linux-kernel - Re: linux-next: Tree for Apr 9 [cpufreq: NULL pointer deref]

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Date:	Tue, 9 Apr 2013 18:57:49 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	cpufreq@...r.kernel.org, Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: linux-next: Tree for Apr 9 [cpufreq: NULL pointer deref]

On Tue, Apr 9, 2013 at 6:51 PM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> On 9 April 2013 21:38, Sedat Dilek <sedat.dilek@...il.com> wrote:
>> With x=3 the system gets in an unuseable state.
>>
>>      root# echo 0 > /sys/devices/system/cpu/cpu3/online
>>
>> I could not write my reply and had to do a hard/cold reboot.
>> The dmesg log I saw looked similiar to my digicam-shot.
>
> Few things i need from you. First is output of cpufreq-info. Then
> all the steps you did to reproduce above? Removed any other cpus?
>
> I am not able to find next-20130326 tag in my repo, only have 23 and 28.
> Can you debug it a bit to find exact line of code causing this issue using
> objdump?
>
> HINT: Documentation/BUG-HUNTING..
>

next-20130326 see...

[1] http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tag/?id=next-20130326

objdump of file?

> Give me line numbers of both of these functions: __cpufreq_governor() and
> __cpufreq_remove_dev().

I must checkout by myself and jump on next-20130326.
Unfortunately, I have it installed but have no binaries and deleted
the branch from my local GIT branch.

Still on the fs/pipe issue from vfs-next :-).
I guess I have a working follow-up patch, still compiling.

- Sedat -
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