linux-kernel - Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in mgmt_pending

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Message-ID: <tencent_2E03CFCC0DBB25D10DB89200DD9E5DD71907@qq.com>
Date: Sun, 16 Nov 2025 16:29:24 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+9aa47cd4633a3cf92a80@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in mgmt_pending_remove

#syz test

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index fc866759910d..ad19022ae127 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -1311,7 +1311,9 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
 			goto done;
 		}
 
+		hci_dev_lock(hdev);
 		mgmt_index_removed(hdev);
+		hci_dev_unlock(hdev);
 
 		err = hci_dev_open(hdev->id);
 		if (err) {