rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (9857 ticks this GP) idle=88a4/1/0x4000000000000000 softirq=62307/62307 fqs=4441
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1018153          1            0
rcu: 	cputime:    31365      21114           97   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=48693 q=2240 ncpus=2)
CPU: 0 UID: 0 PID: 14706 Comm: syz.6.2556 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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 2b 0c 4a f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 b0 12 f6 65 8b 05 6c 81 23 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90000007c20 EFLAGS: 00000206
RAX: 0c7c88880a202700 RBX: 0000000000000a06 RCX: 0c7c88880a202700
RDX: 0000000000000000 RSI: ffffffff8d9baa25 RDI: 0000000000000001
RBP: ffffc90000007ca0 R08: ffffffff8fa3b237 R09: 1ffffffff1f47646
R10: dffffc0000000000 R11: fffffbfff1f47647 R12: dffffc0000000000
R13: ffff888063dc8608 R14: ffff8880392d1640 R15: 1ffff92000000f84
FS:  00007f3588bea6c0(0000) GS:ffff8880b8612000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000129596000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 skb_dequeue+0x10e/0x150
 ieee80211_handle_queued_frames+0x4a/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:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1a 21 20 f6 48 89 df e8 72 b8 20 f6 e8 6d 0b 4a f6 fb bf 01 00 00 00 <e8> 42 b0 12 f6 65 8b 05 cb 80 23 07 85 c0 74 07 5b c3 cc cc cc cc
RSP: 0018:ffffc90007517bb0 EFLAGS: 00000282
RAX: 0c7c88880a202700 RBX: ffff8880275b26d0 RCX: 0c7c88880a202700
RDX: 0000000000000000 RSI: ffffffff8d9baa25 RDI: 0000000000000001
RBP: ffffc90007517c80 R08: ffffffff8fa3b237 R09: 1ffffffff1f47646
R10: dffffc0000000000 R11: fffffbfff1f47647 R12: dffffc0000000000
R13: ffff8880275b3258 R14: ffff8880275b26d0 R15: ffff8880275b2638
 task_work_run+0x191/0x260
 get_signal+0x11ed/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: 0033:0x7f3587d8ec29
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:00007f3588bea0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f3587fd5fa8 RCX: 00007f3587d8ec29
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3587fd5fac
RBP: 00007f3587fd5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3587fd6038 R14: 00007fff1fbc7a20 R15: 00007fff1fbc7b08
 </TASK>
sched: DL replenish lagged too much
