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64a07bd82e
kernel-ark/fs
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Steven Rostedt 64a07bd82e [PATCH] protect remove_proc_entry 
It has been discovered that the remove_proc_entry has a race in the removing
of entries in the proc file system that are siblings.  There's no protection
around the traversing and removing of elements that belong in the same
subdirectory.

This subdirectory list is protected in other areas by the BKL.  So the BKL was
at first used to protect this area too, but unfortunately, remove_proc_entry
may be called with spinlocks held.  The BKL may schedule, so this was not a
solution.

The final solution was to add a new global spin lock to protect this list,
called proc_subdir_lock.  This lock now protects the list in
remove_proc_entry, and I also went around looking for other areas that this
list is modified and added this protection there too.  Care must be taken
since these locations call several functions that may also schedule.

Since I don't see any location that these functions that modify the
subdirectory list are called by interrupts, the irqsave/restore versions of
the spin lock was _not_ used.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 08:56:53 -08:00
..
9p [PATCH] 9p: fix name consistency problems 2006-03-25 08:22:54 -08:00
adfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
affs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
afs [PATCH] fs: Use ARRAY_SIZE macro 2006-03-24 07:33:19 -08:00
autofs
autofs4 [PATCH] sem2mutex: autofs4 wq_sem 2006-03-23 07:38:13 -08:00
befs fix typos "wich" -> "which" 2006-03-24 18:23:14 +01:00
bfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
cifs [PATCH] s/;;/;/g 2006-03-24 07:33:24 -08:00
coda BUG_ON() Conversion in fs/coda/ 2006-03-24 18:42:13 +01:00
configfs [PATCH] BUG_ON() Conversion in fs/configfs/ 2006-02-03 14:03:09 -08:00
cramfs [PATCH] cramfs mounts provide corrupted content since 2.6.15 2006-03-06 18:40:43 -08:00
debugfs [PATCH] debugfs: Add debugfs_create_blob() helper for exporting binary data 2006-03-20 13:42:59 -08:00
devfs
devpts [PATCH] devpts: use lib/parser.c for parsing mount options 2006-03-23 07:38:17 -08:00
efs [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
exportfs
ext2 [PATCH] Ext2 flags shouldn't report "nogrpid" 2006-03-25 08:22:58 -08:00
ext3 [PATCH] ext3: Fix debug logging-only compilation error 2006-03-25 08:22:56 -08:00
fat [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
freevxfs [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
fuse [PATCH] fuse: fix bug in negative lookup 2006-02-28 20:53:43 -08:00
hfs
hfsplus
hostfs
hpfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
hppfs
hugetlbfs [PATCH] convert hugetlbfs_counter to atomic 2006-03-22 07:54:04 -08:00
isofs [PATCH] isofs: remove unused debugging macros 2006-03-24 07:33:24 -08:00
jbd [PATCH] jbd: convert kjournald to kthread API 2006-03-25 08:22:50 -08:00
jffs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
jffs2 [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
jfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
lockd Merge git://git.linux-nfs.org/pub/linux/nfs-2.6 2006-03-25 09:18:27 -08:00
minix [PATCH] fix messages in fs/minix 2006-03-25 08:22:56 -08:00
msdos
ncpfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
nfs Merge git://git.linux-nfs.org/pub/linux/nfs-2.6 2006-03-25 09:18:27 -08:00
nfs_common
nfsd Merge git://git.linux-nfs.org/pub/linux/nfs-2.6 2006-03-25 09:18:27 -08:00
nls [PATCH] fs: Use ARRAY_SIZE macro 2006-03-24 07:33:19 -08:00
ntfs [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
ocfs2 ocfs2: finally remove MLF* macros 2006-03-24 14:58:29 -08:00
openpromfs
partitions [PATCH] s390: Remove old history/whitespave from partition code 2006-03-24 07:33:17 -08:00
proc [PATCH] protect remove_proc_entry 2006-03-26 08:56:53 -08:00
qnx4 [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
