rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (0 ticks this GP) idle=c61c/1/0x4000000000000000 softirq=25470/25470 fqs=5250
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 52500(ms)
rcu: 	(detected by 1, t=10502 jiffies, g=18413, q=313 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8222 Comm: syz.1.677 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_release+0x20/0x3e0
Code: 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 49 89 f5 49 89 fe 65 48 8b 05 60 6b 03 11 <48> 89 44 24 28 0f 1f 44 00 00 65 8b 05 63 6b 03 11 83 f8 08 0f 83
RSP: 0018:ffffc90000007818 EFLAGS: 00000086
RAX: 21ddf72c24edef00 RBX: 0000000000000802 RCX: ffff888106fcb980
RDX: 0000000000010000 RSI: ffffffff81adad5e RDI: ffff88804b027a98
RBP: ffffc90000007918 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f00 R12: dffffc0000000000
R13: ffffffff81adad5e R14: ffff88804b027a98 R15: 1ffff92000000f10
FS:  00007f3b6feab6c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3b6feaafc8 CR3: 0000000027654000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_unlock_irqrestore+0x70/0x110
 hrtimer_try_to_cancel+0x3be/0x420
 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:__import_iovec+0x4a1/0x7f0
Code: 89 df e8 82 31 5c fd 31 c0 48 8b 4c 24 08 48 3b 0b 48 0f 44 c8 48 89 0b e9 9a 01 00 00 e8 77 0b f8 fc bd ea ff ff ff 0f 1f 00 <31> ff 89 ee e8 a6 0f f8 fc 85 ed 0f 85 df 02 00 00 4c 89 f0 48 c1
RSP: 0018:ffffc90002defa70 EFLAGS: 00000246
RAX: 1ffff920005bdf91 RBX: ffffc90002defc88 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 000000000000004c RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90002defd20 R09: ffffc90002defdf0
R10: ffffc90002defe30 R11: fffff520005bdfc8 R12: 0000200000000000
R13: ffffc90002defdf0 R14: ffffc90002defc80 R15: 00007ffffffff000
 import_iovec+0x74/0xa0
 ___sys_sendmsg+0x1e7/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3b6ef8ec29
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:00007f3b6feab038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3b6f1d5fa0 RCX: 00007f3b6ef8ec29
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000004
RBP: 00007f3b6f011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3b6f1d6038 R14: 00007f3b6f1d5fa0 R15: 00007fffcc6a8558
 </TASK>
