rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=95dc/1/0x4000000000000000 softirq=17765/17765 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=12013, q=370 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6605 Comm: syz.1.156 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:hrtimer_try_to_cancel+0xb2/0x420
Code: 00 00 8b 2b 89 ee 83 e6 01 31 ff e8 28 2d 12 00 89 e8 83 e0 01 0f 85 02 01 00 00 e8 d8 28 12 00 48 8b 44 24 28 42 0f b6 04 30 <84> c0 0f 85 ac 00 00 00 48 8b 04 24 44 0f b6 28 31 ff 44 89 ee e8
RSP: 0018:ffffc90000007928 EFLAGS: 00000006
RAX: 0000000000000000 RBX: ffff88804b027b50 RCX: ffff888105ff1d00
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000010d186 R08: ffff88804b027ac3 R09: 1ffff11009604f58
R10: dffffc0000000000 R11: ffffed1009604f59 R12: 1ffff11009604f6a
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88804b027b40
FS:  00007fe35e8686c0(0000) GS:ffff8880b8403000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 0000000025f08000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3b8/0x500
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 cf 30 ef 09 e8 0a 4c 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 58 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900025fe518 EFLAGS: 00000286
RAX: e1d1cfb755b7bf00 RBX: 0000000000000000 RCX: e1d1cfb755b7bf00
RDX: 0000000000000006 RSI: ffffffff8db9e7a7 RDI: ffffffff8c03d4e0
RBP: ffffc900025fe570 R08: ffffffff8fc34277 R09: 1ffffffff1f8684e
R10: dffffc0000000000 R11: fffffbfff1f8684f R12: ffff888105ff1d00
R13: dffffc0000000000 R14: ffff8881077d5700 R15: ffff88804b03ab98
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__kmalloc_node_track_caller_noprof+0x2d0/0x800
Code: 82 a7 10 85 c0 0f 84 54 03 00 00 48 c7 44 24 20 00 00 00 00 44 8b 44 24 04 65 48 8b 05 71 82 a7 10 49 8b 4d 00 48 8b 6c 08 08 <4c> 8b 24 08 48 8b 5c 08 10 66 90 4d 85 e4 0f 84 cd 02 00 00 48 85
RSP: 0018:ffffc900025fe918 EFLAGS: 00000246
RAX: ffff8880b8403000 RBX: 0000000000000000 RCX: ffffffff92c3b4d0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e45f3a0
RBP: 000000000001de78 R08: 00000000ffffffff R09: ffffffff8217a82d
R10: ffffc900025fea40 R11: fffff520004bfd4b R12: 0000000000000000
R13: ffff88801ac41500 R14: 0000000000000cc0 R15: 0000000000000006
 kstrdup+0x42/0x100
 kobject_set_name_vargs+0x61/0x110
 dev_set_name+0xd4/0x120
 netdev_register_kobject+0xb7/0x310
 register_netdevice+0x126c/0x1ae0
 cfg80211_register_netdevice+0x150/0x2f0
 ieee80211_if_add+0xe60/0x1390
 ieee80211_register_hw+0x35a5/0x40d0
 mac80211_hwsim_new_radio+0x2f7a/0x5220
 hwsim_new_radio_nl+0xf5b/0x1bd0
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe35d98ec29
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:00007fe35e868038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe35dbd5fa0 RCX: 00007fe35d98ec29
RDX: 0000000000000084 RSI: 0000200000000100 RDI: 0000000000000004
RBP: 00007fe35da11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe35dbd6038 R14: 00007fe35dbd5fa0 R15: 00007fffb95e7418
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g12013 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=6555
rcu: rcu_preempt kthread starved for 10502 jiffies! g12013 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27272 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
