The race condition could cause the persisted superblock checksum
to not match the contents of the superblock, causing the
superblock to be considered corrupt.
An example of the race follows. A first thread is interrupted in the
middle of a checksum calculation. Then, another thread changes the
superblock, calculates a new checksum, and sets it. Then, the first
thread resumes and sets the checksum based on the older superblock.
To fix, serialize the superblock checksum calculation using the buffer
header lock. While a spinlock is sufficient, the buffer header is
already there and there is precedent for locking it (e.g. in
ext4_commit_super).
Tested the patch by booting up a kernel with the patch, creating
a filesystem and some files (including some orphans), and then
unmounting and remounting the file system.
Cc: stable@kernel.org
Signed-off-by: Constantine Sapuntzakis <costa@purestorage.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Suggested-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200914161014.22275-1-costa@purestorage.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
When ext4_journal_get_write_access() fails, we should
terminate the execution flow and release n_group_desc,
iloc.bh, dind and gdb_bh.
Cc: stable@kernel.org
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/20200829025403.3139-1-dinghao.liu@zju.edu.cn
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The 'handle' argument is not used for anything so simply remove it.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200826133116.11592-1-nborisov@suse.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Fields s_free_blocks_count_hi, s_r_blocks_count_hi and s_blocks_count_hi
are not valid if EXT4_FEATURE_INCOMPAT_64BIT is not enabled and should be
treated as zeroes.
Signed-off-by: Petr Malat <oss@malat.biz>
Link: https://lore.kernel.org/r/20200825150016.3363-1-oss@malat.biz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Delete repeated words in fs/ext4/.
{the, this, of, we, after}
Also change spelling of "xttr" in inline.c to "xattr" in 2 places.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200805024850.12129-1-rdunlap@infradead.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
ext4_mb_discard_group_preallocations() can be releasing group lock with
preallocations accumulated on its local list. Thus although
discard_pa_seq was incremented and concurrent allocating processes will
be retrying allocations, it can happen that premature ENOSPC error is
returned because blocks used for preallocations are not available for
reuse yet. Make sure we always free locally accumulated preallocations
before releasing group lock.
Fixes: 07b5b8e1ac ("ext4: mballoc: introduce pcpu seqcnt for freeing PA to improve ENOSPC handling")
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200924150959.4335-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
As we test disk offline/online with running fsstress, we find fsstress
process is keeping running state.
kworker/u32:3-262 [004] ...1 140.787471: ext4_mb_discard_preallocations: dev 8,32 needed 114
....
kworker/u32:3-262 [004] ...1 140.787471: ext4_mb_discard_preallocations: dev 8,32 needed 114
ext4_mb_new_blocks
repeat:
ext4_mb_discard_preallocations_should_retry(sb, ac, &seq)
freed = ext4_mb_discard_preallocations
ext4_mb_discard_group_preallocations
this_cpu_inc(discard_pa_seq);
---> freed == 0
seq_retry = ext4_get_discard_pa_seq_sum
for_each_possible_cpu(__cpu)
__seq += per_cpu(discard_pa_seq, __cpu);
if (seq_retry != *seq) {
*seq = seq_retry;
ret = true;
}
As we see seq_retry is sum of discard_pa_seq every cpu, if
ext4_mb_discard_group_preallocations return zero discard_pa_seq in this
cpu maybe increase one, so condition "seq_retry != *seq" have always
been met.
Ritesh Harjani suggest to in ext4_mb_discard_group_preallocations function we
only increase discard_pa_seq when there is some PA to free.
Fixes: 07b5b8e1ac ("ext4: mballoc: introduce pcpu seqcnt for freeing PA to improve ENOSPC handling")
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200916113859.1556397-3-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
After moving ext4's bmap to iomap interface, swapon functionality
on files created using fallocate (which creates unwritten extents) are
failing. This is since iomap_bmap interface returns 0 for unwritten
extents and thus generic_swapfile_activate considers this as holes
and hence bail out with below kernel msg :-
[340.915835] swapon: swapfile has holes
To fix this we need to implement ->swap_activate aops in ext4
which will use ext4_iomap_report_ops. Since we only need to return
the list of extents so ext4_iomap_report_ops should be enough.
