rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=88fc/1/0x4000000000000000 softirq=0/0 fqs=5183 rcuc=10502 jiffies(starved)
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5758         87          102
rcu: 	cputime:      120      52341           21   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=21737 q=7000 ncpus=2)
CPU: 1 UID: 0 PID: 30 Comm: ktimers/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 5d 74 76 f6 f7 c3 00 02 00 00 74 05 e8 c0 2a a2 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 24 04 69 f6 65 8b 05 9d 92 44 07 85 c0 74 18 5b 41 5e e9 01 3d
RSP: 0018:ffffc90000a4fba0 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000080000001
RDX: 0000000000000002 RSI: ffffffff8d621f0c RDI: 0000000000000001
RBP: ffff8880b8728950 R08: ffffffff8f8a76f7 R09: 1ffffffff1f14ede
R10: dffffc0000000000 R11: fffffbfff1f14edf R12: ffffffff893a1f00
R13: 1ffff110170e5122 R14: ffff8880b8728540 R15: ffff88802b0b5440
FS:  0000000000000000(0000) GS:ffff88812602d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b8c6d44c0 CR3: 0000000037182000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __run_hrtimer kernel/time/hrtimer.c:1926 [inline]
 __hrtimer_run_queues+0x305/0xb10 kernel/time/hrtimer.c:1994
 hrtimer_run_softirq+0x18f/0x260 kernel/time/hrtimer.c:2011
 handle_softirqs+0x1de/0x6d0 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 run_ktimerd+0x69/0x100 kernel/softirq.c:1155
 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>