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efi_loader: parameter checks CalculateCrc32()
Not checking the parameters may lead reading or writing from NULL. Implement the parameter checks prescribed in the UEFI spec. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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226cddbe32
commit
db80fe3866
@ -2465,9 +2465,16 @@ static efi_status_t EFIAPI efi_calculate_crc32(const void *data,
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efi_uintn_t data_size,
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efi_uintn_t data_size,
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u32 *crc32_p)
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u32 *crc32_p)
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{
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{
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efi_status_t ret = EFI_SUCCESS;
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EFI_ENTRY("%p, %zu", data, data_size);
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EFI_ENTRY("%p, %zu", data, data_size);
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if (!data || !data_size || !crc32_p) {
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ret = EFI_INVALID_PARAMETER;
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goto out;
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}
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*crc32_p = crc32(0, data, data_size);
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*crc32_p = crc32(0, data, data_size);
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return EFI_EXIT(EFI_SUCCESS);
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out:
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return EFI_EXIT(ret);
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}
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}
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/**
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/**
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