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BUG: KCSAN: data-race in kernfs_iop_permission / kernfs_link_sibling

read-write to 0xffff8881002ef2c0 of 8 bytes by task 20316 on cpu 0:
 kernfs_link_sibling+0x1e7/0x230 fs/kernfs/dir.c:387
 kernfs_add_one+0x260/0x390 fs/kernfs/dir.c:770
 kernfs_create_dir_ns+0x100/0x150 fs/kernfs/dir.c:1046
 sysfs_create_dir_ns+0xd7/0x1d0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:65 [inline]
 kobject_add_internal+0x47b/0x780 lib/kobject.c:233
 kobject_add_varg lib/kobject.c:367 [inline]
 kobject_add+0xdc/0x150 lib/kobject.c:419
 class_dir_create_and_add drivers/base/core.c:3169 [inline]
 get_device_parent+0x276/0x2f0 drivers/base/core.c:3220
 device_add+0x20c/0xab0 drivers/base/core.c:3549
 wakeup_source_device_create drivers/base/power/wakeup_stats.c:161 [inline]
 wakeup_source_sysfs_add+0x136/0x1a0 drivers/base/power/wakeup_stats.c:181
 wakeup_source_register+0x106/0x250 drivers/base/power/wakeup.c:223
 ep_create_wakeup_source fs/eventpoll.c:1417 [inline]
 ep_insert+0x81a/0xc90 fs/eventpoll.c:1551
 do_epoll_ctl+0x614/0x930 fs/eventpoll.c:2227
 __do_sys_epoll_ctl fs/eventpoll.c:2284 [inline]
 __se_sys_epoll_ctl fs/eventpoll.c:2275 [inline]
 __x64_sys_epoll_ctl+0xc6/0xf0 fs/eventpoll.c:2275
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff8881002ef2c0 of 8 bytes by task 6053 on cpu 1:
 kernfs_refresh_inode fs/kernfs/inode.c:181 [inline]
 kernfs_iop_permission+0x165/0x1b0 fs/kernfs/inode.c:289
 do_inode_permission fs/namei.c:461 [inline]
 inode_permission+0x184/0x300 fs/namei.c:528
 may_lookup fs/namei.c:1720 [inline]
 link_path_walk+0x19e/0x7e0 fs/namei.c:2267
 path_openat+0x1a1/0x1d10 fs/namei.c:3789
 do_filp_open+0xf6/0x200 fs/namei.c:3820
 do_sys_openat2+0xab/0x110 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_openat fs/open.c:1438 [inline]
 __se_sys_openat fs/open.c:1433 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1433
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000000000000019 -> 0x000000000000001a

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 6053 Comm: udevd Not tainted 6.4.0-syzkaller-12365-g8689f4f2ea56 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
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