[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.917148][ T26] audit: type=1800 audit(1573174973.641:25): pid=8534 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.964756][ T26] audit: type=1800 audit(1573174973.641:26): pid=8534 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.986927][ T26] audit: type=1800 audit(1573174973.651:27): pid=8534 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.194' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.713477][ T8688] 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. [ 67.744817][ T8688] ------------[ cut here ]------------ [ 67.750360][ T8688] kernel BUG at arch/x86/kvm/mmu.c:3324! [ 67.756219][ T8688] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 67.762279][ T8688] CPU: 0 PID: 8688 Comm: syz-executor906 Not tainted 5.4.0-rc6+ #0 [ 67.770150][ T8688] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.780282][ T8688] RIP: 0010:transparent_hugepage_adjust+0x490/0x530 [ 67.786871][ T8688] Code: 63 00 48 8b 45 b8 48 83 e8 01 e9 19 fd ff ff e8 36 3c 63 00 48 8b 45 b8 48 83 e8 01 48 89 45 c8 e9 a1 fd ff ff e8 20 3c 63 00 <0f> 0b 48 89 df e8 66 9e 9e 00 e9 9f fb ff ff 4c 89 ff e8 59 9e 9e [ 67.806454][ T8688] RSP: 0018:ffff88809753f690 EFLAGS: 00010293 [ 67.812553][ T8688] RAX: ffff88809549e6c0 RBX: ffff88809753f778 RCX: ffffffff810fe787 [ 67.820543][ T8688] RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 [ 67.828504][ T8688] RBP: ffff88809753f6d8 R08: ffff88809549e6c0 R09: ffffed10131ed682 [ 67.836452][ T8688] R10: ffffed10131ed681 R11: ffff888098f6b40b R12: ffff88809753f768 [ 67.844398][ T8688] R13: 0000000000000083 R14: 000000000008fe81 R15: 0000000000000000 [ 67.852345][ T8688] FS: 000000000158e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 67.861246][ T8688] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.867804][ T8688] CR2: 0000000000000000 CR3: 000000009f2a4000 CR4: 00000000001426f0 [ 67.875767][ T8688] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.883712][ T8688] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.891657][ T8688] Call Trace: [ 67.894930][ T8688] tdp_page_fault+0x56e/0x650 [ 67.899583][ T8688] ? nonpaging_page_fault+0x5c0/0x5c0 [ 67.904939][ T8688] ? __check_heap_object+0x31/0xb3 [ 67.910030][ T8688] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 67.916246][ T8688] ? vmx_vcpu_load_vmcs+0x5d6/0xae0 [ 67.921419][ T8688] ? is_bpf_text_address+0xd3/0x170 [ 67.926593][ T8688] kvm_mmu_page_fault+0x1dd/0x1800 [ 67.931695][ T8688] ? __kasan_check_read+0x11/0x20 [ 67.936694][ T8688] ? mark_lock+0xc2/0x1220 [ 67.941087][ T8688] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 67.947326][ T8688] ? kvm_mmu_invalidate_zap_pages_in_memslot+0x20/0x20 [ 67.954150][ T8688] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 67.960280][ T8688] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.965799][ T8688] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.971761][ T8688] handle_ept_violation+0x259/0x560 [ 67.976935][ T8688] ? vmx_inject_irq+0x5c0/0x5c0 [ 67.981776][ T8688] vmx_handle_exit+0x29f/0x1730 [ 67.986605][ T8688] kvm_arch_vcpu_ioctl_run+0x1cb8/0x70d0 [ 67.992231][ T8688] ? kvm_vcpu_ioctl+0x181/0xfc0 [ 67.997057][ T8688] ? lock_downgrade+0x920/0x920 [ 68.001886][ T8688] ? kvm_arch_vcpu_runnable+0x6e0/0x6e0 [ 68.007407][ T8688] ? lock_downgrade+0x920/0x920 [ 68.012231][ T8688] kvm_vcpu_ioctl+0x4dc/0xfc0 [ 68.016879][ T8688] ? kvm_vcpu_ioctl+0x4dc/0xfc0 [ 68.021703][ T8688] ? vcpu_stat_get_per_vm_open+0x40/0x40 [ 68.027318][ T8688] ? tomoyo_path_number_perm+0x263/0x520 [ 68.032924][ T8688] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 68.038706][ T8688] ? vcpu_stat_get_per_vm_open+0x40/0x40 [ 68.044322][ T8688] do_vfs_ioctl+0xdb6/0x13e0 [ 68.048897][ T8688] ? ioctl_preallocate+0x210/0x210 [ 68.053982][ T8688] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.060210][ T8688] ? debug_smp_processor_id+0x3c/0x214 [ 68.065643][ T8688] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 68.071780][ T8688] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.077300][ T8688] ? tomoyo_file_ioctl+0x23/0x30 [ 68.082212][ T8688] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.088429][ T8688] ? security_file_ioctl+0x8d/0xc0 [ 68.093529][ T8688] ksys_ioctl+0xab/0xd0 [ 68.097659][ T8688] __x64_sys_ioctl+0x73/0xb0 [ 68.102224][ T8688] do_syscall_64+0xfa/0x760 [ 68.106707][ T8688] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.112576][ T8688] RIP: 0033:0x443f49 [ 68.116445][ T8688] 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.136022][ T8688] RSP: 002b:00007ffd991d67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.144407][ T8688] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443f49 [ 68.152372][ T8688] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 [ 68.160324][ T8688] RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 [ 68.168280][ T8688] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000401c50 [ 68.176229][ T8688] R13: 0000000000401ce0 R14: 0000000000000000 R15: 0000000000000000 [ 68.184186][ T8688] Modules linked in: [ 68.188296][ T8688] ---[ end trace 911095bae56804bc ]--- [ 68.193764][ T8688] RIP: 0010:transparent_hugepage_adjust+0x490/0x530 [ 68.200406][ T8688] Code: 63 00 48 8b 45 b8 48 83 e8 01 e9 19 fd ff ff e8 36 3c 63 00 48 8b 45 b8 48 83 e8 01 48 89 45 c8 e9 a1 fd ff ff e8 20 3c 63 00 <0f> 0b 48 89 df e8 66 9e 9e 00 e9 9f fb ff ff 4c 89 ff e8 59 9e 9e [ 68.220026][ T8688] RSP: 0018:ffff88809753f690 EFLAGS: 00010293 [ 68.226098][ T8688] RAX: ffff88809549e6c0 RBX: ffff88809753f778 RCX: ffffffff810fe787 [ 68.234053][ T8688] RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 [ 68.242047][ T8688] RBP: ffff88809753f6d8 R08: ffff88809549e6c0 R09: ffffed10131ed682 [ 68.250018][ T8688] R10: ffffed10131ed681 R11: ffff888098f6b40b R12: ffff88809753f768 [ 68.257994][ T8688] R13: 0000000000000083 R14: 000000000008fe81 R15: 0000000000000000 [ 68.265989][ T8688] FS: 000000000158e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 68.274904][ T8688] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.281508][ T8688] CR2: 0000000000000000 CR3: 000000009f2a4000 CR4: 00000000001426f0 [ 68.289517][ T8688] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.297499][ T8688] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.305459][ T8688] Kernel panic - not syncing: Fatal exception [ 68.312895][ T8688] Kernel Offset: disabled [ 68.317256][ T8688] Rebooting in 86400 seconds..