During the time, the function has been shrunk to the point that it just
calls find_extent_buffer, just passing the parameters.
Signed-off-by: David Sterba <dsterba@suse.com>
We dereference fs_info several times, besides that post-mount functions
should never see a NULL fs_info.
Signed-off-by: David Sterba <dsterba@suse.com>
The lock is held, we make the same lookup that previously failed with
EEXIST and we don't insert NULL pointers.
Signed-off-by: David Sterba <dsterba@suse.com>
Originally, the eb and start were passed separately in case eb is NULL.
Since the readahead has been refactored in 4.6, this is not true anymore
and we can get rid of the parameter.
Signed-off-by: David Sterba <dsterba@suse.com>
'start' is not used since "btrfs: reada: Pass reada_extent into
__readahead_hook directly" (6e39dbe8b9).
Signed-off-by: David Sterba <dsterba@suse.com>
We can't touch the eb directly in case the function is called with a
non-zero error, so we can read the eb level when needed.
Signed-off-by: David Sterba <dsterba@suse.com>
The helpers are not meant to be generic, the name is misleading. Convert
them to static inlines for type checking.
Signed-off-by: David Sterba <dsterba@suse.com>
They're not even documented anywhere, letting users with no recourse but
to RTFS. It's no big burden to output the bitfield as words.
Also, display unknown flags as hex.
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: David Sterba <dsterba@suse.com>
My QEMU VM was seeing inexplicable I/O errors that I tracked down to
errors coming from the qcow2 virtual drive in the host system. The qcow2
file is a nocow file on my Btrfs drive, which QEMU opens with O_DIRECT.
Every once in awhile, pread() or pwrite() would return EEXIST, which
makes no sense. This turned out to be a bug in btrfs_get_extent().
Commit 8dff9c8534 ("Btrfs: deal with duplciates during extent_map
insertion in btrfs_get_extent") fixed a case in btrfs_get_extent() where
two threads race on adding the same extent map to an inode's extent map
tree. However, if the added em is merged with an adjacent em in the
extent tree, then we'll end up with an existing extent that is not
identical to but instead encompasses the extent we tried to add. When we
call merge_extent_mapping() to find the nonoverlapping part of the new
em, the arithmetic overflows because there is no such thing. We then end
up trying to add a bogus em to the em_tree, which results in a EEXIST
that can bubble all the way up to userspace.
Fix it by extending the identical extent map special case.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Tickets_id's name may result in some misunderstandings, it just indicates
the next ticket will be handled and is not stored per ticket.
Fixes: ce12965 ("btrfs: introduce tickets_id to determine whether
asynchronous metadata reclaim work makes progress")
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_map_block supports different types of mappings, which to a large
extent resemble block layer operations. But they don't always do, and
currently btrfs dangerously overlays it's own flag over the block layer
flags. This is just asking for a conflict, so introduce a different
map flags enum inside of btrfs instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Botched calculation of number of pages. As the result,
we were dropping pieces when doing splice to pipe from
e.g. 9p.
Reported-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Stable Bugfixes:
- Hide array-bounds warning
Bugfixes:
- Keep a reference on lock states while checking
- Handle NFS4ERR_OLD_STATEID in nfs4_reclaim_open_state
- Don't call close if the open stateid has already been cleared
- Fix CLOSE rases with OPEN
- Fix a regression in DELEGRETURN
-----BEGIN PGP SIGNATURE-----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=YhQv
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.9-4' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client bugfixes from Anna Schumaker:
"Most of these fix regressions or races, but there is one patch for
stable that Arnd sent me
Stable bugfix:
- Hide array-bounds warning
Bugfixes:
- Keep a reference on lock states while checking
- Handle NFS4ERR_OLD_STATEID in nfs4_reclaim_open_state
- Don't call close if the open stateid has already been cleared
- Fix CLOSE rases with OPEN
- Fix a regression in DELEGRETURN"
* tag 'nfs-for-4.9-4' of git://git.linux-nfs.org/projects/anna/linux-nfs:
NFSv4.x: hide array-bounds warning
NFSv4.1: Keep a reference on lock states while checking
NFSv4.1: Handle NFS4ERR_OLD_STATEID in nfs4_reclaim_open_state
NFSv4: Don't call close if the open stateid has already been cleared
NFSv4: Fix CLOSE races with OPEN
NFSv4.1: Fix a regression in DELEGRETURN
A correct bugfix introduced a harmless warning that shows up with gcc-7:
fs/nfs/callback.c: In function 'nfs_callback_up':
fs/nfs/callback.c:214:14: error: array subscript is outside array bounds [-Werror=array-bounds]
What happens here is that the 'minorversion == 0' check tells the
compiler that we assume minorversion can be something other than 0,
but when CONFIG_NFS_V4_1 is disabled that would be invalid and
result in an out-of-bounds access.
The added check for IS_ENABLED(CONFIG_NFS_V4_1) tells gcc that this
really can't happen, which makes the code slightly smaller and also
avoids the warning.
The bugfix that introduced the warning is marked for stable backports,
we want this one backported to the same releases.
Fixes: 98b0f80c23 ("NFSv4.x: Fix a refcount leak in nfs_callback_up_net")
Cc: stable@vger.kernel.org # v3.7+
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
While walking the list of lock_states, keep a reference on each
nfs4_lock_state to be checked, otherwise the lock state could be removed
while the check performs TEST_STATEID and possible FREE_STATEID.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
panic the kernel) and some fixes for CONFIG_VMAP_STACK.
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEK2m5VNv+CHkogTfJ8vlZVpUNgaMFAlgxCMoACgkQ8vlZVpUN
gaOX3Af/QOphB5pKrKijhDK9H40nKS6lHtL7klJpvRafUMtVxBDOP3dsRISyGMdF
w+gQQQv+eFEPefwGcYzdO4PN7FFVirAF9RS/NTFSIB/c8V6FfHzn/DeiftU7CLRW
ljTP7y8M9eo35TsU8s9D7wfbyfY55MEANiAP8vnpx4JKDb86I/8Eaa6YS91v17vp
/7TKSUt7PE6UUp7mgTRCX8vK9SxJJ8Xvg2hSzulfrO1DdsfW61RQYXwif+biR85T
uxFPnV0yvji2EU4cpeIekPqJKUb9Av0aIbSwg19QqcAE0xqxvtSRBKlYnF2IRTuv
OXoaC30d4UcQrNCkxPDAdH/0BMdcNQ==
=y+5G
-----END PGP SIGNATURE-----
Merge tag 'ext4_for_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"A security fix (so a maliciously corrupted file system image won't
panic the kernel) and some fixes for CONFIG_VMAP_STACK"
* tag 'ext4_for_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: sanity check the block and cluster size at mount time
fscrypto: don't use on-stack buffer for key derivation
fscrypto: don't use on-stack buffer for filename encryption
With the new (in 4.9) option to use a virtually-mapped stack
(CONFIG_VMAP_STACK), stack buffers cannot be used as input/output for
the scatterlist crypto API because they may not be directly mappable to
struct page. get_crypt_info() was using a stack buffer to hold the
output from the encryption operation used to derive the per-file key.
