rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (8017 ticks this GP) idle=793c/1/0x4000000000000000 softirq=16114/16288 fqs=5041
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1215011        916            0
rcu: 	cputime:    33840      18645           42   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=8697 q=3710 ncpus=2)
CPU: 0 UID: 0 PID: 6127 Comm: syz.2.60 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:lock_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 0b 4d 03 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000007630 EFLAGS: 00000206
RAX: 676937133c6f4b00 RBX: 0000000000000202 RCX: 676937133c6f4b00
RDX: 0000000000000001 RSI: ffffffff8dba9832 RDI: ffffffff8be33e00
RBP: ffff88810a07a7d8 R08: ffffc900000077c7 R09: 0000000000000000
R10: ffffc900000077b8 R11: fffff52000000ef9 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e13a120 R15: ffff88810a079cc0
FS:  00007f450989a6c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2a1052 CR3: 00000000351fc000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x19a9/0x2390
 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
 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_read_unlock_special+0x87/0x4b0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 d2 a2 f9 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc90004e27300 EFLAGS: 00000206
RAX: 676937133c6f4b00 RBX: 1ffff920009c4e64 RCX: 676937133c6f4b00
RDX: 0000000000000000 RSI: ffffffff8d9ba160 RDI: ffffffff8be33e00
RBP: ffffc90004e273d0 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: ffffffff8e13f400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x84/0xe0
 __reset_page_owner+0x85/0x1f0
 __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
 _raw_spin_unlock_irq+0x45/0x50
 acct_collect+0x5a2/0x770
 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: 0033:0x7f450898eba9
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:00007f450989a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f4508bd6098 RCX: 00007f450898eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4508bd6098
RBP: 00007f4508bd6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4508bd6128 R14: 00007ffdc5223e20 R15: 00007ffdc5223f08
 </TASK>
sched: DL replenish lagged too much
