Fixes: signed integer overflow: 9223372036854775584 + 536870912 cannot be represented in type 'long' Fixes: 55844/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-510613920664780
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/mov.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/libavformat/mov.c b/libavformat/mov.c index 6ab43b00c6..8af564ed61 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -4192,6 +4192,13 @@ static void mov_build_index(MOVContext *mov, AVStream *st) if (keyframe) distance = 0; sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample]; + if (current_offset > INT64_MAX - sample_size) { + av_log(mov->fc, AV_LOG_ERROR, "Current offset %"PRId64" or sample size %u is too large\n", + current_offset, + sample_size); + return; + } + if (sc->pseudo_stream_id == -1 || sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) { AVIndexEntry *e; -- 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".
