Thread (16 messages) flat view 16 messages, 3 authors, 2012-07-06

Re: BUG: unable to handle kernel paging request at 00000000d8be176d

From: Eric Dumazet <hidden>
Date: 2012-07-06 06:41:52

On Fri, 2012-07-06 at 08:13 +0200, Eric Dumazet wrote:
quoted hunk ↗ jump to hunk
On Fri, 2012-07-06 at 13:58 +0800, Fengguang Wu wrote:
quoted
On Thu, Jul 05, 2012 at 02:22:00PM -0700, David Miller wrote:
quoted
Steffen Klassert posted a patch which fixes this.
Steffen's patch converts one oops message into another.

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head:   700db99d0140e9da2a31e08ebd3e1b121691aa26
commit: a2de86f63cfc92f7aaf11e7b9d9f2150946a1622 [1/2] ipv6: Initialize the neighbour pointer of rt6_info on allocation

x86_64-allyesdebian         BBB
Please try :
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 6d9c0ab..c6af596 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -975,7 +975,7 @@ static int ip6_dst_lookup_tail(struct sock *sk,
 	 * dst entry of the nexthop router
 	 */
 	rcu_read_lock();
-	rt = (struct rt6_info *) dst;
+	rt = (struct rt6_info *) *dst;
 	n = rt->n;
 	if (n && !(n->nud_state & NUD_VALID)) {
 		struct inet6_ifaddr *ifp;
David, what do you think if I submit a patch using following accessor ?

/* get a rt6_info given a dst_entry pointer */
static inline struct rt6_info *dst_rt6_info(struct dst_entry *dst)
{
	return (struct rt6_info *)dst;
}
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