ip_gre: fix potential memory leak in erspan_rcv
authorHaishuang Yan <yanhaishuang@cmss.chinamobile.com>
Wed, 20 Dec 2017 02:07:00 +0000 (10:07 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 20 Dec 2017 18:56:39 +0000 (13:56 -0500)
commit50670b6ee9bc4ae8f9ce3112b437987adf273245
treed44c34916c0fc090da488f5c783ea829c70c097a
parenta7343211f007fdd9e4ebeb80b40d5054798eb890
ip_gre: fix potential memory leak in erspan_rcv

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>
net/ipv4/ip_gre.c