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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 C21CFC43381 for ; Thu, 21 Mar 2019 16:26:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8B9CD21916 for ; Thu, 21 Mar 2019 16:26:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728305AbfCUQ0p (ORCPT ); Thu, 21 Mar 2019 12:26:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:50532 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726787AbfCUQ0p (ORCPT ); Thu, 21 Mar 2019 12:26:45 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5FED2218E2; Thu, 21 Mar 2019 16:26:43 +0000 (UTC) Date: Thu, 21 Mar 2019 12:26:42 -0400 From: Steven Rostedt To: Oleg Nesterov Cc: syzbot , 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, songliubraving@fb.com, syzkaller-bugs@googlegroups.com Subject: Re: general protection fault in delayed_uprobe_remove Message-ID: <20190321122642.51dd7ed0@gandalf.local.home> In-Reply-To: <20190321161841.GA12297@redhat.com> References: <000000000000ec1b3805799d0a56@google.com> <000000000000737c07058498aea1@google.com> <20190321161841.GA12297@redhat.com> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 21 Mar 2019 17:18:41 +0100 Oleg Nesterov wrote: > iiuc, > > #syz fix: Uprobes: Fix kernel oops with delayed_uprobe_remove() Thanks, because I haven't been able to reproduce this, and couldn't see how it could bug like it did by looking at the current code. -- Steve > > 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")