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BUG: KCSAN: data-race in __d_instantiate / dput

read-write to 0xffff88813cd0a3c0 of 4 bytes by task 10535 on cpu 0:
 __d_instantiate+0x2cd/0x3b0
 d_instantiate+0x59/0x80
 shmem_symlink+0x321/0x370
 vfs_symlink+0x18d/0x280
 do_symlinkat+0xe0/0x310
 __x64_sys_symlink+0x56/0x60
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813cd0a3c0 of 4 bytes by task 2736 on cpu 1:
 dput+0x35/0x1f0
 step_into+0x21a/0x800
 walk_component+0x164/0x230
 path_lookupat+0x10a/0x2a0
 filename_lookup+0x126/0x300
 user_path_at_empty+0x42/0x110
 do_readlinkat+0x92/0x210
 __x64_sys_readlink+0x47/0x50
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000008 -> 0x00600008

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2736 Comm: udevd Tainted: G        W          6.2.0-rc7-syzkaller-00002-gd2d11f342b17-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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