[PATCH] IPV6: fix an oops in rt6_device_match()

[YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@xxxxxxxxxxxxxx>]

Hello.

This fixes panic in rt6_device_match().

Well, rt->rt6i_idev is always set if it is dynamically allocated.
However, when we hit ip6_null_entry here, its rt6i_idev is NULL.
This patch is minimum fix to avoid the oops for now.

Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>

===== net/ipv6/route.c 1.89 vs edited =====
--- 1.89/net/ipv6/route.c       2004-08-25 03:20:43 +09:00
+++ edited/net/ipv6/route.c     2004-09-11 19:31:24 +09:00
@@ -184,7 +184,8 @@
                        if (dev->ifindex == oif)
                                return sprt;
                        if (dev->flags & IFF_LOOPBACK) {
-                               if (sprt->rt6i_idev->dev->ifindex != oif) {
+                               if (sprt->rt6i_idev == NULL ||
+                                   sprt->rt6i_idev->dev->ifindex != oif) {
                                        if (strict && oif)
                                                continue;
                                        if (local && (!oif || 

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@xxxxxxxxxxxxxx>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA