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BUG: KCSAN: data-race in pcpu_alloc_noprof / pcpu_block_update_hint_alloc

read-write to 0xffffffff8864d4dc of 4 bytes by task 3890 on cpu 0:
 pcpu_update_empty_pages mm/percpu.c:602 [inline]
 pcpu_block_update_hint_alloc+0x5db/0x6a0 mm/percpu.c:923
 pcpu_alloc_area+0x488/0x4b0 mm/percpu.c:1258
 pcpu_alloc_noprof+0x4b3/0x10c0 mm/percpu.c:1834
 perf_trace_event_reg kernel/trace/trace_event_perf.c:121 [inline]
 perf_trace_event_init+0x543/0x7c0 kernel/trace/trace_event_perf.c:202
 perf_trace_init+0x159/0x1d0 kernel/trace/trace_event_perf.c:226
 perf_tp_event_init+0x67/0xd0 kernel/events/core.c:10245
 perf_try_init_event+0xc3/0x2b0 kernel/events/core.c:11720
 perf_init_event kernel/events/core.c:11790 [inline]
 perf_event_alloc+0xacc/0x1750 kernel/events/core.c:12070
 __do_sys_perf_event_open kernel/events/core.c:12577 [inline]
 __se_sys_perf_event_open+0x837/0x2170 kernel/events/core.c:12468
 __x64_sys_perf_event_open+0x67/0x80 kernel/events/core.c:12468
 x64_sys_call+0x27c0/0x2e00 arch/x86/include/generated/asm/syscalls_64.h:299
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff8864d4dc of 4 bytes by task 3879 on cpu 1:
 pcpu_alloc_noprof+0x9a7/0x10c0 mm/percpu.c:1894
 mm_alloc_cid_noprof include/linux/mm_types.h:1177 [inline]
 mm_init+0x47f/0x730 kernel/fork.c:1297
 dup_mm kernel/fork.c:1668 [inline]
 copy_mm+0x11e/0x10e0 kernel/fork.c:1720
 copy_process+0xee1/0x1f90 kernel/fork.c:2373
 kernel_clone+0x167/0x5e0 kernel/fork.c:2780
 __do_sys_clone kernel/fork.c:2923 [inline]
 __se_sys_clone kernel/fork.c:2907 [inline]
 __x64_sys_clone+0xe8/0x120 kernel/fork.c:2907
 x64_sys_call+0x2dc4/0x2e00 arch/x86/include/generated/asm/syscalls_64.h:57
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000012 -> 0x0000000e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3879 Comm: dhcpcd-run-hook Not tainted 6.10.0-syzkaller-09061-g4305ca0087dd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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