1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c
index e0acc11d29ba..641cb7e05a47 100644
--- a/drivers/ntb/test/ntb_tool.c
+++ b/drivers/ntb/test/ntb_tool.c
@@ -370,16 +370,9 @@ static ssize_t tool_fn_write(struct tool_ctx *tc,
 	if (*offp)
 		return 0;
 
-	buf = kmalloc(size + 1, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	if (copy_from_user(buf, ubuf, size)) {
-		kfree(buf);
-		return -EFAULT;
-	}
-
-	buf[size] = 0;
+	buf = memdup_user_nul(ubuf, size);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
 
 	n = sscanf(buf, "%c %lli", &cmd, &bits);