netlink: 96 bytes leftover after parsing attributes in process `syz.8.8873'.
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BUG: KCSAN: data-race in copy_mm / percpu_counter_destroy_many

write to 0xffff88810c523db0 of 8 bytes by task 29096 on cpu 0:
 __list_del include/linux/list.h:203 [inline]
 __list_del_entry include/linux/list.h:226 [inline]
 list_del include/linux/list.h:237 [inline]
 percpu_counter_destroy_many+0xc7/0x2b0 lib/percpu_counter.c:244
 __mmdrop+0x22d/0x3c0 kernel/fork.c:691
 mmdrop include/linux/sched/mm.h:55 [inline]
 __mmput+0x1be/0x1c0 kernel/fork.c:1145
 mmput+0x40/0x50 kernel/fork.c:1156
 free_bprm+0xe4/0x220 fs/exec.c:1385
 do_execveat_common+0x560/0x750 fs/exec.c:1862
 do_execveat fs/exec.c:1945 [inline]
 __do_sys_execveat fs/exec.c:2019 [inline]
 __se_sys_execveat fs/exec.c:2013 [inline]
 __x64_sys_execveat+0x73/0x90 fs/exec.c:2013
 x64_sys_call+0x1fec/0x3000 arch/x86/include/generated/asm/syscalls_64.h:323
 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 0xffff88810c523980 of 1408 bytes by task 29134 on cpu 1:
 dup_mm kernel/fork.c:1483 [inline]
 copy_mm+0xe2/0x370 kernel/fork.c:1541
 copy_process+0xd08/0x2000 kernel/fork.c:2181
 kernel_clone+0x16c/0x5c0 kernel/fork.c:2609
 __do_sys_clone kernel/fork.c:2750 [inline]
 __se_sys_clone kernel/fork.c:2734 [inline]
 __x64_sys_clone+0xe6/0x120 kernel/fork.c:2734
 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: 1 UID: 60929 PID: 29134 Comm: syz.8.8873 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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