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bb78be8397
linux/fs
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Al Viro 0b2bac2f1e [PATCH] fix SMP ordering hole in fcntl_setlk() 
fcntl_setlk()/close() race prevention has a subtle hole - we need to
make sure that if we *do* have an fcntl/close race on SMP box, the
access to descriptor table and inode->i_flock won't get reordered.

As it is, we get STORE inode->i_flock, LOAD descriptor table entry vs.
STORE descriptor table entry, LOAD inode->i_flock with not a single
lock in common on both sides.  We do have BKL around the first STORE,
but check in locks_remove_posix() is outside of BKL and for a good
reason - we don't want BKL on common path of close(2).

Solution is to hold ->file_lock around fcheck() in there; that orders
us wrt removal from descriptor table that preceded locks_remove_posix()
on close path and we either come first (in which case eviction will be
handled by the close side) or we'll see the effect of close and do
eviction ourselves.  Note that even though it's read-only access,
we do need ->file_lock here - rcu_read_lock() won't be enough to
order the things.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-05-06 13:58:34 -04:00
..
9p [PATCH] restore sane ->umount_begin() API 2008-04-25 09:23:25 -04:00
adfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
affs [PATCH] fix reservation discarding in affs 2008-05-06 13:45:33 -04:00
afs afs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
autofs mount options: fix autofs 2008-02-08 09:22:40 -08:00
autofs4 autofs: path_{get,put}() cleanups 2008-05-01 08:04:01 -07:00
befs befs: fix sparse warning in linuxvfs.c 2008-04-29 08:05:59 -07:00
bfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
cifs proc: remove proc_root_fs 2008-04-29 08:06:18 -07:00
coda codafs: fix build warning 2008-04-29 08:06:04 -07:00
configfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
cramfs fs: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:44 -04:00
debugfs DEBUGFS: Correct location of debugfs API documentation. 2008-04-30 16:52:47 -07:00
devpts devpts: factor out PTY index allocation 2008-04-30 08:29:48 -07:00
dlm fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
ecryptfs Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
efs efs: update error msg to not refer to deleted read_inode() 2008-04-02 15:28:19 -07:00
exportfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
ext2 ext2: retry block allocation if new blocks are allocated from system zone 2008-04-28 08:58:43 -07:00
ext3 ext3: fix test ext_generic_write_end() copied return value 2008-04-29 22:01:27 -04:00
ext4 ext4: fix test ext_generic_write_end() copied return value 2008-04-29 22:01:18 -04:00
fat fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
freevxfs fs/freevxfs/: proper externs 2008-04-29 08:06:00 -07:00
fuse fuse: use clamp() rather than nested min/max 2008-05-01 08:04:02 -07:00
gfs2 fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
hfs hfs: fix warning with 64k PAGE_SIZE 2008-04-30 08:29:52 -07:00
hfsplus hfsplus: fix warning with 64k PAGE_SIZE 2008-04-30 08:29:52 -07:00
hostfs uml: fix hostfs tv_usec calculations 2008-02-05 09:44:30 -08:00
hpfs mount options: fix hpfs 2008-02-08 09:22:40 -08:00
hppfs [PATCH] sanitize hppfs 2008-03-19 06:42:18 -04:00
hugetlbfs mm: bdi: add separate writeback accounting capability 2008-04-30 08:29:50 -07:00
isofs isofs: fix access to unallocated memory when reading corrupted filesystem 2008-04-30 08:29:33 -07:00
jbd jbd: replace remaining __FUNCTION__ occurrences 2008-04-28 08:58:45 -07:00
jbd2 jbd2: use non-racy method for proc entries creation 2008-04-29 08:06:20 -07:00
jffs2 Merge git://git.infradead.org/mtd-2.6 2008-05-01 11:15:28 -07:00
jfs proc: remove proc_root_fs 2008-04-29 08:06:18 -07:00
lockd fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
minix iget: stop the MINIX filesystem from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
msdos fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
ncpfs ncpfs: use get/put_unaligned_* helpers 2008-04-29 08:06:28 -07:00
nfs mm: bdi: expose the BDI object in sysfs for NFS 2008-04-30 08:29:49 -07:00
nfs_common
nfsd fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
nls sparse pointer use of zero as null 2007-10-18 14:37:31 -07:00
ntfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
ocfs2 ocfs2: Use GFP_NOFS in kmalloc during localalloc window move 2008-04-30 17:09:58 -07:00
openpromfs iget: stop OPENPROMFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
partitions fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
proc task_nommu: fix compile failing bug because of spilt file.h 2008-05-04 17:08:48 -07:00
qnx4 iget: stop QNX4 from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
ramfs mm: bdi: add separate writeback accounting capability 2008-04-30 08:29:50 -07:00
reiserfs reiserfs: use open_bdev_excl 2008-04-30 08:29:51 -07:00
romfs ROMFS: Fix up an error in iget removal 2008-03-19 18:53:36 -07:00
smbfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
sysfs sysfs: Disallow truncation of files in sysfs 2008-04-30 16:52:46 -07:00
sysv sysv: [bl]e*_add_cpu conversion 2008-04-30 08:29:52 -07:00
udf fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
ufs ufs: replace __inline with inline 2008-04-28 08:58:45 -07:00
