[ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.095366][ T6901] 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. [ 65.147730][ T6901] ------------[ cut here ]------------ [ 65.154072][ T6901] WARNING: CPU: 1 PID: 6901 at arch/x86/kvm/vmx/vmx.c:4809 handle_exception_nmi+0x10e1/0x12d0 [ 65.165128][ T6901] Kernel panic - not syncing: panic_on_warn set ... [ 65.171741][ T6901] CPU: 1 PID: 6901 Comm: syz-executor149 Not tainted 5.9.0-rc7-syzkaller #0 [ 65.180416][ T6901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.190457][ T6901] Call Trace: [ 65.193752][ T6901] dump_stack+0x198/0x1fd [ 65.198073][ T6901] panic+0x382/0x7fb [ 65.201969][ T6901] ? __warn_printk+0xf3/0xf3 [ 65.206632][ T6901] ? printk+0xba/0xed [ 65.211567][ T6901] ? log_store.cold+0x16/0x16 [ 65.216244][ T6901] ? skip_emulated_instruction+0x21c/0x3a0 [ 65.222055][ T6901] ? __warn.cold+0x5/0x4b [ 65.226374][ T6901] ? __warn+0xd6/0x1f2 [ 65.230447][ T6901] ? handle_exception_nmi+0x10e1/0x12d0 [ 65.235980][ T6901] __warn.cold+0x20/0x4b [ 65.240214][ T6901] ? handle_exception_nmi+0x10e1/0x12d0 [ 65.245751][ T6901] report_bug+0x1bd/0x210 [ 65.250083][ T6901] handle_bug+0x38/0x90 [ 65.254224][ T6901] exc_invalid_op+0x14/0x40 [ 65.258719][ T6901] asm_exc_invalid_op+0x12/0x20 [ 65.263567][ T6901] RIP: 0010:handle_exception_nmi+0x10e1/0x12d0 [ 65.269701][ T6901] 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 [ 65.289569][ T6901] RSP: 0018:ffffc90005567b58 EFLAGS: 00010293 [ 65.295633][ T6901] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff811bd9f5 [ 65.303927][ T6901] RDX: ffff8880913e21c0 RSI: ffffffff811be171 RDI: 0000000000000001 [ 65.311907][ T6901] RBP: ffff8880a8ab0040 R08: 0000000000000001 R09: ffff8880a8ab0387 [ 65.319864][ T6901] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002 [ 65.327838][ T6901] R13: ffffffffef6686b0 R14: ffff8880a8ab0380 R15: 0000000000000000 [ 65.335828][ T6901] ? handle_exception_nmi+0x965/0x12d0 [ 65.341290][ T6901] ? handle_exception_nmi+0x10e1/0x12d0 [ 65.346832][ T6901] ? handle_exception_nmi+0x10e1/0x12d0 [ 65.352369][ T6901] ? vmx_skip_emulated_instruction+0x250/0x250 [ 65.358520][ T6901] vmx_handle_exit+0x2a6/0x1510 [ 65.363364][ T6901] vcpu_enter_guest+0x18f4/0x3c20 [ 65.368396][ T6901] ? kvm_vcpu_reload_apic_access_page+0x80/0x80 [ 65.374651][ T6901] ? lock_release+0x8f0/0x8f0 [ 65.379319][ T6901] ? mark_held_locks+0x9f/0xe0 [ 65.384068][ T6901] ? lock_is_held_type+0xbb/0xf0 [ 65.389002][ T6901] ? kvm_load_guest_fpu+0xa4/0x3f0 [ 65.394102][ T6901] ? __local_bh_enable_ip+0x10f/0x1f0 [ 65.399466][ T6901] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 65.405446][ T6901] ? lock_is_held_type+0xbb/0xf0 [ 65.410376][ T6901] ? kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 65.416094][ T6901] kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 65.421658][ T6901] kvm_vcpu_ioctl+0x467/0xdf0 [ 65.426340][ T6901] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 65.432194][ T6901] ? generic_block_fiemap+0x60/0x60 [ 65.437411][ T6901] ? check_preemption_disabled+0x50/0x130 [ 65.443127][ T6901] ? call_rcu+0x383/0x7c0 [ 65.447458][ T6901] ? blkcg_maybe_throttle_current+0x617/0xf00 [ 65.454492][ T6901] ? call_rcu+0x383/0x7c0 [ 65.458828][ T6901] ? lock_is_held_type+0xbb/0xf0 [ 65.463755][ T6901] ? __blkcg_punt_bio_submit+0x1d0/0x1d0 [ 65.469379][ T6901] ? check_preemption_disabled+0x50/0x130 [ 65.475098][ T6901] ? bpf_lsm_file_ioctl+0x5/0x10 [ 65.480035][ T6901] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 65.485842][ T6901] __x64_sys_ioctl+0x193/0x200 [ 65.490619][ T6901] do_syscall_64+0x2d/0x70 [ 65.495023][ T6901] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.500900][ T6901] RIP: 0033:0x443479 [ 65.504776][ T6901] 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 [ 65.524644][ T6901] RSP: 002b:00007ffcea0e58d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 65.533050][ T6901] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000443479 [ 65.541011][ T6901] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 65.549415][ T6901] RBP: 00000000006cd018 R08: 0000000000000000 R09: 00000000004002c8 [ 65.557373][ T6901] R10: 0000000000000012 R11: 0000000000000246 R12: 00000000004044a0 [ 65.565332][ T6901] R13: 0000000000404530 R14: 0000000000000000 R15: 0000000000000000 [ 65.574591][ T6901] Kernel Offset: disabled [ 65.578990][ T6901] Rebooting in 86400 seconds..