From: Liping Zhang Date: Mon, 8 Aug 2016 14:03:40 +0000 (+0800) Subject: netfilter: nfnetlink_queue: fix memory leak when attach expectation successfully X-Git-Tag: v5.15~13012^2~28^2~3 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=b18bcb0019cf57a3db0917b77e65c29bd9b00f54;p=mirror_ubuntu-kernels.git netfilter: nfnetlink_queue: fix memory leak when attach expectation successfully User can use NFQA_EXP to attach expectations to conntracks, but we forget to put back nf_conntrack_expect when it is inserted successfully, i.e. in this normal case, expect's use refcnt will be 3. So even we unlink it and put it back later, the use refcnt is still 1, then the memory will be leaked forever. Signed-off-by: Liping Zhang Signed-off-by: Pablo Neira Ayuso --- diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 050bb3420a6b..b9bfe64e232c 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -2362,12 +2362,8 @@ ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, return PTR_ERR(exp); err = nf_ct_expect_related_report(exp, portid, report); - if (err < 0) { - nf_ct_expect_put(exp); - return err; - } - - return 0; + nf_ct_expect_put(exp); + return err; } static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,