btrfs: fix leak in qgroup_subtree_accounting() error path
Coverity pointed this out; in the newly added
qgroup_subtree_accounting(), if btrfs_find_all_roots()
returns an error, we leak at least the parents pointer,
and possibly the roots pointer, depending on what failure
occurs.
If btrfs_find_all_roots() returns an error, we need to
free up all allocations before we return. "roots" is
initialized to NULL, so it should be safe to free
it unconditionally (ulist_free() handles that case).
Cc: Mark Fasheh <mfasheh@suse.de>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index b497498..8abe455 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1973,7 +1973,7 @@
elem.seq, &roots);
btrfs_put_tree_mod_seq(fs_info, &elem);
if (ret < 0)
- return ret;
+ goto out;
if (roots->nnodes != 1)
goto out;