linux-kernel - Re: ipc-msg broken again on 3.11-rc7? (was Re: linux-next: Tree for Jun 21 [ BROKEN ipc/ipc-msg ])

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: <52205597.3090609@synopsys.com>
Date:	Fri, 30 Aug 2013 13:49:35 +0530
From:	Vineet Gupta <vineetg76@...il.com>
To:	sedat.dilek@...il.com
CC:	linus Torvalds <torvalds@...ux-foundation.org>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	linux-next <linux-next@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm <linux-mm@...ck.org>, Andi Kleen <andi@...stfloor.org>,
	Rik van Riel <riel@...hat.com>,
	Manfred Spraul <manfred@...orfullife.com>,
	Jonathan Gonzalez <jgonzalez@...ets.cl>
Subject: Re: ipc-msg broken again on 3.11-rc7? (was Re: linux-next: Tree for
 Jun 21 [ BROKEN ipc/ipc-msg ])

Ping ?

It seems 3.11 is pretty close to releasing but we stil have LTP msgctl08 causing a
hang (atleast on ARC) for both linux-next 20130829 as well as Linus tree.

So far, I haven't seemed to have drawn attention of people involved.

-Vineet

On 08/29/2013 01:22 PM, Sedat Dilek wrote:
> On Thu, Aug 29, 2013 at 9:21 AM, Vineet Gupta
> <Vineet.Gupta1@...opsys.com> wrote:
>> On 08/29/2013 08:34 AM, Sedat Dilek wrote:
>>> On Wed, Aug 28, 2013 at 1:58 PM, Vineet Gupta
>>> <Vineet.Gupta1@...opsys.com> wrote:
>>>> Hi David,
>>>>

[....]

>>>> LTP msgctl08 hangs on 3.11-rc7 (ARC port) with some of my local changes. I
>>>> bisected it, sigh... didn't look at this thread earlier :-( and landed into this.
>>>>
>>>> ------------->8------------------------------------
>>>> 3dd1f784ed6603d7ab1043e51e6371235edf2313 is the first bad commit
>>>> commit 3dd1f784ed6603d7ab1043e51e6371235edf2313
>>>> Author: Davidlohr Bueso <davidlohr.bueso@...com>
>>>> Date:   Mon Jul 8 16:01:17 2013 -0700
>>>>
>>>>     ipc,msg: shorten critical region in msgsnd
>>>>
>>>>     do_msgsnd() is another function that does too many things with the ipc
>>>>     object lock acquired.  Take it only when needed when actually updating
>>>>     msq.
>>>> ------------->8------------------------------------
>>>>
>>>> If I revert 3dd1f784ed66 and 9ad66ae "ipc: remove unused functions" - the test
>>>> passes. I can confirm that linux-next also has the issue (didn't try the revert
>>>> there though).
>>>>
>>>> 1. arc 3.11-rc7 config attached (UP + PREEMPT)
>>>> 2. dmesg prints "msgmni has been set to 479"
>>>> 3. LTP output (this is slightly dated source, so prints might vary)
>>>>
>>>> ------------->8------------------------------------
>>>> <<<test_start>>>
>>>> tag=msgctl08 stime=1377689180
>>>> cmdline="msgctl08"
>>>> contacts=""
>>>> analysis=exit
>>>> initiation_status="ok"
>>>> <<<test_output>>>
>>>> ------------->8-------- hung here ------------------
>>>>
>>>>
>>>> Let me know if you need more data/test help.
>>>>
>>> Cannot say much to your constellation as I had the issue on x86-64 and
>>> Linux-next.
>>> But I have just seen a post-v3.11-rc7 IPC-fix in [1].
>>>
>>> I have here a v3.11-rc7 kernel with drm-intel-nightly on top... did not run LTP.
>>
>> Not sure what you mean - I'd posted that Im seeing the issue on ARC Linux (an FPGA
>> board) 3.11-rc7 as well as linux-next of yesterday.
>>
> 
> I am not saying there is no issue, but I have no possibility to test
> for ARC arch.
> 
>>> Which LTP release do you use?
>>
>> The LTP build I generally use is from a 2007 based sources (lazy me). However I
>> knew this would come up so before posting, I'd built the latest from buildroot and
>> ran the msgctl08 from there standalone and it did the same thing.
>>
> 
> Try always latest LTP-stable (03-May-2013 is what I tried). AFAICS a
> new release is planned soon.
> 
>>> Might be good to attach your kernel-config for followers?
>>
>> It was already there in my orig msg - you probably missed it.
>>
> 
> I have got that response from you only :-).
> 
>>> [1] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=368ae537e056acd3f751fa276f48423f06803922
>>
>> I tried linux-next of today, same deal - msgctl08 still hangs.
>>
> 
> That above fix [1] in Linus-tree is also in next-20130828.
> 
> Hope Davidlohr and fellows can help you.
> 
> - Sedat -
> 

--
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/