This is a note to let you know that I've just added the patch titled
ext4: fix memory leak in ext4_mb_init_backend on error path.
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ext4-fix-memory-leak-in-ext4_mb_init_backend-on-error-path.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a8867f4e3809050571c98de7a2d465aff5e4daf5 Mon Sep 17 00:00:00 2001
From: Phillip Potter <phil@xxxxxxxxxxxxxxxx>
Date: Mon, 12 Apr 2021 08:38:37 +0100
Subject: ext4: fix memory leak in ext4_mb_init_backend on error path.
From: Phillip Potter <phil@xxxxxxxxxxxxxxxx>
commit a8867f4e3809050571c98de7a2d465aff5e4daf5 upstream.
Fix a memory leak discovered by syzbot when a file system is corrupted
with an illegally large s_log_groups_per_flex.
Reported-by: syzbot+aa12d6106ea4ca1b6aae@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Phillip Potter <phil@xxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxx
Link: https://lore.kernel.org/r/20210412073837.1686-1-phil@xxxxxxxxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/mballoc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2738,7 +2738,7 @@ static int ext4_mb_init_backend(struct s
*/
if (sbi->s_es->s_log_groups_per_flex >= 32) {
ext4_msg(sb, KERN_ERR, "too many log groups per flexible block group");
- goto err_freesgi;
+ goto err_freebuddy;
}
sbi->s_mb_prefetch = min_t(uint, 1 << sbi->s_es->s_log_groups_per_flex,
BLK_MAX_SEGMENT_SIZE >> (sb->s_blocksize_bits - 9));
Patches currently in stable-queue which might be from phil@xxxxxxxxxxxxxxxx are
queue-5.10/ext4-fix-memory-leak-in-ext4_mb_init_backend-on-error-path.patch
