From: Liam Howlett <liam.howlett@xxxxxxxxxx> Subject: x86/sgx: use vma_lookup() in sgx_encl_find() 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. Link: https://lkml.kernel.org/r/20210521174745.2219620-10-Liam.Howlett@xxxxxxxxxx Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Reviewed-by: Laurent Dufour <ldufour@xxxxxxxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Davidlohr Bueso <dbueso@xxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/x86/kernel/cpu/sgx/encl.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/kernel/cpu/sgx/encl.h~x86-sgx-use-vma_lookup-in-sgx_encl_find +++ a/arch/x86/kernel/cpu/sgx/encl.h @@ -91,8 +91,8 @@ static inline int sgx_encl_find(struct m { 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; _
