linux-kernel - Forwarded: [PATCH] Bluetooth: hci_conn: Fix memory leak in tx

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Message-ID: <695f7155.050a0220.1c677c.038e.GAE@google.com>
Date: Thu, 08 Jan 2026 00:56:53 -0800
From: syzbot <syzbot+6e76aa21aaf2d8be6034@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Forwarded: [PATCH] Bluetooth: hci_conn: Fix memory leak in tx_q on
 connection teardown

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com.

***

Subject: [PATCH] Bluetooth: hci_conn: Fix memory leak in tx_q on connection teardown
Author: kartikey406@...il.com

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

Cloned SKBs queued in conn->tx_q.queue for TX timestamp tracking are
not freed if the connection is torn down before all completion events
arrive. Add skb_queue_purge() in hci_conn_cleanup() to fix the leak.

Reported-by: syzbot+6e76aa21aaf2d8be6034@...kaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=6e76aa21aaf2d8be6034
Signed-off-by: Deepanshu Kartikey <kartikey406@...il.com>
---
 net/bluetooth/hci_conn.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index c3f7828bf9d5..3fb93faf60f3 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -148,6 +148,7 @@ static void hci_conn_cleanup(struct hci_conn *conn)
 		hci_remove_link_key(hdev, &conn->dst);
 
 	hci_chan_list_flush(conn);
+	skb_queue_purge(&conn->tx_q.queue);
 
 	if (HCI_CONN_HANDLE_UNSET(conn->handle))
 		ida_free(&hdev->unset_handle_ida, conn->handle);
-- 
2.43.0