net: avoid NULL deref in inet_ctl_sock_destroy()
Under low memory conditions, tcp_sk_init() and icmp_sk_init()
can both iterate on all possible cpus and call inet_ctl_sock_destroy(),
with eventual NULL pointer.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/inet_common.h b/include/net/inet_common.h
index 279f835..109e3ee 100644
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -41,7 +41,8 @@
static inline void inet_ctl_sock_destroy(struct sock *sk)
{
- sock_release(sk->sk_socket);
+ if (sk)
+ sock_release(sk->sk_socket);
}
#endif