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[209.132.180.67]) by mx.google.com with ESMTP id j187si19767656pfc.251.2019.03.27.15.50.33; Wed, 27 Mar 2019 15:50:49 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728137AbfC0Wt4 (ORCPT + 99 others); Wed, 27 Mar 2019 18:49:56 -0400 Received: from mx2.suse.de ([195.135.220.15]:36878 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727723AbfC0Wt4 (ORCPT ); Wed, 27 Mar 2019 18:49:56 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 81AB7ACCD; Wed, 27 Mar 2019 22:49:53 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 82603DA8D8; Wed, 27 Mar 2019 23:51:03 +0100 (CET) Date: Wed, 27 Mar 2019 23:51:03 +0100 From: David Sterba To: Matthew Wilcox Cc: syzbot , akpm@linux-foundation.org, clm@fb.com, dan.carpenter@oracle.com, dave@stgolabs.net, dhowells@redhat.com, dsterba@suse.com, dvyukov@google.com, ebiederm@xmission.com, jbacik@fb.com, ktkhai@virtuozzo.com, ktsanaktsidis@zendesk.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, manfred@colorfullife.com, mhocko@suse.com, nborisov@suse.com, penguin-kernel@I-love.SAKURA.ne.jp, rppt@linux.vnet.ibm.com, sfr@canb.auug.org.au, shakeelb@google.com, syzkaller-bugs@googlegroups.com, vdavydov.dev@gmail.com Subject: Re: general protection fault in put_pid Message-ID: <20190327225102.GB29086@twin.jikos.cz> Reply-To: dsterba@suse.cz Mail-Followup-To: dsterba@suse.cz, Matthew Wilcox , syzbot , akpm@linux-foundation.org, clm@fb.com, dan.carpenter@oracle.com, dave@stgolabs.net, dhowells@redhat.com, dsterba@suse.com, dvyukov@google.com, ebiederm@xmission.com, jbacik@fb.com, ktkhai@virtuozzo.com, ktsanaktsidis@zendesk.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, manfred@colorfullife.com, mhocko@suse.com, nborisov@suse.com, penguin-kernel@I-love.SAKURA.ne.jp, rppt@linux.vnet.ibm.com, sfr@canb.auug.org.au, shakeelb@google.com, syzkaller-bugs@googlegroups.com, vdavydov.dev@gmail.com References: <00000000000051ee78057cc4d98f@google.com> <000000000000c58fcf058519059e@google.com> <20190327202712.GT10344@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190327202712.GT10344@bombadil.infradead.org> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 27, 2019 at 01:27:12PM -0700, Matthew Wilcox wrote: > On Wed, Mar 27, 2019 at 01:10:01PM -0700, syzbot wrote: > > syzbot has bisected this bug to: > > > > commit b9b8a41adeff5666b402996020b698504c927353 > > Author: Dan Carpenter > > Date: Mon Aug 20 08:25:33 2018 +0000 > > > > btrfs: use after free in btrfs_quota_enable > > Not plausible. Try again. Agreed, grep for 'btrfs' in the console log does not show anything, ie. no messages, slab caches nor functions on the stack.