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

Liam Howlett
2021-05-10T17:01:43Z

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 <Liam.Howlett@Oracle.com>
---
arch/x86/kernel/cpu/sgx/encl.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

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;
--
2.30.2