rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P25366/1:b..l rcu: (detected by 1, t=10503 jiffies, g=125169, q=987776 ncpus=2) task:syz.8.3594 state:R running task stack:26536 pid:25366 tgid:25365 ppid:22661 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5295 [inline] __schedule+0xfee/0x6120 kernel/sched/core.c:6908 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7235 irqentry_exit+0x17b/0x670 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:its_return_thunk+0x0/0x10 arch/x86/lib/retpoline.S:417 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 e9 eb fe e2 f5 cc RSP: 0018:ffffc9000e3b7a68 EFLAGS: 00000297 RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffff89a38eb7 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88802db34980 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802db34e40 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 bpf_prog_test_run_sk_lookup+0x9b7/0x1300 net/bpf/test_run.c:1586 bpf_prog_test_run kernel/bpf/syscall.c:4722 [inline] __sys_bpf+0x1725/0x4b90 kernel/bpf/syscall.c:6246 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x7b/0xc0 kernel/bpf/syscall.c:6339 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb457b9c799 RSP: 002b:00007fb458b05028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb457e15fa0 RCX: 00007fb457b9c799 RDX: 0000000000000048 RSI: 0000200000000440 RDI: 000000000000000a RBP: 00007fb457c32bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb457e16038 R14: 00007fb457e15fa0 R15: 00007ffdb52192c8