rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=6a04/1/0x4000000000000000 softirq=65066/65066 fqs=0
rcu: 	(detected by 1, t=10505 jiffies, g=53733, q=294 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13698 Comm: syz.4.1979 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+0x12/0x420
Code: 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 41 57 41 56 41 55 41 54 53 48 83 ec 30 <48> 89 fb 49 be 00 00 00 00 00 fc ff df e8 7c 1b 12 00 48 8d 4b 38
RSP: 0018:ffffc90000007928 EFLAGS: 00000086
RAX: ffffffff81adabe1 RBX: ffff888119d86ba8 RCX: ffff88810a2c1cc0
RDX: 0000000000010000 RSI: 0000000000000004 RDI: ffff888119d86ba8
RBP: 00000000ffffffff R08: ffff88804b027a83 R09: 1ffff11009604f50
R10: dffffc0000000000 R11: ffffed1009604f51 R12: ffff888119d86c50
R13: dffffc0000000000 R14: ffff888119d86ba8 R15: ffffffffffff34a9
FS:  00007f33cad836c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001b40 CR3: 0000000049c14000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __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:netdev_name_node_lookup+0xd3/0x120
Code: f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 13 ea c1 f8 49 8b 3f 48 89 de e8 38 f7 14 02 85 c0 74 0e e8 0f 6c 5e f8 eb b2 <e8> 08 6c 5e f8 eb 05 e8 01 6c 5e f8 4c 89 f0 5b 41 5c 41 5e 41 5f
RSP: 0018:ffffc90006bb7cb8 EFLAGS: 00000246
RAX: 1ffff110043afe6a RBX: ffffc90006bb7e00 RCX: 0000000000080000
RDX: ffffc90024274000 RSI: 00000000000027ba RDI: 00000000000027bb
RBP: 00000000a5f5bcd9 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: dffffc0000000000
R13: ffffc90006bb7e50 R14: 0000000000000000 R15: ffff888114b6a740
 __dev_get_by_name+0x1d/0x70
 dev_ifsioc+0x29/0xf00
 dev_ioctl+0x84c/0x1150
 sock_ioctl+0x719/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33c9f8eba9
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:00007f33cad83038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f33ca1d5fa0 RCX: 00007f33c9f8eba9
RDX: 0000200000000080 RSI: 00000000000089f2 RDI: 0000000000000007
RBP: 00007f33ca011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33ca1d6038 R14: 00007f33ca1d5fa0 R15: 00007ffce047dbe8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g53733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=27421
rcu: rcu_preempt kthread starved for 10505 jiffies! g53733 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:26632 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
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+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
