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BUG: KCSAN: data-race in copy_creds / prepare_creds

write to 0xffff888102727ee8 of 4 bytes by task 21367 on cpu 0:
 get_cred_many include/linux/cred.h:219 [inline]
 copy_creds+0x78/0x340 kernel/cred.c:278
 copy_process+0x638/0x1ef0 kernel/fork.c:2086
 kernel_clone+0x16c/0x5c0 kernel/fork.c:2651
 __do_sys_clone3 kernel/fork.c:2953 [inline]
 __se_sys_clone3+0x1c2/0x200 kernel/fork.c:2932
 __x64_sys_clone3+0x31/0x40 kernel/fork.c:2932
 x64_sys_call+0x2c0f/0x3000 arch/x86/include/generated/asm/syscalls_64.h:436
 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 0xffff888102727e40 of 184 bytes by task 21369 on cpu 1:
 prepare_creds+0x6e/0x550 kernel/cred.c:192
 __do_sys_capset kernel/capability.c:247 [inline]
 __se_sys_capset+0x2a3/0x450 kernel/capability.c:216
 __x64_sys_capset+0x31/0x40 kernel/capability.c:216
 x64_sys_call+0x2868/0x3000 arch/x86/include/generated/asm/syscalls_64.h:127
 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: 21369 Comm: syz.1.4559 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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