X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Farch%2Fhexagon%2Finclude%2Fasm%2Fuaccess.h;fp=kernel%2Farch%2Fhexagon%2Finclude%2Fasm%2Fuaccess.h;h=f61cfb28e9f283800f968c2953705851da429e68;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=f000a382bc7f62f28dfe980ab184904c70681914;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/arch/hexagon/include/asm/uaccess.h b/kernel/arch/hexagon/include/asm/uaccess.h
index f000a382b..f61cfb28e 100644
--- 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);