[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.131905][ T26] audit: type=1800 audit(1576183201.075:25): pid=8837 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.160702][ T26] audit: type=1800 audit(1576183201.075:26): pid=8837 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.206559][ T26] audit: type=1800 audit(1576183201.075:27): pid=8837 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 '10.128.0.75' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.438923][ T8988] 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. [ 69.471723][ T8988] ------------[ cut here ]------------ [ 69.477375][ T8988] kernel BUG at arch/x86/kvm/mmu/mmu.c:3416! [ 69.483419][ T8988] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 69.489474][ T8988] CPU: 0 PID: 8988 Comm: syz-executor185 Not tainted 5.5.0-rc1-syzkaller #0 [ 69.498118][ T8988] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.508160][ T8988] RIP: 0010:transparent_hugepage_adjust+0x4c8/0x550 [ 69.514722][ T8988] 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 [ 69.534298][ T8988] RSP: 0018:ffffc90001ef7728 EFLAGS: 00010293 [ 69.540349][ T8988] RAX: ffff888093348340 RBX: ffffc90001ef7818 RCX: ffffffff8116cc87 [ 69.548304][ T8988] RDX: 0000000000000000 RSI: ffffffff8116cdc8 RDI: 0000000000000007 [ 69.556251][ T8988] RBP: ffffc90001ef7770 R08: ffff888093348340 R09: ffffed101161d682 [ 69.564197][ T8988] R10: ffffed101161d681 R11: ffff88808b0eb40b R12: 0000000000000063 [ 69.572141][ T8988] R13: 00000000000a8863 R14: 00000000000a8861 R15: 0000000000000000 [ 69.580096][ T8988] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 69.588996][ T8988] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.595551][ T8988] CR2: 0000000000000000 CR3: 00000000a2a80000 CR4: 00000000001426f0 [ 69.603498][ T8988] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.611468][ T8988] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.619418][ T8988] Call Trace: [ 69.622694][ T8988] tdp_page_fault+0x580/0x6a0 [ 69.627346][ T8988] ? nonpaging_page_fault+0x610/0x610 [ 69.632689][ T8988] ? __kernel_text_address+0xd/0x40 [ 69.637861][ T8988] ? umip_printk.cold+0xa9/0xed [ 69.642686][ T8988] ? profile_setup.cold+0xbb/0xbb [ 69.647688][ T8988] kvm_mmu_page_fault+0x1dd/0x1800 [ 69.652779][ T8988] ? __kasan_check_read+0x11/0x20 [ 69.657798][ T8988] ? mark_lock+0xc2/0x1220 [ 69.662200][ T8988] ? stack_trace_consume_entry+0x190/0x190 [ 69.667984][ T8988] ? kvm_nx_lpage_recovery_worker+0x7f0/0x7f0 [ 69.674035][ T8988] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 69.680163][ T8988] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.685689][ T8988] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.691654][ T8988] handle_ept_violation+0x259/0x560 [ 69.696826][ T8988] ? vmx_inject_irq+0x5c0/0x5c0 [ 69.701674][ T8988] vmx_handle_exit+0x29f/0x1730 [ 69.706507][ T8988] vcpu_enter_guest+0x334f/0x6110 [ 69.711505][ T8988] ? mark_held_locks+0xf0/0xf0 [ 69.716246][ T8988] ? kvm_vcpu_reload_apic_access_page+0x370/0x370 [ 69.722631][ T8988] ? lock_acquire+0x190/0x410 [ 69.727282][ T8988] ? kvm_check_async_pf_completion+0x2d8/0x440 [ 69.733421][ T8988] kvm_arch_vcpu_ioctl_run+0x430/0x17b0 [ 69.738941][ T8988] ? kvm_arch_vcpu_ioctl_run+0x430/0x17b0 [ 69.744644][ T8988] kvm_vcpu_ioctl+0x4dc/0xfc0 [ 69.749303][ T8988] ? kvm_clear_dirty_log_protect+0x820/0x820 [ 69.755266][ T8988] ? __do_page_fault+0x56a/0xd80 [ 69.760184][ T8988] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.766408][ T8988] ? debug_smp_processor_id+0x33/0x18a [ 69.771842][ T8988] kvm_vcpu_compat_ioctl+0x1c4/0x3a0 [ 69.777097][ T8988] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.782615][ T8988] ? kvm_vcpu_ioctl+0xfc0/0xfc0 [ 69.787440][ T8988] ? tomoyo_file_ioctl+0x23/0x30 [ 69.792351][ T8988] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.798562][ T8988] ? security_file_ioctl+0x8d/0xc0 [ 69.803647][ T8988] __ia32_compat_sys_ioctl+0x233/0x610 [ 69.809078][ T8988] ? kvm_vcpu_ioctl+0xfc0/0xfc0 [ 69.813931][ T8988] do_fast_syscall_32+0x27b/0xe16 [ 69.818949][ T8988] entry_SYSENTER_compat+0x70/0x7f [ 69.824039][ T8988] RIP: 0023:0xf7f79a39 [ 69.828084][ T8988] 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 [ 69.847664][ T8988] RSP: 002b:00000000ffc4c58c EFLAGS: 00000286 ORIG_RAX: 0000000000000036 [ 69.856051][ T8988] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000000ae80 [ 69.864003][ T8988] RDX: 0000000000000000 RSI: 00000000080ea0a8 RDI: 00000000ffc4c5e0 [ 69.871952][ T8988] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 69.879901][ T8988] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 69.887847][ T8988] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 69.895957][ T8988] Modules linked in: [ 69.900305][ T8988] ---[ end trace a40eff2544dcf0dd ]--- [ 69.905812][ T8988] RIP: 0010:transparent_hugepage_adjust+0x4c8/0x550 [ 69.912406][ T8988] 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 [ 69.932016][ T8988] RSP: 0018:ffffc90001ef7728 EFLAGS: 00010293 [ 69.938070][ T8988] RAX: ffff888093348340 RBX: ffffc90001ef7818 RCX: ffffffff8116cc87 [ 69.946048][ T8988] RDX: 0000000000000000 RSI: ffffffff8116cdc8 RDI: 0000000000000007 [ 69.954025][ T8988] RBP: ffffc90001ef7770 R08: ffff888093348340 R09: ffffed101161d682 [ 69.962010][ T8988] R10: ffffed101161d681 R11: ffff88808b0eb40b R12: 0000000000000063 [ 69.969972][ T8988] R13: 00000000000a8863 R14: 00000000000a8861 R15: 0000000000000000 [ 69.977956][ T8988] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 69.986888][ T8988] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.993477][ T8988] CR2: 0000000000000000 CR3: 00000000a2a80000 CR4: 00000000001426f0 [ 70.001453][ T8988] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.009404][ T8988] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.017379][ T8988] Kernel panic - not syncing: Fatal exception [ 70.024828][ T8988] Kernel Offset: disabled [ 70.029150][ T8988] Rebooting in 86400 seconds..