loop in eBPF kernel program

[Tushar Dave <tushar.n.dave@xxxxxxxxxx>]

Hello,

I am writing sample eBPF kernel program that uses kprobe
e.g.
SEC("kprobe/xyz")
int bpf_prog1(struct pt_regs *ctx)
{
.
..
}

And with pt_regs context I retrieved pointer to 'struct sk_buff_head'.
From here on, I want to iterate over all skbs in the skb queue and
print/gather packet data. This certainly involves loop and that causes
my ebpf kernel program to fail with error,
e.g.
bpf_load_program() err=22
back-edge from insn 51 to 39
back-edge from insn 51 to 39


Any other alternative so that I can retrieve all packet data from skb queue?

Apology as this is not pure xdp query but I feel it should be okay to
ask here.

Thanks.

-Tushar