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btrfs: fix leak in qgroup_subtree_accounting() error path

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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>
This commit is contained in:
Eric Sandeen 2014-08-17 15:09:21 -05:00 committed by Chris Mason
parent 51f395ad40
commit a3c108950d
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/qgroup.c
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@ -1973,7 +1973,7 @@ static int qgroup_subtree_accounting(struct btrfs_trans_handle *trans,
elem.seq, &roots);
btrfs_put_tree_mod_seq(fs_info, &elem);
if (ret < 0)
return ret;
goto out;
if (roots->nnodes != 1)
goto out;