clocksource: Long readout interval, skipping watchdog check: cs_nsec: 60635748209 wd_nsec: 60635749622
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10457 ticks this GP) idle=950c/1/0x4000000000000000 softirq=17541/17574 fqs=4595
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   983719         63            0
rcu: 	cputime:    34108      18370           51   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=9621 q=2551 ncpus=2)
CPU: 1 UID: 0 PID: 6775 Comm: syz.2.272 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_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 4b e3 02 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900001e0338 EFLAGS: 00000206
RAX: 27a3c7de2ed7e000 RBX: 0000000000000000 RCX: 27a3c7de2ed7e000
RDX: 0000000000000000 RSI: ffffffff8dba5d65 RDI: ffffffff8be33300
RBP: ffffffff8172c195 R08: 0000000000000000 R09: ffffffff8172c195
R10: ffffc900001e04f8 R11: ffffffff81ac3930 R12: 0000000000000002
R13: ffffffff8e139ea0 R14: 0000000000000000 R15: 0000000000000246
FS:  00007f65ab05f6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fd0d9b8e48 CR3: 000000011e496000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000050602
Call Trace:
 <IRQ>
 unwind_next_frame+0xc2/0x2390
 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
 __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:preempt_schedule_irq+0xbe/0x150
Code: 03 08 00 00 00 74 64 bf 01 00 00 00 e8 fb 88 15 f6 e8 36 e3 4c f6 fb bf 01 00 00 00 e8 5b ab ff ff 48 c7 44 24 40 00 00 00 00 <9c> 8f 44 24 40 8b 44 24 40 fa a9 00 02 00 00 74 05 e8 bc e4 4c f6
RSP: 0018:ffffc90006f37d60 EFLAGS: 00000246
RAX: 27a3c7de2ed7e000 RBX: 0000000000000000 RCX: 27a3c7de2ed7e000
RDX: 0000000000000000 RSI: ffffffff8be332e0 RDI: ffffffff8be332a0
RBP: ffffc90006f37e10 R08: ffffffff8fa38137 R09: 1ffffffff1f47026
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000de6fac
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:exit_to_user_mode_loop+0x45/0x110
Code: eb 1e e8 de 21 cf 09 65 48 8b 04 25 08 40 a0 92 4c 8b 30 41 f7 c6 1e 30 02 00 0f 84 c5 00 00 00 e8 80 16 1d 00 fb 41 f6 c6 18 <74> 05 e8 74 2b d0 09 41 f7 c6 00 10 00 00 74 08 48 89 df e8 93 35
RSP: 0018:ffffc90006f37ed0 EFLAGS: 00000246
RAX: 27a3c7de2ed7e000 RBX: ffffc90006f37f58 RCX: 27a3c7de2ed7e000
RDX: 0000000000000000 RSI: ffffffff8d9b6adf RDI: ffffffff8be33300
RBP: ffffc90006f37f48 R08: ffffffff8fa38137 R09: 1ffffffff1f47026
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: 0000000000000000
R13: 000000000000012a R14: 0000000000004006 R15: ffff888109793980
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65aa18eba9
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:00007f65ab05f038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 000000000000000f RBX: 00007f65aa3d5fa0 RCX: 00007f65aa18eba9
RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f65aa211e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f65aa3d6038 R14: 00007f65aa3d5fa0 R15: 00007ffc5fb94df8
 </TASK>
