From e747f64336fc15e1c823344942923195b800aa1e Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Wed, 14 Jun 2017 13:35:37 +0300 Subject: xfrm: NULL dereference on allocation failure The default error code in pfkey_msg2xfrm_state() is -ENOBUFS. We added a new call to security_xfrm_state_alloc() which sets "err" to zero so there several places where we can return ERR_PTR(0) if kmalloc() fails. The caller is expecting error pointers so it leads to a NULL dereference. Fixes: df71837d5024 ("[LSM-IPSec]: Security association restriction.") Signed-off-by: Dan Carpenter Signed-off-by: Steffen Klassert --- net/key/af_key.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net') diff --git a/net/key/af_key.c b/net/key/af_key.c index 2b82adac5d8e..b1432b668033 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1157,6 +1157,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, goto out; } + err = -ENOBUFS; key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; if (sa->sadb_sa_auth) { int keysize = 0; -- cgit