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

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Date:	Tue, 22 Apr 2014 13:16:38 -0700
From:	Motohiro Kosaki <Motohiro.Kosaki@...fujitsu.com>
To:	Davidlohr Bueso <davidlohr@...com>,
	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>,
	Motohiro Kosaki JP <kosaki.motohiro@...fujitsu.com>,
	"gthelen@...gle.com" <gthelen@...gle.com>,
	"aswin@...com" <aswin@...com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: RE: [PATCH 3/4] ipc/shm.c: check for integer overflow during shmget.

> > 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>

Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>