audit: type=1400 audit(1519088363.737:28): avc:  denied  { setopt } for  pid=5669 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
pte_list_remove: 00000000287af4b6 0->BUG
------------[ cut here ]------------
kernel BUG at arch/x86/kvm/mmu.c:1209!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 5679 Comm: syz-executor7 Not tainted 4.16.0-rc2+ #320
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pte_list_remove+0x3ae/0x3c0 arch/x86/kvm/mmu.c:1208
RSP: 0018:ffff8801b5a5e988 EFLAGS: 00010282
RAX: 0000000000000028 RBX: ffff8801d7805880 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 1ffff10036b4bce6 RDI: ffffed0036b4bd25
RBP: ffff8801b5a5e9c8 R08: 1ffff10036b4bc7d R09: 0000000000000000
R10: ffff8801b5a5ed70 R11: 0000000000000000 R12: ffff8801b7061078
R13: 0000000000000000 R14: ffff8801b4621e80 R15: ffff8801b4621ea8
FS:  0000000000000000(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 0000000006a22005 CR4: 00000000001626e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rmap_remove arch/x86/kvm/mmu.c:1285 [inline]
 drop_spte+0x15a/0x250 arch/x86/kvm/mmu.c:1367
 mmu_page_zap_pte+0x224/0x340 arch/x86/kvm/mmu.c:2499
 kvm_mmu_page_unlink_children arch/x86/kvm/mmu.c:2521 [inline]
 kvm_mmu_prepare_zap_page+0x1c5/0x1310 arch/x86/kvm/mmu.c:2565
 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5348 [inline]
 kvm_mmu_invalidate_zap_all_pages+0x4a0/0x680 arch/x86/kvm/mmu.c:5389
 kvm_arch_flush_shadow_all+0x15/0x20 arch/x86/kvm/x86.c:8707
 kvm_mmu_notifier_release+0x59/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:468
 __mmu_notifier_release+0x1da/0x6a0 mm/mmu_notifier.c:75
 mmu_notifier_release include/linux/mmu_notifier.h:244 [inline]
 exit_mmap+0x3ff/0x500 mm/mmap.c:2998
 __mmput kernel/fork.c:971 [inline]
 mmput+0x223/0x6c0 kernel/fork.c:992
 exit_mm kernel/exit.c:544 [inline]
 do_exit+0x90a/0x1ad0 kernel/exit.c:852
 do_group_exit+0x149/0x400 kernel/exit.c:968
 get_signal+0x73a/0x16d0 kernel/signal.c:2469
 do_signal+0x90/0x1e90 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x258/0x2f0 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
 do_syscall_64+0x6e5/0x940 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x453da9
RSP: 002b:00007fa399ed9c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 00007fa399eda6d4 RCX: 0000000000453da9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000015
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000023b R14: 00000000006f3628 R15: 0000000000000000
Code: d9 e4 61 00 48 8b 75 d0 48 c7 c7 00 6a e2 85 e8 f1 88 4b 00 0f 0b e8 c2 e4 61 00 48 8b 75 d0 48 c7 c7 c0 69 e2 85 e8 da 88 4b 00 <0f> 0b 4c 89 ef e8 08 3b 9a 00 e9 01 fe ff ff 0f 1f 00 55 48 89 
RIP: pte_list_remove+0x3ae/0x3c0 arch/x86/kvm/mmu.c:1208 RSP: ffff8801b5a5e988
---[ end trace 4ca07bc45a9ee1f7 ]---