Cc: stable@kernel.org
Reported-by: Yuxuan Shui <yshuiv7@gmail.com>
Fixes: ac58e4fb03 ("ext4: move ext4 bmap to use iomap infrastructure")
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200904091653.1014334-1-riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
-----BEGIN PGP SIGNATURE-----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=mBw7
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.9-2020-09-25' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Two fixes for regressions in this cycle, and one that goes to 5.8
stable:
- fix leak of getname() retrieved filename
- remove plug->nowait assignment, fixing a regression with btrfs
- fix for async buffered retry"
* tag 'io_uring-5.9-2020-09-25' of git://git.kernel.dk/linux-block:
io_uring: ensure async buffered read-retry is setup properly
io_uring: don't unconditionally set plug->nowait = true
io_uring: ensure open/openat2 name is cleaned on cancelation
A previous commit for fixing up short reads botched the async retry
path, so we ended up going to worker threads more often than we should.
Fix this up, so retries work the way they originally were intended to.
Fixes: 227c0c9673 ("io_uring: internally retry short reads")
Reported-by: Hao_Xu <haoxu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This causes all the bios to be submitted with REQ_NOWAIT, which can be
problematic on either btrfs or on file systems that otherwise use a mix
of block devices where only some of them support it.
For now, just remove the setting of plug->nowait = true.
Reported-by: Dan Melnic <dmm@fb.com>
Reported-by: Brian Foster <bfoster@redhat.com>
Fixes: b63534c41e ("io_uring: re-issue block requests that failed because of resources")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If we cancel these requests, we'll leak the memory associated with the
filename. Add them to the table of ops that need cleaning, if
REQ_F_NEED_CLEANUP is set.
Cc: stable@vger.kernel.org
Fixes: e62753e4e2 ("io_uring: call statx directly")
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----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=tFUE
-----END PGP SIGNATURE-----
Merge tag 'for-5.9-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"syzkaller started to hit us with reports, here's a fix for one type
(stack overflow when printing checksums on read error).
The other patch is a fix for sysfs object, we have a test for that and
it leads to a crash."
* tag 'for-5.9-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix put of uninitialized kobject after seed device delete
btrfs: fix overflow when copying corrupt csums for a message
Pull vfs fixes from Al Viro:
"No common topic, just assorted fixes"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fuse: fix the ->direct_IO() treatment of iov_iter
fs: fix cast in fsparam_u32hex() macro
vboxsf: Fix the check for the old binary mount-arguments struct
-----BEGIN PGP SIGNATURE-----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=ImBG
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.9-2020-09-22' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"A few fixes - most of them regression fixes from this cycle, but also
a few stable heading fixes, and a build fix for the included demo tool
since some systems now actually have gettid() available"
* tag 'io_uring-5.9-2020-09-22' of git://git.kernel.dk/linux-block:
io_uring: fix openat/openat2 unified prep handling
io_uring: mark statx/files_update/epoll_ctl as non-SQPOLL
tools/io_uring: fix compile breakage
io_uring: don't use retry based buffered reads for non-async bdev
io_uring: don't re-setup vecs/iter in io_resumit_prep() is already there
io_uring: don't run task work on an exiting task
io_uring: drop 'ctx' ref on task work cancelation
io_uring: grab any needed state during defer prep
The following test case leads to NULL kobject free error:
mount seed /mnt
add sprout to /mnt
umount /mnt
mount sprout to /mnt
delete seed
kobject: '(null)' (00000000dd2b87e4): is not initialized, yet kobject_put() is being called.
WARNING: CPU: 1 PID: 15784 at lib/kobject.c:736 kobject_put+0x80/0x350
RIP: 0010:kobject_put+0x80/0x350
::
Call Trace:
btrfs_sysfs_remove_devices_dir+0x6e/0x160 [btrfs]
btrfs_rm_device.cold+0xa8/0x298 [btrfs]
btrfs_ioctl+0x206c/0x22a0 [btrfs]
ksys_ioctl+0xe2/0x140
__x64_sys_ioctl+0x1e/0x29
do_syscall_64+0x96/0x150
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4047c6288b
::
This is because, at the end of the seed device-delete, we try to remove
the seed's devid sysfs entry. But for the seed devices under the sprout
fs, we don't initialize the devid kobject yet. So add a kobject state
check, which takes care of the bug.
Fixes: 668e48af7a ("btrfs: sysfs, add devid/dev_state kobject and device attributes")
CC: stable@vger.kernel.org # 5.6+
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
A previous commit unified how we handle prep for these two functions,
but this means that we check the allowed context (SQPOLL, specifically)
later than we should. Move the ring type checking into the two parent
functions, instead of doing it after we've done some setup work.
Fixes: ec65fea5a8 ("io_uring: deduplicate io_openat{,2}_prep()")
Reported-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
These will naturally fail when attempted through SQPOLL, but either
with -EFAULT or -EBADF. Make it explicit that these are not workable
through SQPOLL and return -EINVAL, just like other ops that need to
use ->files.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Some block devices, like dm, bubble back -EAGAIN through the completion
handler. We check for this in io_read(), but don't honor it for when
we have copied the iov. Return -EAGAIN for this case before retrying,
to force punt to io-wq.
Fixes: bcf5a06304 ("io_uring: support true async buffered reads, if file provides it")
Reported-by: Zorro Lang <zlang@redhat.com>
Tested-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If we already have mapped the necessary data for retry, then don't set
it up again. It's a pointless operation, and we leak the iovec if it's
a large (non-stack) vec.
Fixes: b63534c41e ("io_uring: re-issue block requests that failed because of resources")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Commit 32927393dc ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer. Adjust the
definition of dirtytime_interval_handler to match its prototype in
linux/writeback.h which fixes the following sparse error/warning:
fs/fs-writeback.c:2189:50: warning: incorrect type in argument 3 (different address spaces)
fs/fs-writeback.c:2189:50: expected void *
fs/fs-writeback.c:2189:50: got void [noderef] __user *buffer
fs/fs-writeback.c:2184:5: error: symbol 'dirtytime_interval_handler' redeclared with different type (incompatible argument 3 (different address spaces)):
fs/fs-writeback.c:2184:5: int extern [addressable] [signed] [toplevel] dirtytime_interval_handler( ... )
fs/fs-writeback.c: note: in included file:
./include/linux/writeback.h:374:5: note: previously declared as:
./include/linux/writeback.h:374:5: int extern [addressable] [signed] [toplevel] dirtytime_interval_handler( ... )
Fixes: 32927393dc ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20200907093140.13434-1-tklauser@distanz.ch
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
the callers rely upon having any iov_iter_truncate() done inside
->direct_IO() countered by iov_iter_reexpand().
Reported-by: Qian Cai <cai@redhat.com>
Tested-by: Qian Cai <cai@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-----BEGIN PGP SIGNATURE-----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=pdp0
-----END PGP SIGNATURE-----
Merge tag 'for-5.9-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fix from David Sterba:
"One of the recent lockdep fixes introduced a bug that breaks the
search ioctl, which is used by some applications (bees, compsize). The
patch made it to stable trees so we need this fixup to make it work
again"
* tag 'for-5.9-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix wrong address when faulting in pages in the search ioctl
This isn't safe, and isn't needed either. We are guaranteed that any
work we queue is on a live task (and will be run), or it goes to
our backup io-wq threads if the task is exiting.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If task_work ends up being marked for cancelation, we go through a
cancelation helper instead of the queue path. In converting task_work to
always hold a ctx reference, this path was missed. Make sure that
io_req_task_cancel() puts the reference that is being held against the
ctx.
Fixes: 6d816e088c ("io_uring: hold 'ctx' reference around task_work queue + execute")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
When faulting in the pages for the user supplied buffer for the search
ioctl, we are passing only the base address of the buffer to the function
fault_in_pages_writeable(). This means that after the first iteration of
the while loop that searches for leaves, when we have a non-zero offset,
stored in 'sk_offset', we try to fault in a wrong page range.
