#7019: A memory leak bug detected in file /libavcodec/ass_split.c
-------------------------------------+-------------------------------------
             Reporter:  fangang190   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avcodec      |                  Version:  git-
             Keywords:  Memory leak  |  master
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 No step needed for reproduce.
 }}}
 There is a potential memory leak bug in file ass_split.c, here is the
 description.

 A piece of memory is allocated on line 283. When executing the loop twice
 and if the av_realloc_array returns null the function returns without
 freeing the memory pointed by order.

 {{{
         if (section->format_header && !order) {
             len = strlen(section->format_header);
             if (!strncmp(buf, section->format_header, len) && buf[len] ==
 ':') {
                 buf += len + 1;
                 while (!is_eol(*buf)) {
                     buf = skip_space(buf);
                     len = strcspn(buf, ", \r\n");
 283:                    if (!(tmp = av_realloc_array(order, (*number + 1),
 sizeof(*order))))
                         return NULL;
                     order = tmp;
                     order[*number] = -1;
                     for (i=0; section->fields[i].name; i++)
                         if (!strncmp(buf, section->fields[i].name, len)) {
                             order[*number] = i;
                             break;
                         }
                     (*number)++;
                     buf = skip_space(buf + len + (buf[len] == ','));
                 }
                 ctx->field_order[ctx->current_section] = order;
                 goto next_line;
             }
         }
 }}}

 Suggested fix:
 {{{free(order) before return NULL; on line 284}}}

 Thanks
 Gang
 Sbrella

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7019>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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