From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753422AbeDSP5D (ORCPT ); Thu, 19 Apr 2018 11:57:03 -0400 Received: from mail-io0-f200.google.com ([209.85.223.200]:35827 "EHLO mail-io0-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752679AbeDSP5C (ORCPT ); Thu, 19 Apr 2018 11:57:02 -0400 X-Google-Smtp-Source: AIpwx4/GNNzKN/OgLy8OK/iwb/Mi+ELvkoKfiA+t2r0JXk2fUkKPq+nGaQGMQYOo3dwbCsw3P5ZJfG6D0IYM/QoUBUvEKMZOwIAB MIME-Version: 1.0 Date: Thu, 19 Apr 2018 08:57:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004ccb0e056a359f77@google.com> Subject: WARNING: kernel stack frame pointer has bad value From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot hit the following crash on upstream commit 48023102b7078a6674516b1fe0d639669336049d (Fri Apr 13 23:55:41 2018 +0000) Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=37035ccfa9a0a017ffcf So far this crash happened 141 times on net-next, upstream. C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5871698234572800 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=5086177975599104 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5110926181138432 Kernel config: https://syzkaller.appspot.com/x/.config?id=-8852471259444315113 compiler: gcc (GCC) 8.0.1 20180413 (experimental) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+37035ccfa9a0a017ffcf@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. 00000000ed8ccbe7: 0000000000440169 (0x440169) 00000000469f2a79: 0000000000000033 (0x33) 000000004636639d: 0000000000000246 (0x246) 00000000aa65aef8: 00007ffead676158 (0x7ffead676158) 00000000e3ef297c: 000000000000002b (0x2b) WARNING: kernel stack frame pointer at 000000004832711f in syzkaller561281:4479 has bad value 000000006b4f8502 WARNING: kernel stack regs at 0000000089e11b3b in syzkaller561281:4479 has bad 'bp' value 00000000f19a2a3b random: crng init done --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title If you want to test a patch for this bug, please reply with: #syz test: git://repo/address.git branch and provide the patch inline or as an attachment. To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.