From: Michael Niedermayer Date: Sun, 27 Feb 2022 14:43:04 +0100 Subject: [PATCH] avcodec/g729_parser: Check channels Fixes: signed integer overflow: 10 * 808464428 cannot be represented in type 'int' Fixes: assertion failure Fixes: ticket9651 Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer (cherry picked from commit 757da974b21833529cc41bdcc9684c29660cdfa8) Signed-off-by: Michael Niedermayer CVE: CVE-2022-1475 Upstream-Status: Backport [https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=e9e2ddbc6c78cc18b76093617f82c920e58a8d1f] Comment: Patch is refreshed as per ffmpeg codebase Signed-off-by: Virendra Thakur --- libavcodec/g729_parser.c | 3 +++ 1 file changed, 3 insertions(+) Index: ffmpeg-4.2.2/libavcodec/g729_parser.c =================================================================== --- a/libavcodec/g729_parser.c +++ b/libavcodec/g729_parser.c @@ -48,6 +48,9 @@ static int g729_parse(AVCodecParserConte av_assert1(avctx->codec_id == AV_CODEC_ID_G729); /* FIXME: replace this heuristic block_size with more precise estimate */ s->block_size = (avctx->bit_rate < 8000) ? G729D_6K4_BLOCK_SIZE : G729_8K_BLOCK_SIZE; + // channels > 2 is invalid, we pass the packet on unchanged + if (avctx->channels > 2) + s->block_size = 0; s->block_size *= avctx->channels; s->duration = avctx->frame_size; }