case SILC_PARAM_UI32_STRING_ALLOC:
{
unsigned char *x = va_arg(ap, unsigned char *);
- SilcUInt32 tmp_len = strlen(x);
- FORMAT_HAS_SPACE(stack, dst, tmp_len);
- silc_buffer_put(dst, x, tmp_len);
- silc_buffer_pull(dst, tmp_len);
+ SilcUInt32 tmp_len = x ? strlen(x) : 0;
+ if (x && tmp_len) {
+ FORMAT_HAS_SPACE(stack, dst, tmp_len);
+ silc_buffer_put(dst, x, tmp_len);
+ silc_buffer_pull(dst, tmp_len);
+ }
break;
}
case SILC_PARAM_UI8_NSTRING: