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>
2012-07-10 07:02:09 -07:00
parent 5943634fc5
commit 710ab6c031
2 changed files with 3 additions and 6 deletions
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -794,6 +794,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
 				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;
 			}
 		}