' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
kernfs: don't bother with timestamp truncation
fs: Do not overload update_time
fs: Delete timespec64_trunc()
fs: ubifs: Eliminate timespec64_trunc() usage
fs: ceph: Delete timespec64_trunc() usage
fs: cifs: Delete usage of timespec64_trunc
fs: fat: Eliminate timespec64_trunc() usage
utimes: Clamp the timestamps in notify_change()
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI/UBIFS updates from Miquel Raynal:
"This pull request contains mostly fixes for UBI and UBIFS:
UBI:
- Fixes for memory leaks in error paths
- Fix for an logic error in a fastmap selfcheck
UBIFS:
- Fix for FS_IOC_SETFLAGS related to fscrypt flag
- Support for FS_ENCRYPT_FL
- Fix for a dead lock in bulk-read mode"
Sent on behalf of Richard Weinberger who is traveling.
* tag 'upstream-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubi: Fix an error pointer dereference in error handling code
ubifs: Fix memory leak from c->sup_node
ubifs: Fix ino_t format warnings in orphan_delete()
ubifs: Fix deadlock in concurrent bulk-read and writepage
ubifs: Fix wrong memory allocation
ubi: Free the normal volumes in error paths of ubi_attach_mtd_dev()
ubi: Check the presence of volume before call ubi_fastmap_destroy_checkmap()
ubifs: Add support for FS_ENCRYPT_FL
ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flag
ubi: wl: Remove set but not used variable 'prev_e'
ubi: fastmap: Fix inverted logic in seen selfcheck
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In order to support a new dirhash method that is a secret-keyed hash
over the plaintext filenames (which will be used by encrypted+casefolded
directories on ext4 and f2fs), fscrypt will be switching to a new no-key
name format that always encodes the dirhash in the name.
UBIFS isn't happy with this because it has assertions that verify that
either the hash or the disk name is provided, not both.
Change it to use the disk name if one is provided, even if a hash is
available too; else use the hash.
Link: https://lore.kernel.org/r/20200120223201.241390-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
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If userspace provides an invalid fscrypt no-key filename which encodes a
hash value with any of the UBIFS node type bits set (i.e. the high 3
bits), gracefully report ENOENT rather than triggering ubifs_assert().
Test case with kvm-xfstests shell:
. fs/ubifs/config
. ~/xfstests/common/encrypt
dev=$(__blkdev_to_ubi_volume /dev/vdc)
ubiupdatevol $dev -t
mount $dev /mnt -t ubifs
mkdir /mnt/edir
xfs_io -c set_encpolicy /mnt/edir
rm /mnt/edir/_,,,,,DAAAAAAAAAAAAAAAAAAAAAAAAAA
With the bug, the following assertion fails on the 'rm' command:
[ 19.066048] UBIFS error (ubi0:0 pid 379): ubifs_assert_failed: UBIFS assert failed: !(hash & ~UBIFS_S_KEY_HASH_MASK), in fs/ubifs/key.h:170
Fixes: f4f61d2cc6d8 ("ubifs: Implement encrypted filenames")
Cc: <stable@vger.kernel.org> # v4.10+
Link: https://lore.kernel.org/r/20200120223201.241390-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
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There's no need for the ubifs_crypt_is_encrypted() function anymore.
Just use IS_ENCRYPTED() instead, like ext4 and f2fs do. IS_ENCRYPTED()
checks the VFS-level flag instead of the UBIFS-specific flag, but it
shouldn't change any behavior since the flags are kept in sync.
Link: https://lore.kernel.org/r/20191209212721.244396-1-ebiggers@kernel.org
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Eric Biggers <ebiggers@google.com>
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The c->sup_node is allocated in function ubifs_read_sb_node but
is not freed. This will cause memory leak as below:
unreferenced object 0xbc9ce000 (size 4096):
comm "mount", pid 500, jiffies 4294952946 (age 315.820s)
hex dump (first 32 bytes):
31 18 10 06 06 7b f1 11 02 00 00 00 00 00 00 00 1....{..........
