linux-kernel - Re: [syzbot] [bluetooth?] WARNING in hci_conn

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Date: Sun, 16 Jun 2024 18:14:53 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+b2545b087a01a7319474@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] WARNING in hci_conn_del

please test wrn

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 603c04e27c3e

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index a487f9df8145..4130d64d9a80 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -6893,6 +6893,9 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
 
 		bis = hci_conn_hash_lookup_handle(hdev, handle);
 		if (!bis) {
+                        if (handle > HCI_CONN_HANDLE_MAX)
+                               continue;
+
 			bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
 					   HCI_ROLE_SLAVE, handle);
 			if (IS_ERR(bis))