From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: linux-sgx@vger.kernel.org, Andy Lutomirski <luto@kernel.org>
Subject: [PATCH for_v22 1/6] x86/sgx: Validate generic SECINFO immediately after copying from user
Date: Thu, 8 Aug 2019 15:13:35 -0700 [thread overview]
Message-ID: <20190808221340.29460-2-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20190808221340.29460-1-sean.j.christopherson@intel.com>
When adding pages to the encalve, verify the SECINFO flags provided by
userspace are valid prior to consuming the protection bits and to avoid
allocating a page when SECINFO is invalid.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/kernel/cpu/sgx/driver/ioctl.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/driver/ioctl.c b/arch/x86/kernel/cpu/sgx/driver/ioctl.c
index f2b9f0ece9ca..f14d9abd9b0d 100644
--- a/arch/x86/kernel/cpu/sgx/driver/ioctl.c
+++ b/arch/x86/kernel/cpu/sgx/driver/ioctl.c
@@ -518,8 +518,6 @@ static int sgx_encl_add_page(struct sgx_encl *encl, unsigned long addr,
struct sgx_va_page *va_page;
int ret;
- if (sgx_validate_secinfo(secinfo))
- return -EINVAL;
if (page_type == SGX_SECINFO_TCS) {
ret = sgx_validate_tcs(encl, data);
if (ret)
@@ -634,6 +632,9 @@ static long sgx_ioc_enclave_add_page(struct file *filep, void __user *arg)
sizeof(secinfo)))
return -EFAULT;
+ if (sgx_validate_secinfo(&secinfo))
+ return -EINVAL;
+
data_page = alloc_page(GFP_HIGHUSER);
if (!data_page)
return -ENOMEM;
--
2.22.0
next prev parent reply other threads:[~2019-08-08 22:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 22:13 [PATCH for_v22 0/6] x86/sgx: Remove EADD worker and page copy Sean Christopherson
2019-08-08 22:13 ` Sean Christopherson [this message]
2019-08-08 22:13 ` [PATCH for_v22 2/6] x86/sgx: Set SGX_ENCL_PAGE_TCS when allocating encl_page Sean Christopherson
2019-08-08 22:13 ` [PATCH for_v22 3/6] x86/sgx: Move encl_page insertion into tree out of alloc flow Sean Christopherson
2019-08-08 22:13 ` [PATCH for_v22 4/6] x86/sgx: Allocate encl_page prior to taking encl->lock Sean Christopherson
2019-08-08 22:13 ` [PATCH for_v22 5/6] x86/sgx: Remove the EADD page worker Sean Christopherson
2019-08-08 22:13 ` [PATCH for_v22 6/6] x86/sgx: Pass userspace source address directly to EADD Sean Christopherson
2019-08-09 16:21 ` [PATCH for_v22 0/6] x86/sgx: Remove EADD worker and page copy Jarkko Sakkinen
2019-08-09 16:22 ` Sean Christopherson
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