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BUG: KCSAN: data-race in __d_instantiate / step_into

write to 0xffff8881082341b0 of 8 bytes by task 14927 on cpu 0:
 __d_set_inode_and_type fs/dcache.c:344 [inline]
 __d_instantiate+0x1f9/0x3c0 fs/dcache.c:1853
 d_instantiate_new+0x5c/0xf0 fs/dcache.c:1899
 ext4_add_nondir+0x16c/0x1a0 fs/ext4/namei.c:2797
 ext4_create+0x20f/0x2f0 fs/ext4/namei.c:2838
 lookup_open fs/namei.c:3505 [inline]
 open_last_lookups fs/namei.c:3574 [inline]
 path_openat+0xdde/0x1da0 fs/namei.c:3804
 do_filp_open+0xf7/0x200 fs/namei.c:3834
 do_sys_openat2+0xab/0x120 fs/open.c:1405
 do_sys_open fs/open.c:1420 [inline]
 __do_sys_open fs/open.c:1428 [inline]
 __se_sys_open fs/open.c:1424 [inline]
 __x64_sys_open+0xe6/0x110 fs/open.c:1424
 x64_sys_call+0x12d6/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:3
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881082341b0 of 8 bytes by task 14926 on cpu 1:
 step_into+0x123/0x810 fs/namei.c:1846
 walk_component+0x169/0x230 fs/namei.c:2010
 lookup_last fs/namei.c:2469 [inline]
 path_lookupat+0x10a/0x2b0 fs/namei.c:2493
 filename_lookup+0x127/0x300 fs/namei.c:2522
 vfs_statx+0xa2/0x320 fs/stat.c:244
 vfs_fstatat fs/stat.c:304 [inline]
 vfs_stat include/linux/fs.h:3258 [inline]
 __do_sys_newstat fs/stat.c:441 [inline]
 __se_sys_newstat+0x6f/0x280 fs/stat.c:437
 __x64_sys_newstat+0x31/0x40 fs/stat.c:437
 x64_sys_call+0x56d/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:5
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000000 -> 0xffff888108214ed8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14926 Comm: syz-executor.1 Not tainted 6.10.0-rc4-syzkaller-00283-g563a50672d8a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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