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avformat/dashdec: Fix leak of representation on error 

If parsing a representation fails, it is not added to the list of
representations and is therefore not freed in dash_close(); it therefore
leaked in most error paths in parse_manifest_representation() (some
error paths had (incomplete) code for freeing). This commit fixes
freeing the representation in this case.

Reviewed-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-09-19 04:28:47 +02:00
parent 5d63f154ef
commit 5c91701dc7
1 changed files with 21 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
libavformat/dashdec.c
View File

@ -887,9 +887,8 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
c->max_url_size = aligned(c->max_url_size
+ (rep_id_val ? strlen(rep_id_val) : 0)
+ (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
if (ret == AVERROR(ENOMEM) || ret == 0) {
goto end;
}
if (ret == AVERROR(ENOMEM) || ret == 0)
goto free;
if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
fragment_timeline_node = NULL;
fragment_templates_tab[0] = representation_segmenttemplate_node;
@ -907,19 +906,12 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
if (initialization_val) {
rep->init_section = av_mallocz(sizeof(struct fragment));
if (!rep->init_section) {
av_free(rep);
ret = AVERROR(ENOMEM);
goto end;
}
if (!rep->init_section)
goto enomem;
c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
if (!rep->init_section->url) {
av_free(rep->init_section);
av_free(rep);
ret = AVERROR(ENOMEM);
goto end;
}
if (!rep->init_section->url)
goto enomem;
rep->init_section->size = -1;
xmlFree(initialization_val);
}
@ -974,23 +966,19 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
while (fragment_timeline_node) {
ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
if (ret < 0) {
return ret;
}
if (ret < 0)
goto free;
fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
}
}
} else if (representation_baseurl_node && !representation_segmentlist_node) {
seg = av_mallocz(sizeof(struct fragment));
if (!seg) {
ret = AVERROR(ENOMEM);
goto end;
}
if (!seg)
goto enomem;
seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
if (!seg->url) {
av_free(seg);
ret = AVERROR(ENOMEM);
goto end;
goto enomem;
}
seg->size = -1;
dynarray_add(&rep->fragments, &rep->n_fragments, seg);
@ -1027,9 +1015,8 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
baseurl_nodes,
rep_id_val,
rep_bandwidth_val);
if (ret < 0) {
return ret;
}
if (ret < 0)
goto free;
fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
}
@ -1040,16 +1027,14 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
while (fragment_timeline_node) {
ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
if (ret < 0) {
return ret;
}
if (ret < 0)
goto free;
fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
}
}
} else {
free_representation(rep);
rep = NULL;
av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
goto free;
}
if (rep) {
@ -1090,6 +1075,11 @@ end:
xmlFree(rep_framerate_val);
return ret;
enomem:
ret = AVERROR(ENOMEM);
free:
free_representation(rep);
goto end;
}
static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)