linux-kernel - Re: Serial related oops

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Message-ID: <45DC5D57.4020507@inov.pt>
Date:	Wed, 21 Feb 2007 14:55:19 +0000
From:	Jose Goncalves <jose.goncalves@...v.pt>
To:	Frederik Deweerdt <deweerdt@...e.fr>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: Serial related oops

Jose Goncalves wrote:
> New devolpments.
> I have upgraded to 2.6.16.41, applied a patch sent by Frederik that
> removed the changed made in http://lkml.org/lkml/2005/6/23/266 and
> activated some more kernel debug, i.e., CONFIG_KALLSYMS_ALL,
> CONFIG_DEBUG_KERNEL, CONFIG_DETECT_SOFTLOCKUP, CONFIG_DEBUG_SLAB,
> CONFIG_DEBUG_MUTEXES, CONFIG_FRAME_POINTER and CONFIG_FORCED_INLINING
> (thanks to vda for pointing me to the right doc.).
> At first it seemed to work fine, but after some days of continuous
> running I've got another kernel Oops!
> I attach the dmesg output and the assembly dump of serial8250_startup()
> and serial8250_shutdown().
>   

And also the assembly dump of serial_in() were the NULL pointer
dereference happens.

José Gonçalves


View attachment "objdump2.txt" of type "text/plain" (2136 bytes)