00 10 00 00 06 00 00 00 00 00 00 00 08 00 00 00 ................
backtrace:
[<d1c503cd>] ubifs_read_superblock+0x48/0xebc
[<a20e14bd>] ubifs_mount+0x974/0x1420
[<8589ecc3>] legacy_get_tree+0x2c/0x50
[<5f1fb889>] vfs_get_tree+0x28/0xfc
[<bbfc7939>] do_mount+0x4f8/0x748
[<4151f538>] ksys_mount+0x78/0xa0
[<d59910a9>] ret_fast_syscall+0x0/0x54
[<1cc40005>] 0x7ea02790
Free it in ubifs_umount and in the error path of mount_ubifs.
Fixes: fd6150051bec ("ubifs: Store read superblock node")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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On alpha and s390x:
fs/ubifs/debug.h:158:11: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘ino_t {aka unsigned int}’ [-Wformat=]
...
fs/ubifs/orphan.c:132:3: note: in expansion of macro ‘dbg_gen’
dbg_gen("deleted twice ino %lu", orph->inum);
...
fs/ubifs/orphan.c:140:3: note: in expansion of macro ‘dbg_gen’
dbg_gen("delete later ino %lu", orph->inum);
__kernel_ino_t is "unsigned long" on most architectures, but not on
alpha and s390x, where it is "unsigned int". Hence when printing an
ino_t, it should always be cast to "unsigned long" first.
Fix this by re-adding the recently removed casts.
Fixes: 8009ce956c3d2802 ("ubifs: Don't leak orphans on memory during commit")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
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In ubifs, concurrent execution of writepage and bulk read on the same file
may cause ABBA deadlock, for example (Reproduce method see Link):
Process A(Bulk-read starts from page4) Process B(write page4 back)
vfs_read wb_workfn or fsync
... ...
generic_file_buffered_read write_cache_pages
ubifs_readpage LOCK(page4)
ubifs_bulk_read ubifs_writepage
LOCK(ui->ui_mutex) ubifs_write_inode
ubifs_do_bulk_read LOCK(ui->ui_mutex)
find_or_create_page(alloc page4) ↑
LOCK(page4) <-- ABBA deadlock occurs!
In order to ensure the serialization execution of bulk read, we can't
remove the big lock 'ui->ui_mutex' in ubifs_bulk_read(). Instead, we
allow ubifs_do_bulk_read() to lock page failed by replacing
find_or_create_page(FGP_LOCK) with
pagecache_get_page(FGP_LOCK | FGP_NOWAIT).
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Suggested-by: zhangyi (F) <yi.zhang@huawei.com>
Cc: <Stable@vger.kernel.org>
Fixes: 4793e7c5e1c ("UBIFS: add bulk-read facility")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206153
Signed-off-by: Richard Weinberger <richard@nod.at>
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In create_default_filesystem() when we allocate the idx node we must use
the idx_node_size we calculated just one line before, not tmp, which
contains completely other data.
Fixes: c4de6d7e4319 ("ubifs: Refactor create_default_filesystem()")
Cc: stable@vger.kernel.org # v4.20+
Reported-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Tested-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Make the FS_IOC_GETFLAGS ioctl on ubifs return the FS_ENCRYPT_FL flag on
encrypted files, like ext4 and f2fs do.
Also make this flag be ignored by FS_IOC_SETFLAGS, like ext4 and f2fs
do, since it's a recognized flag but is not directly settable.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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UBIFS's implementation of FS_IOC_SETFLAGS fails to preserve existing
inode flags that aren't settable by FS_IOC_SETFLAGS, namely the encrypt
flag. This causes the encrypt flag to be unexpectedly cleared.
Fix it by preserving existing unsettable flags, like ext4 and f2fs do.
