[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.075348] audit: type=1800 audit(1538089043.375:25): pid=5883 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.100558] audit: type=1800 audit(1538089043.385:26): pid=5883 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.126840] audit: type=1800 audit(1538089043.385:27): pid=5883 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 '10.128.0.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.099130] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details. [ 48.117007] kasan: CONFIG_KASAN_INLINE enabled [ 48.121589] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.129002] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.135266] CPU: 0 PID: 6037 Comm: syz-executor909 Not tainted 4.19.0-rc5-next-20180927+ #82 [ 48.143818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.153172] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 48.158039] Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7b [ 48.176948] RSP: 0018:ffff8801d5387430 EFLAGS: 00010207 [ 48.182297] RAX: dffffc0000000000 RBX: 00000000000001b0 RCX: 0000000000000000 [ 48.189561] RDX: 0000000000000036 RSI: 0000000000000000 RDI: 00000000000001b4 [ 48.196810] RBP: ffff8801d5387458 R08: 0000000000000001 R09: 0000000000000000 [ 48.204058] R10: ffffed0039adc089 R11: 0000000000000000 R12: ffff8801cd6e0430 [ 48.211307] R13: 0000000000000000 R14: 0000000000000007 R15: 0000000000000000 [ 48.218560] FS: 00000000012fe880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 48.226764] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.232621] CR2: 0000000020000280 CR3: 00000001d489d000 CR4: 00000000001426f0 [ 48.239893] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.247230] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.254476] Call Trace: [ 48.257048] _raw_spin_lock+0x35/0x40 [ 48.260836] ? kvm_ioapic_scan_entry+0x7f/0x3c0 [ 48.265489] kvm_ioapic_scan_entry+0x7f/0x3c0 [ 48.269983] vcpu_enter_guest+0x49e2/0x6230 [ 48.274288] ? __mutex_lock+0x85e/0x1700 [ 48.278334] ? emulator_read_emulated+0x50/0x50 [ 48.282998] ? hardware_disable+0x530/0x530 [ 48.287317] ? vmx_vcpu_load+0xb06/0x1030 [ 48.291444] ? tg_nop+0x10/0x10 [ 48.294709] ? vmx_write_tsc_offset+0x670/0x670 [ 48.299363] ? kvm_vcpu_ioctl+0x28c/0x1150 [ 48.303581] ? lock_downgrade+0x900/0x900 [ 48.307712] ? kvm_arch_vcpu_postcreate+0xdf/0x290 [ 48.312634] ? kvm_arch_vcpu_create+0x220/0x220 [ 48.317288] ? lock_acquire+0x1ed/0x520 [ 48.321244] ? kvm_arch_vcpu_ioctl_run+0x22f/0x16e0 [ 48.326244] ? preempt_count_add+0x7d/0x160 [ 48.330546] ? lock_release+0x970/0x970 [ 48.334500] ? kvm_gen_update_masterclock+0x350/0x350 [ 48.339670] ? kvm_arch_dev_ioctl+0x630/0x630 [ 48.344165] ? preempt_notifier_dec+0x20/0x20 [ 48.348643] kvm_arch_vcpu_ioctl_run+0x370/0x16e0 [ 48.353469] ? kvm_arch_vcpu_ioctl_run+0x370/0x16e0 [ 48.358475] kvm_vcpu_ioctl+0x5c8/0x1150 [ 48.362545] ? kvm_vcpu_block+0x1020/0x1020 [ 48.366850] ? is_bpf_text_address+0xd3/0x170 [ 48.371328] ? kernel_text_address+0x79/0xf0 [ 48.375735] ? __kernel_text_address+0xd/0x40 [ 48.380210] ? unwind_get_return_address+0x61/0xa0 [ 48.385129] ? __save_stack_trace+0x8d/0xf0 [ 48.389438] ? save_stack+0xa9/0xd0 [ 48.393044] ? save_stack+0x43/0xd0 [ 48.396651] ? __kasan_slab_free+0x102/0x150 [ 48.401039] ? kasan_slab_free+0xe/0x10 [ 48.404991] ? putname+0xf2/0x130 [ 48.408429] ? do_sys_open+0x54d/0x700 [ 48.412292] ? __x64_sys_openat+0x9d/0x100 [ 48.416508] ? do_syscall_64+0x1b9/0x820 [ 48.420551] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.425901] ? trace_hardirqs_off+0xb8/0x310 [ 48.430291] ? kasan_check_read+0x11/0x20 [ 48.434433] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.438851] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.443859] ? __bpf_trace_initcall_finish+0x2a/0x30 [ 48.448943] ? trace_hardirqs_off+0xb8/0x310 [ 48.453364] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.458367] ? kvm_vcpu_block+0x1020/0x1020 [ 48.462678] do_vfs_ioctl+0x1de/0x1720 [ 48.466558] ? trace_hardirqs_on+0xbd/0x310 [ 48.470857] ? ioctl_preallocate+0x300/0x300 [ 48.475247] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.480777] ? __fget_light+0x2e9/0x430 [ 48.484732] ? fget_raw+0x20/0x20 [ 48.488165] ? putname+0xf2/0x130 [ 48.491598] ? kmem_cache_free+0x21a/0x290 [ 48.495813] ? putname+0xf7/0x130 [ 48.499249] ? security_file_ioctl+0x94/0xc0 [ 48.503637] ksys_ioctl+0xa9/0xd0 [ 48.507071] __x64_sys_ioctl+0x73/0xb0 [ 48.510941] do_syscall_64+0x1b9/0x820 [ 48.514810] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.520157] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.525066] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.529892] ? trace_hardirqs_off+0x310/0x310 [ 48.534366] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.539363] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.544360] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.549186] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.554353] RIP: 0033:0x440099 [ 48.557566] 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 [ 48.576446] RSP: 002b:00007ffc220ff998 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 [ 48.584135] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440099 [ 48.591385] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 48.598637] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 48.605883] R10: 00000000004002c8 R11: 0000000000000207 R12: 0000000000401920 [ 48.613130] R13: 00000000004019b0 R14: 0000000000000000 R15: 0000000000000000 [ 48.620379] Modules linked in: [ 48.623673] ---[ end trace 02c3362b966e365c ]--- [ 48.628467] RIP: 0010:do_raw_spin_lock+0x27/0x200 [ 48.633293] Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7b [ 48.652202] RSP: 0018:ffff8801d5387430 EFLAGS: 00010207 [ 48.657579] RAX: dffffc0000000000 RBX: 00000000000001b0 RCX: 0000000000000000 [ 48.664831] RDX: 0000000000000036 RSI: 0000000000000000 RDI: 00000000000001b4 [ 48.672109] RBP: ffff8801d5387458 R08: 0000000000000001 R09: 0000000000000000 [ 48.679388] R10: ffffed0039adc089 R11: 0000000000000000 R12: ffff8801cd6e0430 [ 48.686669] R13: 0000000000000000 R14: 0000000000000007 R15: 0000000000000000 [ 48.693970] FS: 00000000012fe880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 48.702207] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.708099] CR2: 0000000020000280 CR3: 00000001d489d000 CR4: 00000000001426f0 [ 48.715354] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.722632] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.729910] Kernel panic - not syncing: Fatal exception [ 48.736183] Kernel Offset: disabled [ 48.739803] Rebooting in 86400 seconds..