diff options
| author | Julia Lawall <julia@diku.dk> | 2011-05-14 07:10:51 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-05-23 13:24:41 -0400 |
| commit | b083916638eee513be501f53b42a4be0b9851db0 (patch) | |
| tree | b62c38c87d368ca1e5cc5be067094ba82e6bf8a0 /fs/btrfs/super.c | |
| parent | 37daa4f968e9470ae9f30e246a5781717c598271 (diff) | |
fs/btrfs: Add missing btrfs_free_path
Btrfs_alloc_path should be matched with btrfs_free_path in error-handling code.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
local idexpression struct btrfs_path * x;
expression ra,rb;
position p1,p2;
@@
x = btrfs_alloc_path@p1(...)
... when != btrfs_free_path(x,...)
when != if (...) { ... btrfs_free_path(x,...) ...}
when != x = ra
if(...) { ... when != x = rb
when forall
when != btrfs_free_path(x,...)
\(return <+...x...+>; \| return@p2...; \) }
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("alloc",p1)
cocci.print_secs("return",p2)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 0ac712efcdf..46d7eed7e96 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -506,8 +506,10 @@ static struct dentry *get_default_root(struct super_block *sb, */ dir_id = btrfs_super_root_dir(&root->fs_info->super_copy); di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0); - if (IS_ERR(di)) + if (IS_ERR(di)) { + btrfs_free_path(path); return ERR_CAST(di); + } if (!di) { /* * Ok the default dir item isn't there. This is weird since |