[09/22] x86/sgx: Use vma_lookup() in sgx_encl_find()

Commit Message

Liam R. Howlett May 10, 2021, 4:58 p.m. UTC

Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Signed-off-by: Liam R. Howlett <[e-mail]>
---
 arch/x86/kernel/cpu/sgx/encl.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/arch/x86/kernel/cpu/sgx/encl.h b/arch/x86/kernel/cpu/sgx/encl.h
index 6e74f85b6264..fec43ca65065 100644
--- a/arch/x86/kernel/cpu/sgx/encl.h
+++ b/arch/x86/kernel/cpu/sgx/encl.h
@@ -91,8 +91,8 @@  static inline int sgx_encl_find(struct mm_struct *mm, unsigned long addr,
 {
 	struct vm_area_struct *result;
 
-	result = find_vma(mm, addr);
-	if (!result || result->vm_ops != &sgx_vm_ops || addr < result->vm_start)
+	result = vma_lookup(mm, addr);
+	if (!result || result->vm_ops != &sgx_vm_ops)
 		return -EINVAL;
 
 	*vma = result;