linux-kernel - Re: [PATCH] ipc,shm: disable shmmax and shmall by default

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: <1397249287.2503.24.camel@buesod1.americas.hpqcorp.net>
Date:	Fri, 11 Apr 2014 13:48:07 -0700
From:	Davidlohr Bueso <davidlohr@...com>
To:	Manfred Spraul <manfred@...orfullife.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>, aswin@...com,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Greg Thelen <gthelen@...gle.com>,
	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH] ipc,shm: disable shmmax and shmall by default

On Fri, 2014-04-11 at 13:27 -0700, Davidlohr Bueso wrote:
> On Fri, 2014-04-11 at 20:28 +0200, Manfred Spraul wrote:
> > Your patch disables checking shmmax, shmall *AND* checking for SHMMIN.
> 
> Right, if shmmax is 0, then there's no point checking for shmmin,
> otherwise we'd always end up returning EINVAL.

Actually that's complete bogus.

Now that I think of it, shmget(key, 0, flg) should still return EINVAL.
That has *nothing* to do with any limits we are changing here and is
simply wrong since the passed size still cannot be less than 1 (shmmin).
I'll update the patch, thanks for pointing this out.

--
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/