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Code Issues Releases Wiki Activity

Guard against unusually large numbers of channels in imported .wav file.

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This commit is contained in:
Paul Licameli 2015-12-20 19:11:04 -05:00
parent f6b89ae80f
commit 407c1dc4b2
1 changed files with 20 additions and 4 deletions
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24
src/import/ImportPCM.cpp
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@ -53,6 +53,8 @@
#include "../WaveTrack.h"
#include "ImportPlugin.h"
#include <algorithm>
#ifdef USE_LIBID3TAG
#include <id3tag.h>
// DM: the following functions were supposed to have been
@ -413,15 +415,29 @@ int PCMImportFileHandle::Import(TrackFactory *trackFactory,
// samples from the file and store our own local copy of the
// samples in the tracks.
samplePtr srcbuffer = NewSamples(maxBlockSize * mInfo.channels,
mFormat);
samplePtr buffer = NewSamples(maxBlockSize, mFormat);
// PRL: guard against excessive memory buffer allocation in case of many channels
__int64 maxBlock = std::min(maxBlockSize,
__int64(std::numeric_limits<int>::max() /
(mInfo.channels * SAMPLE_SIZE(mFormat)))
);
if (maxBlock < 1)
return eProgressFailed;
samplePtr srcbuffer;
while (NULL == (srcbuffer = NewSamples(maxBlock * mInfo.channels, mFormat)))
{
maxBlock >>= 1;
if (maxBlock < 1)
return eProgressFailed;
}
samplePtr buffer = NewSamples(maxBlock, mFormat);
unsigned long framescompleted = 0;
long block;
do {
block = maxBlockSize;
block = maxBlock;
if (mFormat == int16Sample)
block = sf_readf_short(mFile, (short *)srcbuffer, block);