I confirm I'm able to reproduce this bug in Raring using the
instructions in the bug description. The problem is upstream commit:
dc7b3eb ipvs: Fix reuse connection if real server is dead
It causes a NULL pointer here:
1658 if (unlikely(sysctl_expire_nodest_conn(ipvs)) && cp && cp->dest
&&
1659 unlikely(!atomic_read(&cp->dest->weight)) && !iph.fragoffs
&&
1660 is_new_conn(skb, &iph)) {
1661 ip_vs_conn_expire_now(cp);
1662 __ip_vs_conn_put(cp);
1663 cp = NULL;
1664 }
when accessing the ipvs variable. In mainline kernel, this variable is
initialised; in the 3.8 kernel it is not. I'll post a test kernel with a fix
for testing. Another option is to revert the above commit.
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https://bugs.launchpad.net/bugs/1238494
Title:
Kernel panic on 3.8.0-29 when using ipvs
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