I had wrote a ebpf prog, which include a simple while loop, but when i run it, it reports bpf verify log as title described. But I could not find what the reason of occurring large loop, end up to exceed the max ebpf insns.

 while (i < MAX_BUF_LEN )
    {    
        if (*fmt == '\0')
            break;  
        if (*fmt == 'h') {
            fmt++;
            i++;
            continue;
        }
            
        i++;
        *msg++ = *fmt++;
    }

which fmt and msg is type of char *, MAX_BUF_LEN is constant number. clang version 12.0.1 kernel version:5.10 libbpf version: 1.4.1