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avformat/dashdec: Fix strlen(rep_id_val) with it being NULL 

Fixes: dash-crash-da39a3ee5e6b4b0d3255bfef95601890afd80709.xml

Found-by: Paul Ch <paulcher@icloud.com>
Reviewed-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-08-18 02:19:51 +02:00
parent 85c00643b7
commit 46753bfdd0
1 changed files with 3 additions and 1 deletions
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4
libavformat/dashdec.c
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@ -857,7 +857,9 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
baseurl_nodes[3] = representation_baseurl_node;
ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
c->max_url_size = aligned(c->max_url_size + strlen(rep_id_val) + strlen(rep_bandwidth_val));
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;
}