rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 GPs behind) idle=920c/1/0x4000000000000000 softirq=21668/21669 fqs=1
rcu: 	(detected by 1, t=10502 jiffies, g=16325, q=164 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6714 Comm: syz.1.16 Not tainted 6.12.0-rc7-syzkaller-00040-g14b6320953a3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0x62a/0x8070 kernel/locking/lockdep.c:5152
Code: 0e 4a 18 00 0f 84 0a 06 00 00 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 99 60 00 00 44 0f b6 33 <48> 8b 44 24 20 0f b6 04 10 84 c0 0f 85 a8 60 00 00 41 8b 5d 00 81
RSP: 0018:ffffc90000007820 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff93411214 RCX: ffffffff816fda63
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff93a97800
RBP: ffffc90000007ae8 R08: ffffffff93a97807 R09: 1ffffffff2752f00
R10: dffffc0000000000 R11: fffffbfff2752f01 R12: ffff88802f6128d8
R13: ffff88802f612928 R14: 0000000000000002 R15: 0000000000000022
FS:  00007f529eab16c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc4ae01c8c CR3: 0000000072590000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1e9/0x540 kernel/locking/lockdep.c:5825
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 advance_sched+0xa1a/0xc90 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x597/0xd30 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10c/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_unregister_key+0x567/0x600 kernel/locking/lockdep.c:6569
Code: a4 93 48 c7 c6 00 84 70 81 e8 05 ea 09 00 e8 50 fe 09 00 e9 e5 fb ff ff e8 f6 59 ec 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
RSP: 0018:ffffc90002fbf0e0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff920005f7e24 RCX: ffffffff99b9e903
RDX: 0000000000000001 RSI: ffffffff8baad360 RDI: ffffffff8bfc95a0
RBP: ffffc90002fbf1a8 R08: ffffffff93a6854f R09: 1ffffffff274d0a9
R10: dffffc0000000000 R11: fffffbfff274d0aa R12: ffffc90002fbf120
R13: 1ffff920005f7e20 R14: 0000000000000000 R15: 0000000000000203
 __qdisc_destroy+0x165/0x400 net/sched/sch_generic.c:1085
 taprio_attach+0x24a/0x390 net/sched/sch_taprio.c:2149
 qdisc_graft+0x1336/0x1660 net/sched/sch_api.c:1175
 tc_modify_qdisc+0xf41/0x1e30 net/sched/sch_api.c:1793
 rtnetlink_rcv_msg+0x73b/0xcf0 net/core/rtnetlink.c:6675
 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f2/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8d9/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 ____sys_sendmsg+0x526/0x7d0 net/socket.c:2607
 ___sys_sendmsg net/socket.c:2661 [inline]
 __sys_sendmsg+0x28e/0x380 net/socket.c:2690
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x7e/0x180 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f529dd7e719
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:00007f529eab1038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f529df35f80 RCX: 00007f529dd7e719
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00007f529ddf139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f529df35f80 R15: 00007ffd0ca92138
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g16325 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=7237
rcu: rcu_preempt kthread starved for 10500 jiffies! g16325 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:26192 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x184b/0x4bd0 kernel/sched/core.c:6693
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0x147/0x320 kernel/sched/core.c:6785
 schedule_timeout+0x1ba/0x310 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x2db/0x1320 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2ec/0x380 kernel/kthread.c:389
 ret_from_fork+0x47/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>