The return value is int we can thus not handle 31 or more bits Fixes: integer overflow Fixes: 418396701/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VVC_fuzzer-4730994378997760
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/vvc/cabac.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/vvc/cabac.c b/libavcodec/vvc/cabac.c index 6847ce59aff..78703cb065e 100644 --- a/libavcodec/vvc/cabac.c +++ b/libavcodec/vvc/cabac.c @@ -937,6 +937,8 @@ static int kth_order_egk_decode(CABACContext *c, int k) while (bit) { bit = get_cabac_bypass(c); + if (k >= 31) + return AVERROR_PATCHWELCOME; value += bit << k++; } -- 2.49.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
