[ 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. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.113' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 71.998399][ T6832] 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. executing program executing program executing program executing program executing program executing program executing program executing program [ 72.342112][ T6868] ------------[ cut here ]------------ [ 72.347925][ T6868] WARNING: CPU: 0 PID: 6868 at include/linux/entry-kvm.h:75 kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 72.359118][ T6868] Kernel panic - not syncing: panic_on_warn set ... [ 72.365737][ T6868] CPU: 0 PID: 6868 Comm: syz-executor442 Not tainted 5.8.0-rc7-next-20200729-syzkaller #0 [ 72.375605][ T6868] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.385643][ T6868] Call Trace: [ 72.388923][ T6868] dump_stack+0x18f/0x20d [ 72.393256][ T6868] panic+0x2e3/0x75c [ 72.397136][ T6868] ? __warn_printk+0xf3/0xf3 [ 72.401711][ T6868] ? printk+0xba/0xed [ 72.405751][ T6868] ? log_store.cold+0x16/0x16 [ 72.410413][ T6868] ? __warn.cold+0x5/0x4a [ 72.414745][ T6868] ? __warn+0xd6/0x1f2 [ 72.418796][ T6868] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 72.424504][ T6868] __warn.cold+0x20/0x4a [ 72.428735][ T6868] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 72.434458][ T6868] report_bug+0x1bd/0x210 [ 72.438777][ T6868] handle_bug+0x38/0x90 [ 72.442917][ T6868] exc_invalid_op+0x14/0x40 [ 72.447401][ T6868] asm_exc_invalid_op+0x12/0x20 [ 72.452238][ T6868] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 72.458548][ T6868] Code: 97 74 64 00 45 85 e4 74 23 e8 0d 78 64 00 65 44 8b 25 f1 44 f2 7e 31 ff 44 89 e6 e8 7b 74 64 00 45 85 e4 74 07 e8 f1 77 64 00 <0f> 0b e8 ea 77 64 00 48 8b 44 24 08 80 38 00 0f 85 1e 0f 00 00 48 [ 72.478134][ T6868] RSP: 0018:ffffc90005587d18 EFLAGS: 00010293 [ 72.484193][ T6868] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff810fc7d5 [ 72.492159][ T6868] RDX: ffff8880a6db6100 RSI: ffffffff810fc7df RDI: 0000000000000005 [ 72.500108][ T6868] RBP: ffff888091918240 R08: 0000000000000001 R09: ffff88809191827f [ 72.508061][ T6868] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 [ 72.516017][ T6868] R13: ffff888091918624 R14: ffff888091918330 R15: ffff8880919185d0 [ 72.523990][ T6868] ? kvm_arch_vcpu_ioctl_run+0x5a5/0x17f0 [ 72.529690][ T6868] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 72.535412][ T6868] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 72.541114][ T6868] kvm_vcpu_ioctl+0x467/0xdf0 [ 72.545778][ T6868] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 72.551566][ T6868] ? generic_block_fiemap+0x60/0x60 [ 72.556763][ T6868] ? __up_read+0x1a1/0x7b0 [ 72.561249][ T6868] ? _down_write_nest_lock+0x150/0x150 [ 72.566718][ T6868] ? lock_is_held_type+0xbb/0xf0 [ 72.571644][ T6868] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 72.577431][ T6868] __x64_sys_ioctl+0x193/0x200 [ 72.582178][ T6868] do_syscall_64+0x2d/0x70 [ 72.586583][ T6868] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.592457][ T6868] RIP: 0033:0x4412e9 [ 72.596331][ T6868] Code: e8 fc ab 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 1b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 72.615919][ T6868] RSP: 002b:00007ffce66418b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 72.624442][ T6868] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412e9 [ 72.632394][ T6868] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 72.640379][ T6868] RBP: 0000000000011a6a R08: 00000000004002c8 R09: 00000000004002c8 [ 72.648343][ T6868] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402090 [ 72.656297][ T6868] R13: 0000000000402120 R14: 0000000000000000 R15: 0000000000000000 [ 72.665805][ T6868] Kernel Offset: disabled [ 72.670181][ T6868] Rebooting in 86400 seconds..