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avformat/wtvdec: Check that language is fully read

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Fixes: use-of-uninitialized-value
Fixes: 483856523/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-5221422609006592

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 989d6ddea0)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2026-02-22 13:47:23 +01:00
parent febba238be
commit 07f5159ddb
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1 changed files with 2 additions and 1 deletions
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libavformat/wtvdec.c
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@ -894,7 +894,8 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
AVStream *st = s->streams[stream_index];
uint8_t language[4];
avio_skip(pb, 12);
avio_read(pb, language, 3);
if (avio_read(pb, language, 3) != 3)
return AVERROR_INVALIDDATA;
if (language[0]) {
language[3] = 0;
av_dict_set(&st->metadata, "language", language, 0);