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BUG: KCSAN: data-race in __kernfs_remove / cleanup_glue_dir

read-write to 0xffff88811cb66b40 of 8 bytes by task 24113 on cpu 0:
 kernfs_unlink_sibling fs/kernfs/dir.c:415 [inline]
 __kernfs_remove+0x2ff/0x480 fs/kernfs/dir.c:1471
 kernfs_remove+0x4e/0x70 fs/kernfs/dir.c:1507
 sysfs_remove_dir+0x7e/0xa0 fs/sysfs/dir.c:101
 __kobject_del+0x8c/0x190 lib/kobject.c:601
 kobject_del+0x2e/0x50 lib/kobject.c:624
 device_del+0x72f/0x7a0 drivers/base/core.c:3834
 del_gendisk+0x533/0x670 block/genhd.c:695
 loop_remove drivers/block/loop.c:2115 [inline]
 loop_control_remove drivers/block/loop.c:2174 [inline]
 loop_control_ioctl+0x3aa/0x440 drivers/block/loop.c:2212
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88811cb66b40 of 8 bytes by task 24114 on cpu 1:
 kobject_has_children drivers/base/core.c:3283 [inline]
 cleanup_glue_dir+0xe5/0x160 drivers/base/core.c:3349
 device_del+0x73a/0x7a0 drivers/base/core.c:3835
 del_gendisk+0x533/0x670 block/genhd.c:695
 loop_remove drivers/block/loop.c:2115 [inline]
 loop_control_remove drivers/block/loop.c:2174 [inline]
 loop_control_ioctl+0x3aa/0x440 drivers/block/loop.c:2212
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000000000001 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 24114 Comm: syz-executor.0 Not tainted 6.7.0-rc5-syzkaller-00125-gc7402612e2e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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