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BUG: KCSAN: data-race in ieee80211_rx_handlers / ieee80211_sta_last_active

write to 0xffff88810a693220 of 8 bytes by interrupt on cpu 0:
 ieee80211_rx_h_sta_process net/mac80211/rx.c:1741 [inline]
 ieee80211_rx_handlers+0x67d/0x7030 net/mac80211/rx.c:3770
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3823 [inline]
 ieee80211_prepare_and_rx_handle+0x19e5/0x2f40 net/mac80211/rx.c:4503
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4626 [inline]
 ieee80211_rx_list+0x1398/0x14a0 net/mac80211/rx.c:4744
 ieee80211_rx_napi+0x4f/0x130 net/mac80211/rx.c:4767
 ieee80211_rx include/net/mac80211.h:4507 [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
 run_ksoftirqd+0x13/0x20 kernel/softirq.c:650
 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff88810a693220 of 8 bytes by task 1283 on cpu 1:
 ieee80211_sta_last_active+0x171/0x1b0 net/mac80211/sta_info.c:2546
 ieee80211_ibss_sta_expire net/mac80211/ibss.c:1265 [inline]
 ieee80211_sta_merge_ibss net/mac80211/ibss.c:1305 [inline]
 ieee80211_ibss_work+0x314/0xd90 net/mac80211/ibss.c:1711
 ieee80211_iface_work+0x628/0x670 net/mac80211/iface.c:1445
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x635/0xb90 kernel/workqueue.c:2421
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1283 Comm: kworker/u4:6 Not tainted 5.11.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy27 ieee80211_iface_work
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