rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12156
rcu: 	(detected by 1, t=10502 jiffies, g=62161, q=928 ncpus=2)
task:syz.3.1517      state:R  running task     stack:26288 pid:12156 tgid:12155 ppid:5619   task_flags:0x400140 flags:0x00080000
Call Trace:
 <IRQ>
 sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8184
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
 print_other_cpu_stall+0xf7b/0x1310 kernel/rcu/tree_stall.h:680
 check_cpu_stall kernel/rcu/tree_stall.h:855 [inline]
 rcu_pending kernel/rcu/tree.c:3708 [inline]
 rcu_sched_clock_irq+0x93d/0x1050 kernel/rcu/tree.c:2744
 update_process_times+0x234/0x2d0 kernel/time/timer.c:2475
 tick_sched_handle kernel/time/tick-sched.c:296 [inline]
 tick_nohz_handler+0x38f/0x6b0 kernel/time/tick-sched.c:317
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x3a0/0xaf0 kernel/time/hrtimer.c:2096
 hrtimer_interrupt+0x44a/0x900 kernel/time/hrtimer.c:2215
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
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 1d c5 6d f6 f7 c3 00 02 00 00 74 05 e8 40 c6 99 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> 34 e4 5f f6 65 8b 05 2d 2e 41 07 85 c0 74 18 5b 41 5e e9 51 3c
RSP: 0018:ffffc90007fcf548 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 0000000080000002
RDX: 0000000000000002 RSI: ffffffff8d65601e RDI: 0000000000000001
RBP: ffffc90007fcf608 R08: ffffffff8f8c6df7 R09: 1ffffffff1f18dbe
R10: dffffc0000000000 R11: fffffbfff1f18dbf R12: 1ffff92000ff9eb5
R13: 0000000000000246 R14: ffff888033c6c588 R15: ffffc90007fcf5a0
 raw_spin_unlock_irqrestore_wake include/linux/sched/wake_q.h:97 [inline]
 rtlock_slowlock kernel/locking/rtmutex.c:1923 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x17a/0x400 kernel/locking/spinlock_rt.c:57
 page_pool_producer_lock include/linux/bottom_half.h:-1 [inline]
 page_pool_recycle_in_ring net/core/page_pool.c:788 [inline]
 page_pool_put_unrefed_netmem+0x5d3/0xa30 net/core/page_pool.c:910
 xdp_test_run_batch net/bpf/test_run.c:340 [inline]
 bpf_test_run_xdp_live+0xd31/0x1c20 net/bpf/test_run.c:378
 bpf_prog_test_run_xdp+0x7d8/0x11d0 net/bpf/test_run.c:1467
 bpf_prog_test_run+0x2cb/0x340 kernel/bpf/syscall.c:4859
 __sys_bpf+0xa22/0xd90 kernel/bpf/syscall.c:6436
 __do_sys_bpf kernel/bpf/syscall.c:6537 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6534 [inline]
 __x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6534
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f22a3f5ce59
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:00007f22a21b6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f22a41d5fa0 RCX: 00007f22a3f5ce59
RDX: 0000000000000050 RSI: 0000200000000040 RDI: 000000000000000a
RBP: 00007f22a3ff2e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22a41d6038 R14: 00007f22a41d5fa0 R15: 00007fffb84a4018
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10450 jiffies! g62161 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=40437
rcu: rcu_preempt kthread starved for 10451 jiffies! g62161 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:27784 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1709/0x5530 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11c0 kernel/rcu/tree.c:2123
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
 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:
CPU: 1 UID: 0 PID: 12156 Comm: syz.3.1517 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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 1d c5 6d f6 f7 c3 00 02 00 00 74 05 e8 40 c6 99 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> 34 e4 5f f6 65 8b 05 2d 2e 41 07 85 c0 74 18 5b 41 5e e9 51 3c
RSP: 0018:ffffc90007fcf548 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 0000000080000002
RDX: 0000000000000002 RSI: ffffffff8d65601e RDI: 0000000000000001
RBP: ffffc90007fcf608 R08: ffffffff8f8c6df7 R09: 1ffffffff1f18dbe
R10: dffffc0000000000 R11: fffffbfff1f18dbf R12: 1ffff92000ff9eb5
R13: 0000000000000246 R14: ffff888033c6c588 R15: ffffc90007fcf5a0
FS:  00007f22a21b66c0(0000) GS:ffff888125fd4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34523ffc CR3: 0000000011606000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 raw_spin_unlock_irqrestore_wake include/linux/sched/wake_q.h:97 [inline]
 rtlock_slowlock kernel/locking/rtmutex.c:1923 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x17a/0x400 kernel/locking/spinlock_rt.c:57
 page_pool_producer_lock include/linux/bottom_half.h:-1 [inline]
 page_pool_recycle_in_ring net/core/page_pool.c:788 [inline]
 page_pool_put_unrefed_netmem+0x5d3/0xa30 net/core/page_pool.c:910
 xdp_test_run_batch net/bpf/test_run.c:340 [inline]
 bpf_test_run_xdp_live+0xd31/0x1c20 net/bpf/test_run.c:378
 bpf_prog_test_run_xdp+0x7d8/0x11d0 net/bpf/test_run.c:1467
 bpf_prog_test_run+0x2cb/0x340 kernel/bpf/syscall.c:4859
 __sys_bpf+0xa22/0xd90 kernel/bpf/syscall.c:6436
 __do_sys_bpf kernel/bpf/syscall.c:6537 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6534 [inline]
 __x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6534
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f22a3f5ce59
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:00007f22a21b6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f22a41d5fa0 RCX: 00007f22a3f5ce59
RDX: 0000000000000050 RSI: 0000200000000040 RDI: 000000000000000a
RBP: 00007f22a3ff2e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22a41d6038 R14: 00007f22a41d5fa0 R15: 00007fffb84a4018
 </TASK>