From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752803AbeDLJpD (ORCPT ); Thu, 12 Apr 2018 05:45:03 -0400 Received: from mail-io0-f199.google.com ([209.85.223.199]:52388 "EHLO mail-io0-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751931AbeDLJpB (ORCPT ); Thu, 12 Apr 2018 05:45:01 -0400 X-Google-Smtp-Source: AIpwx4/EKbtNXIUOO1pOvPkxmv1bEcHp9QZKaJ8A1jnn3rYbuuD1xg+GcQ4WsWmVmM3kQwM+AbRQrFwfZEHwGhKSuxSTQspEyVJE MIME-Version: 1.0 Date: Thu, 12 Apr 2018 02:45:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <883d24f79ad8fd475f0569a39ba6@google.com> Subject: general protection fault in vmx_vcpu_run From: syzbot To: hpa@zytor.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com, rkrcmar@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org 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 b284d4d5a6785f8cd07eda2646a95782373cd01e (Tue Apr 10 19:25:30 2018 +0000) Merge tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=cc483201a3c6436d3550 So far this crash happened 2 times on upstream. Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5622460745515008 Kernel config: https://syzkaller.appspot.com/x/.config?id=-1223000601505858474 compiler: gcc (GCC) 8.0.1 20180301 (experimental) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+cc483201a3c6436d3550@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. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 6155 Comm: syz-executor1 Not tainted 4.16.0+ #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vmx_vcpu_run+0x95f/0x25f0 arch/x86/kvm/vmx.c:9746 RSP: 0018:ffff8801ac217368 EFLAGS: 00010002 RAX: ffffed003725a3a0 RBX: ffff8801c751ab00 RCX: 1ffff10035842e78 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff8801b92d1cf8 RBP: ffff8801db107a18 R08: ffffed003725a3a0 R09: ffffed003725a39f R10: ffffed003725a39f R11: ffff8801b92d1cfb R12: ffff8801b92d1c20 R13: 1ffff1003b620f2a R14: ffff8801d7448300 R15: ffff8801c751ab90 FS: 00007f47f8675700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001b0d04000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: save_stack+0xa9/0xd0 mm/kasan/kasan.c:454 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 slab_post_alloc_hook mm/slab.h:444 [inline] slab_alloc mm/slab.c:3392 [inline] kmem_cache_alloc+0x11b/0x760 mm/slab.c:3552 getname_flags+0xd0/0x5a0 fs/namei.c:140 getname+0x19/0x20 fs/namei.c:211 do_sys_open+0x38e/0x770 fs/open.c:1087 SYSC_openat fs/open.c:1120 [inline] SyS_openat+0x30/0x40 fs/open.c:1114 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x455259 RSP: 002b:00007f47f8674c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f47f86756d4 RCX: 0000000000455259 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000042f R14: 00000000006f9508 R15: 0000000000000000 Code: 8b a9 68 03 00 00 4c 8b b1 70 03 00 00 4c 8b b9 78 03 00 00 48 8b 89 08 03 00 00 75 05 0f 01 c2 eb 03 0f 01 c3 48 89 4c 24 08 59 <0f> 96 81 88 56 00 00 48 89 81 00 03 00 00 48 89 99 18 03 00 00 RIP: vmx_vcpu_run+0x95f/0x25f0 arch/x86/kvm/vmx.c:9746 RSP: ffff8801ac217368 ---[ end trace c157ab9734a00941 ]--- --- 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 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.