From 2963457829decf0c824a443238d251151ed18ff5 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Jun 2022 18:03:19 +0200 Subject: btrfs: zoned: fix a leaked bioc in read_zone_info The bioc would leak on the normal completion path and also on the RAID56 check (but that one won't happen in practice due to the invalid combination with zoned mode). Fixes: 7db1c5d14dcd ("btrfs: zoned: support dev-replace in zoned filesystems") CC: stable@vger.kernel.org # 5.16+ Reviewed-by: Anand Jain Signed-off-by: Christoph Hellwig [ update changelog ] Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/zoned.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'fs') diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 8aec53528efa..9892f7413705 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -1736,12 +1736,14 @@ static int read_zone_info(struct btrfs_fs_info *fs_info, u64 logical, ret = btrfs_map_sblock(fs_info, BTRFS_MAP_GET_READ_MIRRORS, logical, &mapped_length, &bioc); if (ret || !bioc || mapped_length < PAGE_SIZE) { - btrfs_put_bioc(bioc); - return -EIO; + ret = -EIO; + goto out_put_bioc; } - if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) - return -EINVAL; + if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) { + ret = -EINVAL; + goto out_put_bioc; + } nofs_flag = memalloc_nofs_save(); nmirrors = (int)bioc->num_stripes; @@ -1760,7 +1762,8 @@ static int read_zone_info(struct btrfs_fs_info *fs_info, u64 logical, break; } memalloc_nofs_restore(nofs_flag); - +out_put_bioc: + btrfs_put_bioc(bioc); return ret; } -- cgit v1.2.3