[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 8.606381] rsyslogd (2869) used greatest stack depth: 14496 bytes left [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-next-kasan-gce-0,10.128.0.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.372156] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.122836] ------------[ cut here ]------------ [ 43.128008] WARNING: CPU: 1 PID: 3224 at arch/x86/kvm/vmx.c:3844 free_loaded_vmcs+0x10f/0x150 [ 43.136695] Kernel panic - not syncing: panic_on_warn set ... [ 43.136695] [ 43.144029] CPU: 1 PID: 3224 Comm: syzkaller595060 Not tainted 4.14.0-rc7-next-20171103+ #38 [ 43.152571] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.161891] Call Trace: [ 43.164455] dump_stack+0x194/0x257 [ 43.168056] ? arch_local_irq_restore+0x53/0x53 [ 43.172722] ? vsnprintf+0x1ed/0x1900 [ 43.176518] panic+0x1e4/0x41c [ 43.179686] ? refcount_error_report+0x214/0x214 [ 43.184412] ? show_regs_print_info+0x65/0x65 [ 43.188886] ? __warn+0x1a9/0x1e0 [ 43.192324] ? free_loaded_vmcs+0x10f/0x150 [ 43.196615] __warn+0x1c4/0x1e0 [ 43.199861] ? free_loaded_vmcs+0x10f/0x150 [ 43.204156] report_bug+0x211/0x2d0 [ 43.207758] fixup_bug+0x40/0x90 [ 43.211094] do_trap+0x260/0x390 [ 43.214438] do_error_trap+0x120/0x390 [ 43.218299] ? do_trap+0x390/0x390 [ 43.221807] ? free_loaded_vmcs+0x10f/0x150 [ 43.226096] ? smp_call_function_single+0x3ae/0x560 [ 43.231089] ? vmx_cpuid_update+0x9a0/0x9a0 [ 43.235387] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.240208] do_invalid_op+0x1b/0x20 [ 43.243893] invalid_op+0x18/0x20 [ 43.247313] RIP: 0010:free_loaded_vmcs+0x10f/0x150 [ 43.252207] RSP: 0018:ffff8801c7f8f470 EFLAGS: 00010293 [ 43.257546] RAX: ffff8801c59a8080 RBX: ffff8801c5b3cdd8 RCX: ffffffff8119c79f [ 43.264794] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801c5b3cde0 [ 43.272033] RBP: ffff8801c7f8f488 R08: ffffea0007182460 R09: 0000000000000000 [ 43.279271] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c6091000 [ 43.286511] R13: 0000000000000001 R14: dffffc0000000000 R15: ffffed0038ff1eb2 [ 43.293761] ? free_loaded_vmcs+0x10f/0x150 [ 43.298064] vmx_free_vcpu+0x1d3/0x2c0 [ 43.301921] kvm_arch_destroy_vm+0x4b4/0x990 [ 43.306303] ? kvm_arch_sync_events+0x30/0x30 [ 43.310770] ? mmdrop+0x18/0x30 [ 43.314019] ? mmu_notifier_unregister+0x437/0x5c0 [ 43.318914] ? kvm_put_kvm+0x306/0xde0 [ 43.322773] ? mmu_notifier_unregister_no_release+0x3e0/0x3e0 [ 43.328628] ? __free_pages+0x107/0x150 [ 43.332579] ? free_unref_page+0x9d0/0x9d0 [ 43.336784] ? quarantine_put+0xeb/0x190 [ 43.340811] ? kfree+0xe4/0x250 [ 43.344058] ? kvm_put_kvm+0x614/0xde0 [ 43.347920] ? free_pages+0x51/0x90 [ 43.351519] kvm_put_kvm+0x695/0xde0 [ 43.355210] ? kvm_clear_guest+0xb0/0xb0 [ 43.359260] ? fsnotify+0x7b3/0x1140 [ 43.362947] ? _raw_spin_unlock_irq+0x27/0x70 [ 43.367412] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.372402] ? kvm_irqfd_release+0xdd/0x120 [ 43.376691] ? kvm_irqfd_release+0xdd/0x120 [ 43.380983] ? kvm_put_kvm+0xde0/0xde0 [ 43.384840] kvm_vm_release+0x42/0x50 [ 43.388610] __fput+0x333/0x7f0 [ 43.391866] ? fput+0x140/0x140 [ 43.395115] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 43.400966] ? _raw_spin_unlock_irq+0x27/0x70 [ 43.405437] ____fput+0x15/0x20 [ 43.408689] task_work_run+0x199/0x270 [ 43.412549] ? task_work_cancel+0x210/0x210 [ 43.416842] ? _raw_spin_unlock+0x22/0x30 [ 43.420962] ? switch_task_namespaces+0x87/0xc0 [ 43.425605] do_exit+0x9b5/0x1ad0 [ 43.429031] ? hrtimer_try_to_cancel+0x21/0x5c0 [ 43.433666] ? mm_update_next_owner+0x930/0x930 [ 43.438306] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 43.443210] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 43.449061] ? _do_fork+0x2f5/0xfe0 [ 43.452656] ? rcu_note_context_switch+0x710/0x710 [ 43.457558] ? fork_idle+0x2d0/0x2d0 [ 43.461243] ? __might_sleep+0x95/0x190 [ 43.465188] ? do_nanosleep+0x4f9/0x6e0 [ 43.469136] ? schedule_timeout_idle+0x90/0x90 [ 43.473699] ? memset+0x31/0x40 [ 43.476956] ? hrtimer_nanosleep+0x2cc/0x860 [ 43.481339] ? nanosleep_copyout+0x100/0x100 [ 43.485713] ? __might_sleep+0x95/0x190 [ 43.489664] ? kasan_check_write+0x14/0x20 [ 43.493869] ? _copy_from_user+0x99/0x110 [ 43.497991] ? __hrtimer_init+0x140/0x140 [ 43.502111] ? syscall_return_slowpath+0x510/0x510 [ 43.507015] do_group_exit+0x149/0x400 [ 43.510875] ? SyS_exit+0x30/0x30 [ 43.514299] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.519286] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 43.524015] SyS_exit_group+0x1d/0x20 [ 43.527789] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 43.532514] RIP: 0033:0x449099 [ 43.535672] RSP: 002b:00007fffd06fde68 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 43.543349] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000000449099 [ 43.550587] RDX: 0000000000474231 RSI: 0000000000000000 RDI: 0000000000000000 [ 43.557826] RBP: 0000000000000086 R08: 00000000006dd1c0 R09: 0000000000000000 [ 43.565151] R10: 00000000006dd144 R11: 0000000000000202 R12: 0000000000000000 [ 43.572388] R13: 00007fffd06fde0f R14: 00007fa36c8839c0 R15: 0000000000000000 [ 43.579784] Dumping ftrace buffer: [ 43.583349] (ftrace buffer empty) [ 43.587027] Kernel Offset: disabled [ 43.590625] Rebooting in 86400 seconds..