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LibGfx: Add table size validation for ICC lut16Type

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Nico Weber 2023-02-05 12:42:58 -05:00 • committed by Tim Flynn
parent b8003fa027
commit ce78394ae8
1 changed files with 8 additions and 0 deletions
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8
Userland/Libraries/LibGfx/ICC/TagTypes.cpp
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@ -97,6 +97,14 @@ ErrorOr<NonnullRefPtr<Lut16TagData>> Lut16TagData::from_bytes(ReadonlyBytes byte
u16 number_of_output_table_entries = *bit_cast<BigEndian<u16> const*>(bytes.data() + 8 + sizeof(LUTHeader) + 2);
ReadonlyBytes table_bytes = bytes.slice(8 + sizeof(LUTHeader) + 4);
// "Each input table consists of a minimum of two and a maximum of 4096 uInt16Number integers.
if (number_of_input_table_entries < 2 || number_of_input_table_entries > 4096)
return Error::from_string_literal("ICC::Profile: lut16Type bad number of input table entries");
// "Each output table consists of a minimum of two and a maximum of 4096 uInt16Number integers."
if (number_of_output_table_entries < 2 || number_of_output_table_entries > 4096)
return Error::from_string_literal("ICC::Profile: lut16Type bad number of output table entries");
EMatrix3x3 e;
for (int i = 0; i < 9; ++i)
e.e[i] = S15Fixed16::create_raw(header.e_parameters[i]);