linux-kernel - Re: [syzbot] [bluetooth?] INFO: task hung in hci_conn

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Message-ID: <tencent_4A66EF6ACD6878526F542C2D6D109794E80A@qq.com>
Date: Sun, 28 Jan 2024 09:31:18 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+a984066a63e9c1e62662@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] INFO: task hung in hci_conn_failed

please test task hung in hci_conn_failed

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

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index a6fc8a2a5c67..2cc194ad37ba 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -5338,7 +5338,7 @@ int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
 
 	/* Check if the connection has been cleaned up concurrently */
 	c = hci_conn_hash_lookup_handle(hdev, handle);
-	if (!c || c != conn) {
+	if (!c || c != conn || conn->state == BT_CLOSED) {
 		err = 0;
 		goto unlock;
 	}