From 0e45886e6ea272f453cb949e95c3bfd8380974c5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 17 Sep 2021 21:40:59 +0200 Subject: avcodec/apedec: Fix integer overflow in filter_fast_3320() Fixes: signed integer overflow: 2145649668 + 3956526 cannot be represented in type 'int' Fixes: 38351/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-4647077926273024 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/apedec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libavcodec/apedec.c') diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c index 050523601d..27d0ff3565 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -879,7 +879,7 @@ static av_always_inline int filter_fast_3320(APEPredictor *p, } predictionA = p->buf[delayA] * 2U - p->buf[delayA - 1]; - p->lastA[filter] = decoded + ((int32_t)(predictionA * p->coeffsA[filter][0]) >> 9); + p->lastA[filter] = decoded + (unsigned)((int32_t)(predictionA * p->coeffsA[filter][0]) >> 9); if ((decoded ^ predictionA) > 0) p->coeffsA[filter][0]++; -- cgit v1.2.3