linux-kernel - Re: [PATCH 3/4] ipc/shm.c: check for integer overflow during shmget.

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Message-ID: <1398190745.2473.10.camel@buesod1.americas.hpqcorp.net>
Date:	Tue, 22 Apr 2014 11:19:05 -0700
From:	Davidlohr Bueso <davidlohr@...com>
To:	Manfred Spraul <manfred@...orfullife.com>
Cc:	Davidlohr Bueso <davidlohr.bueso@...com>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	gthelen@...gle.com, aswin@...com, linux-mm@...ck.org
Subject: Re: [PATCH 3/4] ipc/shm.c: check for integer overflow during shmget.

On Mon, 2014-04-21 at 16:26 +0200, Manfred Spraul wrote:
> SHMMAX is the upper limit for the size of a shared memory segment,
> counted in bytes. The actual allocation is that size, rounded up to
> the next full page.
> Add a check that prevents the creation of segments where the
> rounded up size causes an integer overflow.
> 
> Signed-off-by: Manfred Spraul <manfred@...orfullife.com>

Acked-by: Davidlohr Bueso <davidlohr@...com>

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