6.6-stable review patch. If anyone has any objections, please let me know.
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From: Zilin Guan zilin@seu.edu.cn
commit 5fea61aa1ca70c4b3738eebad9ce2d7e7938ebbd upstream.
scrub_raid56_parity_stripe() allocates a bio with bio_alloc(), but fails to release it on some error paths, leading to a potential memory leak.
Add the missing bio_put() calls to properly drop the bio reference in those error cases.
Fixes: 1009254bf22a3 ("btrfs: scrub: use scrub_stripe to implement RAID56 P/Q scrub") CC: stable@vger.kernel.org # 6.6+ Reviewed-by: Qu Wenruo wqu@suse.com Signed-off-by: Zilin Guan zilin@seu.edu.cn Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/scrub.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -2000,6 +2000,7 @@ static int scrub_raid56_parity_stripe(st ret = btrfs_map_block(fs_info, BTRFS_MAP_WRITE, full_stripe_start, &length, &bioc, NULL, NULL, 1); if (ret < 0) { + bio_put(bio); btrfs_put_bioc(bioc); btrfs_bio_counter_dec(fs_info); goto out; @@ -2009,6 +2010,7 @@ static int scrub_raid56_parity_stripe(st btrfs_put_bioc(bioc); if (!rbio) { ret = -ENOMEM; + bio_put(bio); btrfs_bio_counter_dec(fs_info); goto out; }