So fix this by adding the offset in 'sk_offset' to the base address of the
user supplied buffer when calling fault_in_pages_writeable().
Several users have reported that the applications compsize and bees have
started to operate incorrectly since commit a48b73eca4 ("btrfs: fix
potential deadlock in the search ioctl") was added to stable trees, and
these applications make heavy use of the search ioctls. This fixes their
issues.
Link: https://lore.kernel.org/linux-btrfs/632b888d-a3c3-b085-cdf5-f9bb61017d92@lechevalier.se/
Link: https://github.com/kilobyte/compsize/issues/34
Fixes: a48b73eca4 ("btrfs: fix potential deadlock in the search ioctl")
CC: stable@vger.kernel.org # 4.4+
Tested-by: A L <mail@lechevalier.se>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Always grab work environment for deferred links. The assumption that we
will be running it always from the task in question is false, as exiting
tasks may mean that we're deferring this one to a thread helper. And at
that point it's too late to grab the work environment.
Fixes: debb85f496 ("io_uring: factor out grab_env() from defer_prep()")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Here are some small driver core and debugfs fixes for 5.9-rc5
Included in here are:
- firmware loader memory leak fix
- firmware loader testing fixes for non-EFI systems
- device link locking fixes found by lockdep
- kobject_del() bugfix that has been affecting some callers
- debugfs minor fix
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCX13Zhw8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ylfNQCfX4Bx9J1aLGr0/MOBwlXXEycChE0AmwQ9rXa7
u5Przdz+fMr1mLyNBaY5
=4kmo
-----END PGP SIGNATURE-----
Merge tag 'driver-core-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are some small driver core and debugfs fixes for 5.9-rc5
Included in here are:
- firmware loader memory leak fix
- firmware loader testing fixes for non-EFI systems
- device link locking fixes found by lockdep
- kobject_del() bugfix that has been affecting some callers
- debugfs minor fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'driver-core-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
test_firmware: Test platform fw loading on non-EFI systems
PM: <linux/device.h>: fix @em_pd kernel-doc warning
kobject: Drop unneeded conditional in __kobject_del()
driver core: Fix device_pm_lock() locking for device links
MAINTAINERS: Add the security document to SECURITY CONTACT
driver code: print symbolic error code
debugfs: Fix module state check condition
kobject: Restore old behaviour of kobject_del(NULL)
firmware_loader: fix memory leak for paged buffer
-----BEGIN PGP SIGNATURE-----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=JTfF
-----END PGP SIGNATURE-----
Merge tag 'for-5.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"A few more fixes:
- regression fix for a crash after failed snapshot creation
- one more lockep fix: use nofs allocation when allocating missing
device
- fix reloc tree leak on degraded mount
- make some extent buffer alignment checks less strict to mount
filesystems created by btrfs-convert"
* tag 'for-5.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix NULL pointer dereference after failure to create snapshot
btrfs: free data reloc tree on failed mount
btrfs: require only sector size alignment for parent eb bytenr
btrfs: fix lockdep splat in add_missing_dev
-----BEGIN PGP SIGNATURE-----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=JaQw
-----END PGP SIGNATURE-----
Merge tag '5.9-rc4-smb3-fix' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fix from Steve French:
"A fix for lookup on DFS link when cifsacl or modefromsid is used"
* tag '5.9-rc4-smb3-fix' of git://git.samba.org/sfrench/cifs-2.6:
cifs: fix DFS mount with cifsacl/modefromsid
This introduces some bug fixes including 1) SMR drive fix, 2) infinite loop
when building free node ids, 3) EOF at DIO read.
