From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 668D4C43381 for ; Thu, 21 Mar 2019 16:18:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4072D218D8 for ; Thu, 21 Mar 2019 16:18:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728078AbfCUQSq (ORCPT ); Thu, 21 Mar 2019 12:18:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34664 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727138AbfCUQSq (ORCPT ); Thu, 21 Mar 2019 12:18:46 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EAE77307D973; Thu, 21 Mar 2019 16:18:45 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.43.17.32]) by smtp.corp.redhat.com (Postfix) with SMTP id 8D92E60BF2; Thu, 21 Mar 2019 16:18:43 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Thu, 21 Mar 2019 17:18:44 +0100 (CET) Date: Thu, 21 Mar 2019 17:18:41 +0100 From: Oleg Nesterov To: syzbot Cc: acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, namhyung@kernel.org, peterz@infradead.org, ravi.bangoria@linux.ibm.com, rostedt@goodmis.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com Subject: Re: general protection fault in delayed_uprobe_remove Message-ID: <20190321161841.GA12297@redhat.com> References: <000000000000ec1b3805799d0a56@google.com> <000000000000737c07058498aea1@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000737c07058498aea1@google.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Thu, 21 Mar 2019 16:18:46 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org iiuc, #syz fix: Uprobes: Fix kernel oops with delayed_uprobe_remove() On 03/21, syzbot wrote: > > syzbot has bisected this bug to: > > commit a6ca88b241d5e929e6e60b12ad8cd288f0ffa256 > Author: Song Liu > Date: Tue Oct 2 05:36:36 2018 +0000 > > trace_uprobe: support reference counter in fd-based uprobe > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12c86993200000 > start commit: a6ca88b2 trace_uprobe: support reference counter in fd-bas.. > git tree: linux-next > final crash: https://syzkaller.appspot.com/x/report.txt?x=11c86993200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=16c86993200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=2a22859d870756c1 > dashboard link: https://syzkaller.appspot.com/bug?extid=eab6e18f95a9fe69005e > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137174f5400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1278485d400000 > > Reported-by: syzbot+eab6e18f95a9fe69005e@syzkaller.appspotmail.com > Fixes: a6ca88b241d5 ("trace_uprobe: support reference counter in fd-based > uprobe")