Fixes: signed integer overflow: 9223372036854775360 + 536870912 cannot be represented in type 'long' Fixes: 37940/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6095637855207424
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 | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavformat/mov.c b/libavformat/mov.c index 4bc42d6b20e..d816242c0b7 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -5109,7 +5109,7 @@ static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom) // See if the remaining bytes are just an mfra which we can ignore. is_complete = offset == stream_size; - if (!is_complete && (pb->seekable & AVIO_SEEKABLE_NORMAL)) { + if (!is_complete && (pb->seekable & AVIO_SEEKABLE_NORMAL) && stream_size > 0 ) { int64_t ret; int64_t original_pos = avio_tell(pb); if (!c->have_read_mfra_size) { @@ -5120,7 +5120,7 @@ static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom) if ((ret = avio_seek(pb, original_pos, SEEK_SET)) < 0) return ret; } - if (offset + c->mfra_size == stream_size) + if (offset == stream_size - c->mfra_size) is_complete = 1; } -- 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".
