linux-kernel - Re: [3.15-rc3] BUG: null ptr dereference in ichx_gpio_request

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Message-ID: <536A4454.5020404@hurleysoftware.com>
Date:	Wed, 07 May 2014 10:33:56 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Vincent Donnefort <vdonnefort@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>
CC:	Lee Jones <lee.jones@...aro.org>,
	Linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [3.15-rc3] BUG: null ptr dereference in ichx_gpio_request_regions()

Hi Vincent,

On 05/07/2014 10:05 AM, Vincent Donnefort wrote:
> Hello Peter,

>> This is almost certainly caused by the uninitialized regs ptr
>> in the ich6_desc struct (i3100_desc struct has the same problem)
>> introduced in this commit:
>>
>> commit bb62a35bd5d96e506af0ea8dd145480b9172a2a6
>> Author: Vincent Donnefort <vdonnefort@...il.com>
>> Date:   Fri Feb 14 15:01:56 2014 +0100
>>
>>      gpio: ich: Add support for multiple register addresses
>>
>>      This patch introduces regs and reglen pointers which allow a chipset to have
>>      register addresses differing from ICH ones.
>>
>>      Acked-by: Linus Walleij <linus.walleij@...aro.org>
>>      Signed-off-by: Vincent Donnefort <vdonnefort@...il.com>
>>      Signed-off-by: Lee Jones <lee.jones@...aro.org>
>>
>
> Yes indeed, this must be linked to this thread https://lkml.org/lkml/2014/4/15/292

Thanks for the link.

I searched through LKML but without the driver name or the offending function
in the commit message I couldn't find it.

Linus,

What tree is this bug fix trapped in? I see it didn't make -rc4 either.

Regards,
Peter Hurley
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