Fix it by using a heap buffer.
This bug could most easily be observed in a CONFIG_DEBUG_SG kernel
because this allowed the BUG in sg_set_buf() to be triggered.
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
With the new (in 4.9) option to use a virtually-mapped stack
(CONFIG_VMAP_STACK), stack buffers cannot be used as input/output for
the scatterlist crypto API because they may not be directly mappable to
struct page. For short filenames, fname_encrypt() was encrypting a
stack buffer holding the padded filename. Fix it by encrypting the
filename in-place in the output buffer, thereby making the temporary
buffer unnecessary.
This bug could most easily be observed in a CONFIG_DEBUG_SG kernel
because this allowed the BUG in sg_set_buf() to be triggered.
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Now that we're doing TEST_STATEID in nfs4_reclaim_open_state(), we can have
a NFS4ERR_OLD_STATEID returned from nfs41_open_expired() . Instead of
marking state recovery as failed, mark the state for recovery again.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Ensure we test to see if the open stateid is actually set, before we
send a CLOSE.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
If the reply to a successful CLOSE call races with an OPEN to the same
file, we can end up scribbling over the stateid that represents the
new open state.
The race looks like:
Client Server
====== ======
CLOSE stateid A on file "foo"
CLOSE stateid A, return stateid C
OPEN file "foo"
OPEN "foo", return stateid B
Receive reply to OPEN
Reset open state for "foo"
Associate stateid B to "foo"
Receive CLOSE for A
Reset open state for "foo"
Replace stateid B with C
The fix is to examine the argument of the CLOSE, and check for a match
with the current stateid "other" field. If the two do not match, then
the above race occurred, and we should just ignore the CLOSE.
Reported-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
We don't want to call nfs4_free_revoked_stateid() in the case where
the delegreturn was successful.
Reported-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Pull vfs fixes from Al Viro:
"A couple of regression fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fix iov_iter_advance() for ITER_PIPE
xattr: Fix setting security xattrs on sockfs
Without ".owner = THIS_MODULE" it is possible to crash the kernel
by unloading the Orangefs module while someone is reading debugfs
files.
-----BEGIN PGP SIGNATURE-----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=s21f
-----END PGP SIGNATURE-----
Merge tag 'for-linus-4.9-rc5-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull orangefs fix from Mike Marshall:
"orangefs: add .owner to debugfs file_operations
Without ".owner = THIS_MODULE" it is possible to crash the kernel by
unloading the Orangefs module while someone is reading debugfs files"
* tag 'for-linus-4.9-rc5-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
orangefs: add .owner to debugfs file_operations
The IOP_XATTR flag is set on sockfs because sockfs supports getting the
"system.sockprotoname" xattr. Since commit 6c6ef9f2, this flag is checked for
setxattr support as well. This is wrong on sockfs because security xattr
support there is supposed to be provided by security_inode_setsecurity. The
smack security module relies on socket labels (xattrs).
Fix this by adding a security xattr handler on sockfs that returns
-EAGAIN, and by checking for -EAGAIN in setxattr.
We cannot simply check for -EOPNOTSUPP in setxattr because there are
filesystems that neither have direct security xattr support nor support
via security_inode_setsecurity. A more proper fix might be to move the
call to security_inode_setsecurity into sockfs, but it's not clear to me
if that is safe: we would end up calling security_inode_post_setxattr after
that as well.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull fuse fixes from Miklos Szeredi:
"A regression fix and bug fix bound for stable"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: fix fuse_write_end() if zero bytes were copied
fuse: fix root dentry initialization
Without ".owner = THIS_MODULE" it is possible to crash the kernel
by unloading the Orangefs module while someone is reading debugfs
files.
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
If pos is at the beginning of a page and copied is zero then page is not
zeroed but is marked uptodate.
Fix by skipping everything except unlock/put of page if zero bytes were
copied.
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 6b12c1b37e ("fuse: Implement write_begin/write_end callbacks")
Cc: <stable@vger.kernel.org> # v3.15+
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Pull VFS fixes from Al Viro:
"Christoph's and Jan's aio fixes, fixup for generic_file_splice_read
(removal of pointless detritus that actually breaks it when used for
gfs2 ->splice_read()) and fixup for generic_file_read_iter()
interaction with ITER_PIPE destinations."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
splice: remove detritus from generic_file_splice_read()
mm/filemap: don't allow partially uptodate page for pipes
aio: fix freeze protection of aio writes
fs: remove aio_run_iocb
fs: remove the never implemented aio_fsync file operation
aio: hold an extra file reference over AIO read/write operations
generic_file_splice_read() code that went into -rc1. Switch to the
less efficient default_file_splice_read() for now; the proper fix is
being held for 4.10.
We also have a fix for a 4.8 regression and a trival libceph fixup.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQEcBAABCAAGBQJYJdjPAAoJEEp/3jgCEfOLzEoH/A3B1qqiqs2WoMn0O4pnEdcM
TxaU46VOkYcK2wh/xbYAns2kZEXKgcCySv+kXn4l3Gh6/lXVxv4WexNqWdO1o6yN
GqEufIH7yQM6QOE/hkwtUciBXmPfQMPxF14vvprYQuyu5Bs96mrphiAa7vX6Vbk5
VhfE/j0shb8Q2QQj/Om0mWqM6JtOAlr5aFtEcJcodbCk1k8CptUcBsSoQ31PXMC7
UcaBHh1VHGLvx9WeG1Rw1g9tc2LiUyu+UK0csolp51+amB7HezgfmzDQzHtXzBmm
n90SQwonf0DrdWUGuQlOpHnREwxLSgN19s68FCjLc0jeMTP4b6TFEIUgFxiqWc4=
=Ws5s
-----END PGP SIGNATURE-----
Merge tag 'ceph-for-4.9-rc5' of git://github.com/ceph/ceph-client
Pull Ceph fixes from Ilya Dryomov:
"Ceph's ->read_iter() implementation is incompatible with the new
generic_file_splice_read() code that went into -rc1. Switch to the
less efficient default_file_splice_read() for now; the proper fix is
being held for 4.10.