ramfs [PATCH] fs/*/file.c: drop insane header dependencies 2006-03-23 07:38:17 -08:00
reiserfs [PATCH] indirect_print_item() warning fix 2006-03-25 08:22:57 -08:00
romfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
smbfs [PATCH] smbfs: Fix debug logging-only compilation error 2006-03-25 08:22:55 -08:00
sysfs [PATCH] sysfs: fix a kobject leak in sysfs_add_link on the error path 2006-03-20 13:42:59 -08:00
sysv [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
udf [PATCH] udf: fix uid/gid options and add uid/gid=ignore and forget options 2006-03-25 08:23:00 -08:00
ufs typo patch for fs/ufs/super.c 2006-03-24 18:21:44 +01:00
vfat
xfs [PATCH] cpuset memory spread slab cache hooks 2006-03-24 07:33:23 -08:00
aio.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c BUG_ON() Conversion in fs/binfmt_elf_fdpic.c 2006-03-24 18:38:48 +01:00
binfmt_elf.c [PATCH] x86_64: Increase the variability of the process stack on 64bit architectures 2006-03-25 09:10:52 -08:00
binfmt_em86.c
binfmt_flat.c [PATCH] flat binary loader doesn't check fd table full 2006-03-25 08:23:01 -08:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
block_dev.c [PATCH] sb_set_blocksize cleanup 2006-03-24 07:33:25 -08:00
buffer.c [PATCH] freeze_bdev() cleanup 2006-03-25 08:22:56 -08:00
char_dev.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
compat_ioctl.c [PATCH] fs: Use ARRAY_SIZE macro 2006-03-24 07:33:19 -08:00
compat.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
dcache.c [PATCH] Reduce sched latency in shrink_dcache_sb() 2006-03-25 08:22:56 -08:00
dcookies.c
direct-io.c [PATCH] direct-io: bug fix in dio handling write error 2006-03-25 08:23:00 -08:00
dnotify.c
dquot.c [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
drop_caches.c
eventpoll.c [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
exec.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
fcntl.c [PATCH] Shrinks sizeof(files_struct) and better layout 2006-03-23 07:38:09 -08:00
fifo.c Simplify fifo_open() locking logic 2006-03-07 09:16:35 -08:00
file_table.c [PATCH] get_empty_filp tweaks, inline epoll_init_file() 2006-03-23 07:38:17 -08:00
file.c [PATCH] Shrinks sizeof(files_struct) and better layout 2006-03-23 07:38:09 -08:00
filesystems.c
fs-writeback.c [PATCH] Move cond_resched() after iput() in sync_sb_inodes() 2006-03-25 08:22:56 -08:00
inode.c [PATCH] fs/inode.c: make iprune_mutex static 2006-03-25 08:22:51 -08:00
inotify.c [PATCH] inotify: lock avoidance with parent watch status in dentry 2006-03-25 08:22:53 -08:00
ioctl.c
ioprio.c
Kconfig Merge branch 'linus' 2006-03-23 23:44:19 -05:00
Kconfig.binfmt
libfs.c [PATCH] sem2mutex: fs/libfs.c 2006-03-23 07:38:12 -08:00
locks.c lockd: stop abusing file_lock_list 2006-03-20 13:44:40 -05:00
Makefile [PATCH] relay: migrate from relayfs to a generic relay API 2006-03-23 19:56:55 +01:00
mbcache.c [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
mpage.c
namei.c Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current 2006-03-25 09:24:53 -08:00
namespace.c VFS: New /proc file /proc/self/mountstats 2006-03-20 13:44:12 -05:00
nfsctl.c [PATCH] fs: Use ARRAY_SIZE macro 2006-03-24 07:33:19 -08:00
open.c Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current 2006-03-25 09:24:53 -08:00
pipe.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
pnode.c [PATCH] s/;;/;/g 2006-03-24 07:33:24 -08:00
pnode.h
posix_acl.c
quota_v1.c
quota_v2.c [PATCH] sem2mutex: quota 2006-03-23 07:38:11 -08:00
quota.c [PATCH] sem2mutex: quota 2006-03-23 07:38:11 -08:00
read_write.c [PATCH] remove needless check in fs/read_write.c 2006-03-25 08:23:01 -08:00
readdir.c
select.c [PATCH] select: time comparison fixes 2006-02-17 13:59:28 -08:00
seq_file.c [PATCH] sem2mutex: fs/seq_file.c 2006-03-23 07:38:12 -08:00
stat.c [PATCH] fstatat64 support 2006-02-11 21:41:10 -08:00
super.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
xattr_acl.c
xattr.c [PATCH] Collect more inode information during syscall processing. 2006-03-20 14:08:53 -05:00