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authorDan Carpenter <dan.carpenter@oracle.com>2012-08-16 16:15:02 +0300
committerEric W. Biederman <ebiederm@xmission.com>2012-08-16 16:04:42 -0700
commit898132ae76d1aeb52301f10e8795c34fbb54e853 (patch)
treeae2b9b1482fdabf9456bd741bbd21e485cae8dd6 /net/ipv6/ip6_flowlabel.c
parent0625c883bc4b3eba6f93f268cf67b5664244c0fe (diff)
downloadlinux-898132ae76d1aeb52301f10e8795c34fbb54e853.tar.bz2
ipv6: move dereference after check in fl_free()
There is a dereference before checking for NULL bug here. Generally free() functions should accept NULL pointers. For example, fl_create() can pass a NULL pointer to fl_free() on the error path. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'net/ipv6/ip6_flowlabel.c')
-rw-r--r--net/ipv6/ip6_flowlabel.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index c836a6a20a34..90bbefb57943 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -91,12 +91,9 @@ static struct ip6_flowlabel *fl_lookup(struct net *net, __be32 label)
static void fl_free(struct ip6_flowlabel *fl)
{
- switch (fl->share) {
- case IPV6_FL_S_PROCESS:
- put_pid(fl->owner.pid);
- break;
- }
if (fl) {
+ if (fl->share == IPV6_FL_S_PROCESS)
+ put_pid(fl->owner.pid);
release_net(fl->fl_net);
kfree(fl->opt);
}