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avformat/wavenc: Check umid length 

Fixes potential out of array read

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-05-10 19:54:41 +02:00
parent ecb4ae7879
commit 004564c930
1 changed files with 1 additions and 1 deletions
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libavformat/wavenc.c
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@ -120,7 +120,7 @@ static void bwf_write_bext_chunk(AVFormatContext *s)
avio_wl64(s->pb, time_reference);
avio_wl16(s->pb, 1); // set version to 1
if (tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) {
if ((tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) && strlen(tmp_tag->value) > 2) {
unsigned char umidpart_str[17] = {0};
int64_t i;
uint64_t umidpart;