------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 0 PID: 12186 at kernel/locking/lockdep.c:1960 print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Modules linked in: CPU: 0 PID: 12186 Comm: kworker/u4:11 Not tainted 5.9.0-rc7-next-20200930-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy7 ieee80211_iface_work RIP: 0010:print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Code: e2 08 00 74 2c 48 c7 c7 c0 7f a6 8d e8 49 51 01 00 66 90 85 db 75 05 5b 5d 41 5c c3 89 ee 48 c7 c7 20 e8 ab 88 e8 7b e5 c0 06 <0f> 0b 5b 5d 41 5c c3 0f 0b e8 62 82 e9 06 85 c0 74 d7 48 c7 c0 38 RSP: 0018:ffffc900160bf240 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff88808bb380c0 RSI: ffffffff815df1a5 RDI: fffff52002c17e3a RBP: 00000000ffffffff R08: 0000000000000001 R09: ffff8880ae420f8b R10: 0000000000000000 R11: 207065646b636f6c R12: ffff88808bb380c0 R13: dffffc0000000000 R14: 0000000000000006 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd70fefff8 CR3: 00000000941a3000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: check_irq_usage+0x6b4/0xc60 kernel/locking/lockdep.c:2585 check_prev_add kernel/locking/lockdep.c:2823 [inline] check_prevs_add kernel/locking/lockdep.c:2944 [inline] validate_chain kernel/locking/lockdep.c:3562 [inline] __lock_acquire+0x2873/0x56d0 kernel/locking/lockdep.c:4796 lock_acquire+0x1f2/0xaa0 kernel/locking/lockdep.c:5398 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 alloc_object lib/debugobjects.c:239 [inline] __debug_object_init+0x5c6/0xd10 lib/debugobjects.c:548 debug_object_init lib/debugobjects.c:595 [inline] debug_object_activate+0x32c/0x3e0 lib/debugobjects.c:681 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline] __call_rcu kernel/rcu/tree.c:2943 [inline] call_rcu+0x2c/0x7d0 kernel/rcu/tree.c:3030 destroy_inode+0x129/0x1b0 fs/inode.c:289 iput_final fs/inode.c:1654 [inline] iput.part.0+0x3fe/0x820 fs/inode.c:1680 iput+0x58/0x70 fs/inode.c:1670 dentry_unlink_inode+0x2b1/0x3d0 fs/dcache.c:374 __dentry_kill+0x3c0/0x640 fs/dcache.c:579 dentry_kill fs/dcache.c:717 [inline] dput+0x635/0xbc0 fs/dcache.c:878 find_next_child fs/libfs.c:263 [inline] simple_recursive_removal+0x136/0x6b0 fs/libfs.c:278 debugfs_remove fs/debugfs/inode.c:725 [inline] debugfs_remove+0x59/0x80 fs/debugfs/inode.c:719 ieee80211_sta_debugfs_remove+0x34/0x70 net/mac80211/debugfs_sta.c:1046 __sta_info_destroy_part2+0x306/0x4d0 net/mac80211/sta_info.c:1091 __sta_info_destroy+0x36/0x50 net/mac80211/sta_info.c:1105 ieee80211_ibss_sta_expire net/mac80211/ibss.c:1284 [inline] ieee80211_sta_merge_ibss net/mac80211/ibss.c:1305 [inline] ieee80211_ibss_work+0x625/0xe80 net/mac80211/ibss.c:1711 ieee80211_iface_work+0x82e/0x970 net/mac80211/iface.c:1497 process_one_work+0x933/0x15a0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296