rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10473 ticks this GP) idle=84e4/1/0x4000000000000000 softirq=23905/24131 fqs=5215
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1259216        797            0
rcu: 	cputime:    32403      20083           38   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=17821 q=1362 ncpus=2)
CPU: 0 UID: 0 PID: 7993 Comm: syz.1.646 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+0x14c/0x2390
Code: 38 80 3c 28 00 74 08 4c 89 ef e8 bf 5e b0 00 49 8b 5d 00 48 85 db 74 23 48 81 c3 88 00 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 45 1b 00 00 f6 03 03 0f 85 e4 17 00 00 49 8d 5e 35 48
RSP: 0018:ffffc90000007378 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffc9000602fae0 RCX: 0d747f286ff73700
RDX: 0000000000000000 RSI: ffffffff8be332e0 RDI: ffffffff8be332a0
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8172c195
R10: ffffc90000007498 R11: ffffffff81ac3930 R12: 1ffff92000000e89
R13: ffffc90000007498 R14: ffffc90000007448 R15: ffffffff8172c195
FS:  00007f6b5fa076c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feaa3463fc8 CR3: 00000000395fc000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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/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:unwind_next_frame+0x395/0x2390
Code: e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 6d 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 80 19 00 00 41 0f b6 44 24 01 <83> e0 07 0f 84 75 15 00 00 83 f8 01 4c 8b 7c 24 48 48 bd 00 00 00
RSP: 0018:ffffc9000602f218 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff8fbf96bc RCX: ffffffff8fbf96c0
RDX: ffffffff903fabc6 RSI: ffffffff903fabc6 RDI: ffffffff8be332a0
RBP: dffffc0000000000 R08: 0000000000000009 R09: ffffffff8172c195
R10: dffffc0000000000 R11: ffffffff81ac3930 R12: ffffffff903fabca
R13: ffffffff903fabcb R14: ffffc9000602f2e8 R15: ffffffff8fbf96bc
 arch_stack_walk+0x11c/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+0xb5/0x580
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:kmem_cache_alloc_lru_noprof+0x1ce/0x3d0
Code: 15 87 5d 8b 0d 21 ea 0f 1f 44 00 00 0f 1f 44 00 00 44 89 f8 0f b6 c8 4c 89 f7 4c 89 e6 e8 4a c4 0a 00 48 89 c3 48 89 44 24 18 <48> 85 c0 0f 94 c0 41 80 f7 01 41 08 c7 75 0d 44 89 ea 48 89 df 31
RSP: 0018:ffffc9000602fb00 EFLAGS: 00000282
RAX: ffff8881084c98f8 RBX: ffff8881084c98f8 RCX: 0000000000001f39
RDX: 00000000fe1c3df6 RSI: 0000000000000001 RDI: 00000000c326e08a
RBP: 0000000000000cc0 R08: 0000000075ac4f9f R09: 0000000039be408b
R10: 000000000000000a R11: ffffffff81ac3930 R12: ffff8881084c98f8
R13: 0000000000000138 R14: ffff888100014780 R15: 000000000003c101
 __d_alloc+0x36/0x7a0
 d_alloc_pseudo+0x21/0xc0
 alloc_file_pseudo+0xcc/0x210
 anon_inode_getfile+0xc5/0x1a0
 __se_sys_perf_event_open+0xf20/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b5eb8ebe9
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:00007f6b5fa07038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f6b5edb5fa0 RCX: 00007f6b5eb8ebe9
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007f6b5ec11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b5edb6038 R14: 00007f6b5edb5fa0 R15: 00007fff479c16f8
 </TASK>