We also have a fix for a 4.8 regression and a trival libceph fixup"
* tag 'ceph-for-4.9-rc5' of git://github.com/ceph/ceph-client:
libceph: initialize last_linger_id with a large integer
libceph: fix legacy layout decode with pool 0
ceph: use default file splice read callback
Bugfixes:
- Trim extra slashes in v4 nfs_paths to fix tools that use this
- Fix a -Wmaybe-uninitialized warnings
- Fix suspicious RCU usages
- Fix Oops when mounting multiple servers at once
- Suppress a false-positive pNFS error
- Fix a DMAR failure in NFS over RDMA
-----BEGIN PGP SIGNATURE-----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=hFod
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.9-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client bugfixes from Anna Schumaker:
"Most of these fix regressions in 4.9, and none are going to stable
this time around.
Bugfixes:
- Trim extra slashes in v4 nfs_paths to fix tools that use this
- Fix a -Wmaybe-uninitialized warnings
- Fix suspicious RCU usages
- Fix Oops when mounting multiple servers at once
- Suppress a false-positive pNFS error
- Fix a DMAR failure in NFS over RDMA"
* tag 'nfs-for-4.9-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
xprtrdma: Fix DMAR failure in frwr_op_map() after reconnect
fs/nfs: Fix used uninitialized warn in nfs4_slot_seqid_in_use()
NFS: Don't print a pNFS error if we aren't using pNFS
NFS: Ignore connections that have cl_rpcclient uninitialized
SUNRPC: Fix suspicious RCU usage
NFSv4.1: work around -Wmaybe-uninitialized warning
NFS: Trim extra slash in v4 nfs_path
In this update:
o fix for aborting deferred transactions on filesystem shutdown.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=62jA
-----END PGP SIGNATURE-----
Merge tag 'xfs-fixes-for-linus-4.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
Pull xfs fix from Dave Chinner:
"This is a fix for an unmount hang (regression) when the filesystem is
shutdown. It was supposed to go to you for -rc3, but I accidentally
tagged the commit prior to it in that pullreq.
Summary:
- fix for aborting deferred transactions on filesystem shutdown"
* tag 'xfs-fixes-for-linus-4.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs:
xfs: defer should abort intent items if the trans roll fails
It could be not possible to freeze coredumping task when it waits for
'core_state->startup' completion, because threads are frozen in
get_signal() before they got a chance to complete 'core_state->startup'.
Inability to freeze a task during suspend will cause suspend to fail.
Also CRIU uses cgroup freezer during dump operation. So with an
unfreezable task the CRIU dump will fail because it waits for a
transition from 'FREEZING' to 'FROZEN' state which will never happen.
Use freezer_do_not_count() to tell freezer to ignore coredumping task
while it waits for core_state->startup completion.
Link: http://lkml.kernel.org/r/1475225434-3753-1-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Tejun Heo <tj@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
i_size check is a leftover from the horrors that used to play with
the page cache in that function. With the switch to ->read_iter(),
it's neither needed nor correct - for gfs2 it ends up being buggy,
since i_size is not guaranteed to be correct until later (inside
->read_iter()).
Spotted-by: Abhi Das <adas@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Splice read/write implementation changed recently. When using
generic_file_splice_read(), iov_iter with type == ITER_PIPE is
passed to filesystem's read_iter callback. But ceph_sync_read()
can't serve ITER_PIPE iov_iter correctly (ITER_PIPE iov_iter
expects pages from page cache).
Fixing ceph_sync_read() requires a big patch. So use default
splice read callback for now.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
The refactor seemed to trigger dan.carpenter@oracle.com's
static tester to find a possible double-free in the code.
While designing the fix we saw a condition under which the
buffer being freed could also be overflowed.
We also realized how to rebuild the related debugfs file's
"contents" (a string) without deleting and re-creating the file.
This fix should eliminate the possible double-free, the
potential overflow and improve code readability.
-----BEGIN PGP SIGNATURE-----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=ELyS
-----END PGP SIGNATURE-----
Merge tag 'for-linus-4.9-rc4-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull orangefs fix from Mike Marshall:
"We recently refactored the Orangefs debugfs code. The refactor seemed
to trigger dan.carpenter@oracle.com's static tester to find a possible
double-free in the code.
While designing the fix we saw a condition under which the buffer
being freed could also be overflowed.
We also realized how to rebuild the related debugfs file's "contents"
(a string) without deleting and re-creating the file.
This fix should eliminate the possible double-free, the potential
overflow and improve code readability"
* tag 'for-linus-4.9-rc4-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
orangefs: clean up debugfs
Fix the following warn:
fs/nfs/nfs4session.c: In function ‘nfs4_slot_seqid_in_use’:
fs/nfs/nfs4session.c:203:54: warning: ‘cur_seq’ may be used uninitialized in this function [-Wmaybe-uninitialized]
if (nfs4_slot_get_seqid(tbl, slotid, &cur_seq) == 0 &&
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
cur_seq == seq_nr && test_bit(slotid, tbl->used_slots))
~~~~~~~~~~~~~~~~~
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
We used to check for a valid layout type id before verifying pNFS flags
as an indicator for if we are using pNFS. This changed in 3132e49ece
with the introduction of multiple layout types, since now we are passing
an array of ids instead of just one. Since then, users have been seeing
a KERN_ERR printk show up whenever mounting NFS v4 without pNFS. This
patch restores the original behavior of exiting set_pnfs_layoutdriver()
early if we aren't using pNFS.
Fixes 3132e49ece ("pnfs: track multiple layout types in fsinfo
structure")
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
cl_rpcclient starts as ERR_PTR(-EINVAL), and connections like that
are floating freely through the system. Most places check whether
pointer is valid before dereferencing it, but newly added code
in nfs_match_client does not.
Which causes crashes when more than one NFS mount point is present.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
We recently refactored the Orangefs debugfs code.
The refactor seemed to trigger dan.carpenter@oracle.com's
static tester to find a possible double-free in the code.
While designing the fix we saw a condition under which the
buffer being freed could also be overflowed.
We also realized how to rebuild the related debugfs file's
"contents" (a string) without deleting and re-creating the file.
This fix should eliminate the possible double-free, the
potential overflow and improve code readability.
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
stack change (after which we can no longer encrypt stuff on the stack).
