[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.114' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.419902] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 35.454305] kvm: emulating exchange as write [ 35.667804] ------------[ cut here ]------------ [ 35.672619] WARNING: CPU: 1 PID: 8107 at arch/x86/kvm/x86.c:8095 kvm_arch_vcpu_ioctl_run.cold+0x11/0x48 [ 35.682127] Kernel panic - not syncing: panic_on_warn set ... [ 35.682127] [ 35.689467] CPU: 1 PID: 8107 Comm: syz-executor115 Not tainted 4.19.196-syzkaller #0 [ 35.697332] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.706669] Call Trace: [ 35.709243] dump_stack+0x1fc/0x2ef [ 35.712885] panic+0x26a/0x50e [ 35.716070] ? __warn_printk+0xf3/0xf3 [ 35.719945] ? kvm_arch_vcpu_ioctl_run.cold+0x11/0x48 [ 35.725117] ? __probe_kernel_read+0x130/0x1b0 [ 35.729680] ? __warn.cold+0x5/0x5a [ 35.733286] ? __warn+0xe4/0x200 [ 35.736660] ? kvm_arch_vcpu_ioctl_run.cold+0x11/0x48 [ 35.741839] __warn.cold+0x20/0x5a [ 35.745365] ? kvm_arch_vcpu_ioctl_run.cold+0x11/0x48 [ 35.750573] report_bug+0x262/0x2b0 [ 35.754185] do_error_trap+0x1d7/0x310 [ 35.758061] ? math_error+0x310/0x310 [ 35.761870] ? __irq_work_queue_local+0x101/0x160 [ 35.766692] ? irq_work_queue+0x29/0x80 [ 35.770650] ? error_entry+0x72/0xd0 [ 35.774348] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.779361] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.784184] invalid_op+0x14/0x20 [ 35.787648] RIP: 0010:kvm_arch_vcpu_ioctl_run.cold+0x11/0x48 [ 35.793425] Code: d8 1b f9 e8 a1 7c 71 f9 48 c7 c7 80 3d 62 88 e8 7b d9 01 00 e9 50 e9 1b f9 e8 8b 7c 71 f9 48 c7 c7 20 23 62 88 e8 65 d9 01 00 <0f> 0b e9 7d 29 1c f9 e8 73 7c 71 f9 48 c7 c7 20 23 62 88 e8 4d d9 [ 35.812309] RSP: 0018:ffff888095397a10 EFLAGS: 00010286 [ 35.817672] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 35.825657] RDX: 0000000000000000 RSI: ffffffff814dfc91 RDI: ffffed1012a72f34 [ 35.832906] RBP: ffff888095397bb0 R08: 0000000000000024 R09: 0000000000000000 [ 35.840157] R10: 0000000000000005 R11: 0000000000000000 R12: ffff888098ddc000 [ 35.847407] R13: 0000000000000000 R14: ffff8880a4819100 R15: ffff8880a15a0040 [ 35.854761] ? vprintk_func+0x81/0x180 [ 35.858633] ? do_raw_spin_unlock+0x171/0x230 [ 35.863111] ? _raw_spin_unlock+0x29/0x40 [ 35.867242] ? __mutex_lock+0x365/0x1200 [ 35.871307] ? kvm_arch_vcpu_runnable+0x690/0x690 [ 35.876145] ? synchronize_rcu_expedited+0xa0/0xa0 [ 35.881060] ? lock_downgrade+0x720/0x720 [ 35.885190] ? check_preemption_disabled+0x41/0x280 [ 35.890189] ? check_preemption_disabled+0x41/0x280 [ 35.895188] ? kvm_vcpu_ioctl+0x493/0xe10 [ 35.899321] kvm_vcpu_ioctl+0x493/0xe10 [ 35.903290] ? kvm_vm_ioctl_check_extension_generic+0xb0/0xb0 [ 35.909158] ? mark_held_locks+0xf0/0xf0 [ 35.913202] ? __lock_acquire+0x6de/0x3ff0 [ 35.917441] ? __lock_acquire+0x6de/0x3ff0 [ 35.921660] ? kvm_vm_ioctl_check_extension_generic+0xb0/0xb0 [ 35.927527] do_vfs_ioctl+0xcdb/0x12e0 [ 35.931403] ? lock_downgrade+0x720/0x720 [ 35.935532] ? check_preemption_disabled+0x41/0x280 [ 35.940538] ? ioctl_preallocate+0x200/0x200 [ 35.944927] ? __fget+0x356/0x510 [ 35.948357] ? do_dup2+0x450/0x450 [ 35.951874] ? lock_acquire+0x170/0x3c0 [ 35.955840] ? finish_task_switch+0x118/0x760 [ 35.960325] ksys_ioctl+0x9b/0xc0 [ 35.963760] __x64_sys_ioctl+0x6f/0xb0 [ 35.967629] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 35.972212] do_syscall_64+0xf9/0x620 [ 35.975996] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.981177] RIP: 0033:0x447589 [ 35.984357] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 36.003252] RSP: 002b:00007f34c07da308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 36.010959] RAX: ffffffffffffffda RBX: 00000000004cd438 RCX: 0000000000447589 [ 36.018207] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 36.025458] RBP: 00000000004cd430 R08: 00007f34c07da700 R09: 0000000000000000 [ 36.032729] R10: 00007f34c07da700 R11: 0000000000000246 R12: 00000000004cd43c [ 36.039976] R13: 000000000049c0b8 R14: 6d766b2f7665642f R15: 0000000000022000 [ 36.048250] Kernel Offset: disabled [ 36.051899] Rebooting in 86400 seconds..