rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 ticks this GP) idle=6f94/1/0x4000000000000000 softirq=56716/56716 fqs=0
rcu: 	(detected by 1, t=10506 jiffies, g=51677, q=156 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14312 Comm: syz.1.2891 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:advance_sched+0x14f/0xc90 net/sched/sch_taprio.c:932
Code: 3c 01 00 74 08 48 89 df e8 1e a7 c5 f8 48 89 9c 24 88 00 00 00 4c 8b 3b e8 5e 6a e6 01 89 c3 31 ff 89 c6 e8 83 e9 5f f8 85 db <74> 29 49 8d 7c 24 c0 be ff ff ff ff e8 50 66 e6 01 89 c3 31 ff 89
RSP: 0018:ffffc90000007c70 EFLAGS: 00000002
RAX: ffffffff89601e7d RBX: 0000000000000001 RCX: 0000000000010000
RDX: ffff88804526dac0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f7c R12: ffff88807c0d3340
R13: ffff88807c0d3000 R14: dffffc0000000000 R15: ffff88804ec1f400
FS:  00005555935a6500(0000) GS:ffff88812613b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 000000007e001000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __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:697
RIP: 0010:__free_object+0x50a/0x6d0 lib/debugobjects.c:524
Code: b0 34 fd 48 c7 44 24 60 00 00 00 00 9c 8f 44 24 60 f6 44 24 61 02 75 53 f7 c3 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <48> 8b 44 24 38 4a c7 04 28 00 00 00 00 66 42 c7 44 28 09 00 00 42
RSP: 0018:ffffc9000b807a60 EFLAGS: 00000206
RAX: 7c5d29c816191900 RBX: 0000000000000212 RCX: 7c5d29c816191900
RDX: 0000000000000000 RSI: ffffffff8d70e43a RDI: ffffffff8bbf08e0
RBP: ffffc9000b807b50 R08: ffffffff8f7cee77 R09: 1ffffffff1ef9dce
R10: dffffc0000000000 R11: fffffbfff1ef9dcf R12: ffff8880b883ba48
R13: dffffc0000000000 R14: ffff8880b883ba40 R15: 1ffff11017107749
 free_object lib/debugobjects.c:532 [inline]
 debug_object_free+0x2a2/0x340 lib/debugobjects.c:976
 futex_wait+0x120/0x360 kernel/futex/waitwake.c:722
 do_futex+0x333/0x420 kernel/futex/syscalls.c:130
 __do_sys_futex kernel/futex/syscalls.c:207 [inline]
 __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:188
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f97ddb8f749
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:00007ffed1955cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000005b2a1 RCX: 00007f97ddb8f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f97ddde5fac
RBP: 0000000000000032 R08: 3fffffffffffffff R09: 00000002d1955fef
R10: 00007ffed1955df0 R11: 0000000000000246 R12: 00007f97ddde5fac
R13: 00007ffed1955df0 R14: 000000000005b2d3 R15: 00007ffed1955e10
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g51677 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=28018
rcu: rcu_preempt kthread starved for 10506 jiffies! g51677 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:27288 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+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>