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J. Bruce Fields aa387d6ce1 nfsd: fix EXDEV checking in rename 
We again check for the EXDEV a little later on, so the first check is
redundant.  This check is also slightly racier, since a badly timed
eviction from the export cache could leave us with the two fh_export
pointers pointing to two different cache entries which each refer to the
same underlying export.

It's better to compare vfsmounts as the later check does, but that
leaves a minor security hole in the case where the two exports refer to
two different directories especially if (for example) they have
different root-squashing options.

So, compare ex_path.dentry too.

Reported-by: Joe Habermann <joe.habermann@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-04-26 16:18:15 -04:00
..
9p
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
adfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
affs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
afs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
autofs4
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
befs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
bfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
btrfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2013-03-17 11:04:14 -07:00
cachefiles
FS-Cache: Mark cancellation of in-progress operation
2012-12-20 22:34:00 +00:00
ceph
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
cifs
fs: Limit sys_mount to only request filesystem modules. (Part 3)
2013-03-11 07:09:48 -07:00
coda
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
configfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
cramfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
debugfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
devpts
fs: Limit sys_mount to only request filesystem modules (Part 2).
2013-03-07 01:08:55 -08:00
dlm
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
ecryptfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-03-09 16:51:13 -08:00
efs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
exofs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
exportfs
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
ext2
ext2: Fix BUG_ON in evict() on inode deletion
2013-03-13 15:23:44 +01:00
ext3
ext3: Fix format string issues
2013-03-11 22:05:56 +01:00
ext4
fs: Readd the fs module aliases.
2013-03-12 18:55:21 -07:00
f2fs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
fat
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
freevxfs
fs: Readd the fs module aliases.
2013-03-12 18:55:21 -07:00
fscache
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
fuse
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
gfs2
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
hfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
hfsplus
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
hostfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-03-13 15:47:50 -07:00
hpfs
fs: Limit sys_mount to only request filesystem modules. (Part 3)
2013-03-11 07:09:48 -07:00
hppfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
hugetlbfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
isofs
fs: Readd the fs module aliases.
2013-03-12 18:55:21 -07:00
jbd
jbd: don't wake kjournald unnecessarily
2013-01-14 22:50:45 +01:00
jbd2
jbd2: fix ERR_PTR dereference in jbd2__journal_start
2013-03-02 17:08:46 -05:00
jffs2
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
jfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
lockd
LOCKD: Ensure that nlmclnt_block resets block->b_status after a server reboot
2013-04-21 18:08:42 -04:00
logfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
minix
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
ncpfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
nfs
Merge Trond's nfs-for-next
2013-04-26 11:37:43 -04:00
nfs_common
nfs_common: Update the translation between nfsv3 acls linux posix acls
2013-02-13 06:15:14 -08:00
nfsd
nfsd: fix EXDEV checking in rename
2013-04-26 16:18:15 -04:00
nilfs2
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
nls
…
notify
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
ntfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
ocfs2
fs: Limit sys_mount to only request filesystem modules (Part 2).
2013-03-07 01:08:55 -08:00
omfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
openpromfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
proc
proc: Use nd_jump_link in proc_ns_follow_link
2013-03-09 00:14:45 -08:00
pstore
A few fixes to reduce places where pstore might hang
2013-02-21 09:38:18 -08:00
qnx4
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
qnx6
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
quota
quota: add missing use of dq_data_lock in __dquot_initialize
2013-03-11 22:05:56 +01:00
ramfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
reiserfs
reiserfs: Use kstrdup instead of kmalloc/strcpy
2013-03-11 22:05:57 +01:00
romfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
squashfs
fs: Limit sys_mount to only request filesystem modules. (Part 3)
2013-03-11 07:09:48 -07:00
sysfs
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
sysv
