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avcodec/gdv: Check for truncated tags in decompress_5()

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Testcase: 13169/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_GDV_fuzzer-5666354038833152

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 5cf42f65b60d226d1223d2100cb1d90402189275)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-02-25 01:26:30 +01:00
parent 24e4039c6f
commit 87eecb7d85
1 changed files with 2 additions and 0 deletions

2
libavcodec/gdv.c

@ -244,6 +244,8 @@ static int decompress_5(AVCodecContext *avctx, unsigned skip)
while (bytestream2_get_bytes_left_p(pb) > 0 && bytestream2_get_bytes_left(gb) > 0) {
int tag = read_bits2(&bits, gb);
if (bytestream2_get_bytes_left(gb) < 1)
return AVERROR_INVALIDDATA;
if (tag == 0) {
bytestream2_put_byte(pb, bytestream2_get_byte(gb));
} else if (tag == 1) {