linux-kernel - Re: General protection fault when unloading snd_hda

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Message-ID: <20090411143950.3429ebc0@infradead.org>
Date:	Sat, 11 Apr 2009 14:39:50 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Carlos R. Mafra" <crmafra2@...il.com>
Cc:	linux-kernel@...r.kernel.org, tiwai@...e.de,
	alsa-devel@...r.kernel.org
Subject: Re: General protection fault when unloading snd_hda_intel on
 2.6.30-rc1+

On Sat, 11 Apr 2009 23:03:36 +0200
"Carlos R. Mafra" <crmafra2@...il.com> wrote:

> From: "Carlos R. Mafra" <crmafra2@...il.com>
> To: Arjan van de Ven <arjan@...radead.org>
> Cc: linux-kernel@...r.kernel.org, tiwai@...e.de,
> alsa-devel@...r.kernel.org Subject: Re: General protection fault when
> unloading snd_hda_intel on 2.6.30-rc1+ Date: Sat, 11 Apr 2009
> 23:03:36 +0200 User-Agent: Mutt/1.5.18 (2008-05-17)
> 
> On Sat 11.Apr'09 at 13:20:33 -0700, Arjan van de Ven wrote:
>  [...]
  
  
 	asm volatile("bt %2,%1\n\t" 
*ffffffff8044bf90:	0f a3 77 20          	bt     %esi,0x20(%rdi) |  %edi = 697665646632785c  %esi = 5 <--- faulting instruction
 ffffffff8044bf94:	19 c0                	sbb    %eax,%eax 
 static struct input_handler *input_table[8]; 
  
 static inline int is_event_supported(unsigned int code, 
 				     unsigned long *bm, unsigned int max) 
 { 
 	return code <= max && test_bit(code, bm); 
 ffffffff8044bf96:	85 c0                	test   %eax,%eax 
 ffffffff8044bf98:	74 e0                	je     ffffffff8044bf7a <input_event+0x2a> 
 { 
 	unsigned long flags; 
  
 	if (is_event_supported(type, dev->evbit, EV_MAX)) { 




so... "dev" is pointing evbit at... 697665646632785 which looks like grabage.

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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