Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.781753][ T7196] 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. [ 62.831110][ T7196] faulting far call emulation tainted memory [ 63.081982][ T7200] ------------[ cut here ]------------ [ 63.087599][ T7200] WARNING: CPU: 1 PID: 7200 at arch/x86/kvm/x86.c:8778 kvm_arch_vcpu_ioctl_run+0x1d3/0x16a0 [ 63.097673][ T7200] Kernel panic - not syncing: panic_on_warn set ... [ 63.106547][ T7200] CPU: 1 PID: 7200 Comm: syz-executor433 Not tainted 5.7.0-rc3-syzkaller #0 [ 63.115229][ T7200] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.125673][ T7200] Call Trace: [ 63.128980][ T7200] dump_stack+0x188/0x20d [ 63.133322][ T7200] ? kvm_arch_vcpu_ioctl_run+0x120/0x16a0 [ 63.139572][ T7200] panic+0x2e3/0x75c [ 63.143532][ T7200] ? add_taint.cold+0x16/0x16 [ 63.153546][ T7200] ? printk+0xba/0xed [ 63.157654][ T7200] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 63.163123][ T7200] ? __warn.cold+0x14/0x35 [ 63.167550][ T7200] ? __warn+0xd5/0x1c8 [ 63.171640][ T7200] ? kvm_arch_vcpu_ioctl_run+0x1d3/0x16a0 [ 63.177381][ T7200] __warn.cold+0x2f/0x35 [ 63.181653][ T7200] ? kvm_arch_vcpu_ioctl_run+0x1d3/0x16a0 [ 63.187387][ T7200] report_bug+0x27b/0x2f0 [ 63.191725][ T7200] do_error_trap+0x12b/0x220 [ 63.196437][ T7200] ? kvm_arch_vcpu_ioctl_run+0x1d3/0x16a0 [ 63.202158][ T7200] do_invalid_op+0x32/0x40 [ 63.206573][ T7200] ? kvm_arch_vcpu_ioctl_run+0x1d3/0x16a0 [ 63.212288][ T7200] invalid_op+0x23/0x30 [ 63.216445][ T7200] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x1d3/0x16a0 [ 63.222764][ T7200] Code: 03 80 3c 02 00 0f 85 c8 13 00 00 4c 8b a5 28 0d 00 00 31 ff 4c 89 e6 e8 8b 6e 64 00 4d 85 e4 0f 84 2a 0c 00 00 e8 ed 6c 64 00 <0f> 0b e8 e6 6c 64 00 48 8d 7b 01 48 b8 00 00 00 00 00 fc ff df 48 [ 63.242815][ T7200] RSP: 0018:ffffc9000162fce0 EFLAGS: 00010293 [ 63.248899][ T7200] RAX: ffff88809515c540 RBX: ffff888090e6c000 RCX: ffffffff810ece16 [ 63.257118][ T7200] RDX: 0000000000000000 RSI: ffffffff810ec1b3 RDI: 0000000000000005 [ 63.265379][ T7200] RBP: ffff8880956a8040 R08: ffff88809515c540 R09: ffffed1015ce7104 [ 63.273516][ T7200] R10: ffff8880ae73881b R11: ffffed1015ce7103 R12: 0000000000000001 [ 63.281498][ T7200] R13: 0000000000000000 R14: ffff88809cb68140 R15: ffff8880956a8130 [ 63.289844][ T7200] ? kvm_arch_vcpu_ioctl_run+0xe36/0x16a0 [ 63.295575][ T7200] ? kvm_arch_vcpu_ioctl_run+0x1d3/0x16a0 [ 63.301305][ T7200] kvm_vcpu_ioctl+0x493/0xe60 [ 63.306019][ T7200] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 63.312697][ T7200] ? ioctl_file_clone+0x180/0x180 [ 63.317723][ T7200] ? __fget_files+0x32f/0x500 [ 63.322398][ T7200] ? ksys_dup3+0x3c0/0x3c0 [ 63.326965][ T7200] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.333533][ T7200] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 63.339950][ T7200] ksys_ioctl+0x11a/0x180 [ 63.344289][ T7200] __x64_sys_ioctl+0x6f/0xb0 [ 63.348885][ T7200] ? lockdep_hardirqs_on+0x463/0x620 [ 63.354497][ T7200] do_syscall_64+0xf6/0x7d0 [ 63.359045][ T7200] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 63.364946][ T7200] RIP: 0033:0x449c09 [ 63.368836][ T7200] 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 [ 63.388756][ T7200] RSP: 002b:00007efe3aac7ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 63.397173][ T7200] RAX: ffffffffffffffda RBX: 00000000006dfc58 RCX: 0000000000449c09 [ 63.405138][ T7200] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 63.413110][ T7200] RBP: 00000000006dfc50 R08: 00007efe3aac8700 R09: 0000000000000000 [ 63.421262][ T7200] R10: 00007efe3aac8700 R11: 0000000000000246 R12: 00000000006dfc5c [ 63.429336][ T7200] R13: 00007fff47db1d5f R14: 00007efe3aac89c0 R15: 20c49ba5e353f7cf [ 63.438829][ T7200] Kernel Offset: disabled [ 63.443227][ T7200] Rebooting in 86400 seconds..