FAILED: patch "[PATCH] ext4: fix memory leak in ext4_mb_init_backend on error path." failed to apply to 4.9-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a8867f4e3809050571c98de7a2d465aff5e4daf5 Mon Sep 17 00:00:00 2001
From: Phillip Potter <phil@philpotter.co.uk>
Date: Mon, 12 Apr 2021 08:38:37 +0100
Subject: [PATCH] ext4: fix memory leak in ext4_mb_init_backend on error path.

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@syzkaller.appspotmail.com
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20210412073837.1686-1-phil@philpotter.co.uk
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 3239e6669e84..c2c22c2baac0 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3217,7 +3217,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
 		 */
 		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));