syzbot


invalid opcode in kvm_spurious_fault

Status: closed as invalid on 2018/12/31 07:31
Subsystems: kvm
[Documentation on labels]
Reported-by: syzbot+18be0aea55950d3cabe9@syzkaller.appspotmail.com
First crash: 1988d, last: 1988d

Sample crash report:
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop1' (00000000202a2447): kobject_uevent_env
CPU: 0 PID: 29644 Comm: syz-executor5 Not tainted 4.20.0-rc3+ #126
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kvm_spurious_fault+0x9/0x10 arch/x86/kvm/x86.c:353
*** Guest State ***
Code: 45 10 50 e8 69 e3 7c 00 58 5a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 e8 b7 8a 73 00 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 41 54
RSP: 0018:ffff88817c38f3d8 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 1ffff1102f871e7e RCX: ffffc9001025c000
RDX: 0000000000000446 RSI: ffffffff810c0039 RDI: ffff88817c38f410
RBP: ffff88817c38f3d8 R08: ffff8881c3aee080 R09: ffff8881b2a32000
R10: ffffed10365465ff R11: ffff8881b2a32fff R12: ffff88817c38f450
R13: dffffc0000000000 R14: ffff8881b2a32000 R15: 00000001b2a32000
FS:  00007fa896b74700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88817c38f410 CR3: 00000001cbe47000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kvm_fastop_exception+0x503/0x55ae
kobject: 'loop1' (00000000202a2447): fill_kobj_path: path = '/devices/virtual/block/loop1'
 loaded_vmcs_init arch/x86/kvm/vmx.c:2155 [inline]
 alloc_loaded_vmcs+0x7f/0x280 arch/x86/kvm/vmx.c:4790
 vmx_create_vcpu+0x20e/0x25c0 arch/x86/kvm/vmx.c:11523
CR0: actual=0x0000000000050032, shadow=0x0000000000050012, gh_mask=fffffffffffffff7
kobject: 'kvm' (00000000e1f7546d): kobject_uevent_env
 kvm_arch_vcpu_create+0xe5/0x220 arch/x86/kvm/x86.c:8613
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2482 [inline]
 kvm_vm_ioctl+0x472/0x1d60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2985
CR4: actual=0x0000000000002040, shadow=0x0000000000000000, gh_mask=ffffffffffffe871
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa896b73c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa896b746d4
R13: 00000000004bff11 R14: 00000000004d08e0 R15: 00000000ffffffff
Modules linked in:
------------[ cut here ]------------
kernel BUG at arch/x86/kvm/x86.c:353!
invalid opcode: 0000 [#2] PREEMPT SMP KASAN
CPU: 0 PID: 29644 Comm: syz-executor5 Tainted: G      D           4.20.0-rc3+ #126
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kvm_spurious_fault+0x9/0x10 arch/x86/kvm/x86.c:353
Code: 45 10 50 e8 69 e3 7c 00 58 5a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 e8 b7 8a 73 00 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 41 54
RSP: 0018:ffff8881dae07be0 EFLAGS: 00010006
RAX: ffff8881c3aee080 RBX: 1ffff1103b5c0f7f RCX: ffffffff8139cd5c
RDX: 0000000000010000 RSI: ffffffff810c0039 RDI: ffff8881dae07c18
RBP: ffff8881dae07be0 R08: ffff8881c3aee080 R09: ffffed103b5c5b67
R10: ffffed103b5c5b67 R11: ffff8881dae2db3b R12: ffff8881dae07c58
R13: dffffc0000000000 R14: ffff8881bc399000 R15: 00000001bc399000
FS:  00007fa896b74700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8881dae07c18 CR3: 00000001cbe47000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kvm_fastop_exception+0x503/0x55ae
 loaded_vmcs_init arch/x86/kvm/vmx.c:2155 [inline]
 __loaded_vmcs_clear+0x2d6/0x690 arch/x86/kvm/vmx.c:2237
 flush_smp_call_function_queue+0x1d2/0x640 kernel/smp.c:243
 generic_smp_call_function_single_interrupt+0x13/0x2b kernel/smp.c:192
 smp_call_function_single_interrupt+0x12f/0x650 arch/x86/kernel/smp.c:296
 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:826
 </IRQ>
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:771 [inline]
RIP: 0010:preempt_schedule_irq+0xaf/0x140 kernel/sched/core.c:3698
