From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: general protection fault in vcpu_enter_guest Date: Wed, 15 Aug 2018 09:35:03 -0700 Message-ID: <0000000000008c6a4305737be8a4@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes 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 Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 4110b42356f3 Add linux-next specific files for 20180810 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=158a6f54400000 kernel config: https://syzkaller.appspot.com/x/.config?x=1d80606e3795a4f5 dashboard link: https://syzkaller.appspot.com/bug?extid=a7d2d21d5cbb86bfd129 compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+a7d2d21d5cbb86bfd129@syzkaller.appspotmail.com 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 CPU: 1 PID: 12684 Comm: syz-executor6 Not tainted 4.18.0-rc8-next-20180810+ #36 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvm_apic_hw_enabled arch/x86/kvm/lapic.h:169 [inline] RIP: 0010:vcpu_scan_ioapic arch/x86/kvm/x86.c:7243 [inline] RIP: 0010:vcpu_enter_guest+0x51f9/0x6360 arch/x86/kvm/x86.c:7389 Code: 80 3c 02 00 0f 85 79 11 00 00 4c 8b a3 e0 03 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 88 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 45 11 00 00 4d 8b a4 24 88 00 00 00 48 b8 00 00 RSP: 0018:ffff88019465f4f0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88018fb40200 RCX: ffffc90004417000 RDX: 0000000000000011 RSI: ffffffff810eb6b7 RDI: 0000000000000088 RBP: ffff88019465f840 R08: ffff8801b2b2c6c0 R09: 0000000000000001 R10: ffff88019465f860 R11: 97ac495aab52485c R12: 0000000000000000 R13: 0000000002814001 R14: dffffc0000000000 R15: ffff88018fb40230 FS: 00007f75b27a9700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001b8e7d0 CR3: 00000001aebfc000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vcpu_run arch/x86/kvm/x86.c:7660 [inline] kvm_arch_vcpu_ioctl_run+0x33e/0x1690 arch/x86/kvm/x86.c:7837 kvm_vcpu_ioctl+0x7b8/0x1300 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2590 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f75b27a8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f75b27a96d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004ceb90 R14: 00000000004c54c9 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace e6eaa75019e681cb ]--- RIP: 0010:kvm_apic_hw_enabled arch/x86/kvm/lapic.h:169 [inline] RIP: 0010:vcpu_scan_ioapic arch/x86/kvm/x86.c:7243 [inline] RIP: 0010:vcpu_enter_guest+0x51f9/0x6360 arch/x86/kvm/x86.c:7389 Code: 80 3c 02 00 0f 85 79 11 00 00 4c 8b a3 e0 03 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 88 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 45 11 00 00 4d 8b a4 24 88 00 00 00 48 b8 00 00 RSP: 0018:ffff88019465f4f0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88018fb40200 RCX: ffffc90004417000 RDX: 0000000000000011 RSI: ffffffff810eb6b7 RDI: 0000000000000088 RBP: ffff88019465f840 R08: ffff8801b2b2c6c0 R09: 0000000000000001 R10: ffff88019465f860 R11: 97ac495aab52485c R12: 0000000000000000 netlink: 28 bytes leftover after parsing attributes in process `syz-executor5'. R13: 0000000002814001 R14: dffffc0000000000 R15: ffff88018fb40230 FS: 00007f75b27a9700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001b8e7d0 CR3: 00000001aebfc000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 IPVS: set_ctl: invalid protocol: 59 172.20.20.20:20003 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.