syzbot

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BUG: KCSAN: data-race in insert_work / wq_worker_running

read-write to 0xffff888237c2a860 of 4 bytes by task 9882 on cpu 0:
 wq_worker_running+0x96/0xe0 kernel/workqueue.c:880
 synchronize_rcu_expedited+0x629/0x7c0 kernel/rcu/tree_exp.h:955
 synchronize_rcu+0x62/0x380 kernel/rcu/tree.c:3519
 sock_hash_free+0x3af/0x400 net/core/sock_map.c:1159
 bpf_map_free_deferred+0x99/0x100 kernel/bpf/syscall.c:620
 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

read to 0xffff888237c2a860 of 4 bytes by task 1169 on cpu 1:
 __need_more_worker kernel/workqueue.c:785 [inline]
 insert_work+0x10e/0x190 kernel/workqueue.c:1365
 __queue_work+0x69e/0x8e0 kernel/workqueue.c:1517
 queue_work_on+0x7e/0xe0 kernel/workqueue.c:1545
 srcu_queue_delayed_work_on kernel/rcu/srcutree.c:697 [inline]
 srcu_schedule_cbs_sdp kernel/rcu/srcutree.c:710 [inline]
 srcu_gp_end kernel/rcu/srcutree.c:777 [inline]
 srcu_advance_state kernel/rcu/srcutree.c:1526 [inline]
 process_srcu+0x6b1/0xa70 kernel/rcu/srcutree.c:1622
 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

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1169 Comm: kworker/1:96 Not tainted 5.19.0-syzkaller-12689-g3bc1bc0b59d0-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: rcu_gp process_srcu
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