From: Andreas Cadhalpun Date: Tue, 15 Dec 2015 22:43:03 +0000 (+0100) Subject: sonic: make sure num_taps * channels is not larger than frame_size X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=9637c2531f7eb040ad1c3cb46cb40a63dfc77b80;p=ffmpeg sonic: make sure num_taps * channels is not larger than frame_size If that is the case, the loop setting predictor_state in sonic_decode_frame causes out of bounds reads of int_samples, which has only frame_size number of elements. Reviewed-by: Michael Niedermayer Signed-off-by: Andreas Cadhalpun --- diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c index 4ec7d89fde3..2e3ca79fdd1 100644 --- a/libavcodec/sonic.c +++ b/libavcodec/sonic.c @@ -928,6 +928,13 @@ static av_cold int sonic_decode_init(AVCodecContext *avctx) s->frame_size = s->channels*s->block_align*s->downsampling; // avctx->frame_size = s->block_align; + if (s->num_taps * s->channels > s->frame_size) { + av_log(avctx, AV_LOG_ERROR, + "number of taps times channels (%d * %d) larger than frame size %d\n", + s->num_taps, s->channels, s->frame_size); + return AVERROR_INVALIDDATA; + } + av_log(avctx, AV_LOG_INFO, "Sonic: ver: %d.%d ls: %d dr: %d taps: %d block: %d frame: %d downsamp: %d\n", s->version, s->minor_version, s->lossless, s->decorrelation, s->num_taps, s->block_align, s->frame_size, s->downsampling);