rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8839/1:b..l rcu: (detected by 0, t=10503 jiffies, g=28213, q=2580 ncpus=2) task:syz.0.868 state:R running task stack:23464 pid:8839 ppid:5771 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1553/0x45a0 kernel/sched/core.c:6700 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline] RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413 Code: 8a e8 c2 d5 33 09 65 66 8b 05 1a 50 b1 7e 66 85 c0 75 54 bf 01 00 00 00 e8 7b 22 0a 00 e8 06 2e 3b 00 fb 65 8b 05 e6 4f b1 7e <85> c0 75 05 e8 65 37 ae ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00 RSP: 0018:ffffc9000c617a20 EFLAGS: 00000282 RAX: 0000000080000000 RBX: 0000000000000200 RCX: 8edfcc484a426300 RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: ffffffff8b1c8de0 RBP: ffffc9000c617ab0 R08: ffffffff8e8b0c2f R09: 1ffffffff1d16185 R10: dffffc0000000000 R11: fffffbfff1d16186 R12: ffffffff88b5ab34 R13: ffffc9000c617d00 R14: dffffc0000000000 R15: 1ffff920018c2f44 local_bh_enable include/linux/bottom_half.h:33 [inline] bpf_test_run+0x3dd/0x870 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0xad2/0x12b0 net/bpf/test_run.c:1058 bpf_prog_test_run+0x321/0x390 kernel/bpf/syscall.c:4132 __sys_bpf+0x49d/0x890 kernel/bpf/syscall.c:5495 __do_sys_bpf kernel/bpf/syscall.c:5581 [inline] __se_sys_bpf kernel/bpf/syscall.c:5579 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f941a59c819 RSP: 002b:00007f941b3b0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f941a815fa0 RCX: 00007f941a59c819 RDX: 0000000000000050 RSI: 0000200000000900 RDI: 000000000000000a RBP: 00007f941a632c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f941a816038 R14: 00007f941a815fa0 R15: 00007ffe88791c08