Code: 00 e8 c5 7e 7b f9 e8 60 65 ab f9 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 75 73 48 83 3d fa ad 77 01 00 74 61 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 f7 cd ff ff 41 80 7d 00 00 75 6c 48 83 3d d0 ad
RSP: 0018:ffff88817c38f120 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04
RAX: 1ffffffff12a3f70 RBX: 0000000000000000 RCX: ffffc9001025c000
RDX: 0000000000000000 RSI: ffffffff8185b384 RDI: ffffffff8a166434
RBP: ffff88817c38f148 R08: ffff8881c3aee080 R09: ffffed103b5c59a9
R10: ffffed103b5c59a9 R11: ffff8881dae2cd4b R12: dffffc0000000000
R13: fffffbfff12a3f6f R14: ffffffff8951fb80 R15: ffffffff8951fb78
 retint_kernel+0x1b/0x2d
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline]
RIP: 0010:oops_end+0x69/0x100 arch/x86/kernel/dumpstack.c:343
Code: 05 98 3b 22 08 ff ff ff ff e8 13 36 1c 00 83 2d 74 42 25 09 01 74 69 48 83 3d b2 46 25 08 00 0f 84 8c 00 00 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 ad 3d 1c 00 be 02 00 00 00 48 c7 c7 40 f7 51 8a
RSP: 0018:ffff88817c38f200 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: 0000000000040000 RBX: 0000000000000286 RCX: ffffc9001025c000
RDX: 0000000000040000 RSI: ffffffff8148eae9 RDI: 0000000000000286
RBP: ffff88817c38f218 R08: ffff8881c3aee080 R09: fffffbfff142cc86
R10: fffffbfff142cc86 R11: ffffffff8a166437 R12: 000000000000000b
R13: ffff88817c38f328 R14: 0000000000000000 R15: ffff88817c38f328
 die+0x3d/0x46 arch/x86/kernel/dumpstack.c:405
 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
 do_trap+0x1ad/0x250 arch/x86/kernel/traps.c:250
 do_error_trap+0xd6/0x200 arch/x86/kernel/traps.c:277
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:kvm_spurious_fault+0x9/0x10 arch/x86/kvm/x86.c:353
Code: 45 10 50 e8 69 e3 7c 00 58 5a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 e8 b7 8a 73 00 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 41 54
RSP: 0018:ffff88817c38f3d8 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 1ffff1102f871e7e RCX: ffffc9001025c000
RDX: 0000000000000446 RSI: ffffffff810c0039 RDI: ffff88817c38f410
RBP: ffff88817c38f3d8 R08: ffff8881c3aee080 R09: ffff8881b2a32000
R10: ffffed10365465ff R11: ffff8881b2a32fff R12: ffff88817c38f450
R13: dffffc0000000000 R14: ffff8881b2a32000 R15: 00000001b2a32000
 kvm_fastop_exception+0x503/0x55ae
 loaded_vmcs_init arch/x86/kvm/vmx.c:2155 [inline]
 alloc_loaded_vmcs+0x7f/0x280 arch/x86/kvm/vmx.c:4790
 vmx_create_vcpu+0x20e/0x25c0 arch/x86/kvm/vmx.c:11523
 kvm_arch_vcpu_create+0xe5/0x220 arch/x86/kvm/x86.c:8613
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2482 [inline]
 kvm_vm_ioctl+0x472/0x1d60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2985
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa896b73c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa896b746d4
R13: 00000000004bff11 R14: 00000000004d08e0 R15: 00000000ffffffff
Modules linked in:
---[ end trace ddf453f5289a1536 ]---
RIP: 0010:kvm_spurious_fault+0x9/0x10 arch/x86/kvm/x86.c:353
Code: 45 10 50 e8 69 e3 7c 00 58 5a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 e8 b7 8a 73 00 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 41 54
RSP: 0018:ffff88817c38f3d8 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 1ffff1102f871e7e RCX: ffffc9001025c000
RDX: 0000000000000446 RSI: ffffffff810c0039 RDI: ffff88817c38f410
RBP: ffff88817c38f3d8 R08: ffff8881c3aee080 R09: ffff8881b2a32000
R10: ffffed10365465ff R11: ffff8881b2a32fff R12: ffff88817c38f450
R13: dffffc0000000000 R14: ffff8881b2a32000 R15: 00000001b2a32000
FS:  00007fa896b74700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8881dae07c18 CR3: 00000001cbe47000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/11/24 21:33 upstream 7c98a4261827 ecc7c870 .config console log report ci-upstream-kasan-gce-smack-root
* Struck through repros no longer work on HEAD.