mm: untag user pointers in mm/gup.c

[platform/kernel/linux-starfive.git] / mm / gup.c

diff --git a/mm/gup.c b/mm/gup.c
index 60c3915..23a9f9c 100644 (file)
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -788,6 +788,8 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
        if (!nr_pages)
                return 0;
 
+       start = untagged_addr(start);
+
        VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET));
 
        /*
@@ -950,6 +952,8 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
        struct vm_area_struct *vma;
        vm_fault_t ret, major = 0;
 
+       address = untagged_addr(address);
+
        if (unlocked)
                fault_flags |= FAULT_FLAG_ALLOW_RETRY;