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEE00UqedjCtOrGVvQiQBSofoJIUNIFAl9Y0skACgkQQBSofoJI
UNKggA//a8cCkIx0wp1BEabPQ8x8TrHkiOVZX9zTbiaLkI9MLYweF0YFjbCx/i/t
41r6JbTxWLiM+GRI+u9kOrkBOUgTHAZThIBcWbfYKR5Jz7XdijhsuNYqRf8n33ya
u4PtT2AiMW3gt8gJML08eI/U+/rBBpI6fkc8Sza03iTCLjJiWwvZ99h2rPSfgmIw
UdyRuof3mPgUz12fQ8BoO/oQ5KhKgA7kxMsCc4UJE9VX/hBYamTfIEF1AmnxlyKn
HYhkXyuAmhEFEenBA+ts9YZXMubWHwcj4GlTkWTP6Ib+A3cIinHIqpzEaJnPQdWY
JPG72L2TNg0Mtl8w+46zJa1mr6KvXTA5GNowX4OTTf2oHxeHJ4sxax3cmvrDOIfe
7Ga8kGyi5OON1Hymwuyyz4KuKM9zvyUouX0i4wsiamm9kFQoxzNSbfsM5L0weCwM
MWVOFhtOUhrQdJ+zpbtJpF8Ijj3nuOoUpw3/hUhl3GM+J4bzE8MdzRmzB3JjkVCr
4mfYuXCITPOH31Fu3obXEFI/9kgyZdxk6OHsXLZCCfRCvgRTDfk5KFQx1OIY3jk0
I/yRjmvnOyD37GVXHyGZxjRplDCgCpTOL6HFk1GOLFUvuoQeOOqwwL0oa/J94ED0
nE80dqs4e8c3/YmUqcgiOm4d4EkdwVzhE9RxdUq7s2SJgh5Eu/o=
=gbal
-----END PGP SIGNATURE-----
Merge tag 'f2fs-for-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs fixes from Jaegeuk Kim:
"Small bug fixes for:
- SMR drive fix
- infinite loop when building free node ids
- EOF at DIO read"
* tag 'f2fs-for-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
f2fs: Return EOF on unaligned end of file DIO read
f2fs: fix indefinite loop scanning for free nid
f2fs: Fix type of section block count variables
Highlights include:
Bugfixes:
- Fix an NFS/RDMA resource leak
- Fix the error handling during delegation recall
- NFSv4.0 needs to return the delegation on a zero-stateid SETATTR
- Stop printk reading past end of string
-----BEGIN PGP SIGNATURE-----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=3fw2
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-5.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
- Fix an NFS/RDMA resource leak
- Fix the error handling during delegation recall
- NFSv4.0 needs to return the delegation on a zero-stateid SETATTR
- Stop printk reading past end of string
* tag 'nfs-for-5.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
SUNRPC: stop printk reading past end of string
NFS: Zero-stateid SETATTR should first return delegation
NFSv4.1 handle ERR_DELAY error reclaiming locking state on delegation recall
xprtrdma: Release in-flight MRs on disconnect
Reading past end of file returns EOF for aligned reads but -EINVAL for
unaligned reads on f2fs. While documentation is not strict about this
corner case, most filesystem returns EOF on this case, like iomap
filesystems. This patch consolidates the behavior for f2fs, by making
it return EOF(0).
it can be verified by a read loop on a file that does a partial read
before EOF (A file that doesn't end at an aligned address). The
following code fails on an unaligned file on f2fs, but not on
btrfs, ext4, and xfs.
while (done < total) {
ssize_t delta = pread(fd, buf + done, total - done, off + done);
if (!delta)
break;
...
}
It is arguable whether filesystems should actually return EOF or
-EINVAL, but since iomap filesystems support it, and so does the
original DIO code, it seems reasonable to consolidate on that.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
If the sbi->ckpt->next_free_nid is not NAT block aligned and if there
are free nids in that NAT block between the start of the block and
next_free_nid, then those free nids will not be scanned in scan_nat_page().
This results into mismatch between nm_i->available_nids and the sum of
nm_i->free_nid_count of all NAT blocks scanned. And nm_i->available_nids
will always be greater than the sum of free nids in all the blocks.
Under this condition, if we use all the currently scanned free nids,
then it will loop forever in f2fs_alloc_nid() as nm_i->available_nids
is still not zero but nm_i->free_nid_count of that partially scanned
NAT block is zero.
