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path: root/net/bridge/br_stp_bpdu.c
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Diffstat (limited to 'net/bridge/br_stp_bpdu.c')
-rw-r--r--net/bridge/br_stp_bpdu.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index f26516a..718cbe8 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -212,10 +212,19 @@ void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
bpdu.hello_time = br_get_ticks(buf+28);
bpdu.forward_delay = br_get_ticks(buf+30);
- br_received_config_bpdu(p, &bpdu);
- }
+ if (bpdu.message_age > bpdu.max_age) {
+ if (net_ratelimit())
+ br_notice(p->br,
+ "port %u config from %pM"
+ " (message_age %ul > max_age %ul)\n",
+ p->port_no,
+ eth_hdr(skb)->h_source,
+ bpdu.message_age, bpdu.max_age);
+ goto out;
+ }
- else if (buf[0] == BPDU_TYPE_TCN) {
+ br_received_config_bpdu(p, &bpdu);
+ } else if (buf[0] == BPDU_TYPE_TCN) {
br_received_tcn_bpdu(p);
}
out: