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BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:70 [inline]
BUG: KASAN: null-ptr-deref in try_to_grab_pending+0xed/0x9e0 kernel/workqueue.c:1257
Write of size 8 at addr 0000000000000088 by task kworker/1:11/11880

CPU: 1 PID: 11880 Comm: kworker/1:11 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events cfg80211_destroy_iface_wk
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x137/0x1be lib/dump_stack.c:120
 __kasan_report mm/kasan/report.c:400 [inline]
 kasan_report+0x154/0x200 mm/kasan/report.c:413
 check_memory_region_inline mm/kasan/generic.c:134 [inline]
 check_memory_region+0x2b5/0x2f0 mm/kasan/generic.c:185
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:70 [inline]
 try_to_grab_pending+0xed/0x9e0 kernel/workqueue.c:1257
 __cancel_work_timer+0x84/0x540 kernel/workqueue.c:3098
 rhashtable_free_and_destroy+0x25/0x8a0 lib/rhashtable.c:1137
 mesh_table_free net/mac80211/mesh_pathtbl.c:70 [inline]
 mesh_pathtbl_unregister+0x4b/0xa0 net/mac80211/mesh_pathtbl.c:812
 rollback_registered_many+0x12b5/0x16b0 net/core/dev.c:9512
 rollback_registered net/core/dev.c:9540 [inline]
 unregister_netdevice_queue+0x2f3/0x4b0 net/core/dev.c:10716
 ieee80211_del_iface+0x12/0x20 net/mac80211/cfg.c:144
 rdev_del_virtual_intf net/wireless/rdev-ops.h:57 [inline]
 cfg80211_destroy_ifaces+0x122/0x1c0 net/wireless/core.c:334
 cfg80211_destroy_iface_wk+0x1d/0x30 net/wireless/core.c:346
 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275
 process_scheduled_works kernel/workqueue.c:2337 [inline]
 worker_thread+0xe28/0x1300 kernel/workqueue.c:2423
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
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