Fix this to align the nm_i->next_scan_nid to the first nid of the
corresponding NAT block.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Commit da52f8ade4 ("f2fs: get the right gc victim section when section
has several segments") added code to count blocks of each section using
variables with type 'unsigned short', which has 2 bytes size in many
systems. However, the counts can be larger than the 2 bytes range and
type conversion results in wrong values. Especially when the f2fs
sections have blocks as many as USHRT_MAX + 1, the count is handled as 0.
This triggers eternal loop in init_dirty_segmap() at mount system call.
Fix this by changing the type of the variables to block_t.
Fixes: da52f8ade4 ("f2fs: get the right gc victim section when section has several segments")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
While testing a weird problem with -o degraded, I noticed I was getting
leaked root errors
BTRFS warning (device loop0): writable mount is not allowed due to too many missing devices
BTRFS error (device loop0): open_ctree failed
BTRFS error (device loop0): leaked root -9-0 refcount 1
This is the DATA_RELOC root, which gets read before the other fs roots,
but is included in the fs roots radix tree. Handle this by adding a
btrfs_drop_and_free_fs_root() on the data reloc root if it exists. This
is ok to do here if we fail further up because we will only drop the ref
if we delete the root from the radix tree, and all other cleanup won't
be duplicated.
CC: stable@vger.kernel.org # 5.8+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
A completely sane converted fs will cause kernel warning at balance
time:
[ 1557.188633] BTRFS info (device sda7): relocating block group 8162107392 flags data
[ 1563.358078] BTRFS info (device sda7): found 11722 extents
[ 1563.358277] BTRFS info (device sda7): leaf 7989321728 gen 95 total ptrs 213 free space 3458 owner 2
[ 1563.358280] item 0 key (7984947200 169 0) itemoff 16250 itemsize 33
[ 1563.358281] extent refs 1 gen 90 flags 2
[ 1563.358282] ref#0: tree block backref root 4
[ 1563.358285] item 1 key (7985602560 169 0) itemoff 16217 itemsize 33
[ 1563.358286] extent refs 1 gen 93 flags 258
[ 1563.358287] ref#0: shared block backref parent 7985602560
[ 1563.358288] (parent 7985602560 is NOT ALIGNED to nodesize 16384)
[ 1563.358290] item 2 key (7985635328 169 0) itemoff 16184 itemsize 33
...
[ 1563.358995] BTRFS error (device sda7): eb 7989321728 invalid extent inline ref type 182
[ 1563.358996] ------------[ cut here ]------------
[ 1563.359005] WARNING: CPU: 14 PID: 2930 at 0xffffffff9f231766
Then with transaction abort, and obviously failed to balance the fs.
[CAUSE]
That mentioned inline ref type 182 is completely sane, it's
BTRFS_SHARED_BLOCK_REF_KEY, it's some extra check making kernel to
believe it's invalid.
Commit 64ecdb647d ("Btrfs: add one more sanity check for shared ref
type") introduced extra checks for backref type.
One of the requirement is, parent bytenr must be aligned to node size,
which is not correct.
One example is like this:
0 1G 1G+4K 2G 2G+4K
| |///////////////////|//| <- A chunk starts at 1G+4K
| | <- A tree block get reserved at bytenr 1G+4K
Then we have a valid tree block at bytenr 1G+4K, but not aligned to
nodesize (16K).
Such chunk is not ideal, but current kernel can handle it pretty well.
We may warn about such tree block in the future, but should not reject
them.
[FIX]
Change the alignment requirement from node size alignment to sector size
alignment.
Also, to make our lives a little easier, also output @iref when
btrfs_get_extent_inline_ref_type() failed, so we can locate the item
easier.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205475
Fixes: 64ecdb647d ("Btrfs: add one more sanity check for shared ref type")
CC: stable@vger.kernel.org # 4.14+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update comments and messages ]
Signed-off-by: David Sterba <dsterba@suse.com>
Nikolay reported a lockdep splat in generic/476 that I could reproduce
with btrfs/187.
