X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=arch%2Fhexagon%2Finclude%2Fasm%2Fuaccess.h;h=f61cfb28e9f283800f968c2953705851da429e68;hb=f76d9c61d91343806e59335493806e87daf78947;hp=f000a382bc7f62f28dfe980ab184904c70681914;hpb=2d28b633c3fa8f53b919a5de86eb1c8e78dde818;p=deliverable%2Flinux.git

diff --git a/arch/hexagon/include/asm/uaccess.h b/arch/hexagon/include/asm/uaccess.h
index f000a382bc7f..f61cfb28e9f2 100644
--- a/arch/hexagon/include/asm/uaccess.h
+++ b/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);