[ OK ] Started Getty on tty2. Starting Load/Save RF Kill Switch Status... [ 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 Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 61.937726][ T6835] 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. [ 61.961241][ T6835] ------------[ cut here ]------------ [ 61.966881][ T6835] kernel BUG at arch/x86/kvm/mmu/mmu.c:3719! [ 61.973010][ T6835] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 61.979082][ T6835] CPU: 1 PID: 6835 Comm: syz-executor089 Not tainted 5.7.0-rc7-next-20200529-syzkaller #0 [ 61.989086][ T6835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.000174][ T6835] RIP: 0010:kvm_mmu_load+0xbfa/0xe00 [ 62.006369][ T6835] Code: ac 23 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 6d 23 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 90 23 99 00 e9 78 f4 ff ff e8 56 1a 5a 00 <0f> 0b 48 89 df e8 7c 23 99 00 e9 7e f8 ff ff e8 72 23 99 00 e9 c4 [ 62.026306][ T6835] RSP: 0018:ffffc90000fb7b30 EFLAGS: 00010293 [ 62.032788][ T6835] RAX: ffff888099d18180 RBX: 0000000000000000 RCX: ffffffff8118d661 [ 62.040750][ T6835] RDX: 0000000000000000 RSI: ffffffff8118e14a RDI: 0000000000000001 [ 62.048756][ T6835] RBP: ffff888099b88040 R08: ffff888099d18180 R09: ffffed1015ce719c [ 62.056996][ T6835] R10: ffff8880ae738cdb R11: ffffed1015ce719b R12: 0000000000000000 [ 62.065061][ T6835] R13: 0000000000000001 R14: ffff888099b88458 R15: 0000000000000000 [ 62.073014][ T6835] FS: 0000000000bb6880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 62.081918][ T6835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.088997][ T6835] CR2: 00007f004879f6c0 CR3: 0000000094a1e000 CR4: 00000000001426e0 [ 62.097294][ T6835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.105374][ T6835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.113408][ T6835] Call Trace: [ 62.116687][ T6835] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 62.123399][ T6835] kvm_arch_vcpu_ioctl_run+0x4016/0x68d0 [ 62.129678][ T6835] ? kvm_arch_vcpu_runnable+0x6c0/0x6c0 [ 62.135380][ T6835] ? lock_downgrade+0x840/0x840 [ 62.140233][ T6835] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.146124][ T6835] ? check_preemption_disabled+0x38/0x220 [ 62.151838][ T6835] ? kvm_vcpu_ioctl+0x467/0xe10 [ 62.156661][ T6835] kvm_vcpu_ioctl+0x467/0xe10 [ 62.161317][ T6835] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 62.167708][ T6835] ? ioctl_file_clone+0x180/0x180 [ 62.172715][ T6835] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.178693][ T6835] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.184658][ T6835] ? check_preemption_disabled+0x38/0x220 [ 62.190356][ T6835] ? check_preemption_disabled+0x38/0x220 [ 62.196097][ T6835] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 62.202489][ T6835] ksys_ioctl+0x11a/0x180 [ 62.206819][ T6835] __x64_sys_ioctl+0x6f/0xb0 [ 62.211400][ T6835] do_syscall_64+0x60/0xe0 [ 62.215793][ T6835] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.221677][ T6835] RIP: 0033:0x4401f9 [ 62.225556][ T6835] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.245144][ T6835] RSP: 002b:00007fffbcb52c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 62.253548][ T6835] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9 [ 62.261961][ T6835] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 62.269913][ T6835] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 62.277927][ T6835] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401a80 [ 62.285899][ T6835] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000 [ 62.294837][ T6835] Modules linked in: [ 62.299817][ T6835] ---[ end trace d42dfee09b9d2f92 ]--- [ 62.305343][ T6835] RIP: 0010:kvm_mmu_load+0xbfa/0xe00 [ 62.311015][ T6835] Code: ac 23 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 6d 23 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 90 23 99 00 e9 78 f4 ff ff e8 56 1a 5a 00 <0f> 0b 48 89 df e8 7c 23 99 00 e9 7e f8 ff ff e8 72 23 99 00 e9 c4 [ 62.330697][ T6835] RSP: 0018:ffffc90000fb7b30 EFLAGS: 00010293 [ 62.336820][ T6835] RAX: ffff888099d18180 RBX: 0000000000000000 RCX: ffffffff8118d661 [ 62.344848][ T6835] RDX: 0000000000000000 RSI: ffffffff8118e14a RDI: 0000000000000001 [ 62.352971][ T6835] RBP: ffff888099b88040 R08: ffff888099d18180 R09: ffffed1015ce719c [ 62.360997][ T6835] R10: ffff8880ae738cdb R11: ffffed1015ce719b R12: 0000000000000000 [ 62.369737][ T6835] R13: 0000000000000001 R14: ffff888099b88458 R15: 0000000000000000 [ 62.377712][ T6835] FS: 0000000000bb6880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 62.386713][ T6835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.393362][ T6835] CR2: 00007f004879f6c0 CR3: 0000000094a1e000 CR4: 00000000001426e0 [ 62.401393][ T6835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.409438][ T6835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.417414][ T6835] Kernel panic - not syncing: Fatal exception [ 62.424873][ T6835] Kernel Offset: disabled [ 62.429197][ T6835] Rebooting in 86400 seconds..