rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10468 ticks this GP) idle=d0fc/1/0x4000000000000000 softirq=27206/27904 fqs=5227
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1303251       1487            0
rcu: 	cputime:    29617      22855           43   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=17089 q=1369 ncpus=2)
CPU: 0 UID: 0 PID: 7960 Comm: syz.4.519 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:__sanitizer_cov_trace_cmp8+0x2f/0x90
Code: 8b 04 24 65 48 8b 0c 25 08 40 a0 92 65 8b 15 68 91 e0 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 3c 16 00 00 00 <74> 4e 8b 91 18 16 00 00 83 fa 03 75 43 48 8b 91 20 16 00 00 44 8b
RSP: 0018:ffffc90000007ac8 EFLAGS: 00000246
RAX: ffffffff817485ed RBX: 0000000023031980 RCX: ffff8880269d9cc0
RDX: 0000000000000100 RSI: ffff8880a3031980 RDI: 0000000023031980
RBP: 0000000000212110 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffffea0000000000
R13: 0000000000000000 R14: ffff8880a3031980 R15: dffffc0000000000
FS:  00007f5f2a7a76c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f1537b6c0 CR3: 000000010e0e6000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __phys_addr+0x6d/0x180
 check_slab_allocation+0x1f/0x130
 kmem_cache_free+0x140/0x400
 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:__free_frozen_pages+0x557/0xd30
Code: 08 83 fd 20 0f 83 6f 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 18 80 3c 01 00 74 08 48 89 df e8 7c a6 0d 00 4c 8b 2b <49> 83 fd ff 0f 84 ad 06 00 00 4c 89 e8 48 c1 e8 3a 4c 8d 34 c5 c0
RSP: 0018:ffffc9000790ea88 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffea0000919800 RCX: 1ffffd4000123300
RDX: 0000000000000000 RSI: 00000000000000ff RDI: ffffed10048cc400
RBP: 0000000000000001 R08: dffffc0000000000 R09: 0000000000000000
R10: ffffed10048cc000 R11: fffffbfff1f47007 R12: 0000000000000000
R13: 00fff00000000000 R14: 0000000000000002 R15: 0000000000000000
 pagetable_dtor_free+0x2d2/0x3b0
 __mmdrop+0xb5/0x580
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule+0x0/0xc0
Code: 00 00 e8 93 8c 15 f6 e9 ce bc 01 00 cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 48 89 e5 41 56 53 48 83 e4 e0 48 83 ec 60 65 48 8b
RSP: 0018:ffffc9000790efe0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000a06 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8d9b6a7d RDI: 00000000ffffffff
RBP: ffffc9000790f030 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: ffffffff8e13f1c0 R14: ffffffff8e13fa00 R15: 1ffff92000f21e08
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irqrestore+0xfd/0x110
 rcu_preempt_deferred_qs_irqrestore+0x8bd/0xce0
 rcu_read_unlock_special+0x475/0x5e0
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc4/0xd30
 __slab_free+0x303/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 security_file_alloc+0x34/0x330
 init_file+0x93/0x2f0
 alloc_empty_file+0x6e/0x1d0
 path_openat+0x107/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5f2998ebe9
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:00007f5f2a7a7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5f29bc5fa0 RCX: 00007f5f2998ebe9
RDX: 000000000000275a RSI: 0000200000000040 RDI: 0000000000000005
RBP: 00007f5f29a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5f29bc6038 R14: 00007f5f29bc5fa0 R15: 00007fff2b812e28
 </TASK>
