rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (8975 ticks this GP) idle=50c4/1/0x4000000000000000 softirq=22624/22625 fqs=4814
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   784036          6            0
rcu: 	cputime:    37650      14839           62   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=15905 q=2323 ncpus=2)
CPU: 1 UID: 0 PID: 7626 Comm: syz.2.496 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__ieee80211_queue_skb_to_iface+0xde/0x280
Code: 08 4c 89 e7 e8 f3 c7 2d f7 4d 8b 24 24 49 83 c4 40 4c 89 e0 48 c1 e8 03 80 3c 28 00 48 8b 1c 24 74 08 4c 89 e7 e8 d2 c7 2d f7 <49> 8b 3c 24 49 81 c7 f8 0b 00 00 4c 89 fe e8 5f f6 d2 ff 48 85 db
RSP: 0018:ffffc900001e0478 EFLAGS: 00000246
RAX: 1ffff110061bf1d0 RBX: 0000000000000000 RCX: 0000000000000300
RDX: 0000000000000002 RSI: ffffffff8d9b6ad4 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffffffff8fa38137 R09: 1ffffffff1f47026
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: ffff888030df8e80
R13: ffff88803fc516d5 R14: 00000000ffffffff R15: ffff888030db0d80
FS:  00007fbc86b516c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc85e11e19 CR3: 000000002229e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 ieee80211_rx_h_mgmt+0x493/0x650
 ieee80211_rx_handlers+0x668c/0xb760
 ieee80211_prepare_and_rx_handle+0x266f/0x63f0
 ieee80211_rx_list+0x21b8/0x2a90
 ieee80211_rx_napi+0x1a8/0x3d0
 ieee80211_handle_queued_frames+0xe8/0x1f0
 tasklet_action_common+0x36c/0x580
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 fb 88 15 f6 e8 36 e3 4c f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90004eff6e0 EFLAGS: 00000282
RAX: 443a892d42cb8d00 RBX: 0000000000000000 RCX: 443a892d42cb8d00
RDX: 0000000000000007 RSI: ffffffff8d9b6ad4 RDI: 0000000000000001
RBP: ffffc90004eff780 R08: ffffffff8fa38137 R09: 1ffffffff1f47026
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920009dfedc
 irqentry_exit+0x6f/0x90
 asm_common_interrupt+0x26/0x40
RIP: 0010:mtree_range_walk+0x6b7/0x840
Code: af 20 b2 f6 e9 47 fb ff ff e8 65 9e 4e f6 89 d8 e9 09 fb ff ff e8 59 9e 4e f6 48 8b 54 24 08 48 8d 7a 3f 48 89 f8 48 c1 e8 03 <0f> b6 04 28 84 c0 0f 85 19 01 00 00 8b 44 24 04 88 42 3f 4c 8d 72
RSP: 0018:ffffc90004eff840 EFLAGS: 00000a07
RAX: 1ffff920009dff47 RBX: 0000000000000000 RCX: ffff8881067f5640
RDX: ffffc90004effa00 RSI: ffff888109bfb600 RDI: ffffc90004effa3f
RBP: dffffc0000000000 R08: ffff8881067f5640 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000
R13: 000000110c22ffff R14: ffff888109bfb600 R15: ffff888109bfb800
 mas_find+0x8e9/0xd30
 acct_collect+0x18c/0x770
 do_exit+0x5c3/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc85d8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbc86b51038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000047 RBX: 00007fbc85fc5fa0 RCX: 00007fbc85d8ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007fbc85e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbc85fc6038 R14: 00007fbc85fc5fa0 R15: 00007fff584f16f8
 </TASK>
sched: DL replenish lagged too much
