==================================================================
BUG: KCSAN: data-race in pcpu_alloc / pcpu_free_area

read-write to 0xffffffff884054dc of 4 bytes by task 20032 on cpu 1:
 pcpu_update_empty_pages mm/percpu.c:602 [inline]
 pcpu_block_update_hint_free mm/percpu.c:1044 [inline]
 pcpu_free_area+0x4e2/0x570 mm/percpu.c:1302
 free_percpu+0x1c6/0xb30 mm/percpu.c:2303
 perf_trace_event_unreg+0x120/0x1a0 kernel/trace/trace_event_perf.c:175
 perf_trace_destroy+0x6a/0xe0 kernel/trace/trace_event_perf.c:241
 tp_perf_event_destroy+0x15/0x20 kernel/events/core.c:10086
 _free_event+0x732/0x980 kernel/events/core.c:5223
 put_event kernel/events/core.c:5320 [inline]
 perf_event_release_kernel+0x5d1/0x620 kernel/events/core.c:5432
 perf_release+0x25/0x30 kernel/events/core.c:5442
 __fput+0x2c1/0x660 fs/file_table.c:422
 __fput_sync+0x44/0x60 fs/file_table.c:507
 __do_sys_close fs/open.c:1556 [inline]
 __se_sys_close+0x101/0x1b0 fs/open.c:1541
 __x64_sys_close+0x1f/0x30 fs/open.c:1541
 x64_sys_call+0x25b9/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff884054dc of 4 bytes by task 20046 on cpu 0:
 pcpu_alloc+0x9aa/0x10d0 mm/percpu.c:1868
 __alloc_percpu+0x24/0x30 mm/percpu.c:1943
 packet_alloc_pending net/packet/af_packet.c:1232 [inline]
 packet_create+0x1ad/0x4d0 net/packet/af_packet.c:3367
 __sock_create+0x2db/0x4f0 net/socket.c:1571
 sock_create net/socket.c:1622 [inline]
 __sys_socket_create net/socket.c:1659 [inline]
 __sys_socket+0xae/0x240 net/socket.c:1706
 __do_sys_socket net/socket.c:1720 [inline]
 __se_sys_socket net/socket.c:1718 [inline]
 __x64_sys_socket+0x3f/0x50 net/socket.c:1718
 x64_sys_call+0x21c3/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:42
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000026 -> 0x00000028

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 20046 Comm: syz-executor.0 Tainted: G        W          6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
==================================================================