rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10365 ticks this GP) idle=0664/1/0x4000000000000000 softirq=29081/29149 fqs=5071
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   945907        229            0
rcu: 	cputime:    34047      18431           51   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=18897 q=2528 ncpus=2)
CPU: 1 UID: 0 PID: 8001 Comm: syz.3.556 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:__read_once_word_nocheck+0x3/0x10
Code: b0 00 48 ba 00 00 00 00 00 fc ff df e9 88 fc ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900001e05f0 EFLAGS: 00000202
RAX: ffffffff817494c2 RBX: ffffc90002e1f618 RCX: 1ffff9200003c001
RDX: ffffffff903fae32 RSI: 0000000000000002 RDI: ffffc90002e1f618
RBP: 1ffff9200003c0da R08: 0000000000000001 R09: ffffffff8172d195
R10: ffffc900001e0718 R11: ffffffff81ac4d00 R12: ffffc90002e20000
R13: 1ffff9200003c0db R14: ffffc900001e06c8 R15: ffffc90002e18000
FS:  00007fe0bc7656c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010efdc000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 unwind_next_frame+0xc3c/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 skb_release_data+0x62d/0x7c0
 consume_skb+0x9e/0xf0
 mac80211_hwsim_beacon_tx+0x3f0/0x860
 __iterate_interfaces+0x2ab/0x590
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180
 mac80211_hwsim_beacon+0xbb/0x1c0
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 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:rcu_is_watching+0x3a/0xb0
Code: e8 1b 1f d4 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 10 2d be 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 1c f6 7c 00 48 c7 c3 98 ff a1 92 49 03 1e 48 89
RSP: 0018:ffffc90002e1f130 EFLAGS: 00000246
RAX: 1ffffffff1b7c5a3 RBX: 0000000000000001 RCX: b807913b5726a100
RDX: ffffc90002e1f301 RSI: ffffffff8be33e60 RDI: ffffffff8be33e20
RBP: dffffc0000000000 R08: ffffc90002e1f370 R09: 0000000000000000
R10: ffffc90002e1f338 R11: fffff520005c3e69 R12: ffffc90002e1f380
R13: ffffffff8172d195 R14: ffffffff8dbe2d18 R15: dffffc0000000000
 lock_release+0x4b/0x3e0
 unwind_next_frame+0x19a9/0x2390
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc4/0xd30
 pagetable_dtor_free+0x2d2/0x3b0
 __mmdrop+0xb5/0x570
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 smp_call_function_single+0x470/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x193a/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe0bb98eba9
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:00007fe0bc765038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe0bbbd5fa0 RCX: 00007fe0bb98eba9
RDX: ffefffffffffffff RSI: 0000000000000000 RDI: 00002000000004c0
RBP: 00007fe0bba11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe0bbbd6038 R14: 00007fe0bbbd5fa0 R15: 00007ffcb36f72c8
 </TASK>
sched: DL replenish lagged too much
