From ef02e544546b2878e583a09e3a47144b7fc1c2f6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 11 Apr 2021 21:04:12 +0200 Subject: [PATCH] avcodec/dpx: Check bits_per_color earlier Fixes: shift exponent 251 is too large for 32-bit type 'int' Fixes: 32147/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DPX_fuzzer-5519111675314176 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit c093eb30311b7148a4da1c7555498187c8cdf0db) Signed-off-by: Michael Niedermayer --- libavcodec/dpx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/dpx.c b/libavcodec/dpx.c index b1833ed9ef..03cbd3c78f 100644 --- a/libavcodec/dpx.c +++ b/libavcodec/dpx.c @@ -206,6 +206,9 @@ static int decode_frame(AVCodecContext *avctx, return AVERROR_PATCHWELCOME; } + if (bits_per_color > 32) + return AVERROR_INVALIDDATA; + buf += 820; avctx->sample_aspect_ratio.num = read32(&buf, endian); avctx->sample_aspect_ratio.den = read32(&buf, endian);