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BUG: KCSAN: data-race in copy_creds / prepare_creds

write to 0xffff8881046269a8 of 4 bytes by task 6445 on cpu 0:
 get_cred_many include/linux/cred.h:222 [inline]
 copy_creds+0x78/0x340 kernel/cred.c:278
 copy_process+0x890/0x2310 kernel/fork.c:2153
 kernel_clone+0x1c0/0x5f0 kernel/fork.c:2748
 __do_sys_clone3 kernel/fork.c:3050 [inline]
 __se_sys_clone3+0x1f5/0x230 kernel/fork.c:3029
 __x64_sys_clone3+0x31/0x40 kernel/fork.c:3029
 x64_sys_call+0x580/0x3020 arch/x86/include/generated/asm/syscalls_64.h:436
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888104626900 of 184 bytes by task 6449 on cpu 1:
 prepare_creds+0x71/0x550 kernel/cred.c:192
 copy_creds+0x8f/0x340 kernel/cred.c:286
 copy_process+0x890/0x2310 kernel/fork.c:2153
 kernel_clone+0x1c0/0x5f0 kernel/fork.c:2748
 __do_sys_clone kernel/fork.c:2889 [inline]
 __se_sys_clone kernel/fork.c:2873 [inline]
 __x64_sys_clone+0x143/0x180 kernel/fork.c:2873
 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+0x136/0x3c0 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: 6449 Comm: syz.5.874 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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