Test case with kvm-xfstests shell:
FSTYP=ubifs KEYCTL_PROG=keyctl
. fs/ubifs/config
. ~/xfstests/common/encrypt
dev=$(__blkdev_to_ubi_volume /dev/vdc)
ubiupdatevol -t $dev
mount $dev /mnt -t ubifs
k=$(_generate_session_encryption_key)
mkdir /mnt/edir
xfs_io -c "set_encpolicy $k" /mnt/edir
echo contents > /mnt/edir/file
chattr +i /mnt/edir/file
chattr -i /mnt/edir/file
With the bug, the following errors occur on the last command:
[ 18.081559] fscrypt (ubifs, inode 67): Inconsistent encryption context (parent directory: 65)
chattr: Operation not permitted while reading flags on /mnt/edir/file
Fixes: d475a507457b ("ubifs: Add skeleton for fscrypto")
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The commit 643fa9612bf1 ("fscrypt: remove filesystem specific
build config option") removed modular support for fs/crypto. This
causes the Crypto API to be built-in whenever fscrypt is enabled.
This makes it very difficult for me to test modular builds of
the Crypto API without disabling fscrypt which is a pain.
As fscrypt is still evolving and it's developing new ties with the
fs layer, it's hard to build it as a module for now.
However, the actual algorithms are not required until a filesystem
is mounted. Therefore we can allow them to be built as modules.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/20191227024700.7vrzuux32uyfdgum@gondor.apana.org.au
Signed-off-by: Eric Biggers <ebiggers@google.com>
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fscrypt_get_encryption_info() returns 0 if the encryption key is
unavailable; it never returns ENOKEY. So remove checks for ENOKEY.
Link: https://lore.kernel.org/r/20191209212348.243331-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
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DEFAULT_TIME_GRAN is seconds granularity. We can
just drop the nsec while creating the default root node.
Delete the unneeded call to timespec64_trunc().
Also update the ktime_get_* api to match the one used in
current_time(). This allows for the timestamps to be updated
by using the same ktime_get_* api always.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: richard@nod.at
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Push clamping timestamps into notify_change(), so in-kernel
callers like nfsd and overlayfs will get similar timestamp
set behavior as utimes.
AV: get rid of clamping in ->setattr() instances; we don't need
to bother with that there, with notify_change() doing normalization
in all cases now (it already did for implicit case, since current_time()
clamps).
Suggested-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 42e729b9ddbb ("utimes: Clamp the timestamps before update")
Cc: stable@vger.kernel.org # v5.4
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Running stress-test test_2 in mtd-utils on ubi device, sometimes we can
get following oops message:
BUG: unable to handle page fault for address: ffffffff00000140
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 280a067 P4D 280a067 PUD 0
Oops: 0000 [#1] SMP
CPU: 0 PID: 60 Comm: kworker/u16:1 Kdump: loaded Not tainted 5.2.0 #13
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0
-0-ga698c8995f-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-ubifs_0_0)
RIP: 0010:rb_next_postorder+0x2e/0xb0
Code: 80 db 03 01 48 85 ff 0f 84 97 00 00 00 48 8b 17 48 83 05 bc 80 db
03 01 48 83 e2 fc 0f 84 82 00 00 00 48 83 05 b2 80 db 03 01 <48> 3b 7a
10 48 89 d0 74 02 f3 c3 48 8b 52 08 48 83 05 a3 80 db 03
RSP: 0018:ffffc90000887758 EFLAGS: 00010202
RAX: ffff888129ae4700 RBX: ffff888138b08400 RCX: 0000000080800001
RDX: ffffffff00000130 RSI: 0000000080800024 RDI: ffff888138b08400
RBP: ffff888138b08400 R08: ffffea0004a6b920 R09: 0000000000000000
R10: ffffc90000887740 R11: 0000000000000001 R12: ffff888128d48000
R13: 0000000000000800 R14: 000000000000011e R15: 00000000000007c8
FS: 0000000000000000(0000) GS:ffff88813ba00000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff00000140 CR3: 000000013789d000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
destroy_old_idx+0x5d/0xa0 [ubifs]
ubifs_tnc_start_commit+0x4fe/0x1380 [ubifs]
do_commit+0x3eb/0x830 [ubifs]
ubifs_run_commit+0xdc/0x1c0 [ubifs]
Above Oops are due to the slab-out-of-bounds happened in do-while of
function layout_in_gaps indirectly called by ubifs_tnc_start_commit. In
function layout_in_gaps, there is a do-while loop placing index nodes
into the gaps created by obsolete index nodes in non-empty index LEBs
until rest index nodes can totally be placed into pre-allocated empty
LEBs. @c->gap_lebs points to a memory area(integer array) which records
LEB numbers used by 'in-the-gaps' method. Whenever a fitable index LEB
is found, corresponding lnum will be incrementally written into the
memory area pointed by @c->gap_lebs. The size
((@c->lst.idx_lebs + 1) * sizeof(int)) of memory area is allocated before
do-while loop and can not be changed in the loop. But @c->lst.idx_lebs
could be increased by function ubifs_change_lp (called by
layout_leb_in_gaps->ubifs_find_dirty_idx_leb->get_idx_gc_leb) during the
loop. So, sometimes oob happens when number of cycles in do-while loop
exceeds the original value of @c->lst.idx_lebs. See detail in
https://bugzilla.kernel.org/show_bug.cgi?id=204229.
