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Subject[PATCH] x86/sgx: Allows ioctl PROVISION to execute before CREATE
Date
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@linux.alibaba.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
---
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;

/* Set only after completion, as encl->lock has not been taken. */
set_bit(SGX_ENCL_CREATED, &encl->flags);
--
2.19.1.3.ge56e4f7
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