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authorJulia Lawall <julia@diku.dk>2009-09-29 13:51:04 -0400
committerChris Mason <chris.mason@oracle.com>2009-09-29 13:51:04 -0400
commitfd2696f399e45347c07f1f7f340e8515cace5657 (patch)
treebd1a1c1907b5a344257673761bdf69629fd7cdba
parent49cf6f4529b7945ef51b8e39f0bac630726f8c96 (diff)
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>
-rw-r--r--fs/btrfs/volumes.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index be953af..20cbd2e 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;