From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx122.postini.com [74.125.245.122]) by kanga.kvack.org (Postfix) with SMTP id 9C3486B002B for ; Sun, 4 Nov 2012 22:31:53 -0500 (EST) Received: by mail-vc0-f169.google.com with SMTP id fl17so6816410vcb.14 for ; Sun, 04 Nov 2012 19:31:52 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <508086DA.3010600@oracle.com> <5089A05E.7040000@gmail.com> Date: Sun, 4 Nov 2012 19:31:52 -0800 Message-ID: Subject: Re: mm: NULL ptr deref in anon_vma_interval_tree_verify From: Michel Lespinasse Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: Bob Liu Cc: Sasha Levin , Sasha Levin , hughd@google.com, Andrew Morton , linux-mm , "linux-kernel@vger.kernel.org" , Dave Jones On Sun, Nov 4, 2012 at 6:20 PM, Bob Liu wrote: > The loop for each entry of vma->anon_vma_chain in validate_mm() is not > protected by anon_vma lock. > I think that may be the cause. > > Michel, What's your opinion=EF=BC=9F Good catch, I think that's it. Somehow it had not occured to me to verify the checker code - as in, who's checking the checker ? :) --=20 Michel "Walken" Lespinasse A program is never fully debugged until the last user dies. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org