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avformat/mvdec: Check if name was fully read

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Fixes: use of uninitialized value
Fixes: 70901/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-6341913949569024

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-08-15 00:37:05 +02:00
parent 5338707930
commit 4e39795c75
1 changed files with 2 additions and 1 deletions
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3
libavformat/mvdec.c
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@ -256,7 +256,8 @@ static int read_table(AVFormatContext *avctx, AVStream *st,
if (avio_feof(pb)) if (avio_feof(pb))
return AVERROR_EOF; return AVERROR_EOF;
avio_read(pb, name, 16); if (avio_read(pb, name, 16) != 16)
return AVERROR_INVALIDDATA;
name[sizeof(name) - 1] = 0; name[sizeof(name) - 1] = 0;
size = avio_rb32(pb); size = avio_rb32(pb);
if (size < 0) { if (size < 0) {