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| author | Julia Lawall <julia@diku.dk> | 2009-09-29 13:51:04 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-09-29 13:51:04 -0400 |
| commit | fd2696f399e45347c07f1f7f340e8515cace5657 (patch) | |
| tree | bd1a1c1907b5a344257673761bdf69629fd7cdba /fs | |
| parent | 49cf6f4529b7945ef51b8e39f0bac630726f8c96 (diff) | |
| download | linux-fd2696f399e45347c07f1f7f340e8515cace5657.tar.gz linux-fd2696f399e45347c07f1f7f340e8515cace5657.tar.bz2 linux-fd2696f399e45347c07f1f7f340e8515cace5657.zip | |
Btrfs: introduce missing kfree
Error handling code following a kzalloc should free the allocated data.
The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,f1,l;
position p1,p2;
expression *ptr != NULL;
@@
x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
when != if (...) { <+...x...+> }
(
x->f1 = E
|
(x->f1 == NULL || ...)
|
f(...,x->f1,...)
)
...>
(
return \(0\|<+...x...+>\|ptr\);
|
return@p2 ...;
)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/volumes.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index be953afe804c..20cbd2eebd97 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -446,8 +446,10 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig) goto error; device->name = kstrdup(orig_dev->name, GFP_NOFS); - if (!device->name) + if (!device->name) { + kfree(device); goto error; + } device->devid = orig_dev->devid; device->work.func = pending_bios_fn; |