This patch fixes oob in layout_in_gaps.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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If there are more than one valid snod on the sleb->nodes list,
do_kill_orphans will malloc ino more than once without releasing
previous ino's memory. Finally, it will trigger memory leak.
Fixes: ee1438ce5dc4 ("ubifs: Check link count of inodes when...")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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This reverts commit 9163e0184bd7d5f779934d34581843f699ad2ffd.
At the point when ubifs_fill_super() runs, we have already a reference
to the super block. So upon deactivate_locked_super() c will get
free()'ed via ->kill_sb().
Cc: Wenwen Wang <wenwen@cs.uga.edu>
Fixes: 9163e0184bd7 ("ubifs: Fix memory leak bug in alloc_ubifs_info() error path")
Reported-by: https://twitter.com/grsecurity/status/1180609139359277056
Signed-off-by: Richard Weinberger <richard@nod.at>
Tested-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The sup->hash_algo is a __le16, and whilst 0xffff is
the same in __le16 and u16, it would be better to use
cpu_to_le16() anyway (which should deal with constants)
and silence the following sparse warning:
fs/ubifs/sb.c:187:32: warning: incorrect type in assignment (different base types)
fs/ubifs/sb.c:187:32: expected restricted __le16 [usertype] hash_algo
fs/ubifs/sb.c:187:32: got int
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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In the ubifs_jnl_write_inode() functon, it calls ubifs_iget()
with xent->inum. The xent->inum is __le64, but the ubifs_iget()
takes native cpu endian.
I think that this should be changed to passing le64_to_cpu(xent->inum)
to fix the following sparse warning:
fs/ubifs/journal.c:902:58: warning: incorrect type in argument 2 (different base types)
fs/ubifs/journal.c:902:58: expected unsigned long inum
fs/ubifs/journal.c:902:58: got restricted __le64 [usertype] inum
Fixes: 7959cf3a7506 ("ubifs: journal: Handle xattrs like files")
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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In set_dent_cookie() the result of prandom_u32() is
assinged to an __le32 type. Make this a forced conversion
to remove the following sparse warning:
fs/ubifs/journal.c:506:30: warning: incorrect type in assignment (different base types)
fs/ubifs/journal.c:506:30: expected restricted __le32 [usertype] cookie
fs/ubifs/journal.c:506:30: got unsigned int
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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AFAICT this kind of problems are no longer possible since
debugfs gained file removal protection via
e9117a5a4bf6 ("debugfs: implement per-file removal protection").
