1 files changed, 2 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index e5628a5fd678..717aa0e3be2d 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -989,6 +989,8 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
         int i;
         unsigned int vm_flags;
 
+        if (len <= 0)
+                return 0;
         /* 
          * Require read or write permissions.
          * If 'force' is set, we only require the "MAY" flags.