[Bug 1753470] Re: Postconf segfaults every 5 minutes

[Andreas Hasenack]

The crash happens in vstream_fileno(fp), because fp is a null pointer:

        if ((fp = vstream_fopen(cf_file, O_RDONLY, 0)) == 0
            && errno != EACCES) {
            msg_warn("open \"%s\" configuration \"%s\": %m",
                     dp->db_type, cf_file);
            myfree(dict_spec);
            return;
        }
        if (fstat(vstream_fileno(fp), &st) == 0 && !S_ISREG(st.st_mode)) {
            msg_warn("open \"%s\" configuration \"%s\": not a regular file",
                     dp->db_type, cf_file);
            myfree(dict_spec);
            (void) vstream_fclose(fp);
            return;
        }

vstream_fopen() did return 0 and errno was set to EACCES, I don't know
why that check is excluding the permission problem. I emailed upstream
(couldn't find a bugtracker for it).

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Title:
  Postconf segfaults every 5 minutes

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