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BUG: KCSAN: data-race in __kernfs_remove / kernfs_iop_permission

read-write to 0xffff8881026662c0 of 8 bytes by task 22383 on cpu 1:
 kernfs_unlink_sibling fs/kernfs/dir.c:412 [inline]
 __kernfs_remove+0x2ee/0x440 fs/kernfs/dir.c:1467
 kernfs_remove+0x4e/0x70 fs/kernfs/dir.c:1503
 sysfs_remove_dir+0x7e/0xa0 fs/sysfs/dir.c:101
 __kobject_del+0x9d/0x1a0 lib/kobject.c:597
 kobject_del+0x2e/0x50 lib/kobject.c:620
 device_del+0x724/0x790 drivers/base/core.c:3821
 drop_partition block/partitions/core.c:273 [inline]
 delete_partition+0xa7/0xc0 block/partitions/core.c:285
 bdev_disk_changed+0x156/0xbd0 block/partitions/core.c:667
 __loop_clr_fd+0x2bc/0x3b0 drivers/block/loop.c:1189
 loop_clr_fd drivers/block/loop.c:1257 [inline]
 lo_ioctl+0xe93/0x12e0 drivers/block/loop.c:1563
 blkdev_ioctl+0x375/0x460 block/ioctl.c:628
 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:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff8881026662c0 of 8 bytes by task 2775 on cpu 0:
 kernfs_refresh_inode fs/kernfs/inode.c:180 [inline]
 kernfs_iop_permission+0x18a/0x1e0 fs/kernfs/inode.c:288
 do_inode_permission fs/namei.c:461 [inline]
 inode_permission+0x184/0x300 fs/namei.c:528
 may_lookup fs/namei.c:1723 [inline]
 link_path_walk+0x19e/0x7e0 fs/namei.c:2270
 path_lookupat+0x72/0x2a0 fs/namei.c:2481
 filename_lookup+0x126/0x300 fs/namei.c:2511
 user_path_at_empty+0x42/0x110 fs/namei.c:2910
 do_readlinkat+0x92/0x210 fs/stat.c:516
 __do_sys_readlink fs/stat.c:549 [inline]
 __se_sys_readlink fs/stat.c:546 [inline]
 __x64_sys_readlink+0x47/0x50 fs/stat.c:546
 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: 0x00000000000000c0 -> 0x00000000000000bf

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2775 Comm: udevd Tainted: G        W          6.5.0-syzkaller-04808-g6c1b980a7e79 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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