Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / arch / hexagon / include / asm / uaccess.h

diff --git a/kernel/arch/hexagon/include/asm/uaccess.h b/kernel/arch/hexagon/include/asm/uaccess.h
index f000a38..f61cfb2 100644 (file)
--- a/kernel/arch/hexagon/include/asm/uaccess.h
+++ b/kernel/arch/hexagon/include/asm/uaccess.h
@@ -103,7 +103,8 @@ static inline long hexagon_strncpy_from_user(char *dst, const char __user *src,
 {
        long res = __strnlen_user(src, n);
 
-       /* return from strnlen can't be zero -- that would be rubbish. */
+       if (unlikely(!res))
+               return -EFAULT;
 
        if (res > n) {
                copy_from_user(dst, src, n);