[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.586330][ T26] audit: type=1800 audit(1560739840.886:25): pid=8998 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.608971][ T26] audit: type=1800 audit(1560739840.896:26): pid=8998 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.678553][ T26] audit: type=1800 audit(1560739840.896:27): pid=8998 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 '10.128.0.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.723317][ T9152] 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. [ 78.048756][ T9153] WARNING: CPU: 1 PID: 9153 at arch/x86/kvm/x86.c:8302 kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 78.059078][ T9153] Kernel panic - not syncing: panic_on_warn set ... [ 78.065663][ T9153] CPU: 1 PID: 9153 Comm: syz-executor142 Not tainted 5.2.0-rc4+ #53 [ 78.073668][ T9153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.083737][ T9153] Call Trace: [ 78.087054][ T9153] dump_stack+0x172/0x1f0 [ 78.091391][ T9153] ? kvm_arch_vcpu_ioctl_run+0x120/0x1740 [ 78.097130][ T9153] panic+0x2cb/0x744 [ 78.101030][ T9153] ? __warn_printk+0xf3/0xf3 [ 78.105624][ T9153] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 78.111360][ T9153] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.117626][ T9153] ? __warn.cold+0x5/0x4d [ 78.121967][ T9153] ? __warn+0xe8/0x1d0 [ 78.126074][ T9153] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 78.131800][ T9153] __warn.cold+0x20/0x4d [ 78.136059][ T9153] ? handle_ept_misconfig+0x3e0/0x3e0 [ 78.141452][ T9153] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 78.147175][ T9153] report_bug+0x263/0x2b0 [ 78.151520][ T9153] do_error_trap+0x11b/0x200 [ 78.156108][ T9153] do_invalid_op+0x37/0x50 [ 78.160513][ T9153] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 78.166225][ T9153] invalid_op+0x14/0x20 [ 78.170378][ T9153] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 78.176692][ T9153] Code: 80 3c 02 00 0f 85 09 14 00 00 49 8b 9c 24 18 0d 00 00 31 ff 48 89 de e8 56 93 62 00 48 85 db 0f 84 77 0c 00 00 e8 a8 91 62 00 <0f> 0b e8 a1 91 62 00 49 8d 7e 01 48 b8 00 00 00 00 00 fc ff df 48 [ 78.196289][ T9153] RSP: 0018:ffff8880a0a6fb30 EFLAGS: 00010293 [ 78.202341][ T9153] RAX: ffff8880863945c0 RBX: 0000000000000001 RCX: ffffffff810e3c69 [ 78.210321][ T9153] RDX: 0000000000000000 RSI: ffffffff810e2fb8 RDI: 0000000000000005 [ 78.218300][ T9153] RBP: ffff8880a0a6fb98 R08: ffff8880863945c0 R09: ffffed1015d26be0 [ 78.226257][ T9153] R10: ffffed1015d26bdf R11: ffff8880ae935efb R12: ffff8880a4048040 [ 78.234216][ T9153] R13: 0000000000000000 R14: ffff8880937c8000 R15: ffff8880a38d2680 [ 78.242214][ T9153] ? kvm_arch_vcpu_ioctl_run+0xe89/0x1740 [ 78.247925][ T9153] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 78.254163][ T9153] ? put_pid_ns+0x69/0xe0 [ 78.258483][ T9153] kvm_vcpu_ioctl+0x4dc/0xf90 [ 78.263140][ T9153] ? kvm_set_memory_region+0x50/0x50 [ 78.268452][ T9153] ? tomoyo_path_number_perm+0x263/0x520 [ 78.274086][ T9153] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 78.279889][ T9153] ? __fget+0x35a/0x550 [ 78.284031][ T9153] ? kvm_set_memory_region+0x50/0x50 [ 78.289313][ T9153] do_vfs_ioctl+0xd5f/0x1380 [ 78.293892][ T9153] ? ioctl_preallocate+0x210/0x210 [ 78.298993][ T9153] ? __fget+0x381/0x550 [ 78.303132][ T9153] ? ksys_dup3+0x3e0/0x3e0 [ 78.307547][ T9153] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.313777][ T9153] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.320006][ T9153] ? tomoyo_file_ioctl+0x23/0x30 [ 78.324928][ T9153] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.331166][ T9153] ? security_file_ioctl+0x8d/0xc0 [ 78.336259][ T9153] ksys_ioctl+0xab/0xd0 [ 78.340405][ T9153] __x64_sys_ioctl+0x73/0xb0 [ 78.345002][ T9153] do_syscall_64+0xfd/0x680 [ 78.349496][ T9153] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.355399][ T9153] RIP: 0033:0x448cb9 [ 78.359285][ T9153] Code: e8 8c b0 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 4b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 78.378879][ T9153] RSP: 002b:00007ff6ad8dcce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 78.387291][ T9153] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 0000000000448cb9 [ 78.395251][ T9153] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 78.403206][ T9153] RBP: 00000000006ddc50 R08: 00007ff6ad8dd700 R09: 0000000000000000 [ 78.411274][ T9153] R10: 00007ff6ad8dd700 R11: 0000000000000246 R12: 00000000006ddc5c [ 78.419245][ T9153] R13: 00007ffdd645a21f R14: 00007ff6ad8dd9c0 R15: 20c49ba5e353f7cf [ 78.428375][ T9153] Kernel Offset: disabled [ 78.432792][ T9153] Rebooting in 86400 seconds..