Re: [andrewg@tasmail.com: remote memory reading through tcp/icmp]
Dave Jones (davej@suse.de)
Mon, 21 Jan 2002 03:12:11 +0100
On Sun, Jan 20, 2002 at 05:52:04PM -0800, David S. Miller wrote:
> Pretty simple to fix, from Andi Kleen:
>
> --- linux-work/net/ipv4/icmp.c-o Tue Jan 15 11:05:17 2002
> +++ linux-work/net/ipv4/icmp.c Sun Jan 20 23:31:29 2002
> @@ -495,7 +495,7 @@
> icmp_param.data.icmph.checksum=0;
> icmp_param.csum=0;
> icmp_param.skb=skb_in;
> - icmp_param.offset=skb_in->nh.raw - skb_in->data;
> + icmp_param.offset=skb_in->data - skb_in->nh.raw;
With this fix, I'm seeing lots of really strange things happen.
When eth0 comes up, the box slows down to a crawl.
5 minutes later when it gets to starting NIS, the
broadcast address is bombed with portmap connections.
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
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