rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10463 ticks this GP) idle=787c/1/0x4000000000000000 softirq=22104/22264 fqs=4825
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   929115        419            0
rcu: 	cputime:    34087      18401           52   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=15097 q=1847 ncpus=2)
CPU: 0 UID: 0 PID: 7356 Comm: syz.0.315 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:unwind_next_frame+0x1315/0x2390
Code: 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 <4c> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8
RSP: 0018:ffffc90000007378 EFLAGS: 00000246
RAX: fffffffff203f7a4 RBX: ffffffff8f702858 RCX: dffffc0000000000
RDX: ffffffff8f702854 RSI: ffffffff8fea5eca RDI: ffffffff8b9ec280
RBP: ffffffff8f702854 R08: 0000000000000002 R09: ffffffff81725d05
R10: ffffc90000007498 R11: ffffffff81aaefd0 R12: ffffffff817422c1
R13: ffffffff8f702854 R14: ffffc90000007448 R15: ffffffff8f702854
FS:  00007f1b6beb76c0(0000) GS:ffff8880b8d73000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5df2742fc8 CR3: 000000011ffb4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000082 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000000050060a
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 skb_copy+0x188/0x800
 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0
 mac80211_hwsim_tx_frame+0x1b5/0x200
 mac80211_hwsim_beacon_tx+0x3f0/0x860
 __iterate_interfaces+0x2ab/0x590
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180
 mac80211_hwsim_beacon+0xbb/0x180
 __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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 0b 2c 8c 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> c3 ae 54 f6 65 8b 05 cc cf 10 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90002c2eba0 EFLAGS: 00000206
RAX: ba671be67f0d2100 RBX: 0000000000000246 RCX: ba671be67f0d2100
RDX: 0000000000000007 RSI: ffffffff8d53a1aa RDI: 0000000000000001
RBP: ffffc90002c2ec28 R08: ffffffff8f5cd537 R09: 1ffffffff1eb9aa6
R10: dffffc0000000000 R11: fffffbfff1eb9aa7 R12: dffffc0000000000
R13: 0000000000002000 R14: ffffffff8e477cb0 R15: 1ffff92000585d74
 stack_depot_save_flags+0x41b/0x860
 save_stack+0x103/0x1f0
 __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
 _raw_spin_unlock_irqrestore+0xfd/0x110
 __put_partials+0x65/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 mas_dup_build+0x154/0xfe0
 __mt_dup+0x137/0x220
 dup_mmap+0x3c5/0x1ac0
 copy_mm+0x13c/0x4b0
 copy_process+0x1706/0x3c00
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1b6af8ec29
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:00007f1b6beb6fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f1b6b1d6090 RCX: 00007f1b6af8ec29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000025200000
RBP: 00007f1b6b011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f1b6b1d6128 R14: 00007f1b6b1d6090 R15: 00007fffc9bc60e8
 </TASK>
