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avcodec/prosumer: Check remaining space in put byte context 

Fixes: Timeout
Fixes: 10053/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PROSUMER_fuzzer-5636993883570176

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-09-22 18:14:07 +02:00
parent 3b5945b146
commit 0f36ad514c
1 changed files with 2 additions and 0 deletions
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2
libavcodec/prosumer.c
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@ -57,6 +57,8 @@ static int decompress(GetByteContext *gb, int size, PutByteContext *pb, const ui
b = lut[2 * idx];
while (1) {
if (bytestream2_get_bytes_left_p(pb) <= 0)
return 0;
if (((b & 0xFF00u) != 0x8000u) || (b & 0xFFu)) {
if ((b & 0xFF00u) != 0x8000u) {
bytestream2_put_le16(pb, b);