From ddb2dd7edbccc5596d8e3c039133be8444cb1d02 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 10 May 2017 00:50:05 +0200 Subject: [PATCH] avcodec/lagarith: Fix runtime error: left shift of negative value -1 Fixes: 1424/clusterfuzz-testcase-minimized-6088327159611392 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/lagarith.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c index 469eec4232..044497720f 100644 --- a/libavcodec/lagarith.c +++ b/libavcodec/lagarith.c @@ -98,7 +98,7 @@ static uint32_t softfloat_mul(uint32_t x, uint64_t mantissa) static uint8_t lag_calc_zero_run(int8_t x) { - return (x << 1) ^ (x >> 7); + return (x * 2) ^ (x >> 7); } static int lag_decode_prob(GetBitContext *gb, uint32_t *value) -- 2.11.0