netfilter: only warn once on wrong seqadj usage

[platform/adaptation/renesas_rcar/renesas_kernel.git] / net / netfilter / nf_conntrack_seqadj.c

diff --git a/net/netfilter/nf_conntrack_seqadj.c b/net/netfilter/nf_conntrack_seqadj.c
index 17c1bcb..f6e2ae9 100644 (file)
--- a/net/netfilter/nf_conntrack_seqadj.c
+++ b/net/netfilter/nf_conntrack_seqadj.c
@@ -36,6 +36,11 @@ int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
        if (off == 0)
                return 0;
 
+       if (unlikely(!seqadj)) {
+               WARN_ONCE(1, "Missing nfct_seqadj_ext_add() setup call\n");
+               return 0;
+       }
+
        set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
 
        spin_lock_bh(&ct->lock);