1 files changed, 3 insertions, 8 deletions

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index e3952e9c8ec0..fe42b6ec3f0c 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -657,14 +657,9 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
                 pr_warn("expected <%d bytes into control\n", USER_BUF_PAGE);
                 return -E2BIG;
         }
-        tmpbuf = kmalloc(len + 1, GFP_KERNEL);
-        if (!tmpbuf)
-                return -ENOMEM;
-        if (copy_from_user(tmpbuf, ubuf, len)) {
-                kfree(tmpbuf);
-                return -EFAULT;
-        }
-        tmpbuf[len] = '\0';
+        tmpbuf = memdup_user_nul(ubuf, len);
+        if (IS_ERR(tmpbuf))
+                return PTR_ERR(tmpbuf);
         vpr_info("read %d bytes from userspace\n", (int)len);
 
         ret = ddebug_exec_queries(tmpbuf, NULL);