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BUG: KCSAN: data-race in shrink_dentry_list / step_into

read-write to 0xffff88810209dc00 of 4 bytes by task 1849 on cpu 0:
 d_shrink_del fs/dcache.c:448 [inline]
 shrink_dentry_list+0x169/0x380 fs/dcache.c:1197
 shrink_dcache_sb+0x165/0x290 fs/dcache.c:1321
 reconfigure_super+0x473/0x580 fs/super.c:1108
 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 0xffff88810209dc00 of 4 bytes by task 1859 on cpu 1:
 __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:1844
 walk_component fs/namei.c:2007 [inline]
 link_path_walk+0x4d8/0x7e0 fs/namei.c:2328
 path_lookupat+0x72/0x2a0 fs/namei.c:2481
 filename_lookup+0x126/0x300 fs/namei.c:2511
 vfs_statx+0xa2/0x430 fs/stat.c:277
 vfs_fstatat fs/stat.c:315 [inline]
 __do_sys_newfstatat fs/stat.c:485 [inline]
 __se_sys_newfstatat+0x8a/0x2a0 fs/stat.c:479
 __x64_sys_newfstatat+0x55/0x60 fs/stat.c:479
 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: 0x00680440 -> 0x00008040

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1859 Comm: modprobe Not tainted 6.5.0-syzkaller-01207-g1c59d383390f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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