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BUG: KCSAN: data-race in init_file / prepare_creds

write to 0xffff8881047d9ee8 of 4 bytes by task 4530 on cpu 0:
 get_cred_many include/linux/cred.h:222 [inline]
 get_cred include/linux/cred.h:238 [inline]
 init_file+0x2d/0x1b0 fs/file_table.c:183
 alloc_empty_file+0x85/0x1e0 fs/file_table.c:266
 path_openat+0x65/0x2050 fs/namei.c:4844
 do_file_open+0x16c/0x290 fs/namei.c:4887
 do_sys_openat2+0x94/0x130 fs/open.c:1364
 do_sys_open fs/open.c:1370 [inline]
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1381
 x64_sys_call+0x1e39/0x3020 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881047d9e40 of 184 bytes by task 4535 on cpu 1:
 prepare_creds+0x6d/0x540 kernel/cred.c:192
 copy_creds+0x8f/0x340 kernel/cred.c:286
 copy_process+0x849/0x23a0 kernel/fork.c:2123
 kernel_clone+0x1a5/0x5e0 kernel/fork.c:2723
 __do_sys_clone kernel/fork.c:2864 [inline]
 __se_sys_clone kernel/fork.c:2848 [inline]
 __x64_sys_clone+0x143/0x180 kernel/fork.c:2848
 x64_sys_call+0x1222/0x3020 arch/x86/include/generated/asm/syscalls_64.h:57
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 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: 4535 Comm: syz.4.229 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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cgroup: fork rejected by pids controller in /syz4