From ccca484324e04dff4cb81d0f9018ae828e6b5c89 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 4 Aug 2019 17:20:45 +0200 Subject: [PATCH] avcodec/ralf: Fix integer overflow in apply_lpc() Fixes: signed integer overflow: 1603085316 + 1238786562 cannot be represented in type 'int' Fixes: 16203/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RALF_fuzzer-5086088934195200 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/ralf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/ralf.c b/libavcodec/ralf.c index 3f7953c6db..0d6b57d652 100644 --- a/libavcodec/ralf.c +++ b/libavcodec/ralf.c @@ -323,7 +323,7 @@ static void apply_lpc(RALFContext *ctx, int ch, int length, int bits) acc = 0; for (j = 0; j < flen; j++) - acc += ctx->filter[j] * audio[i - j - 1]; + acc += (unsigned)ctx->filter[j] * audio[i - j - 1]; if (acc < 0) { acc = (acc + bias - 1) >> ctx->filter_bits; acc = FFMAX(acc, min_clip);