Cc: Christoph Hellwig <hch@lst.de>
Cc: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI, UBIFS and JFFS2 updates from Richard Weinberger:
"UBI:
- Be less stupid when placing a fastmap anchor
- Try harder to get an empty PEB in case of contention
- Make ubiblock to warn if image is not a multiple of 512
UBIFS:
- Various fixes in error paths
JFFS2:
- Various fixes in error paths"
* tag 'upstream-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
jffs2: Fix memory leak in jffs2_scan_eraseblock() error path
jffs2: Remove jffs2_gc_fetch_page and jffs2_gc_release_page
jffs2: Fix possible null-pointer dereferences in jffs2_add_frag_to_fragtree()
ubi: block: Warn if volume size is not multiple of 512
ubifs: Fix memory leak bug in alloc_ubifs_info() error path
ubifs: Fix memory leak in __ubifs_node_verify_hmac error path
ubifs: Fix memory leak in read_znode() error path
ubi: ubi_wl_get_peb: Increase the number of attempts while getting PEB
ubi: Don't do anchor move within fastmap area
ubifs: Remove redundant assignment to pointer fname
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git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground
Pull y2038 vfs updates from Arnd Bergmann:
"Add inode timestamp clamping.
This series from Deepa Dinamani adds a per-superblock minimum/maximum
timestamp limit for a file system, and clamps timestamps as they are
written, to avoid random behavior from integer overflow as well as
having different time stamps on disk vs in memory.
At mount time, a warning is now printed for any file system that can
represent current timestamps but not future timestamps more than 30
years into the future, similar to the arbitrary 30 year limit that was
added to settimeofday().
This was picked as a compromise to warn users to migrate to other file
systems (e.g. ext4 instead of ext3) when they need the file system to
survive beyond 2038 (or similar limits in other file systems), but not
get in the way of normal usage"
* tag 'y2038-vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground:
ext4: Reduce ext4 timestamp warnings
isofs: Initialize filesystem timestamp ranges
pstore: fs superblock limits
fs: omfs: Initialize filesystem timestamp ranges
fs: hpfs: Initialize filesystem timestamp ranges
fs: ceph: Initialize filesystem timestamp ranges
fs: sysv: Initialize filesystem timestamp ranges
fs: affs: Initialize filesystem timestamp ranges
fs: fat: Initialize filesystem timestamp ranges
fs: cifs: Initialize filesystem timestamp ranges
fs: nfs: Initialize filesystem timestamp ranges
ext4: Initialize timestamps limits
9p: Fill min and max timestamps in sb
fs: Fill in max and min timestamps in superblock
utimes: Clamp the timestamps before update
mount: Add mount warning for impending timestamp expiry
timestamp_truncate: Replace users of timespec64_trunc
vfs: Add timestamp_truncate() api
vfs: Add file timestamp range support
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Pull fscrypt updates from Eric Biggers:
"This is a large update to fs/crypto/ which includes:
- Add ioctls that add/remove encryption keys to/from a
filesystem-level keyring.
These fix user-reported issues where e.g. an encrypted home
directory can break NetworkManager, sshd, Docker, etc. because they
don't get access to the needed keyring. These ioctls also provide a
way to lock encrypted directories that doesn't use the
vm.drop_caches sysctl, so is faster, more reliable, and doesn't
always need root.
- Add a new encryption policy version ("v2") which switches to a more
standard, secure, and flexible key derivation function, and starts
verifying that the correct key was supplied before using it.
The key derivation improvement is needed for its own sake as well
as for ongoing feature work for which the current way is too
inflexible.
Work is in progress to update both Android and the 'fscrypt' userspace
tool to use both these features. (Working patches are available and
just need to be reviewed+merged.) Chrome OS will likely use them too.
This has also been tested on ext4, f2fs, and ubifs with xfstests --
both the existing encryption tests, and the new tests for this. This
has also been in linux-next since Aug 16 with no reported issues. I'm
also using an fscrypt v2-encrypted home directory on my personal
desktop"
* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt: (27 commits)
ext4 crypto: fix to check feature status before get policy
fscrypt: document the new ioctls and policy version
ubifs: wire up new fscrypt ioctls
f2fs: wire up new fscrypt ioctls
ext4: wire up new fscrypt ioctls
fscrypt: require that key be added when setting a v2 encryption policy
fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl
fscrypt: allow unprivileged users to add/remove keys for v2 policies
fscrypt: v2 encryption policy support
fscrypt: add an HKDF-SHA512 implementation
fscrypt: add FS_IOC_GET_ENCRYPTION_KEY_STATUS ioctl
fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY ioctl
fscrypt: add FS_IOC_ADD_ENCRYPTION_KEY ioctl
fscrypt: rename keyinfo.c to keysetup.c
fscrypt: move v1 policy key setup to keysetup_v1.c
fscrypt: refactor key setup code in preparation for v2 policies
fscrypt: rename fscrypt_master_key to fscrypt_direct_key
fscrypt: add ->ci_inode to fscrypt_info
fscrypt: use FSCRYPT_* definitions, not FS_*
fscrypt: use FSCRYPT_ prefix for uapi constants
...
