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linux-stable/fs/ext4
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Theodore Ts'o 86f0afd463 ext4: fix ext4_discard_allocated_blocks() if we can't allocate the pa struct 
If there is a failure while allocating the preallocation structure, a
number of blocks can end up getting marked in the in-memory buddy
bitmap, and then not getting released.  This can result in the
following corruption getting reported by the kernel:

EXT4-fs error (device sda3): ext4_mb_generate_buddy:758: group 1126,
12793 clusters in bitmap, 12729 in gd

In that case, we need to release the blocks using mb_free_blocks().

Tested: fs smoke test; also demonstrated that with injected errors,
	the file system is no longer getting corrupted

Google-Bug-Id: 16657874

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
 		2014-07-30 22:17:17 -04:00
..
Kconfig ext4: fix Kconfig documentation for CONFIG_EXT4_DEBUG 2013-04-21 20:32:03 -04:00
Makefile ext4: Remove CONFIG_EXT4_FS_XATTR 2012-12-10 16:30:43 -05:00
acl.c ext2/3/4: use generic posix ACL infrastructure 2014-01-25 23:58:19 -05:00
acl.h ext2/3/4: use generic posix ACL infrastructure 2014-01-25 23:58:19 -05:00
balloc.c ext4: remove metadata reservation checks 2014-07-15 06:02:38 -04:00
bitmap.c ext4: Checksum the block bitmap properly with bigalloc enabled 2012-10-22 00:34:32 -04:00
block_validity.c fs/ext4: use rbtree postorder iteration helper instead of opencoding 2014-01-23 16:37:03 -08:00
dir.c ext4: check inline directory before converting 2014-07-28 13:06:26 -04:00
ext4.h ext4: check inline directory before converting 2014-07-28 13:06:26 -04:00
ext4_extents.h ext4: rename uninitialized extents to unwritten 2014-04-20 23:45:47 -04:00
ext4_jbd2.c ext4: make local functions static 2014-05-12 10:50:23 -04:00
ext4_jbd2.h ext4: make local functions static 2014-05-12 10:50:23 -04:00
extents.c ext4: fix COLLAPSE RANGE test for bigalloc file systems 2014-07-29 10:45:31 -04:00
extents_status.c ext4: fix a potential deadlock in __ext4_es_shrink() 2014-07-12 15:32:24 -04:00
extents_status.h ext4: add ext4_es_store_pblock_status() 2014-02-19 20:15:15 -05:00
file.c ext4: remove readpage() check in ext4_mmap_file() 2014-07-15 09:56:19 -04:00
fsync.c ext4: Fix fsync error handling after filesystem abort 2013-06-12 22:38:04 -04:00
hash.c ext4: reduce one "if" comparison in ext4_dirhash() 2013-02-01 22:33:21 -05:00
ialloc.c ext4: fix potential null pointer dereference in ext4_free_inode 2014-07-12 16:11:42 -04:00
indirect.c ext4: fix punch hole on files with indirect mapping 2014-07-15 06:03:38 -04:00
inline.c ext4: check inline directory before converting 2014-07-28 13:06:26 -04:00
inode.c ext4: fix punch hole on files with indirect mapping 2014-07-15 06:03:38 -04:00
ioctl.c ext4: clean up error handling in swap_inode_boot_loader() 2014-02-17 20:44:36 -05:00
mballoc.c ext4: fix ext4_discard_allocated_blocks() if we can't allocate the pa struct 2014-07-30 22:17:17 -04:00
mballoc.h ext4: remove unused ac_ex_scanned 2014-02-20 13:32:10 -05:00
migrate.c ext4: add i_data_sem sanity check 2014-07-27 22:28:15 -04:00
mmp.c ext4: make local functions static 2014-05-12 10:50:23 -04:00
move_extent.c ext4: fix incorrect locking in move_extent_per_page 2014-07-27 22:32:27 -04:00
namei.c ext4: reduce contention on s_orphan_lock 2014-05-26 11:56:53 -04:00
page-io.c Clean ups and miscellaneous bug fixes, in particular for the new 2014-06-08 13:03:35 -07:00
resize.c Clean ups and miscellaneous bug fixes, in particular for the new 2014-06-08 13:03:35 -07:00
super.c ext4: rearrange initialization to fix EXT4FS_DEBUG 2014-07-15 06:01:38 -04:00
symlink.c ext4: Remove CONFIG_EXT4_FS_XATTR 2012-12-10 16:30:43 -05:00
truncate.h ext4: move common truncate functions to header file 2011-06-27 19:16:04 -04:00
xattr.c ext4: add missing BUFFER_TRACE before ext4_journal_get_write_access 2014-05-12 22:06:43 -04:00
xattr.h ext4: each filesystem creates and uses its own mb_cache 2014-03-18 19:24:49 -04:00
xattr_security.c Merge branch 'for_linus' into for_linus_merged 2012-01-10 11:54:07 -05:00
xattr_trusted.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
xattr_user.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00