-----BEGIN PGP SIGNATURE-----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=oPbZ
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.9-1' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from Bruce Fields:
"Fixes for some recent regressions including fallout from the vmalloc'd
stack change (after which we can no longer encrypt stuff on the
stack)"
* tag 'nfsd-4.9-1' of git://linux-nfs.org/~bfields/linux:
nfsd: Fix general protection fault in release_lock_stateid()
svcrdma: backchannel cannot share a page for send and rcv buffers
sunrpc: fix some missing rq_rbuffer assignments
sunrpc: don't pass on-stack memory to sg_set_buf
nfsd: move blocked lock handling under a dedicated spinlock
Pull btrfs fixes from Chris Mason:
"Some fixes that Dave Sterba collected. We held off on these last week
because I was focused on the memory corruption testing"
* 'for-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix WARNING in btrfs_select_ref_head()
Btrfs: remove some no-op casts
btrfs: pass correct args to btrfs_async_run_delayed_refs()
btrfs: make file clone aware of fatal signals
btrfs: qgroup: Prevent qgroup->reserved from going subzero
Btrfs: kill BUG_ON in do_relocation
Pull overlayfs fixes from Miklos Szeredi:
"Fix two more POSIX ACL bugs introduced in 4.8 and add a missing fsync
during copy up to prevent possible data loss"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: fsync after copy-up
ovl: fix get_acl() on tmpfs
ovl: update S_ISGID when setting posix ACLs
Make sure the copied up file hits the disk before renaming to the final
destination. If this is not done then the copy-up may corrupt the data in
the file in case of a crash.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org>
tmpfs doesn't have ->get_acl() because it only uses cached acls.
This fixes the acl tests in pjdfstest when tmpfs is used as the upper layer
of the overlay.
Reported-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 39a25b2b37 ("ovl: define ->get_acl() for overlay inodes")
Cc: <stable@vger.kernel.org> # v4.8
This change fixes xfstest generic/375, which failed to clear the
setgid bit in the following test case on overlayfs:
touch $testfile
chown 100:100 $testfile
chmod 2755 $testfile
_runas -u 100 -g 101 -- setfacl -m u::rwx,g::rwx,o::rwx $testfile
Reported-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Tested-by: Amir Goldstein <amir73il@gmail.com>
Fixes: d837a49bd5 ("ovl: fix POSIX ACL setting")
Cc: <stable@vger.kernel.org> # v4.8
Currently we dropped freeze protection of aio writes just after IO was
submitted. Thus aio write could be in flight while the filesystem was
frozen and that could result in unexpected situation like aio completion
wanting to convert extent type on frozen filesystem. Testcase from
Dmitry triggering this is like:
for ((i=0;i<60;i++));do fsfreeze -f /mnt ;sleep 1;fsfreeze -u /mnt;done &
fio --bs=4k --ioengine=libaio --iodepth=128 --size=1g --direct=1 \
--runtime=60 --filename=/mnt/file --name=rand-write --rw=randwrite
Fix the problem by dropping freeze protection only once IO is completed
in aio_complete().
Reported-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
[hch: forward ported on top of various VFS and aio changes]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pass the ABI iocb structure to aio_setup_rw and let it handle the
non-vectored I/O case as well. With that and a new helper for the AIO
return value handling we can now define new aio_read and aio_write
helpers that implement reads and writes in a self-contained way without
duplicating too much code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Otherwise we might dereference an already freed file and/or inode
when aio_complete is called before we return from the read_iter or
write_iter method.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull networking fixes from David Miller:
"Lots of fixes, mostly drivers as is usually the case.
1) Don't treat zero DMA address as invalid in vmxnet3, from Alexey
Khoroshilov.
2) Fix element timeouts in netfilter's nft_dynset, from Anders K.
Pedersen.
3) Don't put aead_req crypto struct on the stack in mac80211, from
Ard Biesheuvel.
4) Several uninitialized variable warning fixes from Arnd Bergmann.
5) Fix memory leak in cxgb4, from Colin Ian King.
6) Fix bpf handling of VLAN header push/pop, from Daniel Borkmann.
7) Several VRF semantic fixes from David Ahern.
8) Set skb->protocol properly in ip6_tnl_xmit(), from Eli Cooper.
9) Socket needs to be locked in udp_disconnect(), from Eric Dumazet.
10) Div-by-zero on 32-bit fix in mlx4 driver, from Eugenia Emantayev.
11) Fix stale link state during failover in NCSCI driver, from Gavin
Shan.
12) Fix netdev lower adjacency list traversal, from Ido Schimmel.
13) Propvide proper handle when emitting notifications of filter
deletes, from Jamal Hadi Salim.
14) Memory leaks and big-endian issues in rtl8xxxu, from Jes Sorensen.
15) Fix DESYNC_FACTOR handling in ipv6, from Jiri Bohac.
16) Several routing offload fixes in mlxsw driver, from Jiri Pirko.
17) Fix broadcast sync problem in TIPC, from Jon Paul Maloy.
18) Validate chunk len before using it in SCTP, from Marcelo Ricardo
Leitner.
19) Revert a netns locking change that causes regressions, from Paul
Moore.
20) Add recursion limit to GRO handling, from Sabrina Dubroca.
21) GFP_KERNEL in irq context fix in ibmvnic, from Thomas Falcon.
22) Avoid accessing stale vxlan/geneve socket in data path, from
Pravin Shelar"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (189 commits)
geneve: avoid using stale geneve socket.
vxlan: avoid using stale vxlan socket.
qede: Fix out-of-bound fastpath memory access
net: phy: dp83848: add dp83822 PHY support
enic: fix rq disable
tipc: fix broadcast link synchronization problem
ibmvnic: Fix missing brackets in init_sub_crq_irqs
ibmvnic: Fix releasing of sub-CRQ IRQs in interrupt context
Revert "ibmvnic: Fix releasing of sub-CRQ IRQs in interrupt context"
arch/powerpc: Update parameters for csum_tcpudp_magic & csum_tcpudp_nofold
net/mlx4_en: Save slave ethtool stats command
net/mlx4_en: Fix potential deadlock in port statistics flow
net/mlx4: Fix firmware command timeout during interrupt test
net/mlx4_core: Do not access comm channel if it has not yet been initialized
net/mlx4_en: Fix panic during reboot
net/mlx4_en: Process all completions in RX rings after port goes up
net/mlx4_en: Resolve dividing by zero in 32-bit system
net/mlx4_core: Change the default value of enable_qos
net/mlx4_core: Avoid setting ports to auto when only one port type is supported
net/mlx4_core: Fix the resource-type enum in res tracker to conform to FW spec
...
- A regression wrt. overlayfs, introduced in -rc2.
