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37 lines
1.3 KiB
37 lines
1.3 KiB
From 25eb00ce913452c2e614548d7df93070bf0d066f Mon Sep 17 00:00:00 2001
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From: Antonio Larrosa <larrosa@kde.org>
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Date: Mon, 6 Mar 2017 18:02:31 +0100
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Subject: [PATCH] clamp index values to fix index overflow in IMA.cpp
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This fixes #33
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(also reported at https://bugzilla.opensuse.org/show_bug.cgi?id=1026981
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and https://blogs.gentoo.org/ago/2017/02/20/audiofile-global-buffer-overflow-in-decodesample-ima-cpp/)
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---
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libaudiofile/modules/IMA.cpp | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/libaudiofile/modules/IMA.cpp b/libaudiofile/modules/IMA.cpp
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index 7476d44..df4aad6 100644
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--- a/libaudiofile/modules/IMA.cpp
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+++ b/libaudiofile/modules/IMA.cpp
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@@ -169,7 +169,7 @@ int IMA::decodeBlockWAVE(const uint8_t *encoded, int16_t *decoded)
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if (encoded[1] & 0x80)
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m_adpcmState[c].previousValue -= 0x10000;
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- m_adpcmState[c].index = encoded[2];
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+ m_adpcmState[c].index = clamp(encoded[2], 0, 88);
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*decoded++ = m_adpcmState[c].previousValue;
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@@ -210,7 +210,7 @@ int IMA::decodeBlockQT(const uint8_t *encoded, int16_t *decoded)
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predictor -= 0x10000;
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state.previousValue = clamp(predictor, MIN_INT16, MAX_INT16);
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- state.index = encoded[1] & 0x7f;
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+ state.index = clamp(encoded[1] & 0x7f, 0, 88);
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encoded += 2;
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for (int n=0; n<m_framesPerPacket; n+=2)
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--
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2.11.0
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