F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock
------------[ cut here ]------------
F2FS-fs (loop1): Invalid segment count (0)
user requested TSC rate below hardware speed
F2FS-fs (loop1): Can't find valid F2FS filesystem in 2th superblock
WARNING: CPU: 0 PID: 6474 at arch/x86/kvm/x86.c:1414 set_tsc_khz arch/x86/kvm/x86.c:1414 [inline]
WARNING: CPU: 0 PID: 6474 at arch/x86/kvm/x86.c:1414 kvm_set_tsc_khz+0x4f1/0x540 arch/x86/kvm/x86.c:1463
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 6474 Comm: syz-executor6 Not tainted 4.18.0-rc8-next-20180807+ #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:996
RIP: 0010:set_tsc_khz arch/x86/kvm/x86.c:1414 [inline]
RIP: 0010:kvm_set_tsc_khz+0x4f1/0x540 arch/x86/kvm/x86.c:1463
Code: c7 c7 40 1a 02 87 c6 05 77 b6 79 07 01 e8 67 6a 3b 00 0f 0b e9 ed fd ff ff e8 6b d1 70 00 48 c7 c7 e0 19 02 87 e8 4f 6a 3b 00 <0f> 0b bb ff ff ff ff e9 d0 fd ff ff 89 45 d0 e8 4b cf af 00 8b 45
RSP: 0018:ffff88019348f398 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000231867 RCX: ffffc90006829000
RDX: 000000000003712b RSI: ffffffff8163ec91 RDI: 0000000000000001
RBP: ffff88019348f3d8 R08: ffff8801b154a640 R09: ffffed003b604fd0
R10: ffffed003b604fd0 R11: ffff8801db027e87 R12: ffff880195b78040
R13: 00000000002314d6 R14: 0000000000231867 R15: 0000000000000000
 kvm_arch_vcpu_init+0x269/0x830 arch/x86/kvm/x86.c:8702
 kvm_vcpu_init+0x2fb/0x420 arch/x86/kvm/../../../virt/kvm/kvm_main.c:317
 vmx_create_vcpu+0x14c/0x28b0 arch/x86/kvm/vmx.c:10691
IPVS: ftp: loaded support on port[0] = 21
 kvm_arch_vcpu_create+0xe5/0x220 arch/x86/kvm/x86.c:8401
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2476 [inline]
 kvm_vm_ioctl+0x488/0x1d80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2977
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456cb9
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb386de9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb386dea6d4 RCX: 0000000000456cb9
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000014
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004ce2c0 R14: 00000000004c4c57 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..