[PATCH 5.4 60/85] ext4: fix potential htree corruption when growing large_dir directories
From: Greg Kroah-Hartman
Date: Tue Aug 10 2021 - 13:38:43 EST
From: Theodore Ts'o <tytso@xxxxxxx>
commit 877ba3f729fd3d8ef0e29bc2a55e57cfa54b2e43 upstream.
Commit b5776e7524af ("ext4: fix potential htree index checksum
corruption) removed a required restart when multiple levels of index
nodes need to be split. Fix this to avoid directory htree corruptions
when using the large_dir feature.
Cc: stable@xxxxxxxxxx # v5.11
Cc: Благодаренко Артём <artem.blagodarenko@xxxxxxxxx>
Fixes: b5776e7524af ("ext4: fix potential htree index checksum corruption)
Reported-by: Denis <denis@xxxxxxxxxxxxx>
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/namei.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2407,7 +2407,7 @@ again:
goto journal_error;
err = ext4_handle_dirty_dx_node(handle, dir,
frame->bh);
- if (err)
+ if (restart || err)
goto journal_error;
} else {
struct dx_root *dxroot;