david at blue-labs
Nov 26, 2009, 2:33 AM
Post #1 of 1
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[PATCH] additional update of dev_net(net) to struct *net in ip_fragment.c, NULL ptr OOPS
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ipv4 ip_frag_reasm(), fully replace 'dev_net(dev)' with 'net', defined
previously patched into 2.6.29.
--- linux-2.6.32-rc8/net/ipv4/ip_fragment.c.orig 2009-09-09
18:13:59.000000000 -0400
+++ linux-2.6.32-rc8/net/ipv4/ip_fragment.c 2009-11-26
05:02:43.000000000 -0500
@@ -563,7 +563,7 @@
printk(KERN_INFO "Oversized IP packet from %pI4.\n",
&qp->saddr);
out_fail:
- IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_REASMFAILS);
+ IP_INC_STATS_BH(net, IPSTATS_MIB_REASMFAILS);
return err;
}
Signed-off-by: David Ford <david [at] blue-labs>
Between 2.6.28.10 and 2.6.29, net/ipv4/ip_fragment.c was patched,
changing from dev_net(dev) to container_of(...). Unfortunately the goto
section (out_fail) on oversized packets inside ip_frag_reasm() didn't
get touched up as well. Oversized IP packets cause a NULL pointer
dereference and immediate hang.
I discovered this running openvasd and my previous email on this is
titled: NULL pointer dereference at 2.6.32-rc8:net/ipv4/ip_fragment.c:566
-david
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