rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6526/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=15173, q=6818 ncpus=2)
task:syz.2.151       state:R  running task     stack:24464 pid:6526  tgid:6525  ppid:5839   task_flags:0x400140 flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7113
 preempt_schedule+0xae/0xc0 kernel/sched/core.c:7137
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __local_bh_enable_ip+0x13e/0x1c0 kernel/softirq.c:457
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 bpf_test_run+0x376/0x7b0 net/bpf/test_run.c:437
 bpf_prog_test_run_skb+0xb4e/0x1550 net/bpf/test_run.c:1102
 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4673
 __sys_bpf+0x562/0x860 kernel/bpf/syscall.c:6152
 __do_sys_bpf kernel/bpf/syscall.c:6244 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6242 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6242
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4b25f8eec9
RSP: 002b:00007f4b26e27038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f4b261e5fa0 RCX: 00007f4b25f8eec9
RDX: 000000000000002c RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f4b26011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b261e6038 R14: 00007f4b261e5fa0 R15: 00007ffdbadbf228
 </TASK>
sched: DL replenish lagged too much