linux-kernel - Re: ipc-msg broken again on 3.11-rc7?

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Date:	Mon, 2 Sep 2013 04:58:22 +0000
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Davidlohr Bueso <dave.bueso@...il.com>,
	Sedat Dilek <sedat.dilek@...il.com>,
	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?

On 08/31/2013 11:20 PM, Linus Torvalds wrote:
> Vineet, actual patch for what Davidlohr suggests attached. Can you try it?
>
>              Linus

Apologies for late in getting back to this - I was away from my computer for a bit.

Unfortunately, with a quick test, this patch doesn't help.
FWIW, this is latest mainline (.config attached).

Let me know what diagnostics I can add to help with this.

-Vineet

>
> On Fri, Aug 30, 2013 at 9:31 AM, Davidlohr Bueso <dave.bueso@...il.com> wrote:
>> After a quick glance, I suspect that the problem might be because we
>> are calling security_msg_queue_msgsnd() without taking the lock. This
>> is similar to the issue Sedat reported in the original thread with
>> find_msg() concerning msgrcv.


View attachment "ATT53981.config" of type "text/plain" (25153 bytes)