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BUG: KCSAN: data-race in init_file / prepare_creds

write to 0xffff8881367dbbe8 of 4 bytes by task 7665 on cpu 0:
 get_cred_many include/linux/cred.h:219 [inline]
 get_cred include/linux/cred.h:235 [inline]
 init_file+0x2e/0x1c0 fs/file_table.c:158
 alloc_empty_file+0x8b/0x200 fs/file_table.c:241
 path_openat+0x63/0x23b0 fs/namei.c:4773
 do_filp_open+0x109/0x230 fs/namei.c:4814
 do_sys_openat2+0xa6/0x150 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1447
 x64_sys_call+0x2b07/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881367dbb40 of 184 bytes by task 7664 on cpu 1:
 prepare_creds+0x6e/0x550 kernel/cred.c:192
 copy_creds+0x8f/0x340 kernel/cred.c:286
 copy_process+0x638/0x1ef0 kernel/fork.c:2086
 kernel_clone+0x16c/0x5c0 kernel/fork.c:2651
 __do_sys_clone kernel/fork.c:2792 [inline]
 __se_sys_clone kernel/fork.c:2776 [inline]
 __x64_sys_clone+0xe6/0x120 kernel/fork.c:2776
 x64_sys_call+0x12d0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:57
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 7664 Comm: syz.6.1042 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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