- An UBI issue, found by Dan Carpenter's static checker.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQIcBAABAgAGBQJYFPHWAAoJEEtJtSqsAOnWcK4P/AwBcqPa0em/HXrdCExanQXY
8U3uCPbDua4sW1Eaw5dVFoZuVoPzhibLLaVoVIWs8LOXiD8v23VYQ8ezu0D0O9fc
cAsrxg0MtQLF/hyyVbdihxaqCB2H/j9PDJdIdCiRindPEwm0k6KBkVMk3N8O3m2U
xDSA+Oq8Ns5cgjx+yfOhMJbGOFUzky26SV/M+PTAIU9Sj2w7RJS9R18BtWv4EFoK
q1sT8aEte3kryb+v/a4s9RNzWOOHqRvZ4XizOMvma9I6uX6hOU4oeLknmJx1gPnb
U5z75uAVn+IeNRnrco3pD91N3X9hEtv4IgZhFafNseVTY9MirDX5ss4th+XrSM6y
wKgWEC8UmcV9Y7zDV/towZjhCipIh1yJPu3493IVHB/1UDPoNDfOGpK6NuhIEZHy
1sNY8F2j3BBnLw6Fc2uC1FxM3a9MQ9CgJWQ0y9src73VNgQ8miz1WH2rsFp5DwNu
HdZGBXGElmhbJbNFSsRqC1j+K0Y2LzL5BVOrBblkJNpUmxufRx0LIdXE7p4tPazq
8dVOH/Ktx+mDQFbtyA8vXK+Cyyp0c/snR3BZo3AWLfrlip6iwZPG6arN4Wu6P4Nl
ZFWUlHKaMJS/lvsdAuCdZ/lawRvENTOEQMORJR8U7CX/7gDLV1KiaFRpB3fFDUW5
xm5r2qsbVzElu6skk4xk
=eOKJ
-----END PGP SIGNATURE-----
Merge tag 'upstream-4.9-rc3' of git://git.infradead.org/linux-ubifs
Pull ubi/ubifs fixes from Richard Weinberger:
"This contains fixes for issues in both UBI and UBIFS:
- A regression wrt overlayfs, introduced in -rc2.
- An UBI issue, found by Dan Carpenter's static checker"
* tag 'upstream-4.9-rc3' of git://git.infradead.org/linux-ubifs:
ubifs: Fix regression in ubifs_readdir()
ubi: fastmap: Fix add_vol() return value test in ubi_attach_fastmap()
Here are two small driver core / kernfs fixes for 4.9-rc3. One makes
the Kconfig entry for DEBUG_TEST_DRIVER_REMOVE a bit more explicit that
this is a crazy thing to enable for a distro kernel (thanks for trying
Fedora!), the other resolves an issue with vim opening kernfs files
(sysfs, configfs, etc.).
Both have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iFYEABECABYFAlgU0CMPHGdyZWdAa3JvYWguY29tAAoJEDFH1A3bLfspgv4AoJhR
YJeG57ReBKjlzAj497Z1X7QcAJ9GXcbbbxmwj2IcUln5I3uEyuPCkQ==
=pS6k
-----END PGP SIGNATURE-----
Merge tag 'driver-core-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are two small driver core / kernfs fixes for 4.9-rc3.
One makes the Kconfig entry for DEBUG_TEST_DRIVER_REMOVE a bit more
explicit that this is a crazy thing to enable for a distro kernel
(thanks for trying Fedora!), the other resolves an issue with vim
opening kernfs files (sysfs, configfs, etc.)
Both have been in linux-next with no reported issues"
* tag 'driver-core-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
driver core: Make Kconfig text for DEBUG_TEST_DRIVER_REMOVE stronger
kernfs: Add noop_fsync to supported kernfs_file_fops
Pull btrfs fixes from Chris Mason:
"My patch fixes the btrfs list_head abuse that we tracked down during
Dave Jones' memory corruption investigation. With both Jens and my
patches in place, I'm no longer able to trigger problems.
Filipe is fixing a difficult old bug between snapshots, balance and
send. Dave is cooking a few more for the next rc, but these are tested
and ready"
* 'for-linus-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: fix races on root_log_ctx lists
btrfs: fix incremental send failure caused by balance
Commit c83ed4c9db ("ubifs: Abort readdir upon error") broke
overlayfs support because the fix exposed an internal error
code to VFS.
Reported-by: Peter Rosin <peda@axentia.se>
Tested-by: Peter Rosin <peda@axentia.se>
Reported-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
Tested-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
Fixes: c83ed4c9db ("ubifs: Abort readdir upon error")
Cc: stable@vger.kernel.org
Signed-off-by: Richard Weinberger <richard@nod.at>
Merge misc fixes from Andrew Morton:
"20 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
drivers/misc/sgi-gru/grumain.c: remove bogus 0x prefix from printk
cris/arch-v32: cryptocop: print a hex number after a 0x prefix
ipack: print a hex number after a 0x prefix
block: DAC960: print a hex number after a 0x prefix
fs: exofs: print a hex number after a 0x prefix
lib/genalloc.c: start search from start of chunk
mm: memcontrol: do not recurse in direct reclaim
CREDITS: update credit information for Martin Kepplinger
proc: fix NULL dereference when reading /proc/<pid>/auxv
mm: kmemleak: ensure that the task stack is not freed during scanning
lib/stackdepot.c: bump stackdepot capacity from 16MB to 128MB
latent_entropy: raise CONFIG_FRAME_WARN by default
kconfig.h: remove config_enabled() macro
ipc: account for kmem usage on mqueue and msg
mm/slab: improve performance of gathering slabinfo stats
mm: page_alloc: use KERN_CONT where appropriate
mm/list_lru.c: avoid error-path NULL pointer deref
h8300: fix syscall restarting
kcov: properly check if we are in an interrupt
mm/slab: fix kmemcg cache creation delayed issue
It makes the message hard to interpret correctly if a base 10 number is
prefixed by 0x. So change to a hex number.
Link: http://lkml.kernel.org/r/20161026125658.25728-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Boaz Harrosh <ooo@electrozaur.com>
Cc: Benny Halevy <bhalevy@primarydata.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Reading auxv of any kernel thread results in NULL pointer dereferencing
in auxv_read() where mm can be NULL. Fix that by checking for NULL mm
and bailing out early. This is also the original behavior changed by
recent commit c531716785 ("proc: switch auxv to use of __mem_open()").