======================================================
WARNING: possible circular locking dependency detected
5.9.0-rc2+ #1 Tainted: G W
------------------------------------------------------
kswapd0/100 is trying to acquire lock:
ffff9e8ef38b6268 (&delayed_node->mutex){+.+.}-{3:3}, at: __btrfs_release_delayed_node.part.0+0x3f/0x330
but task is already holding lock:
ffffffffa9d74700 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x5/0x30
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (fs_reclaim){+.+.}-{0:0}:
fs_reclaim_acquire+0x65/0x80
slab_pre_alloc_hook.constprop.0+0x20/0x200
kmem_cache_alloc_trace+0x3a/0x1a0
btrfs_alloc_device+0x43/0x210
add_missing_dev+0x20/0x90
read_one_chunk+0x301/0x430
btrfs_read_sys_array+0x17b/0x1b0
open_ctree+0xa62/0x1896
btrfs_mount_root.cold+0x12/0xea
legacy_get_tree+0x30/0x50
vfs_get_tree+0x28/0xc0
vfs_kern_mount.part.0+0x71/0xb0
btrfs_mount+0x10d/0x379
legacy_get_tree+0x30/0x50
vfs_get_tree+0x28/0xc0
path_mount+0x434/0xc00
__x64_sys_mount+0xe3/0x120
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xa9
-> #1 (&fs_info->chunk_mutex){+.+.}-{3:3}:
__mutex_lock+0x7e/0x7e0
btrfs_chunk_alloc+0x125/0x3a0
find_free_extent+0xdf6/0x1210
btrfs_reserve_extent+0xb3/0x1b0
btrfs_alloc_tree_block+0xb0/0x310
alloc_tree_block_no_bg_flush+0x4a/0x60
__btrfs_cow_block+0x11a/0x530
btrfs_cow_block+0x104/0x220
btrfs_search_slot+0x52e/0x9d0
btrfs_lookup_inode+0x2a/0x8f
__btrfs_update_delayed_inode+0x80/0x240
btrfs_commit_inode_delayed_inode+0x119/0x120
btrfs_evict_inode+0x357/0x500
evict+0xcf/0x1f0
vfs_rmdir.part.0+0x149/0x160
do_rmdir+0x136/0x1a0
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xa9
-> #0 (&delayed_node->mutex){+.+.}-{3:3}:
__lock_acquire+0x1184/0x1fa0
lock_acquire+0xa4/0x3d0
__mutex_lock+0x7e/0x7e0
__btrfs_release_delayed_node.part.0+0x3f/0x330
btrfs_evict_inode+0x24c/0x500
evict+0xcf/0x1f0
dispose_list+0x48/0x70
prune_icache_sb+0x44/0x50
super_cache_scan+0x161/0x1e0
do_shrink_slab+0x178/0x3c0
shrink_slab+0x17c/0x290
shrink_node+0x2b2/0x6d0
balance_pgdat+0x30a/0x670
kswapd+0x213/0x4c0
kthread+0x138/0x160
ret_from_fork+0x1f/0x30
other info that might help us debug this:
Chain exists of:
&delayed_node->mutex --> &fs_info->chunk_mutex --> fs_reclaim
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(fs_reclaim);
lock(&fs_info->chunk_mutex);
lock(fs_reclaim);
lock(&delayed_node->mutex);
*** DEADLOCK ***
3 locks held by kswapd0/100:
#0: ffffffffa9d74700 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x5/0x30
#1: ffffffffa9d65c50 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x115/0x290
#2: ffff9e8e9da260e0 (&type->s_umount_key#48){++++}-{3:3}, at: super_cache_scan+0x38/0x1e0
stack backtrace:
CPU: 1 PID: 100 Comm: kswapd0 Tainted: G W 5.9.0-rc2+ #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
Call Trace:
dump_stack+0x92/0xc8
check_noncircular+0x12d/0x150
__lock_acquire+0x1184/0x1fa0
lock_acquire+0xa4/0x3d0
? __btrfs_release_delayed_node.part.0+0x3f/0x330
__mutex_lock+0x7e/0x7e0
? __btrfs_release_delayed_node.part.0+0x3f/0x330
? __btrfs_release_delayed_node.part.0+0x3f/0x330
? lock_acquire+0xa4/0x3d0
? btrfs_evict_inode+0x11e/0x500
? find_held_lock+0x2b/0x80
__btrfs_release_delayed_node.part.0+0x3f/0x330
btrfs_evict_inode+0x24c/0x500
evict+0xcf/0x1f0
dispose_list+0x48/0x70
prune_icache_sb+0x44/0x50
super_cache_scan+0x161/0x1e0
do_shrink_slab+0x178/0x3c0
shrink_slab+0x17c/0x290
shrink_node+0x2b2/0x6d0
balance_pgdat+0x30a/0x670
kswapd+0x213/0x4c0
? _raw_spin_unlock_irqrestore+0x46/0x60
? add_wait_queue_exclusive+0x70/0x70
? balance_pgdat+0x670/0x670
kthread+0x138/0x160
? kthread_create_worker_on_cpu+0x40/0x40
