Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[cascardo/linux.git] / net / ipv6 / ip6_output.c

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index c265068..3c8e9d8 100644 (file)
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -28,7 +28,6 @@
 
 #include <linux/errno.h>
 #include <linux/kernel.h>
-#include <linux/overflow-arith.h>
 #include <linux/string.h>
 #include <linux/socket.h>
 #include <linux/net.h>
@@ -597,10 +596,9 @@ int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
                if (np->frag_size)
                        mtu = np->frag_size;
        }
-
-       if (overflow_usub(mtu, hlen + sizeof(struct frag_hdr), &mtu) ||
-           mtu <= 7)
+       if (mtu < hlen + sizeof(struct frag_hdr) + 8)
                goto fail_toobig;
+       mtu -= hlen + sizeof(struct frag_hdr);
 
        frag_id = ipv6_select_ident(net, &ipv6_hdr(skb)->daddr,
                                    &ipv6_hdr(skb)->saddr);