[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.042264][ T6877] 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. [ 62.082586][ T6877] ------------[ cut here ]------------ [ 62.088207][ T6877] WARNING: CPU: 1 PID: 6877 at arch/x86/kvm/vmx/vmx.c:4809 handle_exception_nmi+0x10e1/0x12d0 [ 62.098587][ T6877] Kernel panic - not syncing: panic_on_warn set ... [ 62.105172][ T6877] CPU: 1 PID: 6877 Comm: syz-executor107 Not tainted 5.9.0-rc7-syzkaller #0 [ 62.113888][ T6877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.123971][ T6877] Call Trace: [ 62.127286][ T6877] dump_stack+0x198/0x1fd [ 62.131603][ T6877] panic+0x382/0x7fb [ 62.135476][ T6877] ? __warn_printk+0xf3/0xf3 [ 62.140050][ T6877] ? printk+0xba/0xed [ 62.144063][ T6877] ? log_store.cold+0x16/0x16 [ 62.148721][ T6877] ? __warn.cold+0x5/0x4b [ 62.153027][ T6877] ? __warn+0xd6/0x1f2 [ 62.157098][ T6877] ? handle_exception_nmi+0x10e1/0x12d0 [ 62.162624][ T6877] __warn.cold+0x20/0x4b [ 62.166863][ T6877] ? handle_exception_nmi+0x10e1/0x12d0 [ 62.172387][ T6877] report_bug+0x1bd/0x210 [ 62.176699][ T6877] handle_bug+0x38/0x90 [ 62.180834][ T6877] exc_invalid_op+0x14/0x40 [ 62.185315][ T6877] asm_exc_invalid_op+0x12/0x20 [ 62.190148][ T6877] RIP: 0010:handle_exception_nmi+0x10e1/0x12d0 [ 62.196276][ T6877] Code: 0f 84 16 f3 ff ff e8 3e 5d 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 1f 5d 5a 00 <0f> 0b e9 85 f8 ff ff e8 13 5d 5a 00 be f5 ff ff ff bf 01 00 00 00 [ 62.216134][ T6877] RSP: 0018:ffffc900048c7b58 EFLAGS: 00010293 [ 62.222177][ T6877] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff811bd9f5 [ 62.230203][ T6877] RDX: ffff88808f9e2000 RSI: ffffffff811be171 RDI: 0000000000000001 [ 62.238161][ T6877] RBP: ffff8880a8534040 R08: 0000000000000001 R09: ffff8880a8534387 [ 62.246131][ T6877] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 62.254089][ T6877] R13: 00000000000000b9 R14: ffff8880a8534380 R15: 0000000000000000 [ 62.262057][ T6877] ? handle_exception_nmi+0x965/0x12d0 [ 62.267498][ T6877] ? handle_exception_nmi+0x10e1/0x12d0 [ 62.273032][ T6877] ? handle_exception_nmi+0x10e1/0x12d0 [ 62.278561][ T6877] ? vmx_skip_emulated_instruction+0x250/0x250 [ 62.284691][ T6877] vmx_handle_exit+0x2a6/0x1510 [ 62.289523][ T6877] vcpu_enter_guest+0x18f4/0x3c20 [ 62.294537][ T6877] ? kvm_vcpu_reload_apic_access_page+0x80/0x80 [ 62.300800][ T6877] ? lock_release+0x8f0/0x8f0 [ 62.305500][ T6877] ? mark_held_locks+0x9f/0xe0 [ 62.310242][ T6877] ? lock_is_held_type+0xbb/0xf0 [ 62.315161][ T6877] ? kvm_load_guest_fpu+0xa4/0x3f0 [ 62.320250][ T6877] ? __local_bh_enable_ip+0x10f/0x1f0 [ 62.325599][ T6877] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 62.331559][ T6877] ? lock_is_held_type+0xbb/0xf0 [ 62.336478][ T6877] ? kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 62.342535][ T6877] kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 62.348064][ T6877] kvm_vcpu_ioctl+0x467/0xdf0 [ 62.352830][ T6877] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 62.358613][ T6877] ? generic_block_fiemap+0x60/0x60 [ 62.363806][ T6877] ? __up_read+0x1a1/0x7b0 [ 62.368200][ T6877] ? _down_write_nest_lock+0x150/0x150 [ 62.373639][ T6877] ? lock_is_held_type+0xbb/0xf0 [ 62.378585][ T6877] ? bpf_lsm_file_ioctl+0x5/0x10 [ 62.383501][ T6877] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 62.390676][ T6877] __x64_sys_ioctl+0x193/0x200 [ 62.395437][ T6877] do_syscall_64+0x2d/0x70 [ 62.399847][ T6877] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.405729][ T6877] RIP: 0033:0x4429e9 [ 62.409616][ T6877] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 9b 0b fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.429248][ T6877] RSP: 002b:00007ffd9c4cd178 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 62.437663][ T6877] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004429e9 [ 62.445637][ T6877] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 62.453610][ T6877] RBP: 00000000006cd018 R08: 00000000004002c8 R09: 00000000004002c8 [ 62.461585][ T6877] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000403a10 [ 62.469555][ T6877] R13: 0000000000403aa0 R14: 0000000000000000 R15: 0000000000000000 [ 62.478989][ T6877] Kernel Offset: disabled [ 62.483373][ T6877] Rebooting in 86400 seconds..