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BUG: KCSAN: data-race in init_file / prepare_creds

write to 0xffff88811108d3a8 of 4 bytes by task 12667 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+0x62/0x23c0 fs/namei.c:4782
 do_filp_open+0x15d/0x280 fs/namei.c:4823
 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+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811108d300 of 184 bytes by task 12668 on cpu 1:
 prepare_creds+0x6d/0x550 kernel/cred.c:192
 __sys_setresuid+0x463/0x6d0 kernel/sys.c:749
 __do_sys_setresuid kernel/sys.c:785 [inline]
 __se_sys_setresuid kernel/sys.c:783 [inline]
 __x64_sys_setresuid+0x3f/0x50 kernel/sys.c:783
 x64_sys_call+0x1e85/0x3000 arch/x86/include/generated/asm/syscalls_64.h:118
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc0/0x2a0 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: 12668 Comm: syz.1.1673 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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