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Jeff Layton 5bccda0ebc cifs: fix dentry refcount leak when opening a FIFO on lookup 
The cifs code will attempt to open files on lookup under certain
circumstances. What happens though if we find that the file we opened
was actually a FIFO or other special file?

Currently, the open filehandle just ends up being leaked leading to
a dentry refcount mismatch and oops on umount. Fix this by having the
code close the filehandle on the server if it turns out not to be a
regular file. While we're at it, change this spaghetti if statement
into a switch too.

Cc: stable@vger.kernel.org
Reported-by: CAI Qian <caiqian@redhat.com>
Tested-by: CAI Qian <caiqian@redhat.com>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-02-26 23:16:26 -06:00
..
9p
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
2012-01-10 15:09:01 -08:00
adfs
vfs: switch ->show_options() to struct dentry *
2012-01-06 23:19:54 -05:00
affs
affs: propagate umode_t
2012-01-03 22:55:04 -05:00
afs
switch ->create() to umode_t
2012-01-03 22:54:53 -05:00
autofs4
autofs: work around unhappy compat problem on x86-64
2012-02-25 12:10:27 -08:00
befs
vfs: fix the stupidity with i_dentry in inode destructors
2012-01-03 22:52:40 -05:00
bfs
switch ->create() to umode_t
2012-01-03 22:54:53 -05:00
btrfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2012-02-24 09:02:53 -08:00
cachefiles
fs: move code out of buffer.c
2012-01-03 22:54:07 -05:00
ceph
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2012-02-02 15:47:33 -08:00
cifs
cifs: fix dentry refcount leak when opening a FIFO on lookup
2012-02-26 23:16:26 -06:00
coda
coda: switch coda_cnode_make() to sane API as well, clean coda_lookup()
2012-01-10 11:13:16 -05:00
configfs
configfs: convert to umode_t
2012-01-03 22:54:57 -05:00
cramfs
Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z
2012-01-06 23:15:54 -05:00
debugfs
kernel-doc: fix new warnings in debugfs
2012-01-24 10:47:41 -08:00
devpts
devpts: fix double-free on mount failure
2012-01-08 20:19:03 -05:00
dlm
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
2012-01-10 14:55:55 -08:00
ecryptfs
ecryptfs: remove the second argument of k[un]map_atomic()
2012-02-16 16:06:27 -06:00
efs
vfs: fix the stupidity with i_dentry in inode destructors
2012-01-03 22:52:40 -05:00
exofs
Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd
2012-01-09 12:51:01 -08:00
exportfs
…
ext2
ext2: protect inode changes in the SETVERSION and SETFLAGS ioctls
2012-01-11 13:39:02 +01:00
ext3
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2012-01-09 12:51:21 -08:00
ext4
Merge branch 'for_linus' into for_linus_merged
2012-01-10 11:54:07 -05:00
fat
Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
2012-01-09 12:09:47 -08:00
freevxfs
fs: propagate umode_t, misc bits
2012-01-03 22:55:10 -05:00
fscache
FS-Cache: Fix __fscache_uncache_all_inode_pages()'s outer loop
2011-07-21 10:59:16 -07:00
fuse
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
2012-01-12 12:39:21 -08:00
gfs2
GFS2: Fix nlink setting on inode creation
2012-01-11 12:35:05 +00:00
hfs
vfs: switch ->show_options() to struct dentry *
2012-01-06 23:19:54 -05:00
hfsplus
hfsplus: creation of hidden dir on mount can fail
2012-01-10 17:48:52 -05:00
hostfs
vfs: switch ->show_options() to struct dentry *
2012-01-06 23:19:54 -05:00
hpfs
switch ->mknod() to umode_t
2012-01-03 22:54:54 -05:00
hppfs
vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_root
2012-01-03 22:52:41 -05:00
hugetlbfs
mm: compaction: introduce sync-light migration for use by compaction
2012-01-12 20:13:09 -08:00
isofs
isofs: inode leak on mount failure
2012-01-09 10:48:11 -05:00
jbd
jbd: Issue cache flush after checkpointing
2012-01-11 13:36:57 +01:00
jbd2
Merge branch 'for_linus' into for_linus_merged
2012-01-10 11:54:07 -05:00
jffs2
jffs2: do not initialize variable unnecessarily
2012-01-11 09:53:51 +00:00
jfs
Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2012-01-08 13:10:57 -08:00
lockd
module_param: make bool parameters really bool (drivers & misc)
2012-01-13 09:32:20 +10:30
logfs
mtd: fix merge conflict resolution breakage
2012-02-01 11:10:24 -08:00
minix
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
ncpfs
vfs: switch ->show_options() to struct dentry *
2012-01-06 23:19:54 -05:00
nfs
NFSv4: fix server_scope memory leak
2012-02-17 17:34:03 -05:00
nfs_common
Fix common misspellings
2011-03-31 11:26:23 -03:00
nfsd
Merge branch 'for-3.3' of git://linux-nfs.org/~bfields/linux
2012-01-14 12:26:41 -08:00
nilfs2
nilfs2: avoid overflowing segment numbers in nilfs_ioctl_clean_segments()
2012-02-08 19:03:51 -08:00
nls
NLS: raname "maxlen" to "maxout" in UTF conversion routines
2011-11-26 19:58:47 -08:00
notify
fsnotify: don't BUG in fsnotify_destroy_mark()
2012-01-14 18:01:42 -08:00
ntfs
module_param: avoid bool abuse, add bint for special cases.
