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linux/fs/ext4
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Sriram Rajagopalan 13c4be25bd ext4: zero out the unused memory region in the extent tree block 
commit 592acbf168 upstream.

This commit zeroes out the unused memory region in the buffer_head
corresponding to the extent metablock after writing the extent header
and the corresponding extent node entries.

This is done to prevent random uninitialized data from getting into
the filesystem when the extent block is synced.

This fixes CVE-2019-11833.

Signed-off-by: Sriram Rajagopalan <sriramr@arista.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2019-06-20 18:11:27 +01:00
..
acl.c ext4: Don't clear SGID when inheriting ACLs 2017-10-12 15:28:09 +01:00
acl.h ext2/3/4: use generic posix ACL infrastructure 2014-01-25 23:58:19 -05:00
balloc.c ext4: check for allocation block validity with block group locked 2018-11-20 18:05:39 +00:00
bitmap.c ext4: Replace open coded mdata csum feature to helper function 2014-11-05 11:43:06 +00:00
block_validity.c fs/ext4: use rbtree postorder iteration helper instead of opencoding 2014-01-23 16:37:03 -08:00
dir.c ext4: avoid divide by zero fault when deleting corrupted inline directories 2018-12-16 22:08:55 +00:00
ext4.h ext4: ext4_inline_data_fiemap should respect callers argument 2019-04-04 16:14:06 +01:00
ext4_extents.h ext4: verify the depth of extent tree in ext4_find_extent() 2018-09-25 23:47:27 +01:00
ext4_jbd2.c ext4: fix potential use after free in __ext4_journal_stop 2015-12-13 17:48:47 +00:00
ext4_jbd2.h ext4: make local functions static 2014-05-12 10:50:23 -04:00
extents.c ext4: zero out the unused memory region in the extent tree block 2019-06-20 18:11:27 +01:00
extents_status.c ext4: fix data corruption caused by unwritten and delayed extents 2015-05-12 09:36:39 +01:00
extents_status.h ext4: add ext4_es_store_pblock_status() 2014-02-19 20:15:15 -05:00
file.c ext4: do not update s_last_mounted of a frozen fs 2018-11-20 18:04:53 +00:00
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: avoid declaring fs inconsistent due to invalid file handles 2019-04-04 16:13:59 +01:00
indirect.c ext4: protect i_disksize update by i_data_sem in direct write path 2018-10-21 08:44:57 +01:00
inline.c ext4: fix a potential fiemap/page fault deadlock w/ inline_data 2019-04-04 16:14:06 +01:00
inode.c ext4: fix special inode number checks in __ext4_iget() 2019-04-04 16:14:10 +01:00
ioctl.c ext4: avoid declaring fs inconsistent due to invalid file handles 2019-04-04 16:13:59 +01:00
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
mballoc.c ext4: fix spectre gadget in ext4_mb_regular_allocator() 2018-12-16 22:08:32 +00:00
mballoc.h ext4: remove unused ac_ex_scanned 2014-02-20 13:32:10 -05:00
migrate.c ext4: correctly migrate a file with a hole at the beginning 2015-07-20 14:38:52 +01:00
mmp.c ext4: don't mark mmp buffer head dirty 2018-12-16 22:09:18 +00:00
move_extent.c ext4: add lockdep annotations for i_data_sem 2016-05-01 00:06:07 +02:00
namei.c ext4: avoid declaring fs inconsistent due to invalid file handles 2019-04-04 16:13:59 +01:00
page-io.c Clean ups and miscellaneous bug fixes, in particular for the new 2014-06-08 13:03:35 -07:00
resize.c ext4: avoid declaring fs inconsistent due to invalid file handles 2019-04-04 16:13:59 +01:00
super.c ext4: avoid kernel warning when writing the superblock to a dead device 2019-04-04 16:14:09 +01:00
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: include terminating u32 in size of xattr entries when expanding inodes 2019-04-04 16:13:59 +01:00
xattr.h ext4: add extra checks to ext4_xattr_block_get() 2018-10-21 08:45:08 +01:00
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