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BUG: KCSAN: data-race in __percpu_counter_init_many / copy_mm

write to 0xffff8881200e37f0 of 8 bytes by task 3299 on cpu 1:
 __list_add include/linux/list.h:153 [inline]
 list_add include/linux/list.h:169 [inline]
 __percpu_counter_init_many+0x292/0x310 lib/percpu_counter.c:220
 mm_init+0x6a5/0x7f0 kernel/fork.c:1083
 dup_mm kernel/fork.c:1482 [inline]
 copy_mm+0x101/0x370 kernel/fork.c:1538
 copy_process+0xd08/0x2000 kernel/fork.c:2180
 kernel_clone+0x16c/0x5c0 kernel/fork.c:2610
 __do_sys_clone kernel/fork.c:2753 [inline]
 __se_sys_clone kernel/fork.c:2737 [inline]
 __x64_sys_clone+0xe6/0x120 kernel/fork.c:2737
 x64_sys_call+0x119c/0x3000 arch/x86/include/generated/asm/syscalls_64.h:57
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881200e33c0 of 1408 bytes by task 6359 on cpu 0:
 dup_mm kernel/fork.c:1480 [inline]
 copy_mm+0xe2/0x370 kernel/fork.c:1538
 copy_process+0xd08/0x2000 kernel/fork.c:2180
 kernel_clone+0x16c/0x5c0 kernel/fork.c:2610
 __do_sys_clone kernel/fork.c:2753 [inline]
 __se_sys_clone kernel/fork.c:2737 [inline]
 __x64_sys_clone+0xe6/0x120 kernel/fork.c:2737
 x64_sys_call+0x119c/0x3000 arch/x86/include/generated/asm/syscalls_64.h:57
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 6359 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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