[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.0.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.379353][ T6869] 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. [ 57.416214][ T6869] ------------[ cut here ]------------ [ 57.422109][ T6869] WARNING: CPU: 0 PID: 6869 at arch/x86/kvm/vmx/vmx.c:4809 handle_exception_nmi+0x10e1/0x12d0 [ 57.433909][ T6869] Kernel panic - not syncing: panic_on_warn set ... [ 57.440510][ T6869] CPU: 0 PID: 6869 Comm: syz-executor982 Not tainted 5.9.0-rc6-syzkaller #0 [ 57.449203][ T6869] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.459274][ T6869] Call Trace: [ 57.462589][ T6869] dump_stack+0x198/0x1fd [ 57.466933][ T6869] panic+0x382/0x7fb [ 57.470896][ T6869] ? __warn_printk+0xf3/0xf3 [ 57.475464][ T6869] ? printk+0xba/0xed [ 57.479422][ T6869] ? log_store.cold+0x16/0x16 [ 57.484086][ T6869] ? __warn.cold+0x5/0x4b [ 57.488389][ T6869] ? __warn+0xd6/0x1f2 [ 57.492474][ T6869] ? handle_exception_nmi+0x10e1/0x12d0 [ 57.498006][ T6869] __warn.cold+0x20/0x4b [ 57.502224][ T6869] ? handle_exception_nmi+0x10e1/0x12d0 [ 57.507785][ T6869] report_bug+0x1bd/0x210 [ 57.512135][ T6869] handle_bug+0x38/0x90 [ 57.516271][ T6869] exc_invalid_op+0x14/0x40 [ 57.520769][ T6869] asm_exc_invalid_op+0x12/0x20 [ 57.525614][ T6869] RIP: 0010:handle_exception_nmi+0x10e1/0x12d0 [ 57.531780][ T6869] Code: 0f 84 16 f3 ff ff e8 ee 5c 5a 00 48 89 ef c7 85 ac 0e 00 00 00 00 00 00 e8 5c 87 f0 ff 41 89 c4 e9 fd f2 ff ff e8 cf 5c 5a 00 <0f> 0b e9 85 f8 ff ff e8 c3 5c 5a 00 be f5 ff ff ff bf 01 00 00 00 [ 57.551400][ T6869] RSP: 0018:ffffc90000f27a78 EFLAGS: 00010293 [ 57.557442][ T6869] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff811bd9f5 [ 57.565388][ T6869] RDX: ffff888095896180 RSI: ffffffff811be171 RDI: 0000000000000001 [ 57.573512][ T6869] RBP: ffff88808e984040 R08: 0000000000000001 R09: ffff88808e984387 [ 57.581463][ T6869] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 57.589421][ T6869] R13: 00000000000000b9 R14: ffff88808e984380 R15: 0000000000000000 [ 57.597418][ T6869] ? handle_exception_nmi+0x965/0x12d0 [ 57.602878][ T6869] ? handle_exception_nmi+0x10e1/0x12d0 [ 57.608429][ T6869] ? handle_exception_nmi+0x10e1/0x12d0 [ 57.613952][ T6869] ? vmx_skip_emulated_instruction+0x250/0x250 [ 57.620178][ T6869] vmx_handle_exit+0x2a6/0x1510 [ 57.625136][ T6869] vcpu_enter_guest+0x18f4/0x3c20 [ 57.630142][ T6869] ? kvm_vcpu_reload_apic_access_page+0x80/0x80 [ 57.636360][ T6869] ? lock_release+0x8f0/0x8f0 [ 57.641026][ T6869] ? mark_held_locks+0x9f/0xe0 [ 57.645786][ T6869] ? lock_is_held_type+0xbb/0xf0 [ 57.650703][ T6869] ? kvm_load_guest_fpu+0xa4/0x3f0 [ 57.655794][ T6869] ? __local_bh_enable_ip+0x10f/0x1f0 [ 57.661146][ T6869] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 57.667104][ T6869] ? lock_is_held_type+0xbb/0xf0 [ 57.672024][ T6869] ? kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 57.677716][ T6869] kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 57.683260][ T6869] kvm_vcpu_ioctl+0x467/0xdf0 [ 57.687914][ T6869] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 57.693702][ T6869] ? do_huge_pmd_anonymous_page+0x8f2/0x2200 [ 57.699678][ T6869] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 57.705563][ T6869] ? do_vfs_ioctl+0x27d/0x1090 [ 57.710326][ T6869] ? generic_block_fiemap+0x60/0x60 [ 57.715602][ T6869] ? __up_read+0x1a1/0x7b0 [ 57.720008][ T6869] kvm_vcpu_compat_ioctl+0x1a2/0x340 [ 57.725273][ T6869] ? kvm_vcpu_ioctl+0xdf0/0xdf0 [ 57.730112][ T6869] ? lock_is_held_type+0xbb/0xf0 [ 57.735045][ T6869] ? bpf_lsm_file_ioctl+0x5/0x10 [ 57.739970][ T6869] ? kvm_vcpu_ioctl+0xdf0/0xdf0 [ 57.744799][ T6869] __do_compat_sys_ioctl+0x1d3/0x230 [ 57.750062][ T6869] __do_fast_syscall_32+0x60/0x90 [ 57.755079][ T6869] do_fast_syscall_32+0x2f/0x70 [ 57.759907][ T6869] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 57.766219][ T6869] RIP: 0023:0xf7fcb549 [ 57.770267][ T6869] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 57.789858][ T6869] RSP: 002b:00000000ff9e4fcc EFLAGS: 00000286 ORIG_RAX: 0000000000000036 [ 57.798246][ T6869] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000000ae80 [ 57.806195][ T6869] RDX: 0000000000000000 RSI: 00000000080eb088 RDI: 00000000ff9e5020 [ 57.814143][ T6869] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 57.822090][ T6869] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 57.830041][ T6869] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 57.839285][ T6869] Kernel Offset: disabled [ 57.843667][ T6869] Rebooting in 86400 seconds..