ret_from_fork+0x1f/0x30
This is because we are holding the chunk_mutex when we call
btrfs_alloc_device, which does a GFP_KERNEL allocation. We don't want
to switch that to a GFP_NOFS lock because this is the only place where
it matters. So instead use memalloc_nofs_save() around the allocation
in order to avoid the lockdep splat.
Reported-by: Nikolay Borisov <nborisov@suse.com>
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
RHBZ: 1871246
If during cifs_lookup()/get_inode_info() we encounter a DFS link
and we use the cifsacl or modefromsid mount options we must suppress
any -EREMOTE errors that triggers or else we will not be able to follow
the DFS link and automount the target.
This fixes an issue with modefromsid/cifsacl where these mountoptions
would break DFS and we would no longer be able to access the share.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
-----BEGIN PGP SIGNATURE-----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=v5QQ
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.9-2020-09-06' of git://git.kernel.dk/linux-block
Pull more io_uring fixes from Jens Axboe:
"Two followup fixes. One is fixing a regression from this merge window,
the other is two commits fixing cancelation of deferred requests.
Both have gone through full testing, and both spawned a few new
regression test additions to liburing.
- Don't play games with const, properly store the output iovec and
assign it as needed.
- Deferred request cancelation fix (Pavel)"
* tag 'io_uring-5.9-2020-09-06' of git://git.kernel.dk/linux-block:
io_uring: fix linked deferred ->files cancellation
io_uring: fix cancel of deferred reqs with ->files
io_uring: fix explicit async read/write mapping for large segments
While looking for ->files in ->defer_list, consider that requests there
may actually be links.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
While trying to cancel requests with ->files, it also should look for
requests in ->defer_list, otherwise it might end up hanging a thread.
Cancel all requests in ->defer_list up to the last request there with
matching ->files, that's needed to follow drain ordering semantics.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Fix a broken metadata verifier that would incorrectly validate attr
fork extents of a realtime file against the realtime volume.
-----BEGIN PGP SIGNATURE-----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=5U8o
-----END PGP SIGNATURE-----
Merge tag 'xfs-5.9-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fix from Darrick Wong:
"Fix a broken metadata verifier that would incorrectly validate attr
fork extents of a realtime file against the realtime volume"
* tag 'xfs-5.9-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix xfs_bmap_validate_extent_raw when checking attr fork of rt files
When running in a dax mode, if the user maps a page with MAP_PRIVATE and
PROT_WRITE, the xfs filesystem would incorrectly update ctime and mtime
when the user hits a COW fault.
This breaks building of the Linux kernel. How to reproduce:
1. extract the Linux kernel tree on dax-mounted xfs filesystem
2. run make clean
3. run make -j12
4. run make -j12
at step 4, make would incorrectly rebuild the whole kernel (although it
was already built in step 3).
The reason for the breakage is that almost all object files depend on
objtool. When we run objtool, it takes COW page fault on its .data
section, and these faults will incorrectly update the timestamp of the
objtool binary. The updated timestamp causes make to rebuild the whole
tree.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
