ffmpeg | branch: release/3.4 | Michael Niedermayer <mich...@niedermayer.cc> | Fri Nov 8 17:28:27 2019 +0100| [2f942ddf7415baa55bdd4e60038526c35571b0c5] | committer: Michael Niedermayer
avcodec/vmdaudio: Check chunk counts to avoid integer overflow Fixes: signed integer overflow: 4 * 538976288 cannot be represented in type 'int' Fixes: 18622/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMDAUDIO_fuzzer-5092166174507008 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 47d963335eb2c36c0e6615d7971c762458e813dd) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2f942ddf7415baa55bdd4e60038526c35571b0c5 --- libavcodec/vmdaudio.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/vmdaudio.c b/libavcodec/vmdaudio.c index e8c8a064c7..c7826fa3ce 100644 --- a/libavcodec/vmdaudio.c +++ b/libavcodec/vmdaudio.c @@ -179,6 +179,9 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data, /* drop incomplete chunks */ buf_size = audio_chunks * s->chunk_size; + if (silent_chunks + audio_chunks >= INT_MAX / avctx->block_align) + return AVERROR_INVALIDDATA; + /* get output buffer */ frame->nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) / avctx->channels; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