fs: Readd the fs module aliases.
2013-03-12 18:55:21 -07:00
ubifs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
udf
fs: Limit sys_mount to only request filesystem modules. (Part 3)
2013-03-11 07:09:48 -07:00
ufs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
xfs
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
aio.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
anon_inodes.c
get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
2013-02-26 02:46:11 -05:00
attr.c
userns: Allow chown and setgid preservation
2012-11-20 04:17:24 -08:00
bad_inode.c
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
binfmt_aout.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
binfmt_elf_fdpic.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
binfmt_elf.c
ImgTec Meta architecture changes for v3.9-rc1
2013-03-03 12:06:09 -08:00
binfmt_em86.c
exec: use -ELOOP for max recursion depth
2012-12-17 17:15:23 -08:00
binfmt_flat.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
binfmt_misc.c
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
binfmt_script.c
exec: do not leave bprm->interp on stack
2012-12-20 17:40:19 -08:00
binfmt_som.c
get rid of pt_regs argument of ->load_binary()
2012-11-28 21:53:38 -05:00
bio-integrity.c
…
bio.c
block: add missing block_bio_complete() tracepoint
2013-01-14 15:00:36 +01:00
block_dev.c
Merge branch 'for-3.9/core' of git://git.kernel.dk/linux-block
2013-02-28 12:52:24 -08:00
buffer.c
Merge branch 'for-3.9/core' of git://git.kernel.dk/linux-block
2013-02-28 12:52:24 -08:00
char_dev.c
char_dev: pin parent kobject
2012-10-22 08:50:37 +03:00
compat_binfmt_elf.c
…
compat_ioctl.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
compat.c
Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys
2013-03-12 11:05:45 -07:00
coredump.c
coredump: remove redundant defines for dumpable states
2013-02-27 19:10:11 -08:00
coredump.h
…
dcache.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
dcookies.c
…
direct-io.c
fs: Fix possible use-after-free with AIO
2013-02-22 23:31:36 -05:00
drop_caches.c
…
eventfd.c
fs, eventfd: add procfs fdinfo helper
2012-12-17 17:15:27 -08:00
eventpoll.c
epoll: prevent missed events on EPOLL_CTL_MOD
2013-01-02 09:16:43 -08:00
exec.c
coredump: remove redundant defines for dumpable states
2013-02-27 19:10:11 -08:00
fcntl.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
fhandle.c
Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux
2012-12-20 14:04:11 -08:00
fifo.c
…
file_table.c
cache the value of file_inode() in struct file
2013-03-01 19:48:30 -05:00
file.c
locking: Various static lock initializer fixes
2013-02-19 08:42:45 +01:00
filesystems.c
fs: Limit sys_mount to only request filesystem modules.
2013-03-03 19:36:31 -08:00
fs_struct.c
constify path_get/path_put and fs_struct.c stuff
2013-03-01 23:51:07 -05:00
fs-writeback.c
2 writeback fixes
2013-02-28 13:21:44 -08:00
generic_acl.c
…
inode.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
internal.h
constify path_get/path_put and fs_struct.c stuff
2013-03-01 23:51:07 -05:00
ioctl.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
ioprio.c
…
Kconfig
fuse: Move CUSE Kconfig entry from fs/Kconfig into fs/fuse/Kconfig
2013-01-17 13:08:45 +01:00
Kconfig.binfmt
…
libfs.c
vfs: drop vmtruncate
2012-12-20 18:46:29 -05:00
locks.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
Makefile
f2fs: update Kconfig and Makefile
2012-12-11 13:43:42 +09:00
mbcache.c
…
mount.h
proc: Usable inode numbers for the namespace file descriptors.
2012-11-20 04:19:49 -08:00
mpage.c
…
namei.c
vfs: don't BUG_ON() if following a /proc fd pseudo-symlink results in a symlink
2013-03-08 09:03:07 -08:00
namespace.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
no-block.c
…
open.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-03-03 13:23:03 -08:00
pipe.c
vfs: fix pipe counter breakage
2013-03-12 08:29:17 -07:00
pnode.c
…
pnode.h
vfs: Only support slave subtrees across different user namespaces
2012-11-19 05:59:20 -08:00
posix_acl.c
…
proc_namespace.c
…
read_write.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2013-03-02 08:34:06 -08:00
read_write.h
…
readdir.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
select.c
sched/rt: Move rt specific bits into new header file
2013-02-07 20:51:08 +01:00
seq_file.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-03-03 13:23:03 -08:00
signalfd.c
fs, epoll: add procfs fdinfo helper
2012-12-17 17:15:27 -08:00
splice.c
export kernel_write(), convert open-coded instances
2013-02-26 02:46:11 -05:00
stack.c
…
stat.c
switch vfs_getattr() to struct path
2013-02-26 02:46:08 -05:00
statfs.c
vfs: fix user_statfs to retry once on ESTALE errors
2012-12-20 18:50:07 -05:00
super.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
sync.c
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
timerfd.c
compat: restore timerfd settime and gettime compat syscalls
2013-03-02 09:35:13 -05:00
utimes.c
vfs: allow utimensat() calls to retry once on an ESTALE error
2012-12-20 18:50:08 -05:00
xattr_acl.c
userns: Fix posix_acl_file_xattr_userns gid conversion
2012-10-12 13:16:48 -07:00
xattr.c
vfs: make lremovexattr retry once on ESTALE error
2012-12-20 18:50:11 -05:00