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In ubifs_mount(), 'c' is allocated through kzalloc() in alloc_ubifs_info().
However, it is not deallocated in the following execution if
ubifs_fill_super() fails, leading to a memory leak bug. To fix this issue,
free 'c' before going to the 'out_deact' label.
Fixes: 1e51764a3c2a ("UBIFS: add new flash file system")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Richard Weinberger <richard@nod.at>
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In __ubifs_node_verify_hmac(), 'hmac' is allocated through kmalloc().
However, it is not deallocated in the following execution if
ubifs_node_calc_hmac() fails, leading to a memory leak bug. To fix this
issue, free 'hmac' before returning the error.
Fixes: 49525e5eecca ("ubifs: Add helper functions for authentication support")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Richard Weinberger <richard@nod.at>
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In read_znode(), the indexing node 'idx' is allocated by kmalloc().
However, it is not deallocated in the following execution if
ubifs_node_check_hash() fails, leading to a memory leak bug. To fix this
issue, free 'idx' before returning the error.
Fixes: 16a26b20d2af ("ubifs: authentication: Add hashes to index nodes")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The pointer fname is being assigned with a value that is never
read because the function returns after the assignment. The assignment
is redundant and can be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Update the inode timestamp updates to use timestamp_truncate()
instead of timespec64_trunc().
The change was mostly generated by the following coccinelle
script.
virtual context
virtual patch
@r1 depends on patch forall@
struct inode *inode;
identifier i_xtime =~ "^i_[acm]time$";
expression e;
@@
inode->i_xtime =
- timespec64_trunc(
+ timestamp_truncate(
...,
- e);
+ inode);
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Jeff Layton <jlayton@kernel.org>
Cc: adrian.hunter@intel.com
Cc: dedekind1@gmail.com
Cc: gregkh@linuxfoundation.org
Cc: hch@lst.de
Cc: jaegeuk@kernel.org
Cc: jlbec@evilplan.org
Cc: richard@nod.at
Cc: tj@kernel.org
Cc: yuchao0@huawei.com
Cc: linux-f2fs-devel@lists.sourceforge.net
Cc: linux-ntfs-dev@lists.sourceforge.net
Cc: linux-mtd@lists.infradead.org
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If the number of dirty pages to be written back is large,
then writeback_inodes_sb will block waiting for a long time,
causing hung task detection alarm. Therefore, we should limit
the maximum number of pages written back this time, which let
the budget be completed faster. The remaining dirty pages
tend to rely on the writeback mechanism to complete the
synchronization.
Fixes: b6e51316daed ("writeback: separate starting of sync vs opportunistic writeback")
Signed-off-by: Liu Song <liu.song11@zte.com.cn>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Currently on a freshly mounted UBIFS, c->min_log_bytes is 0.
This can lead to a log overrun and make commits fail.
Recent kernels will report the following assert:
UBIFS assert failed: c->lhead_lnum != c->ltail_lnum, in fs/ubifs/log.c:412
c->min_log_bytes can have two states, 0 and c->leb_size.
It controls how much bytes of the log area are reserved for non-bud
nodes such as commit nodes.
After a commit it has to be set to c->leb_size such that we have always
enough space for a commit. While a commit runs it can be 0 to make the
remaining bytes of the log available to writers.
Having it set to 0 right after mount is wrong since no space for commits
is reserved.
Fixes: 1e51764a3c2ac ("UBIFS: add new flash file system")
Reported-and-tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
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We unlock after orphan_delete(), so no need to unlock
in the function too.
