netdev - Re: [PANIC] lro + iscsi or lro + skb text search causes panic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4979097B.4040108@cs.wisc.edu>
Date:	Thu, 22 Jan 2009 18:04:11 -0600
From:	Mike Christie <michaelc@...wisc.edu>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	netdev@...r.kernel.org, olaf.kirch@...cle.com, tgraf@...g.ch,
	kkeil@...e.de, "David S. Miller" <davem@...emloft.net>
Subject: Re: [PANIC] lro + iscsi or lro + skb text search causes panic

Herbert Xu wrote:
> On Thu, Jan 22, 2009 at 12:55:21PM -0800, Brandeburg, Jesse wrote:
>> I've filed this bugzilla a while ago.
>> http://bugzilla.kernel.org/show_bug.cgi?id=11804
>> now other customers are becoming interested as well
> 
> Does this patch help?
> 
> net: Fix frag_list handling in skb_seq_read
> 
> The frag_list handling was broken ini skb_seq_read:
> 
> 1) We didn't add the stepped offset when looking at the head
> are of fragments other than the first.
> 
> 2) The frag index wasn't reset.
> 
> This patch fixes both issues.
> 

Without the patch I do not get the oops Jesse saw. The iscsi driver logs 
in and I do not see a problem until running IO (scsi read commands). The 
iscsi code thinks there is a missing packet at the iscsi level and 
begins recovery at that level.

With the patch running against linus's git tree, my box locks up. You 
cannot ping it. I do not get a oops or anything in the logs, and the 
keyboard does not respond. I will try to get some oops output and more info.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html