Step 1: 
CWE-125___CVE-2024-36931.c___1-41___14.c_vul.c

```diff
diff --git a/CWE-125___CVE-2024-36931.c___1-41___14.c B/CWE-125___CVE-2024-36931.c___1-41___14.c
--- A/CWE-125___CVE-2024-36931.c___1-41___14.c
+++ B/CWE-125___CVE-2024-36931.c___1-41___14.c
@@ -7,6 +7,8 @@ static ssize_t crw_inject_write(struct file *file, const char __user *buf,
 	ssize_t ret;

 	if (!static_branch_likely(&cio_inject_enabled)) {
+		if (lbuf > PAGE_SIZE) {
+			return -EINVAL; // Return error for large input buffer
+		}
 		buffer = vmemdup_user(buf, lbuf);
```

Step 2.

```diff
diff --git A/CWE-125___CVE-2024-36931.c___1-41___14.c B/CWE-125___CVE-2024-36931.c___1-41___14.c
--- A/CWE-125___CVE-2024-36931.c___1-41___14.c
+++ B/CWE-125___CVE-2024-36931.c___1-41___14.c
@@ -9,6 +9,10 @@ static ssize_t crw_inject_write(struct file *file, const char __user *buf,
 	if (!static_branch_likely(&cio_inject_enabled)) {
 		buffer = vmemdup_user(buf, lbuf);
 		if (IS_ERR(buffer))
+			return PTR_ERR(buffer); // Return error if memory allocation fails
+
+		if (lbuf > PAGE_SIZE) {
+			kfree(buffer); // Free allocated buffer on error
 	} else {

```