diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index 052f1b920e43fe745f2e06cb757418fe78c9cd9c..37aa1650c74eb250ede179893eccaf6145ef713d 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -1048,6 +1048,13 @@ static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) if (!skb->secmark) return 0; + /* + * If reach here before socket_post_create hook is called, in which + * case label is null, drop the packet. + */ + if (!ctx->label) + return -EACCES; + return apparmor_secmark_check(ctx->label, OP_RECVMSG, AA_MAY_RECEIVE, skb->secmark, sk); }