rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=b60c/1/0x4000000000000000 softirq=42164/42165 fqs=1
rcu: 	(detected by 1, t=10502 jiffies, g=35581, q=530 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13746 Comm: syz.2.2366 Not tainted 6.14.0-syzkaller-05884-g2ea396448f26 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_preemption_disabled+0x8/0x120 lib/smp_processor_id.c:13
Code: e0 ef a0 8c eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 55 41 54 <53> 48 83 ec 10 49 c7 c4 20 60 63 93 65 49 8b 04 24 48 89 44 24 08
RSP: 0018:ffffc90000007c00 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88805e465a00
RDX: ffff88805e465a00 RSI: ffffffff8e746def RDI: ffffffff8ca0f000
RBP: ffffffff93636020 R08: ffffffff8a1a6e61 R09: fffff52000000f7c
R10: dffffc0000000000 R11: fffff52000000f7c R12: ffff88805e465a00
R13: 0000000000000046 R14: 00000000ffffffff R15: ffff88805073c300
FS:  00007f9de925d6c0(0000) GS:ffff888124fea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f706d75df98 CR3: 000000004ee28000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lockdep_recursion_inc kernel/locking/lockdep.c:467 [inline]
 lock_is_held_type+0x7f/0x1a0 kernel/locking/lockdep.c:5937
 lock_is_held include/linux/lockdep.h:249 [inline]
 advance_sched+0x148/0xca0 net/sched/sch_taprio.c:927
 __run_hrtimer kernel/time/hrtimer.c:1791 [inline]
 __hrtimer_run_queues+0x5a6/0xd40 kernel/time/hrtimer.c:1855
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_unregister_key+0x29a/0x2f0 kernel/locking/lockdep.c:6610
Code: b0 1e 67 94 48 c7 c6 40 23 9f 81 e8 60 b3 09 00 e8 3b be 09 00 e9 3b fe ff ff e8 b1 ed 84 0a f7 c5 00 02 00 00 74 d2 fb 84 db <75> d1 eb e2 90 0f 0b 90 e9 35 ff ff ff 90 0f 0b 90 e9 46 ff ff ff
RSP: 0018:ffffc9000434f0a8 EFLAGS: 00000246
RAX: cfb604f537b3cb00 RBX: 0000000000000000 RCX: 00000000000200d6
RDX: ffffffff94271ea8 RSI: ffffffff8e746def RDI: ffffffff8ca0f000
RBP: 0000000000000206 R08: ffffffff820b3314 R09: 1ffffffff20bc88e
R10: dffffc0000000000 R11: fffffbfff20bc88f R12: ffffffff93636020
R13: 0000000000001000 R14: ffffffff94671ec8 R15: ffff888021f6f298
 __qdisc_destroy+0x165/0x410 net/sched/sch_generic.c:1080
 taprio_attach+0x24e/0x390 net/sched/sch_taprio.c:2147
 qdisc_graft+0x133f/0x1670 net/sched/sch_api.c:1175
 __tc_modify_qdisc net/sched/sch_api.c:1765 [inline]
 tc_modify_qdisc+0x1aa3/0x2610 net/sched/sch_api.c:1821
 rtnetlink_rcv_msg+0x7c2/0xd70 net/core/rtnetlink.c:6964
 netlink_rcv_skb+0x208/0x480 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x7f8/0x9a0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x8c3/0xcd0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:727
 ____sys_sendmsg+0x523/0x860 net/socket.c:2566
 ___sys_sendmsg net/socket.c:2620 [inline]
 __sys_sendmsg+0x271/0x360 net/socket.c:2652
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9de838d169
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:00007f9de925d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9de85a5fa0 RCX: 00007f9de838d169
RDX: 0000000000000000 RSI: 00002000000007c0 RDI: 0000000000000008
RBP: 00007f9de840e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9de85a5fa0 R15: 00007ffc07076ea8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g35581 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=13797
rcu: rcu_preempt kthread starved for 10500 jiffies! g35581 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:26976 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5366 [inline]
 __schedule+0x1b18/0x50e0 kernel/sched/core.c:6747
 __schedule_loop kernel/sched/core.c:6824 [inline]
 schedule+0x163/0x360 kernel/sched/core.c:6839
 schedule_timeout+0x15b/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>