[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.573977][ T27] audit: type=1800 audit(1576165876.113:25): pid=8926 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.594780][ T27] audit: type=1800 audit(1576165876.113:26): pid=8926 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.644038][ T27] audit: type=1800 audit(1576165876.113:27): pid=8926 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 '10.128.0.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.810466][ T9080] 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. [ 73.845498][ T9080] ------------[ cut here ]------------ [ 73.851030][ T9080] kernel BUG at arch/x86/kvm/mmu/mmu.c:3416! [ 73.857190][ T9080] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 73.863249][ T9080] CPU: 0 PID: 9080 Comm: syz-executor708 Not tainted 5.5.0-rc1-syzkaller #0 [ 73.871901][ T9080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.881948][ T9080] RIP: 0010:transparent_hugepage_adjust+0x4c8/0x550 [ 73.888515][ T9080] Code: ff ff e8 eb 5d 5e 00 48 8b 45 b8 48 83 e8 01 48 89 45 c8 e9 a3 fd ff ff 48 89 df e8 c2 f8 9b 00 e9 7b fb ff ff e8 c8 5d 5e 00 <0f> 0b 48 8b 7d c8 e8 ad f8 9b 00 e9 ba fc ff ff 49 8d 7f 30 e8 7f [ 73.908272][ T9080] RSP: 0018:ffffc90001e77678 EFLAGS: 00010293 [ 73.914315][ T9080] RAX: ffff8880a443a040 RBX: ffffc90001e77768 RCX: ffffffff8116cc87 [ 73.922300][ T9080] RDX: 0000000000000000 RSI: ffffffff8116cdc8 RDI: 0000000000000007 [ 73.930245][ T9080] RBP: ffffc90001e776c0 R08: ffff8880a443a040 R09: ffffed1011875682 [ 73.938197][ T9080] R10: ffffed1011875681 R11: ffff88808c3ab40b R12: 00000000000001e3 [ 73.946148][ T9080] R13: 0000000000098be3 R14: 0000000000098be1 R15: 0000000000000000 [ 73.954100][ T9080] FS: 0000000001b85880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 73.963001][ T9080] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.969558][ T9080] CR2: 0000000000000000 CR3: 00000000a8fef000 CR4: 00000000001426f0 [ 73.977507][ T9080] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.985463][ T9080] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.993408][ T9080] Call Trace: [ 73.996680][ T9080] tdp_page_fault+0x580/0x6a0 [ 74.001331][ T9080] ? nonpaging_page_fault+0x610/0x610 [ 74.006680][ T9080] ? is_bpf_text_address+0xce/0x160 [ 74.011853][ T9080] kvm_mmu_page_fault+0x1dd/0x1800 [ 74.016941][ T9080] ? __kasan_check_read+0x11/0x20 [ 74.021940][ T9080] ? mark_lock+0xc2/0x1220 [ 74.026332][ T9080] ? arch_stack_walk+0x97/0xf0 [ 74.031081][ T9080] ? kvm_nx_lpage_recovery_worker+0x7f0/0x7f0 [ 74.037131][ T9080] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 74.043260][ T9080] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 74.048788][ T9080] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 74.054757][ T9080] handle_ept_violation+0x259/0x560 [ 74.059968][ T9080] ? vmx_inject_irq+0x5c0/0x5c0 [ 74.064826][ T9080] vmx_handle_exit+0x29f/0x1730 [ 74.069665][ T9080] vcpu_enter_guest+0x334f/0x6110 [ 74.074673][ T9080] ? mark_held_locks+0xf0/0xf0 [ 74.079425][ T9080] ? kvm_vcpu_reload_apic_access_page+0x370/0x370 [ 74.085839][ T9080] ? lock_acquire+0x190/0x410 [ 74.090503][ T9080] ? kvm_check_async_pf_completion+0x2d8/0x440 [ 74.096660][ T9080] kvm_arch_vcpu_ioctl_run+0x430/0x17b0 [ 74.102210][ T9080] ? kvm_arch_vcpu_ioctl_run+0x430/0x17b0 [ 74.107912][ T9080] kvm_vcpu_ioctl+0x4dc/0xfc0 [ 74.112567][ T9080] ? kvm_clear_dirty_log_protect+0x820/0x820 [ 74.118521][ T9080] ? tomoyo_path_number_perm+0x25e/0x520 [ 74.124131][ T9080] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 74.129929][ T9080] ? __do_page_fault+0x56a/0xd80 [ 74.134854][ T9080] ? kvm_clear_dirty_log_protect+0x820/0x820 [ 74.140809][ T9080] do_vfs_ioctl+0x977/0x14e0 [ 74.145376][ T9080] ? compat_ioctl_preallocate+0x220/0x220 [ 74.151082][ T9080] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.157324][ T9080] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 74.163455][ T9080] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 74.168982][ T9080] ? tomoyo_file_ioctl+0x23/0x30 [ 74.173911][ T9080] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.180131][ T9080] ? security_file_ioctl+0x8d/0xc0 [ 74.185229][ T9080] ksys_ioctl+0xab/0xd0 [ 74.189368][ T9080] __x64_sys_ioctl+0x73/0xb0 [ 74.193937][ T9080] do_syscall_64+0xfa/0x790 [ 74.198417][ T9080] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.204292][ T9080] RIP: 0033:0x440379 [ 74.208165][ T9080] 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 [ 74.227752][ T9080] RSP: 002b:00007ffd4dc25a68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 74.236149][ T9080] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440379 [ 74.244105][ T9080] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 [ 74.252088][ T9080] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 74.260072][ T9080] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401c00 [ 74.268021][ T9080] R13: 0000000000401c90 R14: 0000000000000000 R15: 0000000000000000 [ 74.275971][ T9080] Modules linked in: [ 74.279954][ T9080] ---[ end trace 9548970d3d48a85a ]--- [ 74.285440][ T9080] RIP: 0010:transparent_hugepage_adjust+0x4c8/0x550 [ 74.292021][ T9080] Code: ff ff e8 eb 5d 5e 00 48 8b 45 b8 48 83 e8 01 48 89 45 c8 e9 a3 fd ff ff 48 89 df e8 c2 f8 9b 00 e9 7b fb ff ff e8 c8 5d 5e 00 <0f> 0b 48 8b 7d c8 e8 ad f8 9b 00 e9 ba fc ff ff 49 8d 7f 30 e8 7f [ 74.311869][ T9080] RSP: 0018:ffffc90001e77678 EFLAGS: 00010293 [ 74.317969][ T9080] RAX: ffff8880a443a040 RBX: ffffc90001e77768 RCX: ffffffff8116cc87 [ 74.325973][ T9080] RDX: 0000000000000000 RSI: ffffffff8116cdc8 RDI: 0000000000000007 [ 74.333953][ T9080] RBP: ffffc90001e776c0 R08: ffff8880a443a040 R09: ffffed1011875682 [ 74.341999][ T9080] R10: ffffed1011875681 R11: ffff88808c3ab40b R12: 00000000000001e3 [ 74.349984][ T9080] R13: 0000000000098be3 R14: 0000000000098be1 R15: 0000000000000000 [ 74.357979][ T9080] FS: 0000000001b85880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 74.366936][ T9080] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.373507][ T9080] CR2: 0000000000000000 CR3: 00000000a8fef000 CR4: 00000000001426f0 [ 74.381495][ T9080] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.389503][ T9080] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.397480][ T9080] Kernel panic - not syncing: Fatal exception [ 74.404495][ T9080] Kernel Offset: disabled [ 74.408816][ T9080] Rebooting in 86400 seconds..