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d438147211
linux/fs/ext4
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Eryu Guan d438147211 ext4: no need to remove extent if len is 0 in ext4_es_remove_extent() 
len is 0 means no extent needs to be removed, so return immediately.
Otherwise it could trigger the following BUG_ON() in
ext4_es_remove_extent()

	end = lblk + len - 1;
	BUG_ON(end < lblk);

This could be reproduced by a simple truncate(1) command by an
unprivileged user

	truncate -s $(($((2**32 - 1)) * 4096)) /mnt/ext4/testfile

The same is true for __es_insert_extent().

Patched kernel passed xfstests regression test.

Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
2013-02-22 15:27:47 -05:00
..
acl.c ext4: fix the number of credits needed for acl ops with inline data 2013-02-09 15:23:03 -05:00
acl.h fs: take the ACL checks to common code 2011-07-25 14:30:23 -04:00
balloc.c ext4: check bh in ext4_read_block_bitmap() 2013-01-12 16:33:25 -05:00
bitmap.c ext4: Checksum the block bitmap properly with bigalloc enabled 2012-10-22 00:34:32 -04:00
block_validity.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
dir.c ext4: release buffer when checksum failed 2013-01-28 21:23:24 -05:00
ext4_extents.h ext4: remove single extent cache 2013-02-18 00:31:07 -05:00
ext4_jbd2.c ext4: pass context information to jbd2__journal_start() 2013-02-08 21:59:22 -05:00
ext4_jbd2.h ext4: fix the number of credits needed for acl ops with inline data 2013-02-09 15:23:03 -05:00
ext4.h ext4: reclaim extents from extent status tree 2013-02-18 00:32:55 -05:00
extents_status.c ext4: no need to remove extent if len is 0 in ext4_es_remove_extent() 2013-02-22 15:27:47 -05:00
extents_status.h ext4: reclaim extents from extent status tree 2013-02-18 00:32:55 -05:00
extents.c ext4: remove single extent cache 2013-02-18 00:31:07 -05:00
file.c ext4: rename and improbe ext4_es_find_extent() 2013-02-18 00:27:26 -05:00
fsync.c ext4: fix an incorrect comment about i_mutex 2012-12-25 13:31:52 -05:00
hash.c ext4: reduce one "if" comparison in ext4_dirhash() 2013-02-01 22:33:21 -05:00
ialloc.c ext4: use KERN_WARNING for warning messages 2013-02-14 15:11:41 -05:00
indirect.c ext4: pass context information to jbd2__journal_start() 2013-02-08 21:59:22 -05:00
inline.c ext4: pass context information to jbd2__journal_start() 2013-02-08 21:59:22 -05:00
inode.c ext4: lookup block mapping in extent status tree 2013-02-18 00:29:59 -05:00
ioctl.c ext4: pass context information to jbd2__journal_start() 2013-02-08 21:59:22 -05:00
Kconfig ext4: fix configuration dependencies for ext4 ACLs and security labels 2013-01-06 23:38:44 -05:00
Makefile ext4: Remove CONFIG_EXT4_FS_XATTR 2012-12-10 16:30:43 -05:00
mballoc.c ext4: use module parameters instead of debugfs for mballoc_debug 2013-02-09 16:28:20 -05:00
mballoc.h ext4: use module parameters instead of debugfs for mballoc_debug 2013-02-09 16:28:20 -05:00
migrate.c ext4: fix the number of credits needed for ext4_ext_migrate() 2013-02-09 12:50:27 -05:00
mmp.c ext4: use unlikely to improve the efficiency of the kernel 2013-01-12 16:28:47 -05:00
move_extent.c ext4: remove single extent cache 2013-02-18 00:31:07 -05:00
namei.c ext4: use ERR_PTR() abstraction for ext4_append() 2013-02-15 03:35:57 -05:00
page-io.c ext4: fix possible use-after-free with AIO 2013-01-29 22:48:17 -05:00
resize.c ext4: pass context information to jbd2__journal_start() 2013-02-08 21:59:22 -05:00
super.c ext4: reclaim extents from extent status tree 2013-02-18 00:32:55 -05:00
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_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
xattr.c ext4: fix xattr block allocation/release with bigalloc 2013-02-18 12:12:07 -05:00
xattr.h ext4: fix the number of credits needed for acl ops with inline data 2013-02-09 15:23:03 -05:00