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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tencent_4106CD52CA064549A46EC9AED94CB027D006@qq.com>
Date: Thu,  4 Dec 2025 09:03:04 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+3609b9b48e68e1fe47fd@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in hci_conn_drop (3)

#syz test

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index a9f5b1a68356..cbbb1ad3e78a 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -329,9 +329,11 @@ static void hci_cmd_sync_work(struct work_struct *work)
 			int err;
 
 			hci_req_sync_lock(hdev);
+			hci_dev_lock(hdev);
 			err = entry->func(hdev, entry->data);
 			if (entry->destroy)
 				entry->destroy(hdev, entry->data, err);
+			hci_dev_unlock(hdev);
 			hci_req_sync_unlock(hdev);
 		}