From 0ae86db6ba600bf0533ab29969e5d6b32eeaac95 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 21 Sep 2023 00:13:27 +0200 Subject: [PATCH] avcodec/wavarc: Fix integer overflwo in do_stereo() Fixes: signed integer overflow: 148676193 - -2006512262 cannot be represented in type 'int' Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-5963163952349184 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit f3c986200d7f4ec934c480b09aa8a13554da032d) Signed-off-by: Michael Niedermayer --- libavcodec/wavarc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/wavarc.c b/libavcodec/wavarc.c index 09784a016d..64d5b347ac 100644 --- a/libavcodec/wavarc.c +++ b/libavcodec/wavarc.c @@ -141,11 +141,11 @@ static void do_stereo(WavArcContext *s, int ch, int correlated, int len) } else { if (correlated) { for (int n = 0; n < nb_samples; n++) - s->samples[1][n + len] += s->samples[0][n + len]; + s->samples[1][n + len] += (unsigned)s->samples[0][n + len]; } for (int n = 0; n < len; n++) { s->pred[0][n] = s->samples[1][nb_samples + n]; - s->pred[1][n] = s->pred[0][n] - s->samples[0][nb_samples + n]; + s->pred[1][n] = s->pred[0][n] - (unsigned)s->samples[0][nb_samples + n]; } } }