ipv6: syncookies: free reqsk on xfrm_lookup error
cookie_v6_check() did not call reqsk_free() if xfrm_lookup() fails,
leaking the request sock.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index a46badd..ec394cf 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -199,10 +199,8 @@
ireq6 = inet6_rsk(req);
treq = tcp_rsk(req);
- if (security_inet_conn_request(sk, skb, req)) {
- reqsk_free(req);
- goto out;
- }
+ if (security_inet_conn_request(sk, skb, req))
+ goto out_free;
req->mss = mss;
ireq->rmt_port = th->source;
@@ -255,14 +253,13 @@
fl.fl_ip_dport = inet_rsk(req)->rmt_port;
fl.fl_ip_sport = inet_sk(sk)->sport;
security_req_classify_flow(req, &fl);
- if (ip6_dst_lookup(sk, &dst, &fl)) {
- reqsk_free(req);
- goto out;
- }
+ if (ip6_dst_lookup(sk, &dst, &fl))
+ goto out_free;
+
if (final_p)
ipv6_addr_copy(&fl.fl6_dst, final_p);
if ((xfrm_lookup(&dst, &fl, sk, 0)) < 0)
- goto out;
+ goto out_free;
}
req->window_clamp = tp->window_clamp ? :dst_metric(dst, RTAX_WINDOW);
@@ -273,7 +270,10 @@
ireq->rcv_wscale = rcv_wscale;
ret = get_cookie_sock(sk, skb, req, dst);
-
-out: return ret;
+out:
+ return ret;
+out_free:
+ reqsk_free(req);
+ return NULL;
}