linux-kernel - Re: [ 00/34] 3.4.59-stable review

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Date:	Mon, 19 Aug 2013 16:22:59 -0600
From:	Shuah Khan <shuah.kh@...sung.com>
To:	Stefan Lippers-Hollmann <s.L-H@....de>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Shuah Khan <shuah.kh@...sung.com>, shuahkhan@...il.com
Subject: Re: [ 00/34] 3.4.59-stable review

On 08/19/2013 02:14 PM, Stefan Lippers-Hollmann wrote:
> Hi
>
> On Monday 19 August 2013, Greg Kroah-Hartman wrote:
>> On Mon, Aug 19, 2013 at 12:02:17PM -0600, Shuah Khan wrote:
>>> On 08/18/2013 02:34 PM, Greg Kroah-Hartman wrote:
> […]
>>> and the following traces in dmesg:
>>> [  124.802169] init: udevtrigger post-stop process (353) terminated
>>> with status 1
>>> [  243.439212] INFO: task crda:723 blocked for more than 120 seconds.
>>
>> What is "crda"?
>>
>> Any luck with bisection?  It should go fast as the majority of patches
>> here are non-x86.
>
> crda is a userspace helper, invoked by udev events, which sets -and
> intersects as needed- the regulatory domain settings for (modern,
> cfg80211 based) wlan hardware based on the device's EEPROM regdom hint,
> local configuration (country code) and eventual IEEE 802.11d hints
> (country IEs) beaconed by access points nearby. It hooks into udev with
> these udev rules (Debian/ 1.1.2-1):
>
> $ grep -v -e ^$ -e ^\# /lib/udev/rules.d/60-crda.rules
> SUBSYSTEM=="ieee80211", ACTION=="add", RUN+="/lib/crda/setregdomain"
>
> $ grep -v -e ^$ -e ^\# /lib/udev/rules.d/85-regulatory.rules
> KERNEL=="regulatory*", ACTION=="change", SUBSYSTEM=="platform", RUN+="/sbin/crda"
>
> Full source is at [2], it should be installed on pretty much every
> distro/ system released with wlan support for the last >>3 years.
>
> There are two iwl4965 patches in this series, which might be among the
> first ones to check - /if/ you actually have that hardware, the second
> one (iwl4965: reset firmware after rfkill off) might also indirectly
> have an effect on blutetooth (via rfkill).
>
> Regards
> 	Stefan Lippers-Hollmann
>
> [1]	http://wireless.kernel.org/en/developers/Regulatory/CRDA
> [2]	https://github.com/mcgrof/crda
>

Greg,

git bisect shows the following patch as the problem:

[ 26/34] genetlink: fix family dump race


-- Shuah

-- 
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@...sung.com | (970) 672-0658
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