Fixes: signed integer overflow: -2147483648 - 4 cannot be represented in type 'int' Fixes: 26907/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CFHD_fuzzer-5746202330267648
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/cfhd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/cfhd.c b/libavcodec/cfhd.c index a2b9c7c76a..e3fbfa4b91 100644 --- a/libavcodec/cfhd.c +++ b/libavcodec/cfhd.c @@ -617,6 +617,10 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame, s->peak.level = 0; } else if (tag == -PeakLevel && s->peak.offset) { s->peak.level = data; + if (s->peak.offset < INT_MIN + 4) { + ret = AVERROR_INVALIDDATA; + goto end; + } bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR); } else av_log(avctx, AV_LOG_DEBUG, "Unknown tag %i data %x\n", tag, data); -- 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".
