==================================================================
BUG: KCSAN: data-race in shrink_dentry_list / step_into

read-write to 0xffff888109be4780 of 4 bytes by task 27178 on cpu 1:
 d_shrink_del fs/dcache.c:448 [inline]
 shrink_dentry_list+0x1c7/0x380 fs/dcache.c:1188
 shrink_dcache_sb+0x165/0x290 fs/dcache.c:1321
 reconfigure_super+0x3ed/0x580 fs/super.c:939
 do_remount fs/namespace.c:2882 [inline]
 path_mount+0x969/0xb30 fs/namespace.c:3654
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3861
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3861
 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 0xffff888109be4780 of 4 bytes by task 3082 on cpu 0:
 __d_entry_type include/linux/dcache.h:385 [inline]
 d_is_symlink include/linux/dcache.h:415 [inline]
 step_into+0x12f/0x800 fs/namei.c:1841
 walk_component fs/namei.c:2004 [inline]
 link_path_walk+0x4d8/0x7e0 fs/namei.c:2325
 path_parentat fs/namei.c:2526 [inline]
 __filename_parentat+0x13b/0x3c0 fs/namei.c:2550
 filename_parentat fs/namei.c:2568 [inline]
 do_rmdir+0x85/0x310 fs/namei.c:4227
 __do_sys_unlinkat fs/namei.c:4437 [inline]
 __se_sys_unlinkat fs/namei.c:4431 [inline]
 __x64_sys_unlinkat+0xa4/0xb0 fs/namei.c:4431
 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: 0x00280400 -> 0x00200000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3082 Comm: syz-executor.5 Not tainted 6.5.0-rc7-syzkaller-00022-ga5e505a99ca7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
==================================================================