ipv4: Avoid crashing in ip_error

[mirror_ubuntu-focal-kernel.git] / net / ipv4 / route.c

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index bff62fc87b8e266dbee59d43359fea8a77e29d60..f45f2a12f37b25b7270560498423df9488405b1d 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -902,6 +902,10 @@ static int ip_error(struct sk_buff *skb)
        bool send;
        int code;
 
+       /* IP on this device is disabled. */
+       if (!in_dev)
+               goto out;
+
        net = dev_net(rt->dst.dev);
        if (!IN_DEV_FORWARD(in_dev)) {
                switch (rt->dst.error) {