[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.980868] 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. [ 37.013814] WARNING: CPU: 0 PID: 8109 at arch/x86/kvm/vmx.c:7091 handle_exception+0x747/0xca0 [ 37.022583] Kernel panic - not syncing: panic_on_warn set ... [ 37.022583] [ 37.029947] CPU: 0 PID: 8109 Comm: syz-executor406 Not tainted 4.19.211-syzkaller #0 [ 37.037808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.047184] Call Trace: [ 37.049774] dump_stack+0x1fc/0x2ef [ 37.053411] panic+0x26a/0x50e [ 37.056591] ? __warn_printk+0xf3/0xf3 [ 37.060469] ? handle_exception+0x747/0xca0 [ 37.064781] ? __probe_kernel_read+0x130/0x1b0 [ 37.069413] ? __warn.cold+0x5/0x5a [ 37.073034] ? __warn+0xe4/0x200 [ 37.076416] ? handle_exception+0x747/0xca0 [ 37.080728] __warn.cold+0x20/0x5a [ 37.084268] ? handle_exception+0x747/0xca0 [ 37.088575] report_bug+0x262/0x2b0 [ 37.092189] do_error_trap+0x1d7/0x310 [ 37.096059] ? math_error+0x310/0x310 [ 37.099847] ? __lock_acquire+0x6de/0x3ff0 [ 37.104065] ? error_entry+0x72/0xd0 [ 37.107793] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.112893] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.117729] invalid_op+0x14/0x20 [ 37.121173] RIP: 0010:handle_exception+0x747/0xca0 [ 37.126098] Code: ff 89 de e8 2b b7 49 00 85 db 75 20 e8 b2 b5 49 00 0f b6 1d 42 f6 0d 0a 31 ff 89 de e8 d2 b6 49 00 84 db 74 07 e8 99 b5 49 00 <0f> 0b e8 92 b5 49 00 4c 89 e2 44 89 ee 45 31 c0 31 c9 48 89 ef e8 [ 37.144995] RSP: 0018:ffff888096aa7938 EFLAGS: 00010293 [ 37.150355] RAX: ffff8880951f61c0 RBX: 0000000000000001 RCX: ffffffff8118cfce [ 37.157692] RDX: 0000000000000000 RSI: ffffffff8118cfd7 RDI: 0000000000000001 [ 37.164946] RBP: ffff888094ce0040 R08: 0000000000000000 R09: 0000000000000000 [ 37.172196] R10: 0000000000000001 R11: 0000000000000000 R12: 00000000a0000975 [ 37.179465] R13: 0000000000000000 R14: 0000000080000300 R15: 0000000000000000 [ 37.186736] ? handle_exception+0x73e/0xca0 [ 37.191040] ? handle_exception+0x747/0xca0 [ 37.195346] ? handle_exception+0x747/0xca0 [ 37.199648] ? handle_cpuid+0x20/0x20 [ 37.203430] vmx_handle_exit+0x26c/0xf90 [ 37.207475] ? lock_acquire+0x170/0x3c0 [ 37.211436] ? kvm_arch_vcpu_ioctl_run+0x262d/0x6f70 [ 37.216522] ? kvm_arch_vcpu_ioctl_run+0x25c4/0x6f70 [ 37.221607] kvm_arch_vcpu_ioctl_run+0x27b2/0x6f70 [ 37.226531] ? kvm_arch_vcpu_runnable+0x690/0x690 [ 37.231357] ? __mutex_unlock_slowpath+0xea/0x610 [ 37.236219] ? check_preemption_disabled+0x41/0x280 [ 37.241231] ? kvm_vcpu_ioctl+0x493/0xe10 [ 37.245363] kvm_vcpu_ioctl+0x493/0xe10 [ 37.249320] ? kvm_vm_ioctl_check_extension_generic+0xb0/0xb0 [ 37.255185] ? do_huge_pmd_anonymous_page+0x935/0x1e60 [ 37.260460] ? prep_transhuge_page+0xa0/0xa0 [ 37.264851] ? mark_held_locks+0xf0/0xf0 [ 37.268895] ? __handle_mm_fault+0xf34/0x41c0 [ 37.273373] ? kvm_vm_ioctl_check_extension_generic+0xb0/0xb0 [ 37.279244] do_vfs_ioctl+0xcdb/0x12e0 [ 37.283115] ? ioctl_preallocate+0x200/0x200 [ 37.287506] ? __do_page_fault+0x6d1/0xd60 [ 37.291723] ? lock_downgrade+0x720/0x720 [ 37.295853] ? check_preemption_disabled+0x41/0x280 [ 37.300852] ? kvm_on_user_return+0x2e6/0x3f0 [ 37.305328] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 37.309890] ? kvm_on_user_return+0x1cd/0x3f0 [ 37.314368] ksys_ioctl+0x9b/0xc0 [ 37.317804] __x64_sys_ioctl+0x6f/0xb0 [ 37.321672] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 37.326242] do_syscall_64+0xf9/0x620 [ 37.330025] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.335193] RIP: 0033:0x7f5a40ddcd99 [ 37.338889] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 37.357776] RSP: 002b:00007fff13272ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 37.365470] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5a40ddcd99 [ 37.372725] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 37.379986] RBP: 00007f5a40da0890 R08: 0000000000000000 R09: 0000000000000000 [ 37.387239] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5a40da0920 [ 37.394493] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.401972] Kernel Offset: disabled [ 37.405725] Rebooting in 86400 seconds..