4.15-stable review patch. If anyone has any objections, please let me know.
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From: Haishuang Yan yanhaishuang@cmss.chinamobile.com
[ Upstream commit 50670b6ee9bc4ae8f9ce3112b437987adf273245 ]
If md is NULL, tun_dst must be freed, otherwise it will cause memory leak.
Fixes: 1a66a836da6 ("gre: add collect_md mode to ERSPAN tunnel") Cc: William Tu u9012063@gmail.com Signed-off-by: Haishuang Yan yanhaishuang@cmss.chinamobile.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv4/ip_gre.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -303,8 +303,10 @@ static int erspan_rcv(struct sk_buff *sk return PACKET_REJECT;
md = ip_tunnel_info_opts(&tun_dst->u.tun_info); - if (!md) + if (!md) { + dst_release((struct dst_entry *)tun_dst); return PACKET_REJECT; + }
md->index = index; info = &tun_dst->u.tun_info;