1 files changed, 2 insertions, 4 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index ccdfbb16c86d..b373322ca497 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1478,9 +1478,7 @@ static int unshare_vm(unsigned long unshare_flags, struct mm_struct **new_mmp)
 
         if ((unshare_flags & CLONE_VM) &&
             (mm && atomic_read(&mm->mm_users) > 1)) {
-                *new_mmp = dup_mm(current);
-                if (!*new_mmp)
-                        return -ENOMEM;
+                return -EINVAL;
         }
 
         return 0;
@@ -1569,7 +1567,7 @@ asmlinkage long sys_unshare(unsigned long unshare_flags)
 
                 if (new_sigh) {
                         sigh = current->sighand;
-                        current->sighand = new_sigh;
+                        rcu_assign_pointer(current->sighand, new_sigh);
                         new_sigh = sigh;
                 }