2012-01-13 09:32:17 +10:30
ocfs2
ocfs2: deal with wraparounds of i_nlink in ocfs2_rename()
2012-02-13 20:45:39 -05:00
omfs
omfs: propagate umode_t
2012-01-03 22:55:01 -05:00
openpromfs
vfs: fix the stupidity with i_dentry in inode destructors
2012-01-03 22:52:40 -05:00
proc
Fix race in process_vm_rw_core
2012-02-02 12:55:17 -08:00
pstore
pstore: gracefully handle NULL pstore_info functions
2011-11-18 13:49:00 -08:00
qnx4
qnx4: don't leak ->BitMap on late failure exits
2012-01-19 13:54:36 -05:00
quota
quota: Fix deadlock with suspend and quotas
2012-02-13 20:45:39 -05:00
ramfs
pohmelfs: propagate umode_t
2012-01-03 22:55:07 -05:00
reiserfs
reiserfs: don't lock root inode searching
2012-01-10 16:30:54 -08:00
romfs
MTD pull for 3.3
2012-01-10 13:45:22 -08:00
squashfs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next
2012-01-13 10:34:57 -08:00
sysfs
sysfs: Complain bitterly about attempts to remove files from nonexistent directories.
2012-01-24 12:12:32 -08:00
sysv
vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb
2012-01-06 23:16:53 -05:00
ubifs
UBIFS: fix non-debug configuration build
2012-01-15 13:46:02 +02:00
udf
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2012-01-09 12:51:21 -08:00
ufs
vfs: switch ->show_options() to struct dentry *
2012-01-06 23:19:54 -05:00
xfs
xfs: make inode quota check more general
2012-02-21 10:12:43 -06:00
aio.c
Unused iocbs in a batch should not be accounted as active.
2012-01-13 20:39:44 -08:00
anon_inodes.c
vfs: dont chain pipe/anon/socket on superblock s_inodes list
2011-07-26 12:57:09 -04:00
attr.c
switch is_sxid() to umode_t
2012-01-03 22:55:11 -05:00
bad_inode.c
switch ->mknod() to umode_t
2012-01-03 22:54:54 -05:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
binfmt_elf.c
fs: binfmt_elf: create Kconfig variable for PIE randomization
2012-01-10 16:30:51 -08:00
binfmt_em86.c
…
binfmt_flat.c
CRED: Fix load_flat_shared_library() to initialise bprm correctly
2011-05-03 10:10:51 +10:00
binfmt_misc.c
vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb
2012-01-06 23:16:53 -05:00
binfmt_script.c
…
binfmt_som.c
…
bio-integrity.c
fs: add export.h to files using EXPORT_SYMBOL/THIS_MODULE macros
2011-10-31 19:30:31 -04:00
bio.c
bio: don't overflow in bio_get_nr_vecs()
2012-02-08 22:07:18 +01:00
block_dev.c
vfs: cache request_queue in struct block_device
2012-01-12 20:13:12 -08:00
buffer.c
fs: move code out of buffer.c
2012-01-03 22:54:07 -05:00
char_dev.c
char_dev.c: fix up some whitespace errors
2011-12-13 11:18:17 -08:00
compat_binfmt_elf.c
…
compat_ioctl.c
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
2012-01-15 12:49:56 -08:00
compat.c
vfs: fix compat_sys_stat() handling of overflows in st_nlink
2012-02-13 20:45:39 -05:00
dcache.c
vfs: fix panic in __d_lookup() with high dentry hashtable counts
2012-02-13 20:45:38 -05:00
dcookies.c
oprofile, dcookies: Fix possible circular locking dependency
2011-05-31 16:33:35 +02:00
direct-io.c
Restore direct_io / truncate locking API
2012-02-23 15:56:21 -08:00
drop_caches.c
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
eventfd.c
…
eventpoll.c
epoll: ep_unregister_pollwait() can use the freed pwq->whead
2012-02-24 11:42:50 -08:00
exec.c
exec: fix use-after-free bug in setup_new_exec()
2012-02-06 15:15:20 -08:00
fcntl.c
