Hi,
On 1/20/21 4:05 AM, Sean Christopherson wrote:
On Mon, Jan 18, 2021, Tianjia Zhang wrote:
In function sgx_encl_create(), the logic of directly assigning
value to attributes_mask determines that the call to
SGX_IOC_ENCLAVE_PROVISION must be after the command of
SGX_IOC_ENCLAVE_CREATE. If change this assignment statement to
or operation, the PROVISION command can be executed earlier and
more flexibly.
Reported-by: Jia Zhang <zhang.jia@xxxxxxxxxxxxxxxxx>
Signed-off-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/sgx/ioctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c
index f45957c05f69..0ca3fc238bc2 100644
--- a/arch/x86/kernel/cpu/sgx/ioctl.c
+++ b/arch/x86/kernel/cpu/sgx/ioctl.c
@@ -108,7 +108,7 @@ static int sgx_encl_create(struct sgx_encl *encl, struct sgx_secs *secs)
encl->base = secs->base;
encl->size = secs->size;
encl->attributes = secs->attributes;
- encl->attributes_mask = SGX_ATTR_DEBUG | SGX_ATTR_MODE64BIT | SGX_ATTR_KSS;
+ encl->attributes_mask |= SGX_ATTR_DEBUG | SGX_ATTR_MODE64BIT | SGX_ATTR_KSS;
Alternatively, move the existing code to sgx_open()? Initializing the field
when the encl object is allocated feels more correct.
This seems like a good idea. Thanks for your suggestion. I have sent v2
patch, include the next two patches.
Best regards,
Tianjia
