From 8e50bd61e4ff97bd7fc6cbd7ec4ca514e17a70c4 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Wed, 31 Jan 2018 02:50:18 +0100
Subject: [PATCH] avcodec/wavpack: Fix integer overflow in FFABS
Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 5396/clusterfuzz-testcase-minimized-6558555529281536
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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index d5e1e07b743..0e40b298799 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -480,7 +480,7 @@ static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb,
}
if (type == AV_SAMPLE_FMT_S16P) {
- if (FFABS(L) + (unsigned)FFABS(R) > (1<<19)) {
+ if (FFABS((int64_t)L) + FFABS((int64_t)R) > (1<<19)) {
av_log(s->avctx, AV_LOG_ERROR, "sample %d %d too large\n", L, R);
return AVERROR_INVALIDDATA;
}
--
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