1 files changed, 10 insertions, 0 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 87302a49067b..ad725213f568 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2488,6 +2488,16 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
                 if (rc)
                         return rc;
         }
+        if (!vma->vm_file && (prot & PROT_EXEC) &&
+                vma->vm_start <= vma->vm_mm->start_stack &&
+                vma->vm_end >= vma->vm_mm->start_stack) {
+                /* Attempt to make the process stack executable.
+                 * This has an additional execstack check.
+                 */
+                rc = task_has_perm(current, current, PROCESS__EXECSTACK);
+                if (rc)
+                        return rc;
+        }
 #endif
 
         return file_map_prot_check(vma->vm_file, prot, vma->vm_flags&VM_SHARED);