rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7045
rcu: 	(detected by 0, t=10502 jiffies, g=18885, q=894 ncpus=2)
task:syz.2.403       state:R  running task     stack:26592 pid:7045  tgid:7044  ppid:5610   task_flags:0x400140 flags:0x00080000
Call Trace:
 <IRQ>
 sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8139
 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:1930 [inline]
 __hrtimer_run_queues+0x3bc/0xb10 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x455/0x950 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:__sanitizer_cov_trace_pc+0x0/0x80 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d 64 29 c8 0b 48 89 de 5b e9 63 55 5e 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 48 99 aa 10 65 8b 35 69 99 aa
RSP: 0018:ffffc9000732f6c0 EFLAGS: 00000206
RAX: 1ffffffff1b185e2 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90006e41000 RSI: 000000000007ffff RDI: 0000000000040a2e
RBP: ffffc9000732fb50 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f14dff R12: ffff888040a2e038
R13: dffffc0000000000 R14: 0000000000040a2e R15: 0000000001028b80
 pfn_valid+0x12/0x4c0 include/linux/mmzone.h:2265
 xdp_test_run_batch net/bpf/test_run.c:301 [inline]
 bpf_test_run_xdp_live+0x74e/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: 0033:0x7f62720ccdd9
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:00007f627031e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f6272345fa0 RCX: 00007f62720ccdd9
RDX: 0000000000000050 RSI: 0000200000000b80 RDI: 000000000000000a
RBP: 00007f6272162d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6272346038 R14: 00007f6272345fa0 R15: 00007ffda5b31de8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10450 jiffies! g18885 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=9660
rcu: rcu_preempt kthread starved for 10451 jiffies! g18885 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:27520 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5387 [inline]
 __schedule+0x169e/0x54f0 kernel/sched/core.c:7188
 __schedule_loop kernel/sched/core.c:7267 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7282
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 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:
CPU: 0 UID: 0 PID: 7045 Comm: syz.2.403 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x80 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d 64 29 c8 0b 48 89 de 5b e9 63 55 5e 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 48 99 aa 10 65 8b 35 69 99 aa
RSP: 0018:ffffc9000732f6c0 EFLAGS: 00000206
RAX: 1ffffffff1b185e2 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90006e41000 RSI: 000000000007ffff RDI: 0000000000040a2e
RBP: ffffc9000732fb50 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f14dff R12: ffff888040a2e038
R13: dffffc0000000000 R14: 0000000000040a2e R15: 0000000001028b80
FS:  00007f627031e6c0(0000) GS:ffff888125f2d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fec5b784000 CR3: 0000000034404000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 pfn_valid+0x12/0x4c0 include/linux/mmzone.h:2265
 xdp_test_run_batch net/bpf/test_run.c:301 [inline]
 bpf_test_run_xdp_live+0x74e/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: 0033:0x7f62720ccdd9
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:00007f627031e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f6272345fa0 RCX: 00007f62720ccdd9
RDX: 0000000000000050 RSI: 0000200000000b80 RDI: 000000000000000a
RBP: 00007f6272162d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6272346038 R14: 00007f6272345fa0 R15: 00007ffda5b31de8
 </TASK>