rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=6a6c/1/0x4000000000000000 softirq=15316/15316 fqs=0
rcu: 	(detected by 1, t=10505 jiffies, g=12381, q=235 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6082 Comm: syz-executor.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:146 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:153 [inline]
RIP: 0010:lock_release+0x29a/0x3e0 kernel/locking/lockdep.c:5892
Code: c7 51 4b 6f 8d e8 96 54 98 09 b8 ff ff ff ff 65 0f c1 05 e9 6c ad 10 83 f8 01 75 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 <f7> 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b
RSP: 0018:ffffc90000007bf8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000006 RCX: de2531f1a7f33b00
RDX: 0000000000000001 RSI: ffffffff8d6f4b51 RDI: ffffffff8b9ee960
RBP: ffff8880256e8b58 R08: ffff88802032f487 R09: 1ffff11004065e90
R10: dffffc0000000000 R11: ffffed1004065e91 R12: 0000000000000001
R13: 0000000000000001 R14: ffff88807ecc1300 R15: ffff8880256e8000
FS:  00007ff6e0e7e6c0(0000) GS:ffff88812638a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6e0e7ed58 CR3: 000000001bf6f000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x99f/0xc90 net/sched/sch_taprio.c:986
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 eb 32 8f f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 53 bd 57 f6 65 8b 05 3c 5d 12 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900048379e0 EFLAGS: 00000206
RAX: de2531f1a7f33b00 RBX: 0000000000000216 RCX: de2531f1a7f33b00
RDX: 0000000000000007 RSI: ffffffff8d51242c RDI: 0000000000000001
RBP: ffffc90004837a70 R08: ffffffff8f5be737 R09: 1ffffffff1eb7ce6
R10: dffffc0000000000 R11: fffffbfff1eb7ce7 R12: dffffc0000000000
R13: ffff8880b8827ac0 R14: ffff8880b8827ac0 R15: 1ffff92000906f3c
 clock_was_set+0x63b/0x7c0 kernel/time/hrtimer.c:965
 do_adjtimex+0x8f0/0xb20 kernel/time/timekeeping.c:2753
 do_clock_adjtime kernel/time/posix-timers.c:1161 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1173 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1164 [inline]
 __x64_sys_clock_adjtime+0x1f7/0x2b0 kernel/time/posix-timers.c:1164
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff6e007cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff6e0e7e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007ff6e019c050 RCX: 00007ff6e007cae9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007ff6e00c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff6e019c050 R15: 00007ffddd5aa718
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g12381 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=6263
rcu: rcu_preempt kthread starved for 10505 jiffies! g12381 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:27256 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 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>