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BUG: KCSAN: data-race in fsnotify_parent / vfs_rename

write to 0xffff888120d79000 of 4 bytes by task 14296 on cpu 1:
 dont_mount include/linux/dcache.h:352 [inline]
 vfs_rename+0x985/0x1130 fs/namei.c:4297
 do_renameat2+0x9e8/0xa50 fs/namei.c:4437
 __do_sys_rename fs/namei.c:4483 [inline]
 __se_sys_rename fs/namei.c:4481 [inline]
 __x64_sys_rename+0x44/0x60 fs/namei.c:4481
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888120d79000 of 4 bytes by task 3951 on cpu 0:
 fsnotify_parent+0x4d/0x1b0 fs/notify/fsnotify.c:153
 fsnotify_file include/linux/fsnotify.h:74 [inline]
 fsnotify_perm include/linux/fsnotify.h:103 [inline]
 fsnotify_perm include/linux/fsnotify.h:82 [inline]
 security_file_permission+0x1a1/0x300 security/security.c:1430
 rw_verify_area+0xd8/0x230 fs/read_write.c:400
 vfs_read+0xec/0x2b0 fs/read_write.c:458
 ksys_read+0xc5/0x1a0 fs/read_write.c:588
 __do_sys_read fs/read_write.c:598 [inline]
 __se_sys_read fs/read_write.c:596 [inline]
 __x64_sys_read+0x49/0x60 fs/read_write.c:596
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3951 Comm: systemd-udevd Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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