afs: Provide a splice-read wrapper

[linux-block.git] / mm / gup.c

diff --git a/mm/gup.c b/mm/gup.c
index ff689c88a35781f1d9aeccd00458028a308cdb42..bbe4162365933e5d52f84c34037cb7d0949bc64d 100644 (file)
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -2970,6 +2970,8 @@ static int internal_get_user_pages_fast(unsigned long start,
        len = nr_pages << PAGE_SHIFT;
        if (check_add_overflow(start, len, &end))
                return 0;
+       if (end > TASK_SIZE_MAX)
+               return -EFAULT;
        if (unlikely(!access_ok((void __user *)start, len)))
                return -EFAULT;