[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.0.68' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.798880] 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. [ 27.831028] ------------[ cut here ]------------ [ 27.835844] WARNING: CPU: 1 PID: 7988 at arch/x86/kvm/vmx.c:6952 handle_ept_misconfig+0x11f/0x430 [ 27.844829] Kernel panic - not syncing: panic_on_warn set ... [ 27.844829] [ 27.852168] CPU: 1 PID: 7988 Comm: syz-executor313 Not tainted 4.14.282-syzkaller #0 [ 27.860037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.869368] Call Trace: [ 27.871939] dump_stack+0x1b2/0x281 [ 27.875546] panic+0x1f9/0x42d [ 27.878727] ? add_taint.cold+0x16/0x16 [ 27.882683] ? handle_ept_misconfig+0x11f/0x430 [ 27.887329] ? handle_ept_misconfig+0x11f/0x430 [ 27.891976] __warn.cold+0x20/0x44 [ 27.895495] ? ist_end_non_atomic+0x10/0x10 [ 27.899808] ? handle_ept_misconfig+0x11f/0x430 [ 27.904456] report_bug+0x208/0x250 [ 27.908080] do_error_trap+0x195/0x2d0 [ 27.911957] ? math_error+0x2d0/0x2d0 [ 27.915806] ? mapping_level+0xfd/0x3c0 [ 27.919787] ? mmu_topup_memory_caches+0x269/0x300 [ 27.924702] ? handle_abnormal_pfn+0x50/0x3a0 [ 27.929179] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.934003] invalid_op+0x1b/0x40 [ 27.937442] RIP: 0010:handle_ept_misconfig+0x11f/0x430 [ 27.942691] RSP: 0018:ffff88808d54fa68 EFLAGS: 00010297 [ 27.948029] RAX: ffff8880995726c0 RBX: ffffffff8114e8d0 RCX: 7ff0000000000000 [ 27.955274] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b3068040 [ 27.962519] RBP: ffff8880b3068040 R08: 0000000000000007 R09: ffff88808d54f9a8 [ 27.969777] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff2 [ 27.977026] R13: 0000000000000031 R14: 0000000000000000 R15: ffff8880b3068040 [ 27.984280] ? handle_invd+0x30/0x30 [ 27.987994] ? handle_ept_misconfig+0x11f/0x430 [ 27.992641] ? handle_invd+0x30/0x30 [ 27.996333] vmx_handle_exit+0x1f8/0x14b0 [ 28.000464] ? kvm_arch_vcpu_ioctl_run+0x1c18/0x5c80 [ 28.005548] kvm_arch_vcpu_ioctl_run+0x1dc7/0x5c80 [ 28.010461] ? vcpu_load+0x18/0x90 [ 28.013982] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 28.019424] ? kvm_arch_vcpu_runnable+0x530/0x530 [ 28.024260] ? kvm_arch_vcpu_load+0x2c4/0x750 [ 28.028735] ? check_preemption_disabled+0x35/0x240 [ 28.033732] ? kvm_vcpu_ioctl+0x3de/0xc50 [ 28.037855] kvm_vcpu_ioctl+0x3de/0xc50 [ 28.041807] ? kvm_vcpu_fault+0x320/0x320 [ 28.045934] ? lock_downgrade+0x740/0x740 [ 28.050061] ? populate_vma_page_range+0x17b/0x210 [ 28.054973] ? up_read+0x17/0x30 [ 28.058316] ? __mm_populate+0x24c/0x2c0 [ 28.062357] ? populate_vma_page_range+0x210/0x210 [ 28.067264] ? kvm_vcpu_fault+0x320/0x320 [ 28.071395] do_vfs_ioctl+0x75a/0xff0 [ 28.075190] ? ioctl_preallocate+0x1a0/0x1a0 [ 28.079580] ? fput_many+0xe/0x140 [ 28.083095] ? SyS_mmap_pgoff+0x25e/0x510 [ 28.087221] ? security_file_ioctl+0x83/0xb0 [ 28.091604] SyS_ioctl+0x7f/0xb0 [ 28.094947] ? do_vfs_ioctl+0xff0/0xff0 [ 28.098899] do_syscall_64+0x1d5/0x640 [ 28.102770] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.107939] RIP: 0033:0x7f3bebc68d39 [ 28.111624] RSP: 002b:00007ffe39504838 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 28.119310] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3bebc68d39 [ 28.126558] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 28.133807] RBP: 00007f3bebc2c830 R08: 0000000000000000 R09: 0000000000000000 [ 28.141054] R10: 0000000000000006 R11: 0000000000000246 R12: 00007f3bebc2c8c0 [ 28.148298] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.155860] Kernel Offset: disabled [ 28.159530] Rebooting in 86400 seconds..