syzbot

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BUG: KCSAN: data-race in ieee80211_ibss_rx_no_sta / sta_info_insert_rcu

write to 0xffff8880246c8df8 of 8 bytes by task 12934 on cpu 1:
 sta_info_insert_finish net/mac80211/sta_info.c:655 [inline]
 sta_info_insert_rcu+0x33a/0x1120 net/mac80211/sta_info.c:733
 ieee80211_ibss_finish_sta+0x18e/0x230 net/mac80211/ibss.c:592
 ieee80211_ibss_work+0x142/0xd90 net/mac80211/ibss.c:1700
 ieee80211_iface_work+0x628/0x670 net/mac80211/iface.c:1445
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff8880246c8df8 of 8 bytes by interrupt on cpu 0:
 ieee80211_ibss_rx_no_sta+0x40/0x2e0 net/mac80211/ibss.c:1217
 ieee80211_accept_frame net/mac80211/rx.c:3990 [inline]
 ieee80211_prepare_and_rx_handle+0x125f/0x2f70 net/mac80211/rx.c:4489
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4628 [inline]
 ieee80211_rx_list+0x13a8/0x14b0 net/mac80211/rx.c:4746
 ieee80211_rx_napi+0x4f/0x130 net/mac80211/rx.c:4769
 ieee80211_rx include/net/mac80211.h:4508 [inline]
 ieee80211_tasklet_handler+0xef/0x140 net/mac80211/main.c:235
 tasklet_action_common+0x81/0xa0 kernel/softirq.c:555
 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:246 [inline]
 __local_bh_enable_ip+0xba/0xd0 kernel/softirq.c:196
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x33/0x40 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
 wg_packet_encrypt_worker+0x187/0xab0 drivers/net/wireguard/send.c:297
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker
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