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From: Duoming Zhou <duoming@zju.edu.cn>
To: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
	linux-hams@vger.kernel.org,
	pabeni@redhat.com,
	kuba@kernel.org,
	edumazet@google.com,
	jreuter@yaina.de,
	davem@davemloft.net,
	dan.carpenter@linaro.org,
	Duoming Zhou <duoming@zju.edu.cn>
Subject: [PATCH net] ax25: Replace kfree() in ax25_dev_free() with ax25_dev_put()
Date: Thu, 30 May 2024 13:17:33 +0800
Message-Id: <20240530051733.11416-1-duoming@zju.edu.cn>
Precedence: bulk

The object "ax25_dev" is managed by reference counting. Thus it should
not be directly released by kfree(), replace with ax25_dev_put().

Fixes: d01ffb9eee4a ("ax25: add refcount in ax25_dev to avoid UAF bugs")
Suggested-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
---
 net/ax25/ax25_dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ax25/ax25_dev.c b/net/ax25/ax25_dev.c
index 742d7c68e7e..9efd6690b34 100644
--- a/net/ax25/ax25_dev.c
+++ b/net/ax25/ax25_dev.c
@@ -196,7 +196,7 @@ void __exit ax25_dev_free(void)
 	list_for_each_entry_safe(s, n, &ax25_dev_list, list) {
 		netdev_put(s->dev, &s->dev_tracker);
 		list_del(&s->list);
-		kfree(s);
+		ax25_dev_put(s);
 	}
 	spin_unlock_bh(&ax25_dev_lock);
 }
-- 
2.17.1