From afb4c97d90e62f33b9f389aa0023f8478bb89db2 Mon Sep 17 00:00:00 2001 From: Haishuang Yan Date: Wed, 20 Dec 2017 10:07:01 +0800 Subject: [PATCH] ip6_gre: fix potential memory leak in ip6erspan_rcv If md is NULL, tun_dst must be freed, otherwise it will cause memory leak. Fixes: ef7baf5e083c ("ip6_gre: add ip6 erspan collect_md mode") Cc: William Tu Signed-off-by: Haishuang Yan Signed-off-by: David S. Miller --- net/ipv6/ip6_gre.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index b7a79ddcf851..8451d00b210b 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -550,8 +550,10 @@ static int ip6erspan_rcv(struct sk_buff *skb, int gre_hdr_len, info = &tun_dst->u.tun_info; md = ip_tunnel_info_opts(info); - if (!md) + if (!md) { + dst_release((struct dst_entry *)tun_dst); return PACKET_REJECT; + } memcpy(md, pkt_md, sizeof(*md)); md->version = ver; -- GitLab