linux/fs/ext2
Nicolas Pitre 9de6886ec6 ext2: fix unbalanced kmap()/kunmap()
In ext2_rename(), dir_page is acquired through ext2_dotdot().  It is
then released through ext2_set_link() but only if old_dir != new_dir.
Failing that, the pkmap reference count is never decremented and the
page remains pinned forever.  Repeat that a couple times with highmem
pages and all pkmap slots get exhausted, and every further kmap() calls
end up stalling on the pkmap_map_wait queue at which point the whole
system comes to a halt.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Acked-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-05 13:41:08 -07:00
..
acl.c helpers for acl caching + switch to those 2009-06-24 08:17:07 -04:00
acl.h switch ext2 to inode->i_acl 2009-06-24 08:15:28 -04:00
balloc.c ext2: Use lowercase names of quota functions 2009-03-26 02:18:36 +01:00
dir.c ext2: Do not update mtime of a moved directory 2009-06-18 13:03:44 -07:00
ext2.h switch ext2 to inode->i_acl 2009-06-24 08:15:28 -04:00
file.c switch ext2 to simple_fsync() 2009-06-11 21:36:12 -04:00
ialloc.c ext2: Use lowercase names of quota functions 2009-03-26 02:18:36 +01:00
inode.c switch ext2 to inode->i_acl 2009-06-24 08:15:28 -04:00
ioctl.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
Kconfig fs/Kconfig: move ext2, ext3, ext4, JBD, JBD2 out 2008-10-20 11:43:59 -07:00
Makefile switch ext2 to simple_fsync() 2009-06-11 21:36:12 -04:00
namei.c ext2: fix unbalanced kmap()/kunmap() 2009-09-05 13:41:08 -07:00
super.c switch ext2 to inode->i_acl 2009-06-24 08:15:28 -04:00
symlink.c [PATCH] mark struct inode_operations const 1 2007-02-12 09:48:46 -08:00
xattr.c ext2: Use lowercase names of quota functions 2009-03-26 02:18:36 +01:00
xattr.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
xattr_security.c ext2: remove double definitions of xattr macros 2008-07-25 10:53:31 -07:00
xattr_trusted.c ext2: remove double definitions of xattr macros 2008-07-25 10:53:31 -07:00
xattr_user.c ext2: remove double definitions of xattr macros 2008-07-25 10:53:31 -07:00
xip.c [PATCH] move block_device_operations to blkdev.h 2008-10-21 07:47:20 -04:00
xip.h xip: support non-struct page backed memory 2008-04-28 08:58:23 -07:00