================================================================== BUG: KCSAN: data-race in __queue_work / wq_worker_running read-write to 0xffff888237c2abe0 of 4 bytes by task 883 on cpu 0: wq_worker_running+0x96/0xe0 kernel/workqueue.c:880 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x38b/0x8c0 kernel/locking/mutex.c:747 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1035 mutex_lock+0x23/0x30 kernel/locking/mutex.c:286 pcpu_balance_workfn+0x1f/0xb70 mm/percpu.c:2233 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 read to 0xffff888237c2abe0 of 4 bytes by task 1651 on cpu 1: __need_more_worker kernel/workqueue.c:785 [inline] insert_work kernel/workqueue.c:1365 [inline] __queue_work+0x79e/0xa60 kernel/workqueue.c:1517 queue_work_on+0x7e/0xe0 kernel/workqueue.c:1545 queue_work include/linux/workqueue.h:503 [inline] schedule_work include/linux/workqueue.h:564 [inline] pcpu_schedule_balance_work mm/percpu.c:204 [inline] pcpu_alloc+0x972/0xf60 mm/percpu.c:1871 __alloc_percpu_gfp+0x22/0x30 mm/percpu.c:1930 bpf_map_alloc_percpu+0xbd/0x200 kernel/bpf/syscall.c:481 prealloc_init kernel/bpf/hashtab.c:322 [inline] htab_map_alloc+0x863/0xd70 kernel/bpf/hashtab.c:555 find_and_alloc_map kernel/bpf/syscall.c:131 [inline] map_create+0x38a/0x6f0 kernel/bpf/syscall.c:1123 __sys_bpf+0x28c/0x630 kernel/bpf/syscall.c:4961 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] __se_sys_bpf kernel/bpf/syscall.c:5081 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5081 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1651 Comm: syz-executor.2 Not tainted 6.2.0-rc1-syzkaller-00084-gc8451c141e07-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 ==================================================================