[net-next PATCH 3/3] net: sched: cls_cgroup fix possible memory leak of 'new'
From: John Fastabend <john.fastabend@gmail.com>
Date: 2014-09-16 02:48:57
Subsystem:
networking [general], tc subsystem, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Jamal Hadi Salim, Jiri Pirko, Linus Torvalds
tree: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 54996b529ab70ca1d6f40677cd2698c4f7127e87 commit: c7953ef23042b7c4fc2be5ecdd216aacff6df5eb [625/646] net: sched: cls_cgroup use RCU net/sched/cls_cgroup.c:130 cls_cgroup_change() warn: possible memory leak of 'new' net/sched/cls_cgroup.c:135 cls_cgroup_change() warn: possible memory leak of 'new' net/sched/cls_cgroup.c:139 cls_cgroup_change() warn: possible memory leak of 'new' Reported-by: Dan Carpenter <redacted> Signed-off-by: John Fastabend <redacted> --- net/sched/cls_cgroup.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index 3b75487..52b7900 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c@@ -127,16 +127,16 @@ static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb, err = nla_parse_nested(tb, TCA_CGROUP_MAX, tca[TCA_OPTIONS], cgroup_policy); if (err < 0) - return err; + goto errout; tcf_exts_init(&e, TCA_CGROUP_ACT, TCA_CGROUP_POLICE); err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr); if (err < 0) - return err; + goto errout; err = tcf_em_tree_validate(tp, tb[TCA_CGROUP_EMATCHES], &t); if (err < 0) - return err; + goto errout; tcf_exts_change(tp, &new->exts, &e); tcf_em_tree_change(tp, &new->ematches, &t);
@@ -145,6 +145,9 @@ static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb, if (head) call_rcu(&head->rcu, cls_cgroup_destroy_rcu); return 0; +errout: + kfree(new); + return err; } static void cls_cgroup_destroy(struct tcf_proto *tp)