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BUG: KCSAN: data-race in copy_mm / copy_page_range

write to 0xffff88810554edb8 of 8 bytes by task 3322 on cpu 1:
 __list_add include/linux/list.h:161 [inline]
 list_add include/linux/list.h:177 [inline]
 copy_nonpresent_pte mm/memory.c:944 [inline]
 copy_pte_range mm/memory.c:1280 [inline]
 copy_pmd_range mm/memory.c:1392 [inline]
 copy_pud_range mm/memory.c:1429 [inline]
 copy_p4d_range mm/memory.c:1453 [inline]
 copy_page_range+0x253b/0x32f0 mm/memory.c:1539
 dup_mmap+0x88f/0x10c0 mm/mmap.c:1840
 dup_mm kernel/fork.c:1534 [inline]
 copy_mm+0x119/0x370 kernel/fork.c:1586
 copy_process+0x1084/0x23a0 kernel/fork.c:2262
 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

read to 0xffff88810554ec00 of 1664 bytes by task 3321 on cpu 0:
 dup_mm kernel/fork.c:1528 [inline]
 copy_mm+0xe1/0x370 kernel/fork.c:1586
 copy_process+0x1084/0x23a0 kernel/fork.c:2262
 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: 0 UID: 0 PID: 3321 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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