[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.345537][ T26] audit: type=1800 audit(1568127376.211:25): pid=8606 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.389304][ T26] audit: type=1800 audit(1568127376.211:26): pid=8606 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.411059][ T26] audit: type=1800 audit(1568127376.211:27): pid=8606 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 '10.128.10.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.718466][ T8759] 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. [ 68.767408][ T8759] ------------[ cut here ]------------ [ 68.773118][ T8759] WARNING: CPU: 0 PID: 8759 at arch/x86/kvm/vmx/vmx.c:4688 handle_desc+0x78/0x90 [ 68.782228][ T8759] Kernel panic - not syncing: panic_on_warn set ... [ 68.788798][ T8759] CPU: 0 PID: 8759 Comm: syz-executor328 Not tainted 5.3.0-rc6-next-20190830 #75 [ 68.797876][ T8759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.807908][ T8759] Call Trace: [ 68.811202][ T8759] dump_stack+0x172/0x1f0 [ 68.815539][ T8759] ? handle_xsetbv+0xc0/0x100 [ 68.820197][ T8759] panic+0x2dc/0x755 [ 68.824065][ T8759] ? add_taint.cold+0x16/0x16 [ 68.828770][ T8759] ? printk+0xba/0xed [ 68.832728][ T8759] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 68.838160][ T8759] ? __warn.cold+0x14/0x3c [ 68.842549][ T8759] ? __warn+0xd9/0x1d0 [ 68.846689][ T8759] ? handle_desc+0x78/0x90 [ 68.851080][ T8759] __warn.cold+0x2f/0x3c [ 68.855303][ T8759] ? report_bug.cold+0x63/0xad [ 68.860043][ T8759] ? handle_desc+0x78/0x90 [ 68.864521][ T8759] report_bug+0x289/0x300 [ 68.868840][ T8759] do_error_trap+0x11b/0x200 [ 68.873418][ T8759] do_invalid_op+0x37/0x50 [ 68.877811][ T8759] ? handle_desc+0x78/0x90 [ 68.882298][ T8759] invalid_op+0x23/0x30 [ 68.886431][ T8759] RIP: 0010:handle_desc+0x78/0x90 [ 68.891434][ T8759] Code: 59 00 31 f6 4c 89 e7 e8 26 d5 f4 ff 31 ff 41 89 c4 89 c6 e8 ca 16 59 00 31 c0 45 85 e4 5b 0f 94 c0 41 5c 5d c3 e8 38 15 59 00 <0f> 0b eb cf e8 1f f6 93 00 eb ab 0f 1f 00 66 2e 0f 1f 84 00 00 00 [ 68.911025][ T8759] RSP: 0018:ffff8880981c79a0 EFLAGS: 00010293 [ 68.917072][ T8759] RAX: ffff88809997e000 RBX: 0000000000000000 RCX: ffffffff811940a6 [ 68.925021][ T8759] RDX: 0000000000000000 RSI: ffffffff811940d8 RDI: 0000000000000007 [ 68.932972][ T8759] RBP: ffff8880981c79b0 R08: ffff88809997e000 R09: ffffed1015d06aed [ 68.940922][ T8759] R10: ffffed1015d06aec R11: ffff8880ae835763 R12: ffff888097628040 [ 68.948876][ T8759] R13: 000000000000002f R14: ffff88809762bc0c R15: ffff888097628070 [ 68.956846][ T8759] ? handle_desc+0x46/0x90 [ 68.961241][ T8759] ? handle_desc+0x78/0x90 [ 68.965635][ T8759] ? handle_wbinvd+0x20/0x20 [ 68.970201][ T8759] vmx_handle_exit+0x299/0x15f0 [ 68.975030][ T8759] vcpu_enter_guest+0x1087/0x6200 [ 68.980037][ T8759] ? handle_emulation_failure+0x4e0/0x4e0 [ 68.985743][ T8759] ? lock_acquire+0x190/0x410 [ 68.990400][ T8759] ? kvm_check_async_pf_completion+0x2d8/0x440 [ 68.996536][ T8759] kvm_arch_vcpu_ioctl_run+0x424/0x1750 [ 69.002067][ T8759] ? kvm_arch_vcpu_ioctl_run+0x424/0x1750 [ 69.007766][ T8759] kvm_vcpu_ioctl+0x4dc/0xf50 [ 69.012433][ T8759] ? kvm_write_guest_cached+0x40/0x40 [ 69.017782][ T8759] ? tomoyo_path_number_perm+0x263/0x520 [ 69.023392][ T8759] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 69.029187][ T8759] ? filename_lookup+0x294/0x410 [ 69.034119][ T8759] ? kvm_write_guest_cached+0x40/0x40 [ 69.039466][ T8759] do_vfs_ioctl+0xdb6/0x13e0 [ 69.044035][ T8759] ? ioctl_preallocate+0x210/0x210 [ 69.049131][ T8759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.055362][ T8759] ? user_path_at_empty+0x43/0x50 [ 69.060378][ T8759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.066605][ T8759] ? tomoyo_file_ioctl+0x23/0x30 [ 69.071532][ T8759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.077750][ T8759] ? security_file_ioctl+0x8d/0xc0 [ 69.082839][ T8759] ksys_ioctl+0xab/0xd0 [ 69.086974][ T8759] __x64_sys_ioctl+0x73/0xb0 [ 69.091543][ T8759] do_syscall_64+0xfa/0x760 [ 69.096029][ T8759] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.101895][ T8759] RIP: 0033:0x443819 [ 69.105769][ T8759] 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 1b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.125346][ T8759] RSP: 002b:00007ffd0b551188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 69.133743][ T8759] RAX: ffffffffffffffda RBX: 00007ffd0b551190 RCX: 0000000000443819 [ 69.141700][ T8759] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 [ 69.149650][ T8759] RBP: 0000000000000000 R08: 00000000004010a0 R09: 00000000004010a0 [ 69.157598][ T8759] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004048c0 [ 69.165560][ T8759] R13: 0000000000404950 R14: 0000000000000000 R15: 0000000000000000 [ 69.175176][ T8759] Kernel Offset: disabled [ 69.179600][ T8759] Rebooting in 86400 seconds..