From: Joshua Kinard <kumba@gentoo.org>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: Linux MIPS List <linux-mips@linux-mips.org>
Subject: Re: Unhandled kernel unaligned access on IP32 w/ network I/O && 3.7.1?
Date: Fri, 28 Dec 2012 18:37:45 -0500 [thread overview]
Message-ID: <50DE2D49.1000603@gentoo.org> (raw)
In-Reply-To: <20121228215225.GC6786@linux-mips.org>
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On 12/28/2012 4:52 PM, Ralf Baechle wrote:
> On Thu, Dec 27, 2012 at 11:27:37PM -0500, Joshua Kinard wrote:
>
>> Has anyone run into an unhandled kernel unaligned access under 3.7.1? I've
>> triggered it twice w/ network I/O on an SGI IP32 machine, however, the stack
>> trace does not appear to be specific to any of IP32's own drivers. 3.6.7
>> was very stable, and the two oopses I've triggered so far both happened
>> under 3.7.1.
>>
>> It looks like the culprit is in sk_stream_alloc_skb or tcp_sendmsg, however,
>> I have little experience in the higher-level networking stack within Linux
>> and wanted to see if anyone else has triggered this on other MIPS systems.
>>
>> Seems to happen when I am logged in via SSH (on IPv6) and generating a burst
>> of console output.
>>
>> Unhandled kernel unaligned access[#3]:
>> Cpu 0
>> $ 0 : 0000000000000000 0000000000000010 0000000000000000 bfffff005671271c
>> $ 4 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000
>> $ 8 : 980000005c24e000 0000000000000000 980000005c24e000 00000000000000cc
>> $12 : ffffffff9001fce1 000000001000001e fffffffffffff000 000000000000001f
>> $16 : 980000005c00fa40 ffffffffde0300b8 ffffff0000000000 0000000000000005
>> $20 : 000000007f875700 00000000000005a8 0000000000000008 0000000000000005
>> $24 : 0000000000000001 00000000000003f0
>> $28 : 980000005c00c000 980000005c00fa10 0000000000000000 ffffffff800059a0
>> Hi : 0000000007a11c93
>> Lo : b645a1cac992645e
>> epc : ffffffff8000b700 do_ade+0x1b0/0x480
>> Tainted: G D
> ^^^
>
> This kernel has already oopsed before. Which means this oops message is
> pretty much worthless.
>
> Ralf
I'll try to recapture it over the weekend. This was the only output left in
the serial console buffer when I reattached, as I had the console
disconnected when it happened. Thanks!
--
Joshua Kinard
Gentoo/MIPS
kumba@gentoo.org
4096R/D25D95E3 2011-03-28
"The past tempts us, the present confuses us, the future frightens us. And
our lives slip away, moment by moment, lost in that vast, terrible in-between."
--Emperor Turhan, Centauri Republic
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next prev parent reply other threads:[~2012-12-28 23:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-28 4:27 Unhandled kernel unaligned access on IP32 w/ network I/O && 3.7.1? Joshua Kinard
2012-12-28 21:52 ` Ralf Baechle
2012-12-28 23:37 ` Joshua Kinard [this message]
2012-12-30 8:23 ` Joshua Kinard
2013-01-01 3:25 ` Joshua Kinard
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