[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.41' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 482.236823] audit: type=1400 audit(1588062375.069:8): avc: denied { execmem } for pid=6436 comm="syz-executor314" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 482.248358] 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. [ 482.307026] faulting far call emulation tainted memory [ 482.546196] ------------[ cut here ]------------ [ 482.555464] WARNING: CPU: 0 PID: 6441 at arch/x86/kvm/x86.c:8108 kvm_arch_vcpu_ioctl_run.cold+0x11/0x18 [ 482.569601] Kernel panic - not syncing: panic_on_warn set ... [ 482.569601] [ 482.581807] CPU: 0 PID: 6441 Comm: syz-executor314 Not tainted 4.19.118-syzkaller #0 [ 482.591720] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 482.601849] Call Trace: [ 482.604712] dump_stack+0x188/0x20d [ 482.608853] panic+0x26a/0x50e [ 482.613058] ? __warn_printk+0xf3/0xf3 [ 482.617851] ? kvm_arch_vcpu_ioctl_run.cold+0x11/0x18 [ 482.623939] ? __probe_kernel_read+0x16c/0x1b0 [ 482.629769] ? __warn.cold+0x5/0x46 [ 482.634093] ? __warn+0xe4/0x1c0 [ 482.638093] ? kvm_arch_vcpu_ioctl_run.cold+0x11/0x18 [ 482.643775] __warn.cold+0x20/0x46 [ 482.647639] ? kvm_arch_vcpu_ioctl_run.cold+0x11/0x18 [ 482.653171] report_bug+0x262/0x2a0 [ 482.657733] do_error_trap+0x1d7/0x310 [ 482.661952] ? math_error+0x310/0x310 [ 482.666164] ? irq_work_queue+0x2b/0x80 [ 482.670961] ? wake_up_klogd+0x8c/0xc0 [ 482.676145] ? vprintk_emit+0x1d0/0x6e0 [ 482.681354] ? trace_hardirqs_off_caller+0x55/0x210 [ 482.686599] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 482.692462] invalid_op+0x14/0x20 [ 482.696171] RIP: 0010:kvm_arch_vcpu_ioctl_run.cold+0x11/0x18 [ 482.702153] Code: 79 ff ff e8 4e f2 59 00 48 c7 c7 60 47 82 87 e8 4b 11 45 00 e9 7d 87 ff ff e8 38 f2 59 00 48 c7 c7 00 2d 82 87 e8 35 11 45 00 <0f> 0b e9 8b c5 ff ff e8 20 f2 59 00 48 c7 c7 00 2d 82 87 e8 1d 11 [ 482.722516] RSP: 0018:ffff8880a760fb60 EFLAGS: 00010282 [ 482.728093] RAX: 0000000000000024 RBX: ffff88809aa3d000 RCX: 0000000000000000 [ 482.736034] RDX: 0000000000000000 RSI: ffffffff8152da91 RDI: ffffed1014ec1f5e [ 482.743474] RBP: ffff8880a6ab0040 R08: 0000000000000024 R09: ffffed1015cc5079 [ 482.751225] R10: ffffed1015cc5078 R11: ffff8880ae6283c7 R12: 0000000000000001 [ 482.758618] R13: ffff8880a6ab045c R14: 0000000000000000 R15: ffff8880a6ab0118 [ 482.766663] ? vprintk_func+0x81/0x17e [ 482.770947] kvm_vcpu_ioctl+0x493/0xe20 [ 482.775438] ? kvm_vcpu_block+0xc40/0xc40 [ 482.780338] ? mark_held_locks+0xf0/0xf0 [ 482.785257] ? __lock_acquire+0x6ee/0x49c0 [ 482.789833] ? find_held_lock+0x2d/0x110 [ 482.794312] ? __fget+0x319/0x510 [ 482.798055] ? kvm_vcpu_block+0xc40/0xc40 [ 482.802215] do_vfs_ioctl+0xcda/0x12e0 [ 482.806615] ? selinux_file_ioctl+0x125/0x5d0 [ 482.811302] ? check_preemption_disabled+0x41/0x280 [ 482.816590] ? ioctl_preallocate+0x200/0x200 [ 482.821015] ? selinux_file_mprotect+0x600/0x600 [ 482.825779] ? __fget+0x340/0x510 [ 482.829499] ? iterate_fd+0x350/0x350 [ 482.833607] ? security_file_ioctl+0x6c/0xb0 [ 482.838431] ksys_ioctl+0x9b/0xc0 [ 482.841897] __x64_sys_ioctl+0x6f/0xb0 [ 482.846005] ? lockdep_hardirqs_on+0x40b/0x5d0 [ 482.850922] do_syscall_64+0xf9/0x620 [ 482.854731] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 482.860301] RIP: 0033:0x449c09 [ 482.863498] 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 [ 482.883520] RSP: 002b:00007f76ee30ece8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 482.892181] RAX: ffffffffffffffda RBX: 00000000006dfc58 RCX: 0000000000449c09 [ 482.899591] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 482.906872] RBP: 00000000006dfc50 R08: 00007f76ee30f700 R09: 0000000000000000 [ 482.914457] R10: 00007f76ee30f700 R11: 0000000000000246 R12: 00000000006dfc5c [ 482.922407] R13: 00007fffd97a3f1f R14: 00007f76ee30f9c0 R15: 20c49ba5e353f7cf [ 482.931994] Kernel Offset: disabled [ 482.936405] Rebooting in 86400 seconds..