================================================================== BUG: KCSAN: data-race in pcpu_alloc / pcpu_block_update_hint_alloc read-write to 0xffffffff883db4dc of 4 bytes by task 11322 on cpu 1: pcpu_update_empty_pages mm/percpu.c:602 [inline] pcpu_block_update_hint_alloc+0x5db/0x6a0 mm/percpu.c:923 pcpu_alloc_area+0x49f/0x4d0 mm/percpu.c:1258 pcpu_alloc+0x4b3/0x10d0 mm/percpu.c:1808 __alloc_percpu+0x24/0x30 mm/percpu.c:1943 perf_trace_event_reg kernel/trace/trace_event_perf.c:121 [inline] perf_trace_event_init+0x4d2/0x7a0 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:10102 perf_try_init_event+0xc3/0x2b0 kernel/events/core.c:11668 perf_init_event kernel/events/core.c:11738 [inline] perf_event_alloc+0x9f0/0x1720 kernel/events/core.c:12018 __do_sys_perf_event_open kernel/events/core.c:12525 [inline] __se_sys_perf_event_open+0x5f7/0x2170 kernel/events/core.c:12416 __x64_sys_perf_event_open+0x67/0x80 kernel/events/core.c:12416 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x72/0x7a read to 0xffffffff883db4dc of 4 bytes by task 11320 on cpu 0: pcpu_alloc+0x9aa/0x10d0 mm/percpu.c:1868 __alloc_percpu_gfp+0x26/0x30 mm/percpu.c:1930 bpf_map_alloc_percpu+0xab/0x200 kernel/bpf/syscall.c:466 prealloc_init+0x19f/0x470 kernel/bpf/hashtab.c:338 htab_map_alloc+0x637/0x8f0 kernel/bpf/hashtab.c:573 map_create+0x83c/0xb90 kernel/bpf/syscall.c:1320 __sys_bpf+0x667/0x7a0 kernel/bpf/syscall.c:5613 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5736 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x72/0x7a value changed: 0x0000000d -> 0x0000000b Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11320 Comm: syz-executor.3 Tainted: G W 6.9.0-rc2-syzkaller-00040-gb1e6ec0a0fd0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ==================================================================