rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10277
rcu: 	(detected by 1, t=10502 jiffies, g=40385, q=2226 ncpus=2)
task:syz.5.1848      state:R  running task     stack:25720 pid:10277 tgid:10273 ppid:6760   task_flags:0x400140 flags:0x00080000
Call Trace:
 <IRQ>
 sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8181
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
 print_other_cpu_stall+0xfbf/0x1350 kernel/rcu/tree_stall.h:683
 check_cpu_stall kernel/rcu/tree_stall.h:860 [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:2089
 hrtimer_interrupt+0x44a/0x900 kernel/time/hrtimer.c:2208
 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:pfn_valid+0x19f/0x4c0 include/linux/mmzone.h:2267
Code: b4 67 f8 4d 85 ff 74 ef 4d 89 fc 49 c1 ec 03 43 80 3c 2c 00 74 08 4c 89 ff e8 ad a0 d3 f8 49 8b 2f 48 89 ee 48 83 e6 02 31 ff <e8> 6c b9 67 f8 48 83 e5 02 75 6c e8 01 b4 67 f8 e8 bc 13 e6 01 89
RSP: 0018:ffffc9000ef57648 EFLAGS: 00000246
RAX: ffffffff895d66a7 RBX: ffffffff895d6665 RCX: 0000000000080000
RDX: ffffc9001be42000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffea000000000f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3900 R12: 1ffff11027fdc81c
R13: dffffc0000000000 R14: 000000000003f405 R15: ffff88813fee40e0
 xdp_test_run_batch net/bpf/test_run.c:300 [inline]
 bpf_test_run_xdp_live+0x74c/0x1c20 net/bpf/test_run.c:378
 bpf_prog_test_run_xdp+0x7d8/0x11d0 net/bpf/test_run.c:1463
 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: 0033:0x7ff3be33de59
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:00007ff3bc596028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff3be5c5fa0 RCX: 00007ff3be33de59
RDX: 0000000000000050 RSI: 0000200000000b80 RDI: 000000000000000a
RBP: 00007ff3be3d3e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff3be5c6038 R14: 00007ff3be5c5fa0 R15: 00007ffc43f2c248
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10445 jiffies! g40385 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=21519
rcu: rcu_preempt kthread starved for 10446 jiffies! g40385 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: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:7231
 __schedule_loop kernel/sched/core.c:7308 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7323
 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:
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 05/09/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: eb 6f 02 c3 cc cc cc cc 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 33 0d 26 00 fb f4 <e9> cc cf 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8de07ca0 EFLAGS: 00000246
RAX: 00000000000c6099 RBX: ffffffff8199406c RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d880d11 RDI: ffffffff8bca6e80
RBP: ffffffff8de07d78 R08: ffff8880b8633d5b R09: 1ffff110170c67ab
R10: dffffc0000000000 R11: ffffed10170c67ac R12: 0000000000000000
R13: 1ffffffff1bdedf0 R14: 1ffffffff1bc0f9c R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125c4d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcc2fb7c20 CR3: 000000004205a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/kernel/process.c:767 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:768
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x1cc/0x540 kernel/sched/idle.c:355
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
 rest_init+0x378/0x3a0 init/main.c:727
 start_kernel+0x392/0x3e0 init/main.c:1185
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x157
 </TASK>