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avformat/matroskaenc: Check functions that can fail

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Sometimes it has not been checked whether opening the dynamic buffer for
writing Tags fails; this might have led to segfaults.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b4f300f8ea)
This commit is contained in:
Andreas Rheinhardt
2020-01-01 01:58:23 +01:00
parent 7f2ab227e0
commit 12efc04b3b
1 changed files with 7 additions and 2 deletions
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9
libavformat/matroskaenc.c
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@@ -1578,7 +1578,9 @@ static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
if (ret < 0) return ret;
start_ebml_master_crc32(&mkv->tags_bc, mkv);
ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
if (ret < 0)
return ret;
}
pb = mkv->tags_bc;
@@ -1674,7 +1676,10 @@ static int mkv_write_tags(AVFormatContext *s)
if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
continue;
mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tag_target);
ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
i + 1, &tag_target);
if (ret < 0)
return ret;
pb = mkv->tags_bc;
tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);