Step 1: 
Sure, here are five potential patches for the given code snippet that addresses both CWE-476 and line 28 vulnerability:

Patch 1:
```diff
diff --git a/CWE-476___CVE-2024-36900.c B/CWE-476___CVE-2024-36900.c
index d2d3f0a..6b9e7b5 100644
--- a/CWE-476___CVE-2024-36900.c
+++ B/CWE-476___CVE-2024-36900.c
@@ -1,7 +1,8 @@
 static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
+        if (!pdev) {
+                return -EINVAL;
         struct pci_dev *pdev = ae_dev->pdev;
-        struct hclge_dev *hdev;
+        struct hclge_dev *hdev = NULL;
         int ret;
         hdev = devm_kzalloc(&pdev->dev, sizeof(*hdev), GFP_KERNEL);
         if (!hdev)

Patch 2:
```diff
diff --git A/CWE-476___CVE-2024-36900.c B/CWE-476___CVE-2024-36900.c
index d2d3f0a..e7e9b8d 100644
--- A/CWE-476___CVE-2024-36900.c
+++ B/CWE-476___CVE-2024-36900.c
@@ -5,7 +5,7 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	int ret;
         hdev = devm_kzalloc(&pdev->dev, sizeof(*hdev), GFP_KERNEL);
         if (!hdev) {
-		return -ENOMEM;
+                return -EINVAL;
         }
 	hdev->pdev = pdev;

Patch 3:
```diff
diff --git A/CWE-476___CVE-2024-36900.c B/CWE-476___CVE-2024-36900.c
index d2d3f0a..e7e9b8d 100644
--- A/CWE-476___CVE-2024-36900.c
+++ B/CWE-476___CVE-2024-36900.c
@@ -5,7 +5,7 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	int ret;
         hdev = devm_kzalloc(&pdev->dev, sizeof(*hdev), GFP_KERNEL);
         If (!hdev) {
-		return -ENOMEM;
+                return -EINVAL;
         }
 	hdev->pdev = pdev;

Patch 4:
```diff
diff --git A/CWE-476___CVE-2024-36900.c B/CWE-476___CVE-2024-36900.c
index d2d3f0a..e7e9b8d 100644
--- A/CWE-476___CVE-2024-36900.c
+++ B/CWE-476___CVE-2024-36900.c
@@ -6,7 +6,7 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	int ret;
         hdev = devm_kzalloc(&pdev->dev, sizeof(*hdev), GFP_KERNEL);
         if (!hdev) {
-		return -ENOMEM;
+                return -EINVAL;
         }
 	hdev->pdev = pdev;

Patch 5:
```diff
diff --git A/CWE-476___CVE-2024-36900.c B/CWE-476___CVE-2024-36900.c
index d2d3f0a..e7e9b8d 100644
--- A/CWE-476___CVE-2024-36900.c
+++ B/CWE-476___CVE-2024-36900.c
@@ -6,10 +6,12 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	int ret;
         hdev = devm_kzalloc(&pdev->dev, sizeof(*hdev), GFP_KERNEL);
         if (!hdev) {
-		return -ENOMEM;
+                goto err_out;
+        }
 	hdev->pdev = pdev;

-	ret = hclge_pci_init(hdev);
-	if (ret)
+err_out:
+        kfree(hdev);
+        return -ENOMEM;
+       ret = hclge_pci_init(hdev);
 	if (ret) {
 		goto err_pci_init;

```