Btrfs: fix deadlock in run_delalloc_nocow
authorLiu Bo <bo.li.liu@oracle.com>
Thu, 25 Jan 2018 18:02:50 +0000 (11:02 -0700)
committerDavid Sterba <dsterba@suse.com>
Fri, 2 Feb 2018 15:24:19 +0000 (16:24 +0100)
commite89166990f11c3f21e1649d760dd35f9e410321c
tree889775d635ab6755456a2b29232ef3d25f696145
parent3acbcbfc8f06d4ade2aab2ebba0a2542a05ce90c
Btrfs: fix deadlock in run_delalloc_nocow

@cur_offset is not set back to what it should be (@cow_start) if
btrfs_next_leaf() returns something wrong, and the range [cow_start,
cur_offset) remains locked forever.

cc: <stable@vger.kernel.org>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/inode.c