From: Vlad Buslov Date: Mon, 25 Feb 2019 15:28:27 +0000 (+0200) Subject: net: sched: act_tunnel_key: fix NULL pointer dereference during init X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a3df633a3c92bb96b06552c3f828d7c267774379;p=linux.git net: sched: act_tunnel_key: fix NULL pointer dereference during init Metadata pointer is only initialized for action TCA_TUNNEL_KEY_ACT_SET, but it is unconditionally dereferenced in tunnel_key_init() error handler. Verify that metadata pointer is not NULL before dereferencing it in tunnel_key_init error handling code. Fixes: ee28bb56ac5b ("net/sched: fix memory leak in act_tunnel_key_init()") Signed-off-by: Vlad Buslov Reviewed-by: Davide Caratti Signed-off-by: David S. Miller --- diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c index 8b43fe0130f73..3f943de9a2c97 100644 --- a/net/sched/act_tunnel_key.c +++ b/net/sched/act_tunnel_key.c @@ -377,7 +377,8 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla, return ret; release_tun_meta: - dst_release(&metadata->dst); + if (metadata) + dst_release(&metadata->dst); err_out: if (exists)