From: Florian Westphal <fw@strlen.de>
Date: Tue, 3 Mar 2015 12:53:31 +0000 (+0100)
Subject: net: bridge: add compile-time assert for cb struct size
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=71e168b151babf4334e2e26c92230a6bda3b1f24;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

net: bridge: add compile-time assert for cb struct size

make build fail if structure no longer fits into ->cb storage.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/bridge/br.c b/net/bridge/br.c
index fb57ab6b24f9..02c24cf63c34 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -190,6 +190,8 @@ static int __init br_init(void)
 {
 	int err;
 
+	BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
+
 	err = stp_proto_register(&br_stp_proto);
 	if (err < 0) {
 		pr_err("bridge: can't register sap for STP\n");