[ OK ] Started Daily apt upgrade and clean activities. Starting Permit User Sessions... Starting System Logging Service... [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Reached target Timers. [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ 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 '10.128.0.193' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.862558][ T6806] 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. [ 58.912571][ T6806] ------------[ cut here ]------------ [ 58.918188][ T6806] kernel BUG at arch/x86/kvm/mmu/mmu.c:3722! [ 58.937441][ T6806] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 58.943883][ T6806] CPU: 0 PID: 6806 Comm: syz-executor932 Not tainted 5.7.0-rc6-next-20200522-syzkaller #0 [ 58.954121][ T6806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.964239][ T6806] RIP: 0010:kvm_mmu_load+0xbfa/0xe00 [ 58.969500][ T6806] Code: 9c 5f 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 5d 5f 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 80 5f 99 00 e9 78 f4 ff ff e8 16 4c 5a 00 <0f> 0b 48 89 df e8 6c 5f 99 00 e9 7e f8 ff ff e8 62 5f 99 00 e9 c4 [ 58.989316][ T6806] RSP: 0018:ffffc90001637b10 EFLAGS: 00010293 [ 58.995506][ T6806] RAX: ffff8880a903e300 RBX: 0000000000000000 RCX: ffffffff81195061 [ 59.003460][ T6806] RDX: 0000000000000000 RSI: ffffffff81195b4a RDI: 0000000000000001 [ 59.011422][ T6806] RBP: ffff88808dcac040 R08: ffff8880a903e300 R09: ffffed1015cc717c [ 59.019456][ T6806] R10: ffff8880ae638bdb R11: ffffed1015cc717b R12: 0000000000000000 [ 59.027424][ T6806] R13: 0000000000000001 R14: ffff88808dcac458 R15: 0000000000000000 [ 59.035375][ T6806] FS: 00000000023d7880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 59.044316][ T6806] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.050899][ T6806] CR2: 00005570621d1750 CR3: 0000000099ca7000 CR4: 00000000001426f0 [ 59.058863][ T6806] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.066811][ T6806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.074756][ T6806] Call Trace: [ 59.078045][ T6806] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.083999][ T6806] kvm_arch_vcpu_ioctl_run+0x4022/0x6920 [ 59.089609][ T6806] ? kvm_arch_vcpu_runnable+0x6f0/0x6f0 [ 59.095129][ T6806] ? debug_smp_processor_id+0x2f/0x185 [ 59.100562][ T6806] ? lock_downgrade+0x840/0x840 [ 59.105495][ T6806] ? rcu_read_lock_held_common+0xa0/0xa0 [ 59.111102][ T6806] ? kvm_vcpu_ioctl+0x46a/0xe20 [ 59.115923][ T6806] kvm_vcpu_ioctl+0x46a/0xe20 [ 59.120577][ T6806] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.126975][ T6806] ? ioctl_file_clone+0x180/0x180 [ 59.131998][ T6806] ? debug_smp_processor_id+0x2f/0x185 [ 59.137444][ T6806] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.142983][ T6806] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.148958][ T6806] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 59.155350][ T6806] ksys_ioctl+0x11a/0x180 [ 59.159656][ T6806] __x64_sys_ioctl+0x6f/0xb0 [ 59.164237][ T6806] do_syscall_64+0xf6/0x7d0 [ 59.168729][ T6806] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.174592][ T6806] RIP: 0033:0x440219 [ 59.178461][ T6806] 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 [ 59.198251][ T6806] RSP: 002b:00007ffe912e1b98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 59.206752][ T6806] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 59.214729][ T6806] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 59.222702][ T6806] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 59.230733][ T6806] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401aa0 [ 59.238775][ T6806] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 59.246725][ T6806] Modules linked in: [ 59.251785][ T6806] ---[ end trace 29ef6ca993c0be52 ]--- [ 59.257560][ T6806] RIP: 0010:kvm_mmu_load+0xbfa/0xe00 [ 59.263209][ T6806] Code: 9c 5f 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 5d 5f 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 80 5f 99 00 e9 78 f4 ff ff e8 16 4c 5a 00 <0f> 0b 48 89 df e8 6c 5f 99 00 e9 7e f8 ff ff e8 62 5f 99 00 e9 c4 [ 59.282995][ T6806] RSP: 0018:ffffc90001637b10 EFLAGS: 00010293 [ 59.289077][ T6806] RAX: ffff8880a903e300 RBX: 0000000000000000 RCX: ffffffff81195061 [ 59.297093][ T6806] RDX: 0000000000000000 RSI: ffffffff81195b4a RDI: 0000000000000001 [ 59.305129][ T6806] RBP: ffff88808dcac040 R08: ffff8880a903e300 R09: ffffed1015cc717c [ 59.313132][ T6806] R10: ffff8880ae638bdb R11: ffffed1015cc717b R12: 0000000000000000 [ 59.321149][ T6806] R13: 0000000000000001 R14: ffff88808dcac458 R15: 0000000000000000 [ 59.329115][ T6806] FS: 00000000023d7880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 59.338089][ T6806] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.344714][ T6806] CR2: 00005570621d1750 CR3: 0000000099ca7000 CR4: 00000000001426f0 [ 59.352732][ T6806] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.362227][ T6806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.370241][ T6806] Kernel panic - not syncing: Fatal exception [ 59.377753][ T6806] Kernel Offset: disabled [ 59.382091][ T6806] Rebooting in 86400 seconds..