linux-kernel - Re: LTP 20080131 causes defunct processes w/2.6.30-rc1 (possible ptrace issue?)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20090409213910.GB30645@us.ibm.com>
Date:	Thu, 9 Apr 2009 14:39:10 -0700
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	oleg@...hat.com,
	linux-kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: LTP 20080131 causes defunct processes w/2.6.30-rc1 (possible
	ptrace issue?)

Kumar Gala [galak@...nel.crashing.org] wrote:
>
> On Apr 9, 2009, at 2:49 PM, Sukadev Bhattiprolu wrote:
>
>> Kumar Gala [galak@...nel.crashing.org] wrote:
>>>
>>> On Apr 9, 2009, at 10:43 AM, Kumar Gala wrote:
>>>
>>>> I'm seeing some weird behavior in 2.6.30-rc1 that didn't exist in 
>>>> 2.6.29.
>>>> We have a slightly older LTP version (20080131) that we run on some
>>>> embedded PPC boards.  If I run the syscall tests on 2.6.29 things pass 
>>>> as
>>
>> Will try to repro on a normal machine, but can you attach the 
>> /proc/pid/status
>> (and possibly the stack) of the parent of the 'recv01' ?
>
> Name:   recv01
> State:  Z (zombie)
> Tgid:   2449
> Pid:    2449
> PPid:   1

Ok, but I meant the status of the parent (i.e /proc/1/status in this case).

To get the stack, if CONFIG_MAGIC_SYSRQ=y, you can:

	$ echo 1 > /proc/sys/kernel/sysrq
	$ echo t > /proc/sysrq-trigger
	$ dmesg > /tmp/dmesg.out

Look in /tmp/dmesg.out for the process stack

Suka
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/