rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=c73c/1/0x4000000000000000 softirq=26209/26355 fqs=5212
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1285660        588            0
rcu: 	cputime:    33419      19068           40   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=18917 q=10583 ncpus=2)
CPU: 1 UID: 0 PID: 8068 Comm: syz.4.494 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+0xeda/0x2390
Code: c1 e8 03 80 3c 28 00 4c 8b 7c 24 28 74 05 e8 1d 52 b0 00 49 c7 46 58 00 00 00 00 49 8d 5e 36 48 89 d8 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 41 12 00 00 c6 03 01 48 8b 14 24 e9 7d 02 00 00 4c 89
RSP: 0018:ffffc900001e0418 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffffc900001e051e RCX: 1ffff9200003c001
RDX: ffffc900001e04f8 RSI: 0000000000000003 RDI: ffffc900001e0540
RBP: dffffc0000000000 R08: 0000000000000018 R09: ffffffff8172c195
R10: ffffc900001e0538 R11: ffffffff81ac3930 R12: ffffc900034a7318
R13: ffffc900001e0538 R14: ffffc900001e04e8 R15: 1ffffffff2055230
FS:  00007ff7d5e966c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 000000010e9fe000 CR4: 00000000000006f0
DR0: 0000200000000300 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
 __alloc_skb+0x112/0x2d0
 __netdev_alloc_skb+0x108/0x970
 __ieee80211_beacon_get+0xc06/0x1880
 ieee80211_beacon_get_tim+0xb4/0x2b0
 mac80211_hwsim_beacon_tx+0x3ce/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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 4b 87 4b 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> 93 2e 14 f6 65 8b 05 6c 71 24 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900034a73c0 EFLAGS: 00000206
RAX: 4b6e22ee44d38d00 RBX: 0000000000000a06 RCX: 4b6e22ee44d38d00
RDX: 0000000000000000 RSI: ffffffff8d9b6a0a RDI: 0000000000000001
RBP: ffffc900034a7450 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8e21e080 R15: 1ffff92000694e78
 __mmdrop+0x2f4/0x580
 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_common+0x2/0xd0
Code: cc e8 22 00 00 00 eb cc e8 0b d7 fe ff 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 41 57 <41> 56 53 49 bf 00 00 00 00 00 fc ff df eb 0d 48 f7 03 08 00 00 00
RSP: 0018:ffffc900034a7890 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff92000694f14 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000ffffffff
RBP: ffffc900034a7910 R08: ffff888024d0a0cb R09: 1ffff110049a1419
R10: dffffc0000000000 R11: ffffed10049a141a R12: dffffc0000000000
R13: ffffc900034a7aa0 R14: dffffc0000000000 R15: ffff888022e08000
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock+0x3f/0x50
 futex_wait_setup+0x43d/0x590
 __futex_wait+0x148/0x3e0
 futex_wait+0x104/0x360
 do_futex+0x333/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff7d4f8ebe9
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:00007ff7d5e960e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ff7d51b5fa8 RCX: 00007ff7d4f8ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff7d51b5fa8
RBP: 00007ff7d51b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff7d51b6038 R14: 00007ffdddea86d0 R15: 00007ffdddea87b8
 </TASK>
