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x86/sgx: Add overflow check in sgx_validate_offset_length()
commit f0861f4 upstream. sgx_validate_offset_length() function verifies "offset" and "length" arguments provided by userspace, but was missing an overflow check on their addition. Add it. Fixes: c6d26d3 ("x86/sgx: Add SGX_IOC_ENCLAVE_ADD_PAGES") Signed-off-by: Borys Popławski <borysp@invisiblethingslab.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Cc: stable@vger.kernel.org # v5.11+ Link: https://lore.kernel.org/r/0d91ac79-6d84-abed-5821-4dbe59fa1a38@invisiblethingslab.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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