From 5f89747086af741ddc34e2378cde8519b8faee78 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Mon, 19 Jun 2017 14:08:58 +0200
Subject: [PATCH] avcodec/wavpack: Fix undefined integer negation
Fixes: runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 2291/clusterfuzz-testcase-minimized-5538453481586688
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/wavpack.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 6e601f02fa5..ac43c13da58 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -313,8 +313,8 @@ static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S)
S *= 1U << s->float_shift;
sign = S < 0;
if (sign)
- S = -S;
- if (S >= 0x1000000) {
+ S = -(unsigned)S;
+ if (S >= 0x1000000U) {
if (s->got_extra_bits && get_bits1(&s->gb_extra_bits))
S = get_bits(&s->gb_extra_bits, 23);
else
--
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