rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=1e0c/1/0x4000000000000000 softirq=0/0 fqs=5124 rcuc=10499 jiffies(starved)
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5900        242          267
rcu: 	cputime:      145      52246          118   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=15809 q=5711 ncpus=2)
CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Not tainted syzkaller #0 PREEMPT_{RT,(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+0x221/0x350
Code: ff ff ff e8 f1 1d 88 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 cb a8 cf 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 18 98 ed
RSP: 0018:ffffc90000157ab0 EFLAGS: 00000282
RAX: d849faf028ade000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000c2a619e0 RSI: ffffffff8d88871f RDI: ffffffff8ba85b60
RBP: ffffffff893a4594 R08: ffffffff893a4594 R09: ffffffff8dfc8240
R10: dffffc0000000000 R11: fffffbfff1f1597f R12: 0000000000000002
R13: ffffffff8dfc8240 R14: 0000000000000000 R15: 0000000000000246
FS:  0000000000000000(0000) GS:ffff88818e91f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055921a945380 CR3: 000000000ddb6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 advance_sched+0x9c0/0xc20
 __hrtimer_run_queues+0x405/0xb10
 hrtimer_run_softirq+0x18f/0x260
 handle_softirqs+0x1de/0x6d0
 run_ktimerd+0x69/0x100
 smpboot_thread_fn+0x541/0xa50
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
