rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (2 ticks this GP) idle=949c/1/0x4000000000000000 softirq=6735/6735 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=6481, q=126 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5079 Comm: syz-executor176 Not tainted 6.8.0-rc4-syzkaller-00189-g97dde8402633 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3762 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3782 [inline]
RIP: 0010:validate_chain+0x1b1/0x58e0 kernel/locking/lockdep.c:3837
Code: 0b 90 90 90 48 b8 eb 83 b5 80 46 86 c8 61 49 0f af c6 48 c1 e8 2f 48 8d 1c c5 a0 a3 b4 92 48 89 d8 48 c1 e8 03 48 89 44 24 60 <42> 80 3c 20 00 74 08 48 89 df e8 80 c0 83 00 48 89 5c 24 40 48 8b
RSP: 0018:ffffc900001f0640 EFLAGS: 00000806
RAX: 1ffffffff25844af RBX: ffffffff92c22578 RCX: ffffffff8171c87b
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92c8a420
RBP: ffffc900001f0940 R08: ffffffff92c8a427 R09: 1ffffffff2591484
R10: dffffc0000000000 R11: fffffbfff2591485 R12: dffffc0000000000
R13: ffff888029318b58 R14: 4135954741f79c6b R15: ffff888029318000
FS:  00005555563c9380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff79c4d00f0 CR3: 000000002ab44000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137
 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x158/0x390 lib/debugobjects.c:763
 debug_hrtimer_deactivate kernel/time/hrtimer.c:427 [inline]
 debug_deactivate+0x1b/0x200 kernel/time/hrtimer.c:483
 __run_hrtimer kernel/time/hrtimer.c:1657 [inline]
 __hrtimer_run_queues+0x30f/0xd00 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x107/0x3a0 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x92/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 3e 1a 84 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 33 dd f2 f5 65 8b 05 84 4f 92 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc90003abea60 EFLAGS: 00000206
RAX: 2f2814a51ef14900 RBX: 1ffff92000757d50 RCX: ffffffff8171882a
RDX: dffffc0000000000 RSI: ffffffff8baab5e0 RDI: 0000000000000001
RBP: ffffc90003abeaf0 R08: ffffffff92c8a4e7 R09: 1ffffffff259149c
R10: dffffc0000000000 R11: fffffbfff259149d R12: dffffc0000000000
R13: 1ffff92000757d4c R14: ffffc90003abea80 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 taprio_change+0x4912/0x57d0 net/sched/sch_taprio.c:1993
 taprio_init+0x9da/0xc80 net/sched/sch_taprio.c:2134
 qdisc_create+0x9d4/0x1190 net/sched/sch_api.c:1355
 tc_modify_qdisc+0xa26/0x1e40 net/sched/sch_api.c:1776
 rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6618
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367
 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7ff79c454129
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe41f68378 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff79c454129
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007ffe41f68400 R09: 00007ffe41f68400
R10: 00007ffe41f68400 R11: 0000000000000246 R12: 0000000000000031
R13: 0000000000000047 R14: 0000000000050012 R15: 0000000000000003
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.699 msecs
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g6481 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=1971
rcu: rcu_preempt kthread starved for 10502 jiffies! g6481 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:25072 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2183
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>