------------[ cut here ]------------
kernfs: can not remove 'nr_tags', no directory
WARNING: CPU: 0 PID: 5047 at fs/kernfs/dir.c:1615 kernfs_remove_by_name_ns+0xce/0xf0 fs/kernfs/dir.c:1615
Modules linked in:
CPU: 0 PID: 5047 Comm: syz-executor.0 Not tainted 6.1.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:kernfs_remove_by_name_ns+0xce/0xf0 fs/kernfs/dir.c:1615
Code: 78 81 76 ff 31 c0 5b 5d 41 5c 41 5d 41 5e c3 4c 89 e7 e8 65 81 76 ff b8 fe ff ff ff eb e8 48 c7 c7 20 ce 3d 89 e8 8b 16 9d 06 <0f> 0b b8 fe ff ff ff eb d3 e8 94 1b d2 ff eb 81 e8 8d 1b d2 ff e9
RSP: 0018:ffffc900045b7a68 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffffff8ba49b28 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: fffff520008b6f3f
RBP: ffffffff8ba49c20 R08: 0000000000000000 R09: ffffc900045b7797
R10: fffff520008b6ef2 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff898348a0 R15: ffff88801d943800
FS:  00007ff4319df700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4319be718 CR3: 0000000074fa5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kernfs_remove_by_name include/linux/kernfs.h:618 [inline]
 remove_files+0x87/0x1a0 fs/sysfs/group.c:28
 sysfs_remove_group+0x72/0x140 fs/sysfs/group.c:288
 sysfs_remove_groups fs/sysfs/group.c:312 [inline]
 sysfs_remove_groups+0x4a/0x90 fs/sysfs/group.c:304
 __kobject_del+0x7d/0x1c0 lib/kobject.c:579
 kobject_del lib/kobject.c:611 [inline]
 kobject_del+0x32/0x50 lib/kobject.c:603
 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline]
 blk_mq_unregister_hctx block/blk-mq-sysfs.c:170 [inline]
 blk_mq_sysfs_unregister_hctxs+0x1f6/0x270 block/blk-mq-sysfs.c:302
 __blk_mq_update_nr_hw_queues block/blk-mq.c:4637 [inline]
 blk_mq_update_nr_hw_queues+0x421/0xcf0 block/blk-mq.c:4683
 nbd_start_device+0x10a/0xac0 drivers/block/nbd.c:1355
 nbd_start_device_ioctl drivers/block/nbd.c:1405 [inline]
 __nbd_ioctl drivers/block/nbd.c:1481 [inline]
 nbd_ioctl+0x2e2/0x9d0 drivers/block/nbd.c:1521
 blkdev_ioctl+0x2ff/0x6c0 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff43088a5a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff4319df168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff4309abf80 RCX: 00007ff43088a5a9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007
RBP: 00007ff4319df1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffc36f53eff R14: 00007ff4319df300 R15: 0000000000022000
 </TASK>