RDX: 00007fdbfe5d2ad0 RSI: 0000000020000200 RDI: 00007fdbfe5d2af0
RBP: 0000000020000200 R08: 00007fdbfe5d2b30 R09: 00007fdbfe5d2ad0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000000 R14: 00000000004db380 R15: 00000000ffffffff
kobject_add_internal failed for _ with -EEXIST, don't try to register things with the same name in the same directory.
BUG: unable to handle kernel paging request at ffff888090d52000
#PF error: [PROT] [WRITE] [RSVD]
kobject: 'loop5' (000000005e1043d7): kobject_uevent_env
PGD c201067 P4D c201067 PUD 21ffff067 PMD 8000000090c001e3 
Oops: 000b [#1] PREEMPT SMP KASAN
CPU: 1 PID: 23795 Comm: syz-executor1 Not tainted 4.20.0-next-20190103 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop5' (000000005e1043d7): fill_kobj_path: path = '/devices/virtual/block/loop5'
RIP: 0010:__write_once_size include/linux/compiler.h:224 [inline]
RIP: 0010:__update_clear_spte_fast arch/x86/kvm/mmu.c:547 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:848 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:2040 [inline]
RIP: 0010:mmu_page_zap_pte+0x2b8/0x3b0 arch/x86/kvm/mmu.c:2618
Code: 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 d1 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 eb 03 <49> c7 04 24 00 00 00 00 c6 04 03 f8 b8 01 00 00 00 e9 2d fe ff ff
RSP: 0018:ffff888057277518 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: 1ffff1100ae4eea9 RCX: ffffc900083cc000
RDX: 1ffff110121aa400 RSI: ffffffff81114184 RDI: 0000000000000007
RBP: ffff8880572775d0 R08: ffff8880a096e540 R09: ffffed1015ce5b90
gfs2: fsid=_: error -17 adding sysfs files
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: ffff888090d52000
R13: 1ffff1100ae4eea5 R14: 0000000000000000 R15: ffff8880572775a8
FS:  00007f48e6ed6700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888090d52000 CR3: 000000009e5de000 CR4: 00000000001426e0
Call Trace:
 kvm_mmu_page_unlink_children arch/x86/kvm/mmu.c:2635 [inline]
 kvm_mmu_prepare_zap_page+0x19d/0x1440 arch/x86/kvm/mmu.c:2679
 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5843 [inline]
 kvm_mmu_invalidate_zap_all_pages+0x53e/0x710 arch/x86/kvm/mmu.c:5884
 kvm_arch_flush_shadow_all+0x16/0x20 arch/x86/kvm/x86.c:9456
 kvm_mmu_notifier_release+0x5c/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:494
 mmu_notifier_unregister+0x1dd/0x5e0 mm/mmu_notifier.c:356
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:744 [inline]
 kvm_put_kvm+0x6aa/0xff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:769
 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2491
 __fput+0x3c5/0xb10 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f48e6ed5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000457ec9
RDX: 00000000200001c0 RSI: 000000004040aea0 RDI: 0000000000000009
RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f48e6ed66d4
R13: 00000000004c10c8 R14: 00000000004d2a40 R15: 00000000ffffffff
Modules linked in:
CR2: ffff888090d52000
---[ end trace da028fd6da0daeec ]---
RIP: 0010:__write_once_size include/linux/compiler.h:224 [inline]
RIP: 0010:__update_clear_spte_fast arch/x86/kvm/mmu.c:547 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:848 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:2040 [inline]
RIP: 0010:mmu_page_zap_pte+0x2b8/0x3b0 arch/x86/kvm/mmu.c:2618
Code: 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 d1 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 eb 03 <49> c7 04 24 00 00 00 00 c6 04 03 f8 b8 01 00 00 00 e9 2d fe ff ff
RSP: 0018:ffff888057277518 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: 1ffff1100ae4eea9 RCX: ffffc900083cc000
RDX: 1ffff110121aa400 RSI: ffffffff81114184 RDI: 0000000000000007
RBP: ffff8880572775d0 R08: ffff8880a096e540 R09: ffffed1015ce5b90
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: ffff888090d52000
R13: 1ffff1100ae4eea5 R14: 0000000000000000 R15: ffff8880572775a8
FS:  00007f48e6ed6700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888090d52000 CR3: 000000009e5de000 CR4: 00000000001426e0