[PATCH 3/3] x86/sgx: Use SGX_LAUNCH_TOKEN_SIZE in __sgx_virt_einit()

[Thorsten Blum]

Both sgx_ioc_enclave_init() and __sgx_virt_einit() use the same 304-byte
launch token. Use SGX_LAUNCH_TOKEN_SIZE in __sgx_virt_einit() instead of
maintaining a second local definition, ensuring the token initialization
and validation paths use the same size.

Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxx>
---
 arch/x86/kernel/cpu/sgx/virt.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/sgx/virt.c b/arch/x86/kernel/cpu/sgx/virt.c
index db6806c40483..fa9173a9384a 100644
--- a/arch/x86/kernel/cpu/sgx/virt.c
+++ b/arch/x86/kernel/cpu/sgx/virt.c
@@ -394,9 +394,8 @@ static int __sgx_virt_einit(void __user *sigstruct, void __user *token,
 	 * All other checks deferred to ENCLS itself.  Also see comment
 	 * for @secs in sgx_virt_ecreate().
 	 */
-#define SGX_EINITTOKEN_SIZE	304
 	if (WARN_ON_ONCE(!access_ok(sigstruct, sizeof(struct sgx_sigstruct)) ||
-			 !access_ok(token, SGX_EINITTOKEN_SIZE) ||
+			 !access_ok(token, SGX_LAUNCH_TOKEN_SIZE) ||
 			 !access_ok(secs, PAGE_SIZE)))
 		return -EINVAL;