From 28c7094b25b689185155a6833caf2747b94774a4 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 4 Apr 2024 00:15:27 +0200 Subject: [PATCH] avcodec/wavarc: fix signed integer overflow in block type 6/19 Fixes: signed integer overflow: -2088796289 + -91276551 cannot be represented in type 'int' Fixes: 67772/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6533568953122816 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/wavarc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/wavarc.c b/libavcodec/wavarc.c index 7083494cd8..b4b26958e6 100644 --- a/libavcodec/wavarc.c +++ b/libavcodec/wavarc.c @@ -647,7 +647,7 @@ static int decode_5elp(AVCodecContext *avctx, for (int o = 0; o < order; o++) sum += s->filter[ch][o] * (unsigned)samples[n + 70 - o - 1]; - samples[n + 70] += ac_out[n] + (sum >> 4); + samples[n + 70] += ac_out[n] + (unsigned)(sum >> 4); } for (int n = 0; n < 70; n++)