Fixes: signed integer overflow: -1241665686 + -1340629419 cannot be represented in type 'int' Fixes: 15922/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5692826442006528
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/vividas.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/libavformat/vividas.c b/libavformat/vividas.c index 1895c75858..c3d3cf548c 100644 --- a/libavformat/vividas.c +++ b/libavformat/vividas.c @@ -374,8 +374,11 @@ static int track_header(VividasDemuxContext *viv, AVFormatContext *s, uint8_t * ffio_read_varlen(pb); // len_3 num_data = avio_r8(pb); for (j = 0; j < num_data; j++) { - data_len[j] = ffio_read_varlen(pb); - xd_size += data_len[j]; + uint64_t len = ffio_read_varlen(pb); + if (len > INT_MAX/2 - xd_size) + return AVERROR_INVALIDDATA; + data_len[j] = len; + xd_size += len; } st->codecpar->extradata_size = 64 + xd_size + xd_size / 255; -- 2.22.0 _______________________________________________ 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".
