X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=mm%2Futil.c;h=4735ea48181680405531a91ffc200b57035a5738;hb=f48009c2b34be347f5e9ecac11b75a848cc82b4d;hp=f5712e8964be8a8da2c521361dee71c123689428;hpb=ddc9b34c3b3bc063a7d9eb891ae09b8f49cfb27e;p=firefly-linux-kernel-4.4.55.git

diff --git a/mm/util.c b/mm/util.c
index f5712e8964be..4735ea481816 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -225,15 +225,10 @@ char *strndup_user(const char __user *s, long n)
 	if (length > n)
 		return ERR_PTR(-EINVAL);
 
-	p = kmalloc(length, GFP_KERNEL);
+	p = memdup_user(s, length);
 
-	if (!p)
-		return ERR_PTR(-ENOMEM);
-
-	if (copy_from_user(p, s, length)) {
-		kfree(p);
-		return ERR_PTR(-EFAULT);
-	}
+	if (IS_ERR(p))
+		return p;
 
 	p[length - 1] = '\0';