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BUG: KCSAN: data-race in __kernfs_remove / cleanup_glue_dir

write to 0xffff8881334a98c0 of 8 bytes by task 5925 on cpu 1:
 kernfs_unlink_sibling fs/kernfs/dir.c:396 [inline]
 __kernfs_remove+0x594/0x6d0 fs/kernfs/dir.c:1375
 kernfs_remove+0x40/0x50 fs/kernfs/dir.c:1403
 sysfs_remove_dir+0x7a/0x90 fs/sysfs/dir.c:101
 __kobject_del lib/kobject.c:620 [inline]
 kobject_del+0xb7/0x110 lib/kobject.c:643
 device_del+0x845/0x8c0 drivers/base/core.c:3603
 device_unregister+0x11/0x30 drivers/base/core.c:3624
 wakeup_source_sysfs_remove+0x21/0x30 drivers/base/power/wakeup_stats.c:208
 wakeup_source_unregister+0xea/0x110 drivers/base/power/wakeup.c:249
 ep_remove+0x2b2/0x360 fs/eventpoll.c:723
 ep_free+0x18b/0x210 fs/eventpoll.c:778
 ep_eventpoll_release+0x2e/0x40 fs/eventpoll.c:795
 __fput+0x295/0x520 fs/file_table.c:317
 ____fput+0x11/0x20 fs/file_table.c:350
 task_work_run+0x8e/0x110 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x160/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881334a98c0 of 8 bytes by task 5922 on cpu 0:
 kobject_has_children drivers/base/core.c:3040 [inline]
 cleanup_glue_dir+0xcb/0x140 drivers/base/core.c:3106
 device_del+0x850/0x8c0 drivers/base/core.c:3604
 device_unregister+0x11/0x30 drivers/base/core.c:3624
 wakeup_source_sysfs_remove+0x21/0x30 drivers/base/power/wakeup_stats.c:208
 wakeup_source_unregister+0xea/0x110 drivers/base/power/wakeup.c:249
 ep_free+0x1f8/0x210 fs/eventpoll.c:786
 ep_eventpoll_release+0x2e/0x40 fs/eventpoll.c:795
 __fput+0x295/0x520 fs/file_table.c:317
 ____fput+0x11/0x20 fs/file_table.c:350
 task_work_run+0x8e/0x110 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x160/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000002 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5922 Comm: syz-executor.3 Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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