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PeFile::rebuildImports(): Allow strlen() up to the very end of a logical block

Browse Source 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65650
https://github.com/upx/upx/issues/769
	modified:   pefile.cpp
This commit is contained in:
John Reiser 2024-01-11 09:57:57 -08:00 committed by Markus F.X.J. Oberhumer
parent e4a611bcae
commit 2ad0d51226
1 changed files with 4 additions and 2 deletions
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6
src/pefile.cpp
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@ -2948,10 +2948,12 @@ void PeFile::unpack0(OutputFile *fo, const ht &ih, ht &oh, ord_mask_t ord_mask,
if (iobjs > 2) { if (iobjs > 2) {
// read the noncompressed section // read the noncompressed section
unsigned const size = isection[2].size;
ibuf.dealloc(); ibuf.dealloc();
ibuf.alloc(isection[2].size); ibuf.alloc(size + 1);
fi->seek(isection[2].rawdataptr, SEEK_SET); fi->seek(isection[2].rawdataptr, SEEK_SET);
fi->readx(ibuf, ibufgood = isection[2].size); fi->readx(ibuf, ibufgood = size);
ibuf[size] = 0; // allow strlen() up to 'size'
} }
// unfilter // unfilter