linux-kernel - Re: Additional info on modpost segfault

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Message-ID: <4C08A9D0.8000505@suse.cz>
Date:	Fri, 04 Jun 2010 09:22:56 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	alan <alan@...eserver.org>, linux-kernel@...r.kernel.org
Subject: Re: Additional info on modpost segfault

On 4.6.2010 06:51, Américo Wang wrote:
> On Thu, Jun 03, 2010 at 08:10:30PM -0700, alan wrote:
>> Missed adding the actual segfault message:
>>
>>  LD      drivers/usb/built-in.o
>>  LD      drivers/built-in.o
>>  LD      vmlinux.o
>>  MODPOST vmlinux.o
>> /bin/sh: line 1: 20665 Segmentation fault      (core dumped)
>> scripts/mod/modpost -o
>> /home/alan/GitTrees/linux-2.6-mid-ref/Module.symvers -S vmlinux.o
>> make[1]: *** [vmlinux.o] Error 139
>> make: *** [vmlinux.o] Error 2
>>
>> I have looked at the gcc 4.4.4 changelog and I can't see anything
>> that should cause this.
>>
> 
> Hmm, you need to find which program segfaults here.

It's the modpost command run on vmlinux.o. Alan, can you try
$ gdb --args scripts/mod/modpost -o Module.symvers -S vmlinux.o
(gdb) r
(wait for the segfault)
(gdb) bt full

and post the backtrace?

Thanks,
Michal
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