[IPV6] TCPMD5: Check return value of tcp_alloc_md5sig_pool().

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 3aad861975a0..b1bfbdd85d3c 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -581,7 +581,10 @@ static int tcp_v6_md5_do_add(struct sock *sk, struct in6_addr *peer,
                         }
                         sk->sk_route_caps &= ~NETIF_F_GSO_MASK;
                 }
-                tcp_alloc_md5sig_pool();
+                if (tcp_alloc_md5sig_pool() == NULL) {
+                        kfree(newkey);
+                        return -ENOMEM;
+                }
                 if (tp->md5sig_info->alloced6 == tp->md5sig_info->entries6) {
                         keys = kmalloc((sizeof (tp->md5sig_info->keys6[0]) *
                                        (tp->md5sig_info->entries6 + 1)), GFP_ATOMIC);