There should be a NULL pointer check about the internal_config.hugefile_prefix

https://bugs.dpdk.org/show_bug.cgi?id=108

            Bug ID: 108
           Summary: There should be a NULL pointer check about the
                    internal_config.hugefile_prefix
           Product: DPDK
           Version: 17.11
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: [email protected]
          Reporter: [email protected]

Target Milestone: ---

In the function "eal_parse_args",

    case OPT_FILE_PREFIX_NUM:
                        internal_config.hugefile_prefix = strdup(optarg);
                        break;

If the strdup(optarg) return NULL,there will be a segment fault in function "eal_check_common_options".

The index will get a NULL pointer and crash:

    if (index(internal_cfg->hugefile_prefix, '%') != NULL)

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