# cat /proc/2/auxv
Unable to handle kernel NULL pointer dereference at virtual address 000000a8
Internal error: Oops: 17 [#1] PREEMPT SMP ARM
CPU: 3 PID: 113 Comm: cat Not tainted 4.9.0-rc1-ARCH+ #1
Hardware name: BCM2709
task: ea3b0b00 task.stack: e99b2000
PC is at auxv_read+0x24/0x4c
LR is at do_readv_writev+0x2fc/0x37c
Process cat (pid: 113, stack limit = 0xe99b2210)
Call chain:
auxv_read
do_readv_writev
vfs_readv
default_file_splice_read
splice_direct_to_actor
do_splice_direct
do_sendfile
SyS_sendfile64
ret_fast_syscall
Fixes: c531716785 ("proc: switch auxv to use of __mem_open()")
Link: http://lkml.kernel.org/r/1476966200-14457-1-git-send-email-chianglungyu@gmail.com
Signed-off-by: Leon Yu <chianglungyu@gmail.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Mateusz Guzik <mguzik@redhat.com>
Cc: Janis Danisevskis <jdanis@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
use d_fsdata instead of d_time
Miklos Szeredi <mszeredi@redhat.com>
use file_inode(file) instead of file->f_path.dentry->d_inode
Amir Goldstein <amir73il@gmail.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=b9Ly
-----END PGP SIGNATURE-----
Merge tag 'for-linus-4.9-rc2-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull oreangefs updates from Mike Marshall:
"A couple of orangefs cleanups sent in by other developers:
- use d_fsdata instead of d_time (Miklos Szeredi)
- use file_inode(file) instead of file->f_path.dentry->d_inode (Amir
Goldstein)"
* tag 'for-linus-4.9-rc2-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
orangefs: don't use d_time
orangefs: user file_inode() where it is due
Changes in this update:
o iomap page offset masking fix for page faults
o add IOMAP_REPORT to distinguish between read and fiemap map requests
o cleanups to new shared data extent code
o fix mount active status on failed log recovery
o fix broken dquots in a buffer calculation
o fix locking order issues and merge xfs_reflink_remap_range and
xfs_file_share_range
o rework unmapping of CoW extents and remove now unused functions
o clean state when CoW is done.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=LDDu
-----END PGP SIGNATURE-----
Merge tag 'xfs-fixes-for-linus-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
Pull xfs fixes from Dave Chinner:
"This update contains fixes for most of the outstanding regressions
introduced with the 4.9-rc1 XFS merge. There is also a fix for an
iomap bug, too.
This is a quite a bit larger than I'd prefer for a -rc3, but most of
the change comes from cleaning up the new reflink copy on write code;
it's much simpler and easier to understand now. These changes fixed
several bugs in the new code, and it wasn't clear that there was an
easier/simpler way to fix them. The rest of the fixes are the usual
size you'd expect at this stage.
I've left the commits to soak in linux-next for a some extra time
because of the size before asking you to pull, no new problems with
them have been reported so I think it's all OK.
Summary:
- iomap page offset masking fix for page faults
- add IOMAP_REPORT to distinguish between read and fiemap map
requests
- cleanups to new shared data extent code
- fix mount active status on failed log recovery
- fix broken dquots in a buffer calculation
- fix locking order issues and merge xfs_reflink_remap_range and
xfs_file_share_range
- rework unmapping of CoW extents and remove now unused functions
- clean state when CoW is done"
* tag 'xfs-fixes-for-linus-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (25 commits)
xfs: clear cowblocks tag when cow fork is emptied
xfs: fix up inode cowblocks tracking tracepoints
fs: Do to trim high file position bits in iomap_page_mkwrite_actor
xfs: remove xfs_bunmapi_cow
xfs: optimize xfs_reflink_end_cow
xfs: optimize xfs_reflink_cancel_cow_blocks
xfs: refactor xfs_bunmapi_cow
xfs: optimize writes to reflink files
xfs: don't bother looking at the refcount tree for reads
xfs: handle "raw" delayed extents xfs_reflink_trim_around_shared
xfs: add xfs_trim_extent
iomap: add IOMAP_REPORT
xfs: merge xfs_reflink_remap_range and xfs_file_share_range
xfs: remove xfs_file_wait_for_io
xfs: move inode locking from xfs_reflink_remap_range to xfs_file_share_range
xfs: fix the same_inode check in xfs_file_share_range
xfs: remove the same fs check from xfs_file_share_range
libxfs: v3 inodes are only valid on crc-enabled filesystems
libxfs: clean up _calc_dquots_per_chunk
xfs: unset MS_ACTIVE if mount fails
...
btrfs_remove_all_log_ctxs takes a shortcut where it avoids walking the
list because it knows all of the waiters are patiently waiting for the
commit to finish.
But, there's a small race where btrfs_sync_log can remove itself from
the list if it finds a log commit is already done. Also, it uses
list_del_init() to remove itself from the list, but there's no way to
know if btrfs_remove_all_log_ctxs has already run, so we don't know for
sure if it is safe to call list_del_init().
This gets rid of all the shortcuts for btrfs_remove_all_log_ctxs(), and
just calls it with the proper locking.
This is part two of the corruption fixed by cbd60aa7cd. I should have
done this in the first place, but convinced myself the optimizations were
safe. A 12 hour run of dbench 2048 will eventually trigger a list debug
WARN_ON for the list_del_init() in btrfs_sync_log().
Fixes: d1433debe7
Reported-by: Dave Jones <davej@codemonkey.org.uk>
cc: stable@vger.kernel.org # 3.15+
Signed-off-by: Chris Mason <clm@fb.com>
If you edit a kernfs backed file with vi(1), you see an ugly error
message when you write the file because vi tries to fsync(2) the
file after writing, which fails.
We have noop_fsync() for this, use it.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Now that Lorenzo cleaned things up and made the FOLL_FORCE users
explicit, it becomes obvious how some of them don't really need
FOLL_FORCE at all.
So remove FOLL_FORCE from the proc code that reads the command line and
arguments from user space.
The mem_rw() function actually does want FOLL_FORCE, because gdd (and
possibly many other debuggers) use it as a much more convenient version
of PTRACE_PEEKDATA, but we should consider making the FOLL_FORCE part
conditional on actually being a ptracer. This does not actually do
that, just moves adds a comment to that effect and moves the gup_flags
settings next to each other.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bruce was hitting some lockdep warnings in testing, showing that we
could hit a deadlock with the new CB_NOTIFY_LOCK handling, involving a
rather complex situation involving four different spinlocks.
The crux of the matter is that we end up taking the nn->client_lock in
the lm_notify handler. The simplest fix is to just declare a new
per-nfsd_net spinlock to protect the new CB_NOTIFY_LOCK structures.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Instead use d_fsdata which is the same size. Hoping to get rid of d_time,
which is used by very few filesystems by this time.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Replace wrong use of file->f_path.dentry->d_inode with file_inode(file).
In case orangefs ever finds itself as an overelayfs layer, it would want
to get its own inode and not overlayfs's inode.
DISCLAIMER: I did not test this patch because I do not know how to setup
an orangefs mount
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
A bugfix introduced a harmless gcc warning in nfs4_slot_seqid_in_use
if we enable -Wmaybe-uninitialized again:
fs/nfs/nfs4session.c:203:54: error: 'cur_seq' may be used uninitialized in this function [-Werror=maybe-uninitialized]
gcc is not smart enough to conclude that the IS_ERR/PTR_ERR pair
results in a nonzero return value here. Using PTR_ERR_OR_ZERO()
instead makes this clear to the compiler.
The warning originally did not appear in v4.8 as it was globally
disabled, but the bugfix that introduced the warning got backported
to stable kernels which again enable it, and this is now the only
warning in the v4.7 builds.
Fixes: e09c978aae ("NFSv4.1: Fix Oopsable condition in server callback races")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This issue was found when testing in-band dedupe enospc behaviour,
sometimes run_one_delayed_ref() may fail for enospc reason, then
__btrfs_run_delayed_refs（）will return, but forget to add num_heads_read
back, which will trigger "WARN_ON(delayed_refs->num_heads_ready == 0)" in
btrfs_select_ref_head().
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We cast 0 to a u8 but then because of type promotion, it's immediately
cast to int back to int before we do a bitwise negate. The cast doesn't
matter in this case, the code works as intended. It causes a static
checker warning though so let's remove it.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
In btrfs_truncate_inode_items()->btrfs_async_run_delayed_refs(), we
swap the arg2 and arg3 wrongly, fix this.
This bug just impacts asynchronous delayed refs handle when we truncate inodes.
In delayed_ref_async_start(), there is such codes:
trans = btrfs_join_transaction(async->root);
if (trans->transid > async->transid)
goto end;
ret = btrfs_run_delayed_refs(trans, async->root, async->count);
From this codes, we can see that this just influence whether can we handle
delayed refs or the number of delayed refs to handle, this may impact
performance, but will not result in missing delayed refs, all delayed refs will
be handled in btrfs_commit_transaction().
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Indeed this just make the behavior similar to xfs when process has
fatal signals pending, and it'll make fstests/generic/298 happy.
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While free'ing qgroup->reserved resources, we much check if
the page has not been invalidated by a truncate operation
by checking if the page is still dirty before reducing the
qgroup resources. Resources in such a case are free'd when
the entire extent is released by delayed_ref.
This fixes a double accounting while releasing resources
in case of truncating a file, reproduced by the following testcase.
SCRATCH_DEV=/dev/vdb
SCRATCH_MNT=/mnt
mkfs.btrfs -f $SCRATCH_DEV
mount -t btrfs $SCRATCH_DEV $SCRATCH_MNT
cd $SCRATCH_MNT
btrfs quota enable $SCRATCH_MNT
btrfs subvolume create a
btrfs qgroup limit 500m a $SCRATCH_MNT
sync
for c in {1..15}; do
dd if=/dev/zero bs=1M count=40 of=$SCRATCH_MNT/a/file;
done
sleep 10
sync
sleep 5
touch $SCRATCH_MNT/a/newfile
echo "Removing file"
rm $SCRATCH_MNT/a/file
Fixes: b9d0b38928 ("btrfs: Add handler for invalidate page")
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
A NFSv4 mount of a subdirectory will show an extra slash (as in
'server://path') in proc's mountinfo which will not match the device name
and path. This can cause problems for programs searching for the mount.
Fix this by checking for a leading slash in the dentry path, if so trim
away any trailing slashes in the device name.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
If the deferred ops transaction roll fails, we need to abort the intent
items if we haven't already logged a done item for it, regardless of
whether or not the deferred ops has had a transaction committed. Dave
found this while running generic/388.
Move the tracepoint to make it easier to track object lifetimes.
Reported-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
The background cowblocks scan job takes care of scanning for inodes with
potentially lingering blocks in the cow fork and clearing them out. If
the background scanner reclaims the cow fork blocks, however, it doesn't
immediately clear the cowblocks tag from the inode. Instead, the inode
remains tagged until the background scanner comes around again,
discovers the inode cow fork has no blocks, clears the tag and fires the
trace_xfs_inode_free_cowblocks_invalid() tracepoint to indicate that the
inode may have been incorrectly tagged.
This is not a major functional problem as the tag is ultimately cleared.
Nonetheless, clear the tag when an inode cow fork is explicitly emptied
to avoid the extra round trip through the background scanner and
spurious "invalid" tracepoint.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
These calls are still using the eofblocks tracepoints. The cowblocks
equivalents are already defined, we just aren't actually calling them.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
iomap_page_mkwrite_actor() calls __block_write_begin_int() with position
masked as pos & ~PAGE_MASK which is equivalent to pos & (PAGE_SIZE-1).
Thus it masks off high bits of file position. However
__block_write_begin_int() expects full file position on input. This does
not cause any visible issues because all __block_write_begin_int()
really cares about are low file position bits but still it is a bug
waiting to happen.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
- Fallout from the merge window, refactoring UBI code introduced some issues.
- Fixes for an UBIFS readdir bug which can cause getdents() to busy loop
for ever and a bug in the UBIFS xattr code.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=Gjo0
-----END PGP SIGNATURE-----
Merge tag 'upstream-4.9-rc2' of git://git.infradead.org/linux-ubifs
Pull UBI[FS] fixes from Richard Weinberger:
"This contains fixes for issues in both UBI and UBIFS:
- Fallout from the merge window, refactoring UBI code introduced some
issues.
- Fixes for an UBIFS readdir bug which can cause getdents() to busy
loop for ever and a bug in the UBIFS xattr code"
* tag 'upstream-4.9-rc2' of git://git.infradead.org/linux-ubifs:
ubifs: Abort readdir upon error
UBI: Fix crash in try_recover_peb()
ubi: fix swapped arguments to call to ubi_alloc_aeb
ubifs: Fix xattr_names length in exit paths
ubifs: Rename ubifs_rename2
-----BEGIN PGP SIGNATURE-----
iQEcBAABCAAGBQJYDK6KAAoJEPL5WVaVDYGjhZ0H/2aLu4BQOmIPJZBBS+I2FurE
7FFdnQ8r1gBPWktvfUTn6MzTE4VKe0b1js5EiRCiCJhJq9UadBu53dUWTgfZ5Egi
Sc6p0NGqDRgixLXbFRt8wP7iPtVg0tlysE0EJ6ae4VA1wUpf5aoHaPqgO9V0hirW
9pUJq8kzBGs628CROcYtQ5IL5AfouM1q/fzazw4Voz48LTgvhnDGCkqQmNsKkRo+
bN5tkjSTQUdW3OrRVsNwNND/iDYpTa6PcX1XXQiFFhQ4SbZoNS/dzowz09QreGxA
Uz/rt2hMnv552Zd52d5q6N/jPWg+O+x0b4PcYtn7NDjPn/1KZUyX0pQK/EoevXQ=
=2Kri
-----END PGP SIGNATURE-----
Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"A few bug fixes and add some missing KERN_CONT annotations"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: add missing KERN_CONT to a few more debugging uses
fscrypto: lock inode while setting encryption policy
ext4: correct endianness conversion in __xattr_check_inode()
fscrypto: make XTS tweak initialization endian-independent
ext4: do not advertise encryption support when disabled
jbd2: fix incorrect unlock on j_list_lock
ext4: super.c: Update logging style using KERN_CONT
Pull vmap stack fixes from Ingo Molnar:
"This is fallout from CONFIG_HAVE_ARCH_VMAP_STACK=y on x86: stack
accesses that used to be just somewhat questionable are now totally
buggy.
