list_del corruption. prev->next should be ffff888090b75bf0, but was ffff8882199e39b0
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:51!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9194 Comm: syz-executor.1 Not tainted 5.5.0-rc1-next-20191211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold+0xf/0x4f lib/list_debug.c:51
Code: e8 c9 00 cb fd 0f 0b 48 89 f1 48 c7 c7 c0 10 70 88 4c 89 e6 e8 b5 00 cb fd 0f 0b 4c 89 f6 48 c7 c7 60 12 70 88 e8 a4 00 cb fd <0f> 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 11 70 88 e8 90 00 cb fd 0f 0b
RSP: 0018:ffffc90001757c00 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffff8880aa0ca040 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815e8576 RDI: fffff520002eaf72
RBP: ffffc90001757c18 R08: 0000000000000054 R09: fffffbfff165a7a6
R10: fffffbfff165a7a5 R11: ffffffff8b2d3d2f R12: ffff8880aa0ca140
R13: ffff8882199e39b0 R14: ffff888090b75bf0 R15: ffff888090b75bf0
FS:  000000000223f940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c23000 CR3: 000000009babe000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:131 [inline]
 dentry_unlist fs/dcache.c:522 [inline]
 __dentry_kill+0x1fd/0x600 fs/dcache.c:575
 dentry_kill fs/dcache.c:698 [inline]
 dput+0x62f/0xe10 fs/dcache.c:859
 simple_recursive_removal+0x5bc/0x6d0 fs/libfs.c:302
 debugfs_remove fs/debugfs/inode.c:713 [inline]
 debugfs_remove+0x5e/0x80 fs/debugfs/inode.c:707
 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:620 [inline]
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:795 [inline]
 kvm_put_kvm+0x136/0xcc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:837
 kvm_vm_release+0x44/0x60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:860
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x676/0x790 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4144a1
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffcc914d4d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004144a1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00000000fc2b66a5 R09: 00000000fc2b66a9
R10: 00007ffcc914d5b0 R11: 0000000000000293 R12: 000000000075bfc8
R13: 0000000000034249 R14: 00000000007604c0 R15: 000000000075bfd4
Modules linked in:
---[ end trace e46e7673aa3bb5be ]---
RIP: 0010:__list_del_entry_valid.cold+0xf/0x4f lib/list_debug.c:51
Code: e8 c9 00 cb fd 0f 0b 48 89 f1 48 c7 c7 c0 10 70 88 4c 89 e6 e8 b5 00 cb fd 0f 0b 4c 89 f6 48 c7 c7 60 12 70 88 e8 a4 00 cb fd <0f> 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 11 70 88 e8 90 00 cb fd 0f 0b
RSP: 0018:ffffc90001757c00 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffff8880aa0ca040 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815e8576 RDI: fffff520002eaf72
RBP: ffffc90001757c18 R08: 0000000000000054 R09: fffffbfff165a7a6
R10: fffffbfff165a7a5 R11: ffffffff8b2d3d2f R12: ffff8880aa0ca140
R13: ffff8882199e39b0 R14: ffff888090b75bf0 R15: ffff888090b75bf0
FS:  000000000223f940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c23000 CR3: 000000009babe000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400