vfat fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
xfs [XFS] Include linux/random.h in all builds, not just debug. 2008-04-30 07:53:50 -07:00
aio.c debugobjects: add timer specific object debugging code 2008-04-30 08:29:53 -07:00
anon_inodes.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
attr.c VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations 2007-10-18 14:37:22 -07:00
bad_inode.c iget: introduce a function to register iget failure 2008-02-07 08:42:26 -08:00
binfmt_aout.c fs/binfmt_aout.c: use printk_ratelimit() 2008-04-29 08:06:04 -07:00
binfmt_elf_fdpic.c fdpic: check that the size returned by kernel_read() is what we asked for 2008-04-29 08:06:05 -07:00
binfmt_elf.c elf: fix shadowed variables in fs/binfmt_elf.c 2008-04-29 08:06:16 -07:00
binfmt_em86.c binfmt_misc.c: avoid potential kernel stack overflow 2008-04-29 08:06:04 -07:00
binfmt_flat.c procfs task exe symlink 2008-04-29 08:06:17 -07:00
binfmt_misc.c binfmt_misc.c: avoid potential kernel stack overflow 2008-04-29 08:06:04 -07:00
binfmt_script.c binfmt_misc.c: avoid potential kernel stack overflow 2008-04-29 08:06:04 -07:00
binfmt_som.c [PATCH] sanitize handling of shared descriptor tables in failing execve() 2008-04-25 09:23:53 -04:00
bio.c block: add dma alignment and padding support to blk_rq_map_kern 2008-04-29 09:50:34 +02:00
block_dev.c fs/block_dev.c: remove #if 0'ed code 2008-02-19 10:04:00 +01:00
buffer.c fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
char_dev.c fs: remove unused fops from struct char_device_struct 2008-04-29 08:06:01 -07:00
compat_binfmt_elf.c x86: compat_binfmt_elf 2008-01-30 13:31:46 +01:00
compat_ioctl.c tty: The big operations rework 2008-04-30 08:29:47 -07:00
compat.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
dcache.c [patch 2/7] vfs: mountinfo: add seq_file_root() 2008-04-23 00:04:38 -04:00
dcookies.c d_path: Make d_path() use a struct path 2008-02-14 21:17:09 -08:00
direct-io.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
dnotify.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
dquot.c quota: quota core changes for quotaon on remount 2008-04-28 08:58:33 -07:00
drop_caches.c vfs: skip inodes without pages to free in drop_pagecache_sb() 2008-04-29 08:06:05 -07:00
eventfd.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
eventpoll.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
exec.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
fcntl.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
fifo.c
file_table.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
file.c [PATCH] fix sysctl_nr_open bugs 2008-05-01 13:08:57 -04:00
filesystems.c
fs-writeback.c fs/fs-writeback.c: make 2 functions static 2008-04-29 08:06:00 -07:00
generic_acl.c
inode.c [PATCH] kill ->put_inode 2008-05-06 13:45:34 -04:00
inotify_user.c Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
inotify.c inotify: remove debug code 2008-02-06 10:41:07 -08:00
internal.h [PATCH] move a bunch of declarations to fs/internal.h 2008-04-21 23:11:01 -04:00
ioctl.c make vfs_ioctl() static 2008-04-29 08:06:00 -07:00
ioprio.c cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions 2008-01-28 11:38:15 +01:00
Kconfig [S390] System z large page support. 2008-04-30 13:38:47 +02:00
Kconfig.binfmt make BINFMT_FLAT a bool 2008-04-29 08:06:01 -07:00
libfs.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
locks.c [PATCH] fix SMP ordering hole in fcntl_setlk() 2008-05-06 13:58:34 -04:00
Makefile x86: compat_binfmt_elf Kconfig 2008-01-30 13:31:46 +01:00
mbcache.c vfs: fix possible deadlock in ext2, ext3, ext4 when using xattrs 2008-04-15 19:35:41 -07:00
mpage.c docbook: fix filesystems.tmpl source files 2008-03-03 10:47:13 -08:00
namei.c cgroups: implement device whitelist 2008-04-29 08:06:09 -07:00
namespace.c fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
nfsctl.c Introduce path_put() 2008-02-14 21:13:33 -08:00
no-block.c
open.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
pipe.c unified (weak) sys_pipe implementation 2008-05-03 13:50:33 -07:00
pnode.c [patch 7/7] vfs: mountinfo: show dominating group id 2008-04-23 00:05:09 -04:00
pnode.h [patch 7/7] vfs: mountinfo: show dominating group id 2008-04-23 00:05:09 -04:00
posix_acl.c
quota_v1.c quota: do not allow setting of quota limits to too high values 2008-04-28 08:58:32 -07:00
quota_v2.c quota: le*_add_cpu conversion 2008-04-30 08:29:51 -07:00
quota.c quota: quota core changes for quotaon on remount 2008-04-28 08:58:33 -07:00
read_write.c fs: use loff_t type instead of long long 2008-04-22 15:17:11 -07:00
read_write.h
readdir.c Use mutex_lock_killable in vfs_readdir 2007-12-06 17:39:54 -05:00
select.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
seq_file.c [patch 2/7] vfs: mountinfo: add seq_file_root() 2008-04-23 00:04:38 -04:00
signalfd.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
splice.c relay: fix splice problem 2008-04-29 09:48:15 +02:00
stack.c
stat.c Introduce path_put() 2008-02-14 21:13:33 -08:00
super.c make __put_super() static 2008-04-29 08:06:00 -07:00
sync.c vfs: fix unconditional write_super() call in file_fsync() 2008-04-29 08:06:06 -07:00
timerfd.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
utimes.c vfs: fix permission checking in sys_utimensat 2008-05-01 08:03:59 -07:00
xattr_acl.c
xattr.c xattr: add missing consts to function arguments 2008-04-29 08:06:06 -07:00