------------[ cut here ]------------ kernel BUG at arch/x86/kvm/mmu.c:1194! invalid opcode: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 2 PID: 3172 Comm: syz-executor0 Not tainted 4.13.0-rc4-next-20170811 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff88003b302940 task.stack: ffff88003ad28000 RIP: 0010:pte_list_remove+0x3ae/0x3c0 arch/x86/kvm/mmu.c:1193 RSP: 0018:ffff88003ad2e8c8 EFLAGS: 00010282 RAX: 0000000000000028 RBX: ffff88003d454a08 RCX: 0000000000000000 RDX: 0000000000000028 RSI: 1ffff100075a5cd9 RDI: ffffed00075a5d0d RBP: ffff88003ad2e908 R08: 0000000000000001 R09: 0000000000000000 R10: ffff88003ad2ecb0 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffff88006a3ab040 R15: ffff88006a3ab068 FS: 0000000000000000(0000) GS:ffff88006e000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020aff000 CR3: 000000006b0b1000 CR4: 00000000000026e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000081c3cfc0 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: rmap_remove arch/x86/kvm/mmu.c:1270 [inline] drop_spte+0x16c/0x270 arch/x86/kvm/mmu.c:1352 mmu_page_zap_pte+0x224/0x350 arch/x86/kvm/mmu.c:2484 kvm_mmu_page_unlink_children arch/x86/kvm/mmu.c:2506 [inline] kvm_mmu_prepare_zap_page+0x1c5/0x1310 arch/x86/kvm/mmu.c:2550 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5227 [inline] kvm_mmu_invalidate_zap_all_pages+0x4a0/0x680 arch/x86/kvm/mmu.c:5268 kvm_arch_flush_shadow_all+0x15/0x20 arch/x86/kvm/x86.c:8391 kvm_mmu_notifier_release+0x59/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:508 __mmu_notifier_release+0x1d5/0x690 mm/mmu_notifier.c:75 mmu_notifier_release include/linux/mmu_notifier.h:235 [inline] exit_mmap+0x479/0x560 mm/mmap.c:2982 __mmput kernel/fork.c:905 [inline] mmput+0x223/0x6e0 kernel/fork.c:927 exit_mm kernel/exit.c:544 [inline] do_exit+0x999/0x1b20 kernel/exit.c:852 do_group_exit+0x149/0x400 kernel/exit.c:968 get_signal+0x7e8/0x17e0 kernel/signal.c:2330 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808 exit_to_usermode_loop+0x21c/0x2d0 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x42f/0x500 arch/x86/entry/common.c:266 entry_SYSCALL_64_fastpath+0xbc/0xbe RIP: 0033:0x446627 RSP: 002b:00007f4723cc6088 EFLAGS: 00000216 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 0000000000000013 RCX: 0000000000446627 RDX: 00007f4723cc66a0 RSI: 000000004020ae46 RDI: 0000000000000004 RBP: 000000002001a000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000014 R13: 0000000000005570 R14: 00000000006e7630 R15: 0000000000000005 Code: f9 48 5e 00 48 8b 75 d0 48 c7 c7 40 4d 62 84 e8 3e 74 49 00 0f 0b e8 e2 48 5e 00 48 8b 75 d0 48 c7 c7 00 4d 62 84 e8 27 74 49 00 <0f> 0b 4c 89 ef e8 88 cd 90 00 e9 01 fe ff ff 0f 1f 00 55 48 89 RIP: pte_list_remove+0x3ae/0x3c0 arch/x86/kvm/mmu.c:1193 RSP: ffff88003ad2e8c8 ---[ end trace 155eb34dca756930 ]---