From d909850308eb08f7ade9b1585ef30d997091f740 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 28 Mar 2022 00:12:17 +0200 Subject: [PATCH] avcodec/apedec: fix a integer overflow in long_filter_high_3800() Fixes: signed integer overflow: -2146549696 - 3923884 cannot be represented in type 'int' Fixes: 45907/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5992380584558592 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit b085b400becb93ccc68d786ab738b1fc50408b89) Signed-off-by: Michael Niedermayer --- libavcodec/apedec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c index 43d7110c57..23f4d3a093 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -928,7 +928,7 @@ static void long_filter_high_3800(int32_t *buffer, int order, int shift, int len dotprod += delay[j] * (unsigned)coeffs[j]; coeffs[j] += ((delay[j] >> 31) | 1) * sign; } - buffer[i] -= dotprod >> shift; + buffer[i] -= (unsigned)(dotprod >> shift); for (j = 0; j < order - 1; j++) delay[j] = delay[j + 1]; delay[order - 1] = buffer[i];