[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.904166][ T26] audit: type=1800 audit(1573293796.055:25): pid=8688 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.926086][ T26] audit: type=1800 audit(1573293796.065:26): pid=8688 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.979587][ T26] audit: type=1800 audit(1573293796.065:27): pid=8688 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 '10.128.0.187' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.312568][ T8844] 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. [ 67.344134][ T8844] ------------[ cut here ]------------ [ 67.349674][ T8844] kernel BUG at arch/x86/kvm/mmu.c:3324! [ 67.355420][ T8844] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 67.361593][ T8844] CPU: 1 PID: 8844 Comm: syz-executor324 Not tainted 5.4.0-rc6+ #0 [ 67.369457][ T8844] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.379868][ T8844] RIP: 0010:transparent_hugepage_adjust+0x490/0x530 [ 67.386522][ T8844] 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 [ 67.406114][ T8844] RSP: 0018:ffff88809985f690 EFLAGS: 00010293 [ 67.412169][ T8844] RAX: ffff888091cc8040 RBX: ffff88809985f778 RCX: ffffffff810fe787 [ 67.420901][ T8844] RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 [ 67.429304][ T8844] RBP: ffff88809985f6d8 R08: ffff888091cc8040 R09: ffffed1011e69682 [ 67.437252][ T8844] R10: ffffed1011e69681 R11: ffff88808f34b40b R12: ffff88809985f768 [ 67.445215][ T8844] R13: 0000000000000063 R14: 0000000000099261 R15: 0000000000000000 [ 67.453511][ T8844] FS: 0000000000f91880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 67.462502][ T8844] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.469058][ T8844] CR2: 0000000000000000 CR3: 00000000903ad000 CR4: 00000000001426e0 [ 67.477008][ T8844] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.484981][ T8844] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.492945][ T8844] Call Trace: [ 67.496221][ T8844] tdp_page_fault+0x56e/0x650 [ 67.500961][ T8844] ? nonpaging_page_fault+0x5c0/0x5c0 [ 67.506573][ T8844] ? __check_heap_object+0x31/0xb3 [ 67.511682][ T8844] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 67.517897][ T8844] ? vmx_vcpu_load_vmcs+0x5d6/0xae0 [ 67.523515][ T8844] ? is_bpf_text_address+0xd3/0x170 [ 67.528690][ T8844] kvm_mmu_page_fault+0x1dd/0x1800 [ 67.533775][ T8844] ? __kasan_check_read+0x11/0x20 [ 67.538779][ T8844] ? mark_lock+0xc2/0x1220 [ 67.543190][ T8844] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 67.549546][ T8844] ? kvm_mmu_invalidate_zap_pages_in_memslot+0x20/0x20 [ 67.556487][ T8844] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 67.563647][ T8844] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.569236][ T8844] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.575204][ T8844] handle_ept_violation+0x259/0x560 [ 67.580393][ T8844] ? vmx_inject_irq+0x5c0/0x5c0 [ 67.585246][ T8844] vmx_handle_exit+0x29f/0x1730 [ 67.590271][ T8844] kvm_arch_vcpu_ioctl_run+0x1cb8/0x70d0 [ 67.595905][ T8844] ? kvm_vcpu_ioctl+0x181/0xfc0 [ 67.600738][ T8844] ? lock_downgrade+0x920/0x920 [ 67.605654][ T8844] ? kvm_arch_vcpu_runnable+0x6e0/0x6e0 [ 67.611272][ T8844] ? lock_downgrade+0x920/0x920 [ 67.616188][ T8844] kvm_vcpu_ioctl+0x4dc/0xfc0 [ 67.620860][ T8844] ? kvm_vcpu_ioctl+0x4dc/0xfc0 [ 67.626563][ T8844] ? vcpu_stat_get_per_vm_open+0x40/0x40 [ 67.632240][ T8844] ? tomoyo_path_number_perm+0x263/0x520 [ 67.637913][ T8844] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 67.643718][ T8844] ? vcpu_stat_get_per_vm_open+0x40/0x40 [ 67.649343][ T8844] do_vfs_ioctl+0xdb6/0x13e0 [ 67.653940][ T8844] ? ioctl_preallocate+0x210/0x210 [ 67.659032][ T8844] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.665440][ T8844] ? debug_smp_processor_id+0x3c/0x214 [ 67.671352][ T8844] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 67.677588][ T8844] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.683120][ T8844] ? tomoyo_file_ioctl+0x23/0x30 [ 67.688047][ T8844] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.694709][ T8844] ? security_file_ioctl+0x8d/0xc0 [ 67.699886][ T8844] ksys_ioctl+0xab/0xd0 [ 67.704020][ T8844] __x64_sys_ioctl+0x73/0xb0 [ 67.708597][ T8844] do_syscall_64+0xfa/0x760 [ 67.713087][ T8844] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.718954][ T8844] RIP: 0033:0x443f49 [ 67.722995][ T8844] 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 [ 67.743283][ T8844] RSP: 002b:00007fff16cb78f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.752301][ T8844] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443f49 [ 67.761476][ T8844] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 [ 67.769424][ T8844] RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 [ 67.777375][ T8844] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000401c50 [ 67.785359][ T8844] R13: 0000000000401ce0 R14: 0000000000000000 R15: 0000000000000000 [ 67.798605][ T8844] Modules linked in: [ 67.802681][ T8844] ---[ end trace d10ea24ec332d832 ]--- [ 67.808179][ T8844] RIP: 0010:transparent_hugepage_adjust+0x490/0x530 [ 67.814791][ T8844] 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 [ 67.834425][ T8844] RSP: 0018:ffff88809985f690 EFLAGS: 00010293 [ 67.840518][ T8844] RAX: ffff888091cc8040 RBX: ffff88809985f778 RCX: ffffffff810fe787 [ 67.848864][ T8844] RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 [ 67.857025][ T8844] RBP: ffff88809985f6d8 R08: ffff888091cc8040 R09: ffffed1011e69682 [ 67.865007][ T8844] R10: ffffed1011e69681 R11: ffff88808f34b40b R12: ffff88809985f768 [ 67.873163][ T8844] R13: 0000000000000063 R14: 0000000000099261 R15: 0000000000000000 [ 67.881157][ T8844] FS: 0000000000f91880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 67.890382][ T8844] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.896973][ T8844] CR2: 0000000000000000 CR3: 00000000903ad000 CR4: 00000000001426e0 [ 67.904952][ T8844] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.912941][ T8844] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.921199][ T8844] Kernel panic - not syncing: Fatal exception [ 67.928622][ T8844] Kernel Offset: disabled [ 67.932945][ T8844] Rebooting in 86400 seconds..