This is a note to let you know that I've just added the patch titled
btrfs: zoned: fix memory leak after finding block group with super blocks
to the 5.15-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:
btrfs-zoned-fix-memory-leak-after-finding-block-group-with-super-blocks.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f1a07c2b4e2c473ec322b8b9ece071b8c88a3512 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@xxxxxxxx>
Date: Mon, 3 Jul 2023 12:03:21 +0100
Subject: btrfs: zoned: fix memory leak after finding block group with super blocks
From: Filipe Manana <fdmanana@xxxxxxxx>
commit f1a07c2b4e2c473ec322b8b9ece071b8c88a3512 upstream.
At exclude_super_stripes(), if we happen to find a block group that has
super blocks mapped to it and we are on a zoned filesystem, we error out
as this is not supposed to happen, indicating either a bug or maybe some
memory corruption for example. However we are exiting the function without
freeing the memory allocated for the logical address of the super blocks.
Fix this by freeing the logical address.
Fixes: 12659251ca5d ("btrfs: implement log-structured superblock for ZONED mode")
CC: stable@xxxxxxxxxxxxxxx # 5.10+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Reviewed-by: Anand Jain <anand.jain@xxxxxxxxxx>
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/block-group.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1855,6 +1855,7 @@ static int exclude_super_stripes(struct
/* Shouldn't have super stripes in sequential zones */
if (zoned && nr) {
+ kfree(logical);
btrfs_err(fs_info,
"zoned: block group %llu must not contain super block",
cache->start);
Patches currently in stable-queue which might be from fdmanana@xxxxxxxx are
queue-5.15/btrfs-zoned-fix-memory-leak-after-finding-block-group-with-super-blocks.patch
queue-5.15/btrfs-fix-warning-when-putting-transaction-with-qgroups-enabled-after-abort.patch
