cxl: Fix off by one error allowing subsequent mmap page to be accessed

[firefly-linux-kernel-4.4.55.git] / drivers / misc / cxl / context.c

diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index 6236d4a1f7ad057eee4b4f2958993897917fc94b..1287148629c0d6f0b6e6066d4c883d8dfaebf9da 100644 (file)
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -113,11 +113,11 @@ static int cxl_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 
        if (ctx->afu->current_mode == CXL_MODE_DEDICATED) {
                area = ctx->afu->psn_phys;
-               if (offset > ctx->afu->adapter->ps_size)
+               if (offset >= ctx->afu->adapter->ps_size)
                        return VM_FAULT_SIGBUS;
        } else {
                area = ctx->psn_phys;
-               if (offset > ctx->psn_size)
+               if (offset >= ctx->psn_size)
                        return VM_FAULT_SIGBUS;
        }