Reported-by: Han Xu <han.xu@nxp.com>
Fixes: 8009ce956c3d ("ubifs: Don't leak orphans on memory during commit")
Signed-off-by: Richard Weinberger <richard@nod.at>
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Wire up the new ioctls for adding and removing fscrypt keys to/from the
filesystem, and the new ioctl for retrieving v2 encryption policies.
The key removal ioctls also required making UBIFS use
fscrypt_drop_inode().
For more details see Documentation/filesystems/fscrypt.rst and the
fscrypt patches that added the implementation of these ioctls.
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Biggers <ebiggers@google.com>
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migrate_page_move_mapping() doesn't use the mode argument. Remove it
and update callers accordingly.
Link: http://lkml.kernel.org/r/20190508210301.8472-1-keith.busch@intel.com
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBIFS updates from Richard Weinberger:
- Support for zstd compression
- Support for offline signed filesystems
- Various fixes for regressions
* tag 'upstream-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubifs: Don't leak orphans on memory during commit
ubifs: Check link count of inodes when killing orphans.
ubifs: Add support for zstd compression.
ubifs: support offline signed images
ubifs: remove unnecessary check in ubifs_log_start_commit
ubifs: Fix typo of output in get_cs_sqnum
ubifs: Simplify redundant code
ubifs: Correctly use tnc_next() in search_dh_cookie()
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git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull common SETFLAGS/FSSETXATTR parameter checking from Darrick Wong:
"Here's a patch series that sets up common parameter checking functions
for the FS_IOC_SETFLAGS and FS_IOC_FSSETXATTR ioctl implementations.
The goal here is to reduce the amount of behaviorial variance between
the filesystems where those ioctls originated (ext2 and XFS,
respectively) and everybody else.
- Standardize parameter checking for the SETFLAGS and FSSETXATTR
ioctls (which were the file attribute setters for ext4 and xfs and
have now been hoisted to the vfs)
- Only allow the DAX flag to be set on files and directories"
* tag 'vfs-fix-ioctl-checking-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
vfs: only allow FSSETXATTR to set DAX flag on files and dirs
vfs: teach vfs_ioc_fssetxattr_check to check extent size hints
vfs: teach vfs_ioc_fssetxattr_check to check project id info
vfs: create a generic checking function for FS_IOC_FSSETXATTR
vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and debugfs updates from Greg KH:
"Here is the "big" driver core and debugfs changes for 5.3-rc1
It's a lot of different patches, all across the tree due to some api
changes and lots of debugfs cleanups.
Other than the debugfs cleanups, in this set of changes we have:
- bus iteration function cleanups
- scripts/get_abi.pl tool to display and parse Documentation/ABI
entries in a simple way
- cleanups to Documenatation/ABI/ entries to make them parse easier
due to typos and other minor things
- default_attrs use for some ktype users
- driver model documentation file conversions to .rst
- compressed firmware file loading
- deferred probe fixes
All of these have been in linux-next for a while, with a bunch of
merge issues that Stephen has been patient with me for"
* tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (102 commits)
debugfs: make error message a bit more verbose
orangefs: fix build warning from debugfs cleanup patch
ubifs: fix build warning after debugfs cleanup patch
driver: core: Allow subsystems to continue deferring probe
drivers: base: cacheinfo: Ensure cpu hotplug work is done before Intel RDT
arch_topology: Remove error messages on out-of-memory conditions
lib: notifier-error-inject: no need to check return value of debugfs_create functions
swiotlb: no need to check return value of debugfs_create functions
ceph: no need to check return value of debugfs_create functions
sunrpc: no need to check return value of debugfs_create functions
ubifs: no need to check return value of debugfs_create functions
orangefs: no need to check return value of debugfs_create functions
nfsd: no need to check return value of debugfs_create functions
lib: 842: no need to check return value of debugfs_create functions
debugfs: provide pr_fmt() macro
debugfs: log errors when something goes wrong
drivers: s390/cio: Fix compilation warning about const qualifiers
drivers: Add generic helper to match by of_node
driver_find_device: Unify the match function with class_find_device()
bus_find_device: Unify the match callback with class_find_device
...
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