ipv4: Enforce max MTU metric at route insertion time.
Rather than at every struct rtable creation.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index ae301c8..d71bfbd 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -794,6 +794,8 @@
val = nla_get_u32(nla);
if (type == RTAX_ADVMSS && val > 65535 - 40)
val = 65535 - 40;
+ if (type == RTAX_MTU && val > 65535 - 15)
+ val = 65535 - 15;
fi->fib_metrics[type - 1] = val;
}
}