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avcodec/rv10: Avoid calculating undefined value that is unused 

Fixes: shift exponent 64 is too large for 32-bit type 'int'
Fixes: 15253/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RV10_fuzzer-5671114300194816

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 2019-06-16 12:52:30 +02:00
parent bfb58bdd70
commit d57f6606eb
1 changed files with 1 additions and 1 deletions
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libavcodec/rv10.c
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@ -646,7 +646,7 @@ static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
// Repeat the slice end check from ff_h263_decode_mb with our active
// bitstream size
if (ret != SLICE_ERROR) {
if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
int v = show_bits(&s->gb, 16);
if (get_bits_count(&s->gb) + 16 > active_bits_size)