[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.247632][ T27] audit: type=1800 audit(1560750708.370:25): pid=8763 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.273364][ T27] audit: type=1800 audit(1560750708.370:26): pid=8763 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.307998][ T27] audit: type=1800 audit(1560750708.370:27): pid=8763 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 '10.128.0.138' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.468948][ T8918] 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. [ 69.762504][ T8919] WARNING: CPU: 0 PID: 8919 at arch/x86/kvm/x86.c:8302 kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 69.772673][ T8919] Kernel panic - not syncing: panic_on_warn set ... [ 69.779245][ T8919] CPU: 0 PID: 8919 Comm: syz-executor797 Not tainted 5.2.0-rc4+ #34 [ 69.787199][ T8919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.797233][ T8919] Call Trace: [ 69.800503][ T8919] dump_stack+0x172/0x1f0 [ 69.804828][ T8919] ? kvm_arch_vcpu_ioctl_run+0x120/0x1740 [ 69.810531][ T8919] panic+0x2cb/0x744 [ 69.814407][ T8919] ? __warn_printk+0xf3/0xf3 [ 69.818979][ T8919] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 69.824681][ T8919] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.830900][ T8919] ? __warn.cold+0x5/0x4d [ 69.835225][ T8919] ? __warn+0xe8/0x1d0 [ 69.839416][ T8919] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 69.845118][ T8919] __warn.cold+0x20/0x4d [ 69.849337][ T8919] ? handle_ept_misconfig+0x3e0/0x3e0 [ 69.854682][ T8919] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 69.860380][ T8919] report_bug+0x263/0x2b0 [ 69.864692][ T8919] do_error_trap+0x11b/0x200 [ 69.869265][ T8919] do_invalid_op+0x37/0x50 [ 69.873663][ T8919] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 69.879360][ T8919] invalid_op+0x14/0x20 [ 69.883497][ T8919] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 69.889802][ T8919] 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 [ 69.909389][ T8919] RSP: 0018:ffff8880a44bfb30 EFLAGS: 00010293 [ 69.915432][ T8919] RAX: ffff88808bcae6c0 RBX: 0000000000000001 RCX: ffffffff810e3c69 [ 69.923379][ T8919] RDX: 0000000000000000 RSI: ffffffff810e2fb8 RDI: 0000000000000005 [ 69.931327][ T8919] RBP: ffff8880a44bfb98 R08: ffff88808bcae6c0 R09: ffffed1015d06be0 [ 69.939278][ T8919] R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: ffff888085f48040 [ 69.947227][ T8919] R13: 0000000000000000 R14: ffff88809684a000 R15: ffff88809fba5380 [ 69.955193][ T8919] ? kvm_arch_vcpu_ioctl_run+0xe89/0x1740 [ 69.960909][ T8919] ? kvm_arch_vcpu_ioctl_run+0x1d8/0x1740 [ 69.966612][ T8919] ? put_pid_ns+0x69/0xe0 [ 69.970926][ T8919] kvm_vcpu_ioctl+0x4dc/0xf90 [ 69.975580][ T8919] ? kvm_set_memory_region+0x50/0x50 [ 69.980843][ T8919] ? tomoyo_path_number_perm+0x263/0x520 [ 69.986455][ T8919] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 69.992330][ T8919] ? __fget+0x35a/0x550 [ 69.996464][ T8919] ? kvm_set_memory_region+0x50/0x50 [ 70.001728][ T8919] do_vfs_ioctl+0xd5f/0x1380 [ 70.006299][ T8919] ? ioctl_preallocate+0x210/0x210 [ 70.011402][ T8919] ? __fget+0x381/0x550 [ 70.015542][ T8919] ? ksys_dup3+0x3e0/0x3e0 [ 70.019938][ T8919] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.026174][ T8919] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.032396][ T8919] ? tomoyo_file_ioctl+0x23/0x30 [ 70.037311][ T8919] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.043529][ T8919] ? security_file_ioctl+0x8d/0xc0 [ 70.048616][ T8919] ksys_ioctl+0xab/0xd0 [ 70.052870][ T8919] __x64_sys_ioctl+0x73/0xb0 [ 70.057438][ T8919] do_syscall_64+0xfd/0x680 [ 70.061940][ T8919] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.067816][ T8919] RIP: 0033:0x448cb9 [ 70.071689][ T8919] 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 [ 70.091296][ T8919] RSP: 002b:00007fb6f0aface8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 70.099688][ T8919] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 0000000000448cb9 [ 70.107646][ T8919] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 70.115595][ T8919] RBP: 00000000006ddc50 R08: 00007fb6f0afb700 R09: 0000000000000000 [ 70.123542][ T8919] R10: 00007fb6f0afb700 R11: 0000000000000246 R12: 00000000006ddc5c [ 70.131489][ T8919] R13: 00007fff2137c86f R14: 00007fb6f0afb9c0 R15: 20c49ba5e353f7cf [ 70.140553][ T8919] Kernel Offset: disabled [ 70.144916][ T8919] Rebooting in 86400 seconds..