From: Christoph Hellwig hch@lst.de
commit 2963457829decf0c824a443238d251151ed18ff5 upstream.
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 anand.jain@oracle.com Signed-off-by: Christoph Hellwig hch@lst.de [ update changelog ] 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/zoned.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
--- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -1727,12 +1727,14 @@ static int read_zone_info(struct btrfs_f 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; @@ -1751,7 +1753,8 @@ static int read_zone_info(struct btrfs_f break; } memalloc_nofs_restore(nofs_flag); - +out_put_bioc: + btrfs_put_bioc(bioc); return ret; }