From dac56d9ce01eb9963f28f26b97a81db5cbd46c1c Mon Sep 17 00:00:00 2001 From: Alex Converse Date: Wed, 25 Jan 2012 15:27:11 -0800 Subject: [PATCH] qdm2: Check data block size for bytes to bits overflow. Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org --- libavcodec/qdm2.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c index 91c47a8ec2..6acb7d8362 100644 --- a/libavcodec/qdm2.c +++ b/libavcodec/qdm2.c @@ -1819,6 +1819,10 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx) extradata += 4; s->checksum_size = AV_RB32(extradata); + if (s->checksum_size >= 1U << 28) { + av_log(avctx, AV_LOG_ERROR, "data block size too large (%u)\n", s->checksum_size); + return AVERROR_INVALIDDATA; + } s->fft_order = av_log2(s->fft_size) + 1; s->fft_frame_size = 2 * s->fft_size; // complex has two floats