[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 54.879623][ T26] audit: type=1800 audit(1573330173.216:25): pid=8567 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.901020][ T26] audit: type=1800 audit(1573330173.226:26): pid=8567 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 54.921629][ T26] audit: type=1800 audit(1573330173.226:27): pid=8567 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 '10.128.1.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.080128][ T8719] 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. [ 73.111738][ T8719] ------------[ cut here ]------------ [ 73.117295][ T8719] kernel BUG at arch/x86/kvm/mmu.c:3324! [ 73.123038][ T8719] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 73.129093][ T8719] CPU: 0 PID: 8719 Comm: syz-executor309 Not tainted 5.4.0-rc6+ #0 [ 73.136952][ T8719] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.146993][ T8719] RIP: 0010:transparent_hugepage_adjust+0x490/0x530 [ 73.153555][ T8719] 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 86 9e 9e 00 e9 9f fb ff ff 4c 89 ff e8 79 9e 9e [ 73.173172][ T8719] RSP: 0018:ffff8880a978f740 EFLAGS: 00010293 [ 73.179211][ T8719] RAX: ffff8880a05083c0 RBX: ffff8880a978f828 RCX: ffffffff810fe787 [ 73.187157][ T8719] RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 [ 73.195118][ T8719] RBP: ffff8880a978f788 R08: ffff8880a05083c0 R09: ffffed101248d682 [ 73.203065][ T8719] R10: ffffed101248d681 R11: ffff88809246b40b R12: ffff8880a978f818 [ 73.211042][ T8719] R13: 0000000000000103 R14: 000000000009a101 R15: 0000000000000000 [ 73.218989][ T8719] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 73.227889][ T8719] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.234444][ T8719] CR2: 0000000000000000 CR3: 0000000094bcc000 CR4: 00000000001426f0 [ 73.242390][ T8719] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.251414][ T8719] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.259975][ T8719] Call Trace: [ 73.263252][ T8719] tdp_page_fault+0x56e/0x650 [ 73.267908][ T8719] ? nonpaging_page_fault+0x5c0/0x5c0 [ 73.273262][ T8719] ? sched_set_itmt_core_prio+0x150/0x1d0 [ 73.278957][ T8719] ? profile_setup.cold+0xbb/0xbb [ 73.283956][ T8719] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 73.290169][ T8719] ? vmx_vcpu_load_vmcs+0x5d6/0xae0 [ 73.295341][ T8719] kvm_mmu_page_fault+0x1dd/0x1800 [ 73.300427][ T8719] ? __kasan_check_read+0x11/0x20 [ 73.305426][ T8719] ? mark_lock+0xc2/0x1220 [ 73.309822][ T8719] ? kvm_mmu_invalidate_zap_pages_in_memslot+0x20/0x20 [ 73.316645][ T8719] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 73.322772][ T8719] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 73.328293][ T8719] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 73.334254][ T8719] handle_ept_violation+0x259/0x560 [ 73.339428][ T8719] ? vmx_inject_irq+0x5c0/0x5c0 [ 73.344269][ T8719] vmx_handle_exit+0x29f/0x1730 [ 73.349100][ T8719] kvm_arch_vcpu_ioctl_run+0x1cb8/0x70d0 [ 73.354705][ T8719] ? tomoyo_path_number_perm+0x214/0x520 [ 73.360308][ T8719] ? kvm_vcpu_ioctl+0x181/0xfc0 [ 73.365135][ T8719] ? kvm_arch_vcpu_runnable+0x6e0/0x6e0 [ 73.370657][ T8719] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 73.377303][ T8719] ? tomoyo_path_number_perm+0x263/0x520 [ 73.382910][ T8719] kvm_vcpu_ioctl+0x4dc/0xfc0 [ 73.387558][ T8719] ? kvm_vcpu_ioctl+0x4dc/0xfc0 [ 73.392388][ T8719] ? vcpu_stat_get_per_vm_open+0x40/0x40 [ 73.397995][ T8719] ? __do_page_fault+0x56a/0xdd0 [ 73.402916][ T8719] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.409127][ T8719] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.415342][ T8719] ? debug_smp_processor_id+0x3c/0x214 [ 73.420773][ T8719] kvm_vcpu_compat_ioctl+0x1c4/0x3a0 [ 73.426034][ T8719] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 73.431551][ T8719] ? kvm_vcpu_ioctl+0xfc0/0xfc0 [ 73.436377][ T8719] ? tomoyo_file_ioctl+0x23/0x30 [ 73.448060][ T8719] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.454282][ T8719] ? security_file_ioctl+0x8d/0xc0 [ 73.459367][ T8719] ? kvm_vcpu_ioctl+0xfc0/0xfc0 [ 73.464191][ T8719] __ia32_compat_sys_ioctl+0x195/0x620 [ 73.470337][ T8719] do_fast_syscall_32+0x27b/0xdb3 [ 73.475333][ T8719] entry_SYSENTER_compat+0x70/0x7f [ 73.480413][ T8719] RIP: 0023:0xf7f36a39 [ 73.484458][ T8719] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 73.504034][ T8719] RSP: 002b:00000000ffee523c EFLAGS: 00000217 ORIG_RAX: 0000000000000036 [ 73.512416][ T8719] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000000ae80 [ 73.520362][ T8719] RDX: 0000000000000000 RSI: 0000000000000036 RDI: 0000000000000006 [ 73.528316][ T8719] RBP: 000000000000ae80 R08: 0000000000000000 R09: 0000000000000000 [ 73.536260][ T8719] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 73.544213][ T8719] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 73.552165][ T8719] Modules linked in: [ 73.556391][ T8719] ---[ end trace be4773b2e784e245 ]--- [ 73.561879][ T8719] RIP: 0010:transparent_hugepage_adjust+0x490/0x530 [ 73.568481][ T8719] 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 86 9e 9e 00 e9 9f fb ff ff 4c 89 ff e8 79 9e 9e [ 73.588521][ T8719] RSP: 0018:ffff8880a978f740 EFLAGS: 00010293 [ 73.594589][ T8719] RAX: ffff8880a05083c0 RBX: ffff8880a978f828 RCX: ffffffff810fe787 [ 73.602559][ T8719] RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 [ 73.610765][ T8719] RBP: ffff8880a978f788 R08: ffff8880a05083c0 R09: ffffed101248d682 [ 73.618737][ T8719] R10: ffffed101248d681 R11: ffff88809246b40b R12: ffff8880a978f818 [ 73.626710][ T8719] R13: 0000000000000103 R14: 000000000009a101 R15: 0000000000000000 [ 73.634686][ T8719] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 73.643615][ T8719] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.650171][ T8719] CR2: 0000000000000000 CR3: 0000000094bcc000 CR4: 00000000001426f0 [ 73.658148][ T8719] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.666194][ T8719] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.674183][ T8719] Kernel panic - not syncing: Fatal exception [ 73.681451][ T8719] Kernel Offset: disabled [ 73.685771][ T8719] Rebooting in 86400 seconds..