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authorLinus Torvalds <torvalds@linux-foundation.org>2019-05-19 11:43:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-19 11:43:16 -0700
commitc4d36b63b28b76cd584bec48af7b562b4513b87b (patch)
tree7153f399e00d4ab8bf89bd939b5b626cb183d2d9 /fs/ext4/namei.c
parentd8848eefc1d541dd0e3ae175e09fb5c66f1d4de6 (diff)
parent2c1d0e3631e5732dba98ef49ac0bec1388776793 (diff)
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o: "Some bug fixes, and an update to the URL's for the final version of Unicode 12.1.0" * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: avoid panic during forced reboot due to aborted journal ext4: fix block validity checks for journal inodes using indirect blocks unicode: update to Unicode 12.1.0 final unicode: add missing check for an error return from utf8lookup() ext4: fix miscellaneous sparse warnings ext4: unsigned int compared against zero ext4: fix use-after-free in dx_release() ext4: fix data corruption caused by overlapping unaligned and aligned IO jbd2: fix potential double free ext4: zero out the unused memory region in the extent tree block
Diffstat (limited to 'fs/ext4/namei.c')
-rw-r--r--fs/ext4/namei.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 6d50f53b7a15..cd01c4a67ffb 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -872,12 +872,15 @@ static void dx_release(struct dx_frame *frames)
{
struct dx_root_info *info;
int i;
+ unsigned int indirect_levels;
if (frames[0].bh == NULL)
return;
info = &((struct dx_root *)frames[0].bh->b_data)->info;
- for (i = 0; i <= info->indirect_levels; i++) {
+ /* save local copy, "info" may be freed after brelse() */
+ indirect_levels = info->indirect_levels;
+ for (i = 0; i <= indirect_levels; i++) {
if (frames[i].bh == NULL)
break;
brelse(frames[i].bh);