------------[ cut here ]------------
WARNING: CPU: 1 PID: 5676 at arch/x86/kvm/mmu.c:719 mmu_spte_clear_track_bits+0x35a/0x3f0 arch/x86/kvm/mmu.c:719
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 5676 Comm: syz-executor1 Not tainted 4.13.0-rc6-next-20170825+ #9
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x41c kernel/panic.c:181
 __warn+0x1c4/0x1e0 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
 do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:929
RIP: 0010:mmu_spte_clear_track_bits+0x35a/0x3f0 arch/x86/kvm/mmu.c:719
RSP: 0018:ffff88003a2b72f0 EFLAGS: 00010212
RAX: 0000000000010000 RBX: 1ffff10007456e60 RCX: ffffc90001065000
RDX: 000000000000067d RSI: ffffffff810f146a RDI: ffffea0000c35c9c
RBP: ffff88003a2b7408 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88003a2b6fa8 R11: 1ffff100078da2eb R12: 4000000030d72075
R13: 0000000000000000 R14: ffff88003a2b73e0 R15: 0000000000030d72
 drop_spte+0x24/0x250 arch/x86/kvm/mmu.c:1351
 kvm_zap_rmapp+0x7e/0xd0 arch/x86/kvm/mmu.c:1606
 kvm_unmap_rmapp+0x1d/0x30 arch/x86/kvm/mmu.c:1617
 kvm_handle_hva_range+0x3ed/0x6e0 arch/x86/kvm/mmu.c:1771
 kvm_unmap_hva_range+0x2e/0x40 arch/x86/kvm/mmu.c:1797
 kvm_mmu_notifier_invalidate_range_start+0x9a/0x130 arch/x86/kvm/../../../virt/kvm/kvm_main.c:398
 __mmu_notifier_invalidate_range_start+0x1cd/0x2d0 mm/mmu_notifier.c:200
 mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:282 [inline]
 unmap_vmas+0x14b/0x1b0 mm/memory.c:1581
 unmap_region+0x2b2/0x4f0 mm/mmap.c:2496
 do_munmap+0x726/0xdf0 mm/mmap.c:2709
 mmap_region+0x59e/0x15a0 mm/mmap.c:1631
 do_mmap+0x6a1/0xd50 mm/mmap.c:1468
 do_mmap_pgoff include/linux/mm.h:2149 [inline]
 vm_mmap_pgoff+0x1de/0x280 mm/util.c:333
 SYSC_mmap_pgoff mm/mmap.c:1518 [inline]
 SyS_mmap_pgoff+0x23b/0x5f0 mm/mmap.c:1476
 SYSC_mmap arch/x86/kernel/sys_x86_64.c:99 [inline]
 SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:90
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x446749
RSP: 002b:00007f118e6e1c08 EFLAGS: 00000282 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000446749
RDX: 0000000000000003 RSI: 0000000000021000 RDI: 0000000020000000
RBP: 0000000000000086 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000032 R11: 0000000000000282 R12: 00000000ffffffff
R13: 00000000000022a0 R14: 00000000006e4360 R15: 00000000c018ae85
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..