rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10506 jiffies, g=28077, q=537 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10506 (4294962487-4294951981), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10506 jiffies! g28077 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27640 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x17b4/0x5680 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7283
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8248 Comm: syz.0.737 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__this_cpu_preempt_check+0x0/0x20 lib/smp_processor_id.c:63
Code: ae 28 8c e8 82 cc 7d f5 e8 bd 0d 89 f5 eb aa 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 <f3> 0f 1e fa 48 89 fe 48 c7 c7 e0 ad 28 8c e9 fd fe ff ff cc cc cc
RSP: 0018:ffffc90000007d20 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000000 RCX: b8707686c29149c1
RDX: 0000000028290900 RSI: 00000000150b02d8 RDI: ffffffff8e21f6b9
RBP: ffffffff81b286fa R08: ffffffff81b286fa R09: ffff8880b8628298
R10: dffffc0000000000 R11: fffffbfff2061bdf R12: 0000000000000000
R13: ffff8880b8628298 R14: 0000000000000001 R15: 0000000000000046
FS:  00007fea460246c0(0000) GS:ffff888125286000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea451ea540 CR3: 0000000058e9c000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline]
 lock_acquire+0x116/0x350 kernel/locking/lockdep.c:5870
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock_irq+0x3d/0x50 kernel/locking/spinlock.c:174
 __run_hrtimer kernel/time/hrtimer.c:1934 [inline]
 __hrtimer_run_queues+0x46a/0xa20 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 ad e5 f5 f5 f7 c3 00 02 00 00 74 05 e8 b0 7b 21 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 24 68 e7 f5 65 8b 05 ed 30 8d 07 85 c0 74 18 5b 41 5e e9 51 48
RSP: 0018:ffffc9000d9ceee8 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000282 RCX: 0000000000000202
RDX: 0000000000000002 RSI: ffffffff8dfaaebb RDI: 0000000000000001
RBP: ffffc9000d9cf1d0 R08: ffffffff9030def7 R09: 1ffffffff2061bde
R10: dffffc0000000000 R11: fffffbfff2061bdf R12: ffff88805f2922a8
R13: dffffc0000000000 R14: ffff88805f2922a8 R15: ffff88805f2922f8
 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
 taprio_change+0x34da/0x45a0 net/sched/sch_taprio.c:1989
 taprio_init+0x96f/0xbe0 net/sched/sch_taprio.c:2128
 qdisc_create+0x7c4/0xf20 net/sched/sch_api.c:1323
 __tc_modify_qdisc net/sched/sch_api.c:1757 [inline]
 tc_modify_qdisc+0x16f0/0x2290 net/sched/sch_api.c:1821
 rtnetlink_rcv_msg+0x77e/0xbe0 net/core/rtnetlink.c:7018
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1895
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea4519ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fea46024028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fea45416090 RCX: 00007fea4519ce59
RDX: 0000000000008010 RSI: 00002000000012c0 RDI: 0000000000000006
RBP: 00007fea45232d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea45416128 R14: 00007fea45416090 R15: 00007ffc34a02458
 </TASK>