…
fhandle.c
vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb
2012-01-06 23:16:53 -05:00
fifo.c
…
file_table.c
vfs: prevent remount read-only if pending removes
2012-01-06 23:20:13 -05:00
file.c
vfs: avoid large kmalloc()s for the fdtable
2011-04-28 11:28:20 -07:00
filesystems.c
vfs: convert fs_supers to hlist
2012-01-03 22:52:39 -05:00
fs_struct.c
…
fs-writeback.c
writeback: fix NULL bdi->dev in trace writeback_single_inode
2012-02-01 16:53:40 +08:00
generic_acl.c
switch posix_acl_equiv_mode() to umode_t *
2011-08-01 02:10:06 -04:00
inode.c
vfs: fix panic in __d_lookup() with high dentry hashtable counts
2012-02-13 20:45:38 -05:00
internal.h
vfs: protect remounting superblock read-only
2012-01-06 23:20:12 -05:00
ioctl.c
vfs: fix up ENOIOCTLCMD error handling
2012-01-05 15:40:12 -08:00
ioprio.c
block: strip out locking optimization in put_io_context()
2012-02-07 07:51:30 +01:00
Kconfig
Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd
2012-01-09 12:51:01 -08:00
Kconfig.binfmt
fs: binfmt_elf: create Kconfig variable for PIE randomization
2012-01-10 16:30:51 -08:00
libfs.c
fs: move code out of buffer.c
2012-01-03 22:54:07 -05:00
locks.c
vfs: fix handling of lock allocation failure in lease-break case
2011-12-26 10:25:26 -08:00
Makefile
Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z
2012-01-06 23:15:54 -05:00
mbcache.c
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
mount.h
vfs: keep list of mounts for each superblock
2012-01-06 23:20:12 -05:00
mpage.c
fs: remove unneeded plug in mpage_readpages()
2012-01-12 09:19:54 +01:00
namei.c
vfs: fix d_inode_lookup() dentry ref leak
2012-02-13 20:45:37 -05:00
namespace.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-01-08 13:21:22 -08:00
no-block.c
…
open.c
switch security_path_chmod() to struct path *
2012-01-06 23:16:53 -05:00
pipe.c
pipe: fail cleanly when root tries F_SETPIPE_SZ with big size
2012-01-12 20:13:04 -08:00
pnode.c
vfs: switch pnode.h macros to struct mount *
2012-01-03 22:57:11 -05:00
pnode.h
vfs: switch pnode.h macros to struct mount *
2012-01-03 22:57:11 -05:00
posix_acl.c
vfs: pass all mask flags check_acl and posix_acl_permission
2011-10-28 14:58:54 +02:00
proc_namespace.c
vfs: switch ->show_options() to struct dentry *
2012-01-06 23:19:54 -05:00
read_write.c
Cross Memory Attach
2011-10-31 17:30:44 -07:00
read_write.h
…
readdir.c
…
select.c
sys_poll: fix incorrect type for 'timeout' parameter
2012-02-21 17:24:20 -08:00
seq_file.c
constify seq_file stuff
2012-01-03 22:52:40 -05:00
signalfd.c
epoll: ep_unregister_pollwait() can use the freed pwq->whead
2012-02-24 11:42:50 -08:00
splice.c
fs: move code out of buffer.c
2012-01-03 22:54:07 -05:00
stack.c
filesystems: add set_nlink()
2011-11-02 12:53:43 +01:00
stat.c
readlinkat: ensure we return ENOENT for the empty pathname for normal lookups
2011-11-02 12:53:42 +01:00
statfs.c
vfs: new helper - vfs_ustat()
2012-01-03 22:53:07 -05:00
super.c
vfs: Provide function to get superblock and wait for it to thaw
2012-02-13 20:45:38 -05:00
sync.c
fs: move code out of buffer.c
2012-01-03 22:54:07 -05:00
timerfd.c
timerfd: Fix wakeup of processes when timer is cancelled on clock change
2011-06-14 11:46:14 +02:00
utimes.c
…
xattr_acl.c
…
xattr.c
vfs: mnt_drop_write_file()
2012-01-03 22:52:40 -05:00