==================================================================
BUG: KCSAN: data-race in __queue_work / wq_worker_running

read-write to 0xffff888237c2d164 of 4 bytes by task 3160 on cpu 0:
 wq_worker_running+0x98/0x120 kernel/workqueue.c:1265
 schedule_timeout+0x55/0x230 kernel/time/timer.c:2159
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0xfa/0x1b0 kernel/sched/completion.c:127
 rcu_barrier+0x426/0x530 kernel/rcu/tree.c:4132
 fqdir_free_fn+0x1e/0xe0 net/ipv4/inet_fragment.c:164
 process_one_work kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x5b8/0xa40 kernel/workqueue.c:2706
 worker_thread+0x525/0x730 kernel/workqueue.c:2787
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:243

read to 0xffff888237c2d164 of 4 bytes by interrupt on cpu 1:
 need_more_worker kernel/workqueue.c:835 [inline]
 kick_pool kernel/workqueue.c:1118 [inline]
 __queue_work+0x7ce/0xbb0 kernel/workqueue.c:1803
 queue_work_on+0x95/0xf0 kernel/workqueue.c:1837
 wg_queue_enqueue_per_device_and_peer drivers/net/wireguard/queueing.h:176 [inline]
 wg_packet_create_data drivers/net/wireguard/send.c:320 [inline]
 wg_packet_send_staged_packets+0x850/0xad0 drivers/net/wireguard/send.c:388
 wg_packet_send_keepalive+0xe2/0x100 drivers/net/wireguard/send.c:239
 wg_expired_send_persistent_keepalive+0x3c/0x50 drivers/net/wireguard/timers.c:141
 call_timer_fn+0x37/0x2f0 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x448/0x630 kernel/time/timer.c:2038
 run_timer_softirq+0x1d/0x40 kernel/time/timer.c:2051
 __do_softirq+0xc4/0x27b kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0x3b/0x90 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1076
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
 kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:705
 follow_pud_mask mm/gup.c:754 [inline]
 follow_p4d_mask mm/gup.c:784 [inline]
 follow_page_mask+0x137/0xd60 mm/gup.c:834
 __get_user_pages+0x3a3/0xe40 mm/gup.c:1239
 __get_user_pages_locked mm/gup.c:1509 [inline]
 get_dump_page+0xb7/0x1b0 mm/gup.c:2031
 dump_user_range+0xc6/0x550 fs/coredump.c:949
 elf_core_dump+0x1a8e/0x1bb0 fs/binfmt_elf.c:2077
 do_coredump+0x102a/0x1890 fs/coredump.c:764
 get_signal+0xdb5/0x10a0 kernel/signal.c:2879
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x8f/0x120 kernel/entry/common.c:225
 irqentry_exit+0x12/0x40 kernel/entry/common.c:328
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 25920 Comm: syz-executor.4 Not tainted 6.8.0-rc7-syzkaller-00229-g10d48d70e82d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================