netdev - Re: 3.5.1 fib_rules

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Message-ID: <20120820172240.GA378@redhat.com>
Date:	Mon, 20 Aug 2012 13:22:40 -0400
From:	Dave Jones <davej@...hat.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org,
	Fedora Kernel Team <kernel-team@...oraproject.org>
Subject: Re: 3.5.1 fib_rules_lookup oops

On Mon, Aug 20, 2012 at 06:59:39PM +0200, Eric Dumazet wrote:
 > On Mon, 2012-08-20 at 12:44 -0400, Dave Jones wrote:
 > > Just had a user report this, which I don't think I've seen reported here yet.
 > > Something new, or just something missing from -stable ?
 > > 
 > > 	Dave
 > > 
 > > 
 > > BUG: unable to handle kernel paging request at 5f726571
 > > IP: [<c0884808>] fib_rules_lookup+0x38/0x130
 > > *pdpt = 000000002b8ef001 *pde = 0000000000000000 
 > > Oops: 0000 [#1] SMP 
 > 
 > It looks like a buffer overflow or memory reuse
 > 
 > 5f726565 is not a valid pointer, but ASCII "eer_"

Yeah.

Same user reported a slew of other problems, so he may have bad hardware.
I've asked him to run a memtest to rule that out.

	Dave


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