dpll: Fix potential msg memleak when genlmsg_put_reply failed

We should clean the skb resource if genlmsg_put_reply failed.

Fixes: 9d71b54 ("dpll: netlink: Add DPLL framework base functions")
Signed-off-by: Hao Ge <[email protected]>
Reviewed-by: Vadim Fedorenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: GeHao01994

drivers/dpll/dpll_netlink.c

@@ -1093,9 +1093,10 @@ int dpll_nl_pin_id_get_doit(struct sk_buff *skb, struct genl_info *info)
 		return -ENOMEM;
 	hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
 				DPLL_CMD_PIN_ID_GET);
-	if (!hdr)
+	if (!hdr) {
+		nlmsg_free(msg);
 		return -EMSGSIZE;
-
+	}
 	pin = dpll_pin_find_from_nlattr(info);
 	if (!IS_ERR(pin)) {
 		ret = dpll_msg_add_pin_handle(msg, pin);
@@ -1123,8 +1124,10 @@ int dpll_nl_pin_get_doit(struct sk_buff *skb, struct genl_info *info)
 		return -ENOMEM;
 	hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
 				DPLL_CMD_PIN_GET);
-	if (!hdr)
+	if (!hdr) {
+		nlmsg_free(msg);
 		return -EMSGSIZE;
+	}
 	ret = dpll_cmd_pin_get_one(msg, pin, info->extack);
 	if (ret) {
 		nlmsg_free(msg);
@@ -1256,8 +1259,10 @@ int dpll_nl_device_id_get_doit(struct sk_buff *skb, struct genl_info *info)
 		return -ENOMEM;
 	hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
 				DPLL_CMD_DEVICE_ID_GET);
-	if (!hdr)
+	if (!hdr) {
+		nlmsg_free(msg);
 		return -EMSGSIZE;
+	}
 
 	dpll = dpll_device_find_from_nlattr(info);
 	if (!IS_ERR(dpll)) {
@@ -1284,8 +1289,10 @@ int dpll_nl_device_get_doit(struct sk_buff *skb, struct genl_info *info)
 		return -ENOMEM;
 	hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
 				DPLL_CMD_DEVICE_GET);
-	if (!hdr)
+	if (!hdr) {
+		nlmsg_free(msg);
 		return -EMSGSIZE;
+	}
 
 	ret = dpll_device_get_one(dpll, msg, info->extack);
 	if (ret) {