[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.062973][ T26] audit: type=1800 audit(1568957012.315:25): pid=8603 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.085227][ T26] audit: type=1800 audit(1568957012.315:26): pid=8603 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.121779][ T26] audit: type=1800 audit(1568957012.315:27): pid=8603 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 '10.128.1.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.342730][ 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. [ 66.406195][ T8759] ------------[ cut here ]------------ [ 66.411981][ T8759] WARNING: CPU: 1 PID: 8759 at arch/x86/kvm/vmx/vmx.c:4689 handle_desc+0x78/0x90 [ 66.421076][ T8759] Kernel panic - not syncing: panic_on_warn set ... [ 66.427684][ T8759] CPU: 1 PID: 8759 Comm: syz-executor825 Not tainted 5.3.0-next-20190919 #0 [ 66.436346][ T8759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.446419][ T8759] Call Trace: [ 66.449742][ T8759] dump_stack+0x172/0x1f0 [ 66.454065][ T8759] ? handle_desc+0x60/0x90 [ 66.458468][ T8759] panic+0x2dc/0x755 [ 66.462359][ T8759] ? add_taint.cold+0x16/0x16 [ 66.467038][ T8759] ? printk+0xba/0xed [ 66.471107][ T8759] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 66.476583][ T8759] ? __warn.cold+0x14/0x3c [ 66.480981][ T8759] ? __warn+0xd9/0x1d0 [ 66.485046][ T8759] ? handle_desc+0x78/0x90 [ 66.489445][ T8759] __warn.cold+0x2f/0x3c [ 66.493709][ T8759] ? report_bug.cold+0x63/0xad [ 66.498474][ T8759] ? handle_desc+0x78/0x90 [ 66.502877][ T8759] report_bug+0x289/0x300 [ 66.507203][ T8759] do_error_trap+0x11b/0x200 [ 66.511796][ T8759] do_invalid_op+0x37/0x50 [ 66.516199][ T8759] ? handle_desc+0x78/0x90 [ 66.520605][ T8759] invalid_op+0x23/0x30 [ 66.524767][ T8759] RIP: 0010:handle_desc+0x78/0x90 [ 66.529795][ T8759] Code: 59 00 31 f6 4c 89 e7 e8 16 c9 f4 ff 31 ff 41 89 c4 89 c6 e8 3a 70 59 00 31 c0 45 85 e4 5b 0f 94 c0 41 5c 5d c3 e8 a8 6e 59 00 <0f> 0b eb cf e8 8f df 94 00 eb ab 0f 1f 00 66 2e 0f 1f 84 00 00 00 [ 66.549589][ T8759] RSP: 0018:ffff888099af79a0 EFLAGS: 00010293 [ 66.555650][ T8759] RAX: ffff88809312c040 RBX: 0000000000000000 RCX: ffffffff811966e6 [ 66.563611][ T8759] RDX: 0000000000000000 RSI: ffffffff81196718 RDI: 0000000000000007 [ 66.571591][ T8759] RBP: ffff888099af79b0 R08: ffff88809312c040 R09: ffffed1015d26aed [ 66.579634][ T8759] R10: ffffed1015d26aec R11: ffff8880ae935763 R12: ffff888099ca8040 [ 66.587599][ T8759] R13: 000000000000002f R14: ffffffff811966a0 R15: ffff888099ca8040 [ 66.595592][ T8759] ? handle_wbinvd+0x20/0x20 [ 66.600274][ T8759] ? handle_desc+0x46/0x90 [ 66.604680][ T8759] ? handle_desc+0x78/0x90 [ 66.609087][ T8759] vmx_handle_exit+0x29d/0x1720 [ 66.613922][ T8759] vcpu_enter_guest+0x10d3/0x6110 [ 66.619023][ T8759] ? kvm_gen_update_masterclock+0x2a0/0x2a0 [ 66.625077][ T8759] ? lock_acquire+0x190/0x410 [ 66.629738][ T8759] ? kvm_check_async_pf_completion+0x2d8/0x440 [ 66.635877][ T8759] kvm_arch_vcpu_ioctl_run+0x424/0x1760 [ 66.641421][ T8759] ? kvm_arch_vcpu_ioctl_run+0x424/0x1760 [ 66.647129][ T8759] kvm_vcpu_ioctl+0x4dc/0xfc0 [ 66.651815][ T8759] ? vcpu_stat_get_per_vm_open+0x40/0x40 [ 66.657441][ T8759] ? tomoyo_path_number_perm+0x263/0x520 [ 66.663088][ T8759] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 66.668888][ T8759] ? filename_lookup+0x294/0x3f0 [ 66.673929][ T8759] ? vcpu_stat_get_per_vm_open+0x40/0x40 [ 66.679838][ T8759] do_vfs_ioctl+0xdb6/0x13e0 [ 66.684446][ T8759] ? compat_ioctl_preallocate+0x210/0x210 [ 66.690164][ T8759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.696458][ T8759] ? user_path_at_empty+0x43/0x50 [ 66.701465][ T8759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.707691][ T8759] ? tomoyo_file_ioctl+0x23/0x30 [ 66.712695][ T8759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.718952][ T8759] ? security_file_ioctl+0x8d/0xc0 [ 66.724056][ T8759] ksys_ioctl+0xab/0xd0 [ 66.728227][ T8759] __x64_sys_ioctl+0x73/0xb0 [ 66.732812][ T8759] do_syscall_64+0xfa/0x760 [ 66.737326][ T8759] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.743200][ T8759] RIP: 0033:0x443819 [ 66.747077][ 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 [ 66.766840][ T8759] RSP: 002b:00007ffeb41f3ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 66.775693][ T8759] RAX: ffffffffffffffda RBX: 00007ffeb41f3ef0 RCX: 0000000000443819 [ 66.783690][ T8759] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 [ 66.791648][ T8759] RBP: 0000000000000000 R08: 00000000004010a0 R09: 00000000004010a0 [ 66.799796][ T8759] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004048c0 [ 66.809010][ T8759] R13: 0000000000404950 R14: 0000000000000000 R15: 0000000000000000 [ 66.819157][ T8759] Kernel Offset: disabled [ 66.823556][ T8759] Rebooting in 86400 seconds..