rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 ticks this GP) idle=640c/1/0x4000000000000000 softirq=14407/14419 fqs=2
rcu: 	(detected by 1, t=10502 jiffies, g=10021, q=2114 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6603 Comm: syz.4.200 Not tainted 6.13.0-rc6-syzkaller-00127-g8c7a6efc017e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rb_erase+0xe5a/0xe70 lib/rbtree.c:446
Code: 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 42 d1 41 f6 4c 89 2b 48 83 c4 28 5b 41 5c 41 5d <41> 5e 41 5f 5d c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000092
RAX: 1ffff110170c593a RBX: ffff8880b862c9d8 RCX: dffffc0000000000
RDX: 0000000000010000 RSI: ffff8880b862c9d0 RDI: ffff888061c58348
RBP: 0000000000000000 R08: ffffffff8bc49b38 R09: 1ffffffff2033046
R10: dffffc0000000000 R11: fffffbfff2033047 R12: 1ffff1100c38b068
R13: ffff888061c58340 R14: 0000000000000001 R15: ffff8880b862c9d0
FS:  00007ff5fd49c6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc388f2018 CR3: 00000000295ca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rb_erase_cached include/linux/rbtree.h:126 [inline]
 timerqueue_del+0xac/0x100 lib/timerqueue.c:57
 __remove_hrtimer kernel/time/hrtimer.c:1109 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1719 [inline]
 __hrtimer_run_queues+0x3d0/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 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+0x56d/0x610 kernel/locking/lockdep.c:6593
Code: 25 94 48 c7 c6 c0 15 7b 81 e8 2f 26 0a 00 e8 9a 3a 0a 00 e9 e5 fb ff ff e8 00 d6 4d 0a 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 90 0f 0b 90 45 31 f6 e9 62 ff ff ff 90 0f 0b 90 e9 a1
RSP: 0018:ffffc9000b91f0a0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92001723e1c RCX: ffffffff9a3ac903
RDX: 0000000000000001 RSI: ffffffff8c0aa620 RDI: ffffffff8c5fb0a0
RBP: ffffc9000b91f168 R08: ffffffff9427683f R09: 1ffffffff284ed07
R10: dffffc0000000000 R11: fffffbfff284ed08 R12: ffffc9000b91f0e0
R13: 1ffff92001723e18 R14: 0000000000000000 R15: 0000000000000206
 __qdisc_destroy+0x165/0x410 net/sched/sch_generic.c:1085
 taprio_attach+0x24e/0x390 net/sched/sch_taprio.c:2149
 qdisc_graft+0x133c/0x1660 net/sched/sch_api.c:1175
 tc_modify_qdisc+0xf47/0x1e40 net/sched/sch_api.c:1793
 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6931
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583
 ___sys_sendmsg net/socket.c:2637 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff5fc585d29
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:00007ff5fd49c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff5fc775fa0 RCX: 00007ff5fc585d29
RDX: 0000000000000010 RSI: 00000000200007c0 RDI: 0000000000000006
RBP: 00007ff5fc601b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff5fc775fa0 R15: 00007ffd0ecec388
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10497 jiffies! g10021 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=3153
rcu: rcu_preempt kthread starved for 10498 jiffies! g10021 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:25784 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>