Fixes: shift exponent -1 is negative Fixes: 65378/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5457678193197056
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/jpeg2000htdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/jpeg2000htdec.c b/libavcodec/jpeg2000htdec.c index 6b9898d3ff..0b94bb5da2 100644 --- a/libavcodec/jpeg2000htdec.c +++ b/libavcodec/jpeg2000htdec.c @@ -1193,6 +1193,9 @@ ff_jpeg2000_decode_htj2k(const Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c int32_t M_b = magp; + if (magp >= 31) + return AVERROR_INVALIDDATA; + /* codeblock size as constrained by Rec. ITU-T T.800, Table A.18 */ av_assert0(width <= 1024U && height <= 1024U); av_assert0(width * height <= 4096); -- 2.17.1 _______________________________________________ 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".
