rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6082
rcu: 	(detected by 1, t=10502 jiffies, g=14017, q=830 ncpus=2)
task:syz.3.68        state:R  running task     stack:26752 pid:6082  tgid:6080  ppid:5622   task_flags:0x400140 flags:0x00080000
Call Trace:
 <IRQ>
 sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8148
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
 print_other_cpu_stall+0xfca/0x1380 kernel/rcu/tree_stall.h:681
 check_cpu_stall kernel/rcu/tree_stall.h:856 [inline]
 rcu_pending kernel/rcu/tree.c:3679 [inline]
 rcu_sched_clock_irq+0x939/0x1050 kernel/rcu/tree.c:2716
 update_process_times+0x234/0x2d0 kernel/time/timer.c:2475
 tick_sched_handle kernel/time/tick-sched.c:298 [inline]
 tick_nohz_handler+0x42b/0x770 kernel/time/tick-sched.c:319
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x3bc/0xb10 kernel/time/hrtimer.c:2096
 hrtimer_interrupt+0x455/0x950 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 4d 12 75 f6 f7 c3 00 02 00 00 74 05 e8 90 ed a0 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> a4 9f 67 f6 65 8b 05 cd ff 43 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc9000636f3a8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 0000000080000002
RDX: 0000000000000002 RSI: ffffffff8d626ff0 RDI: 0000000000000001
RBP: ffffc9000636f480 R08: ffffffff8f8acbf7 R09: 1ffffffff1f1597e
R10: dffffc0000000000 R11: fffffbfff1f1597f R12: 1ffff92000c6de81
R13: 0000000000000246 R14: ffff888063450588 R15: ffffc9000636f400
 raw_spin_unlock_irqrestore_wake include/linux/sched/wake_q.h:97 [inline]
 rtlock_slowlock kernel/locking/rtmutex.c:1920 [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:810 [inline]
 page_pool_put_unrefed_netmem+0x5cc/0xa10 net/core/page_pool.c:932
 dev_map_enqueue_multi+0xff6/0x1110 kernel/bpf/devmap.c:695
 __xdp_do_redirect_frame net/core/filter.c:4476 [inline]
 xdp_do_redirect_frame+0x4ec/0x670 net/core/filter.c:4534
 xdp_test_run_batch net/bpf/test_run.c:330 [inline]
 bpf_test_run_xdp_live+0xe34/0x1cf0 net/bpf/test_run.c:379
 bpf_prog_test_run_xdp+0x81c/0x1160 net/bpf/test_run.c:1465
 bpf_prog_test_run+0x2cd/0x340 kernel/bpf/syscall.c:4747
 __sys_bpf+0x643/0x950 kernel/bpf/syscall.c:6271
 __do_sys_bpf kernel/bpf/syscall.c:6366 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6364 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6364
 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: 0033:0x7fc604efce59
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:00007fc603135028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fc605176090 RCX: 00007fc604efce59
RDX: 0000000000000050 RSI: 0000200000000b80 RDI: 000000000000000a
RBP: 00007fc604f92d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc605176128 R14: 00007fc605176090 R15: 00007ffffeef2818
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10343 jiffies! g14017 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x1000
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=4656
rcu: rcu_preempt kthread starved for 10344 jiffies! g14017 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x1000 ->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:D stack:27000 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16f9/0x5500 kernel/sched/core.c:7197
 __schedule_loop kernel/sched/core.c:7276 [inline]
 schedule_rtlock+0x30/0x70 kernel/sched/core.c:7355
 rtlock_slowlock_locked+0x3638/0x3c80 kernel/locking/rtmutex.c:1892
 rtlock_slowlock kernel/locking/rtmutex.c:1919 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x165/0x400 kernel/locking/spinlock_rt.c:57
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 get_from_partial_node+0x54/0x480 mm/slub.c:3812
 get_from_partial mm/slub.c:3940 [inline]
 ___slab_alloc+0xc2/0x930 mm/slub.c:4455
 __slab_alloc_node mm/slub.c:4523 [inline]
 slab_alloc_node mm/slub.c:4899 [inline]
 kmem_cache_alloc_noprof+0xea/0x680 mm/slub.c:4918
 kmem_alloc_batch lib/debugobjects.c:371 [inline]
 fill_pool+0x156/0x580 lib/debugobjects.c:420
 debug_objects_fill_pool+0x97/0xd0 lib/debugobjects.c:742
 debug_object_assert_init+0x65/0x300 lib/debugobjects.c:1020
 debug_timer_assert_init kernel/time/timer.c:803 [inline]
 debug_assert_init kernel/time/timer.c:848 [inline]
 __try_to_del_timer_sync kernel/time/timer.c:1457 [inline]
 __timer_delete_sync+0x247/0x610 kernel/time/timer.c:1621
 schedule_timeout+0x160/0x2c0 kernel/time/sleep_timeout.c:100
 rcu_gp_fqs_loop+0x312/0x11b0 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: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 6b 64 02 e9 83 cc 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 43 eb 20 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8dc07dc0 EFLAGS: 00000242
RAX: 00000000000a7497 RBX: ffffffff81997aaa RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d626ff0 RDI: ffffffff8ba85b60
RBP: ffffffff8dc07eb0 R08: ffff8880b8633d1b R09: 1ffff110170c67a3
R10: dffffc0000000000 R11: ffffed10170c67a4 R12: 0000000000000000
R13: 1ffffffff1b9fdd8 R14: 0000000000000000 R15: 1ffffffff1b9fdd8
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557a6fea88 CR3: 000000003fb62000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/kernel/process.c:766 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x36a/0x5f0 kernel/sched/idle.c:352
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:451
 rest_init+0x2de/0x300 init/main.c:762
 start_kernel+0x38a/0x3e0 init/main.c:1220
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x157
 </TASK>