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[195.135.220.15]) by mx.google.com with ESMTPS id o4si2453085eda.121.2019.03.27.15.49.54 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 27 Mar 2019 15:49:54 -0700 (PDT) Received-SPF: pass (google.com: domain of dsterba@suse.cz designates 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=pass (google.com: domain of dsterba@suse.cz designates 195.135.220.15 as permitted sender) smtp.mailfrom=dsterba@suse.cz 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) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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.