[ 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 '10.128.0.134' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.767954][ T6887] 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. [ 60.819904][ T6887] ------------[ cut here ]------------ [ 60.825732][ T6887] WARNING: CPU: 1 PID: 6887 at arch/x86/kvm/vmx/vmx.c:4809 handle_exception_nmi+0x10e1/0x12d0 [ 60.825750][ T6887] Kernel panic - not syncing: panic_on_warn set ... [ 60.825772][ T6887] CPU: 1 PID: 6887 Comm: syz-executor341 Not tainted 5.9.0-rc6-syzkaller #0 [ 60.825787][ T6887] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.825792][ T6887] Call Trace: [ 60.825811][ T6887] dump_stack+0x198/0x1fd [ 60.868884][ T6887] panic+0x382/0x7fb [ 60.872756][ T6887] ? __warn_printk+0xf3/0xf3 [ 60.877324][ T6887] ? printk+0xba/0xed [ 60.881279][ T6887] ? log_store.cold+0x16/0x16 [ 60.885933][ T6887] ? __warn.cold+0x5/0x4b [ 60.890246][ T6887] ? __warn+0xd6/0x1f2 [ 60.894305][ T6887] ? handle_exception_nmi+0x10e1/0x12d0 [ 60.899836][ T6887] __warn.cold+0x20/0x4b [ 60.904060][ T6887] ? handle_exception_nmi+0x10e1/0x12d0 [ 60.909586][ T6887] report_bug+0x1bd/0x210 [ 60.913908][ T6887] handle_bug+0x38/0x90 [ 60.918068][ T6887] exc_invalid_op+0x14/0x40 [ 60.922560][ T6887] asm_exc_invalid_op+0x12/0x20 [ 60.927391][ T6887] RIP: 0010:handle_exception_nmi+0x10e1/0x12d0 [ 60.933519][ T6887] 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 [ 60.953099][ T6887] RSP: 0018:ffffc9000100fb58 EFLAGS: 00010293 [ 60.959140][ T6887] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff811bd9f5 [ 60.967089][ T6887] RDX: ffff8880a04ca380 RSI: ffffffff811be171 RDI: 0000000000000001 [ 60.975049][ T6887] RBP: ffff888092e10040 R08: 0000000000000001 R09: ffff888092e10387 [ 60.982994][ T6887] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002 [ 60.990945][ T6887] R13: fffffffffffffff8 R14: ffff888092e10380 R15: 0000000000000000 [ 60.998906][ T6887] ? handle_exception_nmi+0x965/0x12d0 [ 61.004340][ T6887] ? handle_exception_nmi+0x10e1/0x12d0 [ 61.009867][ T6887] ? handle_exception_nmi+0x10e1/0x12d0 [ 61.015402][ T6887] ? vmx_skip_emulated_instruction+0x250/0x250 [ 61.021543][ T6887] vmx_handle_exit+0x2a6/0x1510 [ 61.026378][ T6887] vcpu_enter_guest+0x18f4/0x3c20 [ 61.031385][ T6887] ? kvm_vcpu_reload_apic_access_page+0x80/0x80 [ 61.037602][ T6887] ? lock_release+0x8f0/0x8f0 [ 61.042265][ T6887] ? mark_held_locks+0x9f/0xe0 [ 61.047005][ T6887] ? lock_is_held_type+0xbb/0xf0 [ 61.051920][ T6887] ? kvm_load_guest_fpu+0xa4/0x3f0 [ 61.057009][ T6887] ? __local_bh_enable_ip+0x10f/0x1f0 [ 61.062369][ T6887] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 61.068328][ T6887] ? lock_is_held_type+0xbb/0xf0 [ 61.073246][ T6887] ? kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 61.078952][ T6887] kvm_arch_vcpu_ioctl_run+0x440/0x1780 [ 61.084483][ T6887] kvm_vcpu_ioctl+0x467/0xdf0 [ 61.089137][ T6887] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 61.094921][ T6887] ? generic_block_fiemap+0x60/0x60 [ 61.100097][ T6887] ? __up_read+0x1a1/0x7b0 [ 61.104502][ T6887] ? _down_write_nest_lock+0x150/0x150 [ 61.109948][ T6887] ? bpf_lsm_file_ioctl+0x5/0x10 [ 61.114862][ T6887] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 61.120648][ T6887] __x64_sys_ioctl+0x193/0x200 [ 61.125412][ T6887] do_syscall_64+0x2d/0x70 [ 61.129811][ T6887] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.135680][ T6887] RIP: 0033:0x442839 [ 61.139554][ T6887] 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 [ 61.159136][ T6887] RSP: 002b:00007ffff2917698 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 61.167521][ T6887] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000442839 [ 61.175470][ T6887] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 61.183428][ T6887] RBP: 00000000006cd018 R08: 0000000000000000 R09: 00000000004002c8 [ 61.191387][ T6887] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000403860 [ 61.199346][ T6887] R13: 00000000004038f0 R14: 0000000000000000 R15: 0000000000000000 [ 61.208505][ T6887] Kernel Offset: disabled [ 61.212874][ T6887] Rebooting in 86400 seconds..