[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.0.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.623862][ T6829] 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. [ 59.647454][ T6829] ------------[ cut here ]------------ [ 59.653177][ T6829] kernel BUG at arch/x86/kvm/mmu/mmu.c:3722! [ 59.660317][ T6829] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 59.666404][ T6829] CPU: 1 PID: 6829 Comm: syz-executor407 Not tainted 5.7.0-rc7-next-20200525-syzkaller #0 [ 59.676279][ T6829] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.686336][ T6829] RIP: 0010:kvm_mmu_load+0xbfa/0xe00 [ 59.691600][ T6829] Code: 3c c8 98 00 48 8b 44 24 08 e9 cf f5 ff ff e8 fd c7 98 00 e9 b7 f4 ff ff 4c 89 f7 e8 20 c8 98 00 e9 78 f4 ff ff e8 56 f0 59 00 <0f> 0b 48 89 df e8 0c c8 98 00 e9 7e f8 ff ff e8 02 c8 98 00 e9 c4 [ 59.711267][ T6829] RSP: 0018:ffffc900015b7b30 EFLAGS: 00010293 [ 59.717330][ T6829] RAX: ffff88809f620380 RBX: 0000000000000000 RCX: ffffffff8118eec1 [ 59.725382][ T6829] RDX: 0000000000000000 RSI: ffffffff8118f9aa RDI: 0000000000000001 [ 59.733850][ T6829] RBP: ffff888094e3c040 R08: ffff88809f620380 R09: ffffed1015ce718c [ 59.742090][ T6829] R10: ffff8880ae738c5b R11: ffffed1015ce718b R12: 0000000000000000 [ 59.750153][ T6829] R13: 0000000000000001 R14: ffff888094e3c458 R15: 0000000000000000 [ 59.758207][ T6829] FS: 000000000197b880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 59.767219][ T6829] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.773888][ T6829] CR2: 00007f086b3666c0 CR3: 0000000096065000 CR4: 00000000001426e0 [ 59.781866][ T6829] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.789938][ T6829] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.797909][ T6829] Call Trace: [ 59.801297][ T6829] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.807254][ T6829] kvm_arch_vcpu_ioctl_run+0x4015/0x68d0 [ 59.812881][ T6829] ? kvm_arch_vcpu_runnable+0x6c0/0x6c0 [ 59.818617][ T6829] ? lock_downgrade+0x840/0x840 [ 59.823452][ T6829] ? rcu_read_lock_held_common+0xa0/0xa0 [ 59.829080][ T6829] ? check_preemption_disabled+0x38/0x220 [ 59.835173][ T6829] ? kvm_vcpu_ioctl+0x467/0xe10 [ 59.840142][ T6829] kvm_vcpu_ioctl+0x467/0xe10 [ 59.844847][ T6829] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.851250][ T6829] ? ioctl_file_clone+0x180/0x180 [ 59.856290][ T6829] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.861939][ T6829] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.867902][ T6829] ? check_preemption_disabled+0x38/0x220 [ 59.873612][ T6829] ? check_preemption_disabled+0x38/0x220 [ 59.879759][ T6829] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.886167][ T6829] ksys_ioctl+0x11a/0x180 [ 59.890573][ T6829] __x64_sys_ioctl+0x6f/0xb0 [ 59.895180][ T6829] do_syscall_64+0x60/0xe0 [ 59.899734][ T6829] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.905621][ T6829] RIP: 0033:0x4401f9 [ 59.909511][ T6829] 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 [ 59.929280][ T6829] RSP: 002b:00007ffef7275678 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 59.938231][ T6829] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9 [ 59.947233][ T6829] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 59.955192][ T6829] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 59.963202][ T6829] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401a80 [ 59.971175][ T6829] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000 [ 59.979212][ T6829] Modules linked in: [ 59.984844][ T6829] ---[ end trace 47fb1b4cf680151b ]--- [ 59.990337][ T6829] RIP: 0010:kvm_mmu_load+0xbfa/0xe00 [ 59.995921][ T6829] Code: 3c c8 98 00 48 8b 44 24 08 e9 cf f5 ff ff e8 fd c7 98 00 e9 b7 f4 ff ff 4c 89 f7 e8 20 c8 98 00 e9 78 f4 ff ff e8 56 f0 59 00 <0f> 0b 48 89 df e8 0c c8 98 00 e9 7e f8 ff ff e8 02 c8 98 00 e9 c4 [ 60.017306][ T6829] RSP: 0018:ffffc900015b7b30 EFLAGS: 00010293 [ 60.023524][ T6829] RAX: ffff88809f620380 RBX: 0000000000000000 RCX: ffffffff8118eec1 [ 60.031959][ T6829] RDX: 0000000000000000 RSI: ffffffff8118f9aa RDI: 0000000000000001 [ 60.039933][ T6829] RBP: ffff888094e3c040 R08: ffff88809f620380 R09: ffffed1015ce718c [ 60.048088][ T6829] R10: ffff8880ae738c5b R11: ffffed1015ce718b R12: 0000000000000000 [ 60.056209][ T6829] R13: 0000000000000001 R14: ffff888094e3c458 R15: 0000000000000000 [ 60.064230][ T6829] FS: 000000000197b880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 60.073230][ T6829] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.079838][ T6829] CR2: 00007f4804040018 CR3: 0000000096065000 CR4: 00000000001426e0 [ 60.087847][ T6829] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.095902][ T6829] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.104077][ T6829] Kernel panic - not syncing: Fatal exception [ 60.111470][ T6829] Kernel Offset: disabled [ 60.115876][ T6829] Rebooting in 86400 seconds..