These changes try to do it without breaking the ABI: the fields are
left there, they are just reporting zero, or reporting narrower
information (the maps file change)"
* 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
mm: Change vm_is_stack_for_task() to vm_is_stack_for_current()
fs/proc: Stop trying to report thread stacks
fs/proc: Stop reporting eip and esp in /proc/PID/stat
mm/numa: Remove duplicated include from mprotect.c
Nikolay's error path patch is tagged for stable, everything else but
readdir vs frags race was introduced in 4.9-rc1.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQEcBAABCAAGBQJYCPFwAAoJEEp/3jgCEfOLQxkH/3t7m/NaC0S+1eISHQWne0rs
GtI4wx6Yh5KUV0SKgzYTYs0AEusW459XvUzwLwe/Tp9Qdp/KehviGJdQY8WBP6Es
J5u7WLU+Ja1GwB586YUzhG7L3PAi8DXxbkTB+MYB4circhZ0w8ecuJUL4o++5VuH
yAfoKn6tFyCTpvhFGd9dBPn3tVl90/vpwiH/hHp04PWHq6dNvLyJuIbvUD4JaV3O
NYQqq3fFG76jqwyu2dE0DN4IPNb3tUjJ1oY86Uvkq7DP4ZiI61JNx45XTW1XIplx
lWi2f2MurwznAJZl9kaU0TiTdS7liizkRdb2cu56nMRmzVSDz+va5X3CdDSpQtg=
=JwMW
-----END PGP SIGNATURE-----
Merge tag 'ceph-for-4.9-rc2' of git://github.com/ceph/ceph-client
Pull Ceph fixes from Ilya Dryomov:
"An rbd exclusive-lock edge case fix and several filesystem fixups.
Nikolay's error path patch is tagged for stable, everything else but
readdir vs frags race was introduced in this merge window"
* tag 'ceph-for-4.9-rc2' of git://github.com/ceph/ceph-client:
ceph: fix non static symbol warning
ceph: fix uninitialized dentry pointer in ceph_real_mount()
ceph: fix readdir vs fragmentation race
ceph: fix error handling in ceph_read_iter
rbd: don't retry watch reregistration if header object is gone
rbd: don't wait for the lock forever if blacklisted
Pull misc filesystem fixes from Jan Kara:
"A fix for an isofs change apparently breaking mount(8) in some cases
and one ext2 warning fix"
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: avoid bogus -Wmaybe-uninitialized warning
isofs: Do not return EACCES for unknown filesystems
This reverts more of:
b76437579d ("procfs: mark thread stack correctly in proc/<pid>/maps")
... which was partially reverted by:
65376df582 ("proc: revert /proc/<pid>/maps [stack:TID] annotation")
Originally, /proc/PID/task/TID/maps was the same as /proc/TID/maps.
In current kernels, /proc/PID/maps (or /proc/TID/maps even for
threads) shows "[stack]" for VMAs in the mm's stack address range.
In contrast, /proc/PID/task/TID/maps uses KSTK_ESP to guess the
target thread's stack's VMA. This is racy, probably returns garbage
and, on arches with CONFIG_TASK_INFO_IN_THREAD=y, is also crash-prone:
KSTK_ESP is not safe to use on tasks that aren't known to be running
ordinary process-context kernel code.
This patch removes the difference and just shows "[stack]" for VMAs
in the mm's stack range. This is IMO much more sensible -- the
actual "stack" address really is treated specially by the VM code,
and the current thread stack isn't even well-defined for programs
that frequently switch stacks on their own.
Reported-by: Jann Horn <jann@thejh.net>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux API <linux-api@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tycho Andersen <tycho.andersen@canonical.com>
Link: http://lkml.kernel.org/r/3e678474ec14e0a0ec34c611016753eea2e1b8ba.1475257877.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reporting these fields on a non-current task is dangerous. If the
task is in any state other than normal kernel code, they may contain
garbage or even kernel addresses on some architectures. (x86_64
used to do this. I bet lots of architectures still do.) With
CONFIG_THREAD_INFO_IN_TASK=y, it can OOPS, too.
As far as I know, there are no use programs that make any material
use of these fields, so just get rid of them.
Reported-by: Jann Horn <jann@thejh.net>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux API <linux-api@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Tycho Andersen <tycho.andersen@canonical.com>
Link: http://lkml.kernel.org/r/a5fed4c3f4e33ed25d4bb03567e329bc5a712bcc.1475257877.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Since no one uses it anymore.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Instead of doing a full extent list search for each extent that is
to be deleted using xfs_bmapi_read and then doing another one inside
of xfs_bunmapi_cow use the same scheme that xfs_bumapi uses: look
up the last extent to be deleted and then use the extent index to
walk downward until we are outside the range to be deleted.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Rewrite xfs_reflink_cancel_cow_blocks so that we only do a search for
the first extent in the extent list and then iterate over the remaining
extents using the extent index, passing the extent we operate on
directly to xfs_bmap_del_extent_delay or xfs_bmap_del_extent_cow instead
of going through xfs_bunmapi and doing yet another extent list lookup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Split out two helpers for deleting delayed or real extents from the COW fork.
This allows to call them directly from xfs_reflink_cow_end_io once that
function is refactored to iterate the extent tree. It will also allow
to reuse the delalloc deletion from xfs_bunmapi in the future.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Instead of reserving space as the first thing in write_begin move it past
reading the extent in the data fork. That way we only have to read from
the data fork once and can reuse that information for trimming the extent
to the shared/unshared boundary. Additionally this allows to easily
limit the actual write size to said boundary, and avoid a roundtrip on the
ilock.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
There is no need to trim an extent into a shared or non-shared one, or
report any flags for plain old reads.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Delalloc extents in the extent list contain the number of reserved
indirect blocks in their startblock value and don't use the magic
DELAYSTARTBLOCK constant. Ensure that xfs_reflink_trim_around_shared
handles them properly by checking for isnullstartblock().
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
