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Make overflow not possible

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This commit is contained in:
Nikolay Degterinsky 2023-11-22 16:33:34 +00:00
parent 69efc1b05f
commit 761b55ccf4
1 changed files with 1 additions and 2 deletions
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3
src/Compression/CompressionCodecGorilla.cpp
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@ -267,7 +267,6 @@ template <typename T>
void decompressDataForType(const char * source, UInt32 source_size, char * dest, UInt32 dest_size)
{
const char * const source_end = source + source_size;
const char * const dest_end = dest + dest_size;
if (source + sizeof(UInt32) > source_end)
return;
@ -281,7 +280,7 @@ void decompressDataForType(const char * source, UInt32 source_size, char * dest,
if (source + sizeof(T) > source_end || items_count < 1)
return;
if (dest + items_count * sizeof(T) > dest_end)
if (static_cast<UInt64>(items_count) * sizeof(T) > dest_size)
throw Exception(ErrorCodes::CANNOT_DECOMPRESS, "Cannot decompress Gorilla-encoded data: corrupted input data.");
prev_value = unalignedLoadLittleEndian<T>(source);