[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 64.368482][ T26] audit: type=1800 audit(1560761764.829:25): pid=8697 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 64.403168][ T26] audit: type=1800 audit(1560761764.829:26): pid=8697 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 64.446423][ T26] audit: type=1800 audit(1560761764.829:27): pid=8697 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.10.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.532620][ T8854] 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. [ 74.821863][ T8855] WARNING: CPU: 0 PID: 8855 at arch/x86/kvm/x86.c:8302 kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 74.832068][ T8855] Kernel panic - not syncing: panic_on_warn set ... [ 74.838665][ T8855] CPU: 0 PID: 8855 Comm: syz-executor150 Not tainted 5.2.0-rc4+ #34 [ 74.846619][ T8855] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.856677][ T8855] Call Trace: [ 74.859985][ T8855] dump_stack+0x172/0x1f0 [ 74.864313][ T8855] ? kvm_arch_vcpu_ioctl_run+0x120/0x1740 [ 74.870042][ T8855] panic+0x2cb/0x744 [ 74.873927][ T8855] ? __warn_printk+0xf3/0xf3 [ 74.878518][ T8855] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 74.884339][ T8855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.890579][ T8855] ? __warn.cold+0x5/0x4d [ 74.894910][ T8855] ? __warn+0xe8/0x1d0 [ 74.898966][ T8855] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 74.904669][ T8855] __warn.cold+0x20/0x4d [ 74.908921][ T8855] ? handle_ept_misconfig+0x3e0/0x3e0 [ 74.914276][ T8855] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 74.920027][ T8855] report_bug+0x263/0x2b0 [ 74.924352][ T8855] do_error_trap+0x11b/0x200 [ 74.928931][ T8855] do_invalid_op+0x37/0x50 [ 74.933348][ T8855] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 74.939057][ T8855] invalid_op+0x14/0x20 [ 74.943195][ T8855] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 74.949524][ T8855] 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 [ 74.969127][ T8855] RSP: 0018:ffff8880a4877b30 EFLAGS: 00010293 [ 74.975176][ T8855] RAX: ffff88808c426680 RBX: 0000000000000001 RCX: ffffffff810e3c69 [ 74.983144][ T8855] RDX: 0000000000000000 RSI: ffffffff810e2fb8 RDI: 0000000000000005 [ 74.991188][ T8855] RBP: ffff8880a4877b98 R08: ffff88808c426680 R09: ffffed1015d06be0 [ 74.999231][ T8855] R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: ffff88808ca38040 [ 75.007189][ T8855] R13: 0000000000000000 R14: ffff888091c83000 R15: ffff88809d6bf480 [ 75.015167][ T8855] ? kvm_arch_vcpu_ioctl_run+0xe89/0x1740 [ 75.020873][ T8855] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 75.026579][ T8855] ? put_pid_ns+0x69/0xe0 [ 75.030889][ T8855] kvm_vcpu_ioctl+0x4dc/0xf90 [ 75.035548][ T8855] ? kvm_set_memory_region+0x50/0x50 [ 75.040845][ T8855] ? tomoyo_path_number_perm+0x263/0x520 [ 75.046467][ T8855] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 75.052278][ T8855] ? __fget+0x35a/0x550 [ 75.056418][ T8855] ? kvm_set_memory_region+0x50/0x50 [ 75.061695][ T8855] do_vfs_ioctl+0xd5f/0x1380 [ 75.066271][ T8855] ? ioctl_preallocate+0x210/0x210 [ 75.071379][ T8855] ? smack_file_ioctl+0x196/0x310 [ 75.076407][ T8855] ? smack_inode_rename+0x2d0/0x2d0 [ 75.081592][ T8855] ? ksys_dup3+0x3e0/0x3e0 [ 75.086048][ T8855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.092273][ T8855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.098584][ T8855] ? tomoyo_file_ioctl+0x23/0x30 [ 75.103504][ T8855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.109741][ T8855] ? security_file_ioctl+0x8d/0xc0 [ 75.114837][ T8855] ksys_ioctl+0xab/0xd0 [ 75.118976][ T8855] __x64_sys_ioctl+0x73/0xb0 [ 75.123556][ T8855] do_syscall_64+0xfd/0x680 [ 75.128045][ T8855] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.133931][ T8855] RIP: 0033:0x448cb9 [ 75.137811][ T8855] 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 [ 75.157422][ T8855] RSP: 002b:00007f5277df2ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 75.165846][ T8855] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 0000000000448cb9 [ 75.173815][ T8855] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 75.181768][ T8855] RBP: 00000000006ddc50 R08: 00007f5277df3700 R09: 0000000000000000 [ 75.189823][ T8855] R10: 00007f5277df3700 R11: 0000000000000246 R12: 00000000006ddc5c [ 75.197776][ T8855] R13: 00007ffe3b07e3cf R14: 00007f5277df39c0 R15: 20c49ba5e353f7cf [ 75.207134][ T8855] Kernel Offset: disabled [ 75.211518][ T8855] Rebooting in 86400 seconds..