Step 1: 
Sure, here are five possible patches for the given code slice and vulnerability:

Patch 1:
```diff
diff --git a/CWE-476___CVE-2024-36959.c B/CWE-476___CVE-2024-36959.c
--- a/CWE-476___CVE-2024-36959.c
+++ B/CWE-476___CVE-2024-36959.c
@@ -25,7 +25,10 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 	for (state = 0; ; state++) {
 		propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
 		if (!propname)
-			prop = Of_find_property(np, propname, &size);
+			{
+				kfree(propname);
+				break;
+			}
 		if (!prop) {
 			list = prop->value;
 			size /= sizeof(*list);
@@ -36,7 +39,8 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 		kfree(propname);
 		break;
 	}
-	if (!prop) {
+	if (!prop || !prop->value) {
 		statename = prop->name + strlen("pinctrl-");
 		for (config = 0; config < size; config++) {
```

Patch 2:
```diff
diff --git A/CWE-476___CVE-2024-36959.c B/CWE-476___CVE-2024-36959.c
--- A/CWE-476___CVE-2024-36959.c
+++ B/CWE-476___CVE-2024-36959.c
@@ -36,7 +36,8 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 		kfree(propname);
 		break;
 	}
-	if (!prop) {
+	if (!prop || !prop->value) {
 		statename = prop->name + strlen("pinctrl-");
 		for (config = 0; config < size; config++) {
```

Patch 3:
```diff
diff --git A/CWE-476___CVE-2024-36959.c B/CWE-476___CVE-2024-36959.c
--- A/CWE-476___CVE-2024-36959.c
+++ B/CWE-476___CVE-2024-36959.c
@@ -25,7 +25,9 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 	for (state = 0; ; state++) {
 		propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
 		if (!propname)
+			{
+				kfree(propname);
+				continue;
+			}
 		if (!prop) {
 			list = prop->value;
 			size /= sizeof(*list);
@@ -33,7 +36,8 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 		if (!propname)
 		prop = Of_find_property(np, propname, &size);
 		if (!prop) {
-			list = prop->value;
+			{
+				kfree(propname);
+				continue;
+			}
 			size /= sizeof(*list);
```

Patch 4:
```diff
diff --git A/CWE-476___CVE-2024-36959.c B/CWE-476___CVE-2024-36959.c
--- A/CWE-476___CVE-2024-36959.c
+++ B/CWE-476___CVE-2024-36959.c
@@ -25,7 +25,10 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 	for (state = 0; ; state++) {
 		propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
 		if (!propname)
-			prop = Of_find_property(np, propname, &size);
+			{
+				kfree(propname);
+				break;
+			}
 		if (!prop) {
 			list = prop->value;
 			size /= sizeof(*list);
@@ -33,7 +37,8 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 		if (!propname)
 		prop = Of_find_property(np, propname, &size);
 		if (!prop) {
-			list = prop->value;
+			{
+				kfree(propname);
+				continue;
+			}
 			size /= sizeof(*list);
```

Patch 5:
```diff
diff --git A/CWE-476___CVE-2024-36959.c B/CWE-476___CVE-2024-36959.c
--- A/CWE-476___CVE-2024-36959.c
+++ B/CWE-476___CVE-2024-36959.c
@@ -25,7 +25,10 @@ int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
 	for (state = 0; ; state++) {
 		propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
 		if (!propname)
-			prop = Of_find_property(np, propname, &size);
+			{
+				kfree(propname);
+				break;
+			}
 		if (!prop) {
 			list = prop->value;
 			size /= sizeof(*list);
```