From a2ec2bd49317ab16a3c30c0824efc580ea9a8aef Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 26 Apr 2024 05:08:38 +0200 Subject: [PATCH] avcodec/wavarc: fix integer overflow in decode_5elp() block type 2 Fixes: signed integer overflow: 2097152000 + 107142979 cannot be represented in type 'int' Fixes: 67919/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-5955101769400320 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 b4b26958e6..93b76c43e8 100644 --- a/libavcodec/wavarc.c +++ b/libavcodec/wavarc.c @@ -689,7 +689,7 @@ 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++)