From 7ce40dde03ea56684f2cb6b40991a90bc38c3ad9 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 26 Dec 2020 18:55:08 +0100 Subject: [PATCH] avcodec/alsdec: Fix integer overflow with quant_cof Fixes: signed integer overflow: -210824 * 16384 cannot be represented in type 'int' Fixes: 28670/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5682310846480384 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/alsdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c index c318ad088e..b3c444c54f 100644 --- a/libavcodec/alsdec.c +++ b/libavcodec/alsdec.c @@ -762,7 +762,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd) } for (k = 2; k < opt_order; k++) - quant_cof[k] = (quant_cof[k] * (1 << 14)) + (add_base << 13); + quant_cof[k] = (quant_cof[k] * (1U << 14)) + (add_base << 13); } }