diff options
| author | Pan Bian <bianpan2016@163.com> | 2017-04-23 14:28:37 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-24 15:51:30 -0400 |
| commit | a50fe0ffd76fbd17af36209a16caf0b8ad901fef (patch) | |
| tree | a948f0c673aedde2585c8f243a88e0c0bbbeae9f | |
| parent | 09d36071cfbc1fec9c93a30704b687829ee5efef (diff) | |
lwtunnel: check return value of nla_nest_start
Function nla_nest_start() may return a NULL pointer on error. However,
in function lwtunnel_fill_encap(), the return value of nla_nest_start()
is not validated before it is used. This patch checks the return value
of nla_nest_start() against NULL.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/lwtunnel.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c index b5888190223c..5cbed3816229 100644 --- a/net/core/lwtunnel.c +++ b/net/core/lwtunnel.c @@ -214,6 +214,8 @@ int lwtunnel_fill_encap(struct sk_buff *skb, struct lwtunnel_state *lwtstate) ret = -EOPNOTSUPP; nest = nla_nest_start(skb, RTA_ENCAP); + if (!nest) + goto nla_put_failure; rcu_read_lock(); ops = rcu_dereference(lwtun_encaps[lwtstate->type]); if (likely(ops && ops->fill_encap)) |