From 58dd25f8adb151a59971daa94d352d3226d2dbb6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 8 Mar 2017 21:25:13 +0100 Subject: [PATCH] avcodec/mpegaudiodec_template: Check for negative e Fixes: undefined shift Fixes: 631/clusterfuzz-testcase-6725491035734016 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mpegaudiodec_template.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/mpegaudiodec_template.c b/libavcodec/mpegaudiodec_template.c index a3729a9e29..88f62727cb 100644 --- a/libavcodec/mpegaudiodec_template.c +++ b/libavcodec/mpegaudiodec_template.c @@ -251,7 +251,7 @@ static inline int l3_unscale(int value, int exponent) if(e < 1) av_log(NULL, AV_LOG_WARNING, "l3_unscale: e is %d\n", e); #endif - if (e > 31) + if (e > (SUINT)31) return 0; m = (m + (1 << (e - 1))) >> e;