Based on the provided code and the specified vulnerability (CWE-401: ) around line 19, here are five possible patches to address the issue:

Patch 1:
```
18 	ret = create_gpadl_header(type, kbuffer, size, send_offset, &msginfo);
19 	if (ret) {
20 		kfree(msginfo);
21 		return ret;
22 	}
```

Patch 2:
```
18 	ret = create_gpadl_header(type, kbuffer, size, send_offset, &msginfo);
19 	if (ret) {
20 		if (msginfo) {
21 			kfree(msginfo);
22 		}
23 		return ret;
24 	}
```

Patch 3:
```
18 	ret = create_gpadl_header(type, kbuffer, size, send_offset, &msginfo);
19 	if (ret || !msginfo) {
20 		return ret;
21 	}
```

Patch 4:
```
18 	ret = create_gpadl_header(type, kbuffer, size, send_offset, &msginfo);
19 	if (ret) {
20 		goto cleanup;
21 	}
```

Patch 5:
```
18 	ret = create_gpadl_header(type, kbuffer, size, send_offset, &msginfo);
19 	if (ret) {
20 		dev_err(&channel->device_obj->device, "Failed to create GPADL header\n");
21 		return ret;
22 	}
```

These patches aim to properly handle the case where create_gpadl_header() fails, ensuring that any allocated resources are freed and preventing potential use-after-free issues.