1 files changed, 25 insertions, 3 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index b5220a266dce..5e755a3f4cae 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -68,6 +68,7 @@
 #include <linux/personality.h>
 #include <linux/sysctl.h>
 #include <linux/audit.h>
+#include <linux/string.h>
 
 #include "avc.h"
 #include "objsec.h"
@@ -1658,9 +1659,8 @@ static int selinux_bprm_secureexec (struct linux_binprm *bprm)
 
 static void selinux_bprm_free_security(struct linux_binprm *bprm)
 {
-        struct bprm_security_struct *bsec = bprm->security;
+        kfree(bprm->security);
         bprm->security = NULL;
-        kfree(bsec);
 }
 
 extern struct vfsmount *selinuxfs_mount;
@@ -1944,7 +1944,8 @@ static int selinux_sb_copy_data(struct file_system_type *type, void *orig, void
                 }
         } while (*in_end++);
 
-        copy_page(in_save, nosec_save);
+        strcpy(in_save, nosec_save);
+        free_page((unsigned long)nosec_save);
 out:
         return rc;
 }
@@ -2476,6 +2477,17 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
                 prot = reqprot;
 
 #ifndef CONFIG_PPC32
+        if ((prot & PROT_EXEC) && !(vma->vm_flags & VM_EXECUTABLE) &&
+           (vma->vm_start >= vma->vm_mm->start_brk &&
+            vma->vm_end <= vma->vm_mm->brk)) {
+                /*
+                 * We are making an executable mapping in the brk region.
+                 * This has an additional execheap check.
+                 */
+                rc = task_has_perm(current, current, PROCESS__EXECHEAP);
+                if (rc)
+                        return rc;
+        }
         if (vma->vm_file != NULL && vma->anon_vma != NULL && (prot & PROT_EXEC)) {
                 /*
                  * We are making executable a file mapping that has
@@ -2487,6 +2499,16 @@ 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);