rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=6d3c/1/0x4000000000000000 softirq=0/0 fqs=5243 rcuc=10423 jiffies(starved)
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5703          0           25
rcu: 	cputime:      106      52392            4   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=19149 q=665 ncpus=2)
CPU: 1 UID: 0 PID: 29 Comm: ktimers/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 1b 3c 5a 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000a3f780 EFLAGS: 00000206
RAX: a86946163dd83700 RBX: 0000000000000000 RCX: a86946163dd83700
RDX: 0000000000000000 RSI: ffffffff8d21aeac RDI: ffffffff8b621680
RBP: ffffffff89180d9a R08: 0000000000000000 R09: ffffffff89180d9a
R10: dffffc0000000000 R11: ffffffff89180cd0 R12: 0000000000000000
R13: ffff88803865a480 R14: 0000000000000001 R15: 0000000000000246
FS:  0000000000000000(0000) GS:ffff8881269bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc36e91700 CR3: 0000000031168000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rt_spin_lock+0x88/0x2c0 kernel/locking/spinlock_rt.c:56
 spin_lock include/linux/spinlock_rt.h:44 [inline]
 advance_sched+0xca/0xc90 net/sched/sch_taprio.c:929
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x54f/0xd40 kernel/time/hrtimer.c:1825
 hrtimer_run_softirq+0x1a3/0x2e0 kernel/time/hrtimer.c:1842
 handle_softirqs+0x22f/0x710 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 run_ktimerd+0xcf/0x190 kernel/softirq.c:1043
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>