From patchwork Fri Feb 10 04:10:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zheng Wang X-Patchwork-Id: 652496 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E78F9C636CD for ; Fri, 10 Feb 2023 04:11:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231241AbjBJEL3 (ORCPT ); Thu, 9 Feb 2023 23:11:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230262AbjBJEL0 (ORCPT ); Thu, 9 Feb 2023 23:11:26 -0500 Received: from m12.mail.163.com (m12.mail.163.com [123.126.96.234]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 138E08A5E; Thu, 9 Feb 2023 20:11:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=oGikc NFZc3el4R4e5AyREsNxJCPuWtBQAXD7oOnxock=; b=n3l44jrqs7cmBamNxL3+B qz0YihQC74inQu5cPZ0cYhj/UesFBgdV09BAYdfDTtzl6rXIB8iflL2zi5nH2aaG fX/67H4MqYjbjjMVVbyvHB06+EahnHdCIezXVd1pFCtIW5dMst4q269Sh42EuRjt rnZWLYVv/AGLD3mxb8Kpxo= Received: from leanderwang-LC2.localdomain (unknown [111.206.145.21]) by smtp20 (Coremail) with SMTP id H91pCgC3gba3w+VjdWhCDg--.52843S2; Fri, 10 Feb 2023 12:10:32 +0800 (CST) From: Zheng Wang To: marcel@holtmann.org Cc: hackerzheng666@gmail.com, alex000young@gmail.com, johan.hedberg@gmail.com, luiz.dentz@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Zheng Wang Subject: [PATCH] Bluetooth: hci_core: Fix poential Use-after-Free bug in hci_remove_adv_monitor Date: Fri, 10 Feb 2023 12:10:30 +0800 Message-Id: <20230210041030.865478-1-zyytlz.wz@163.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: H91pCgC3gba3w+VjdWhCDg--.52843S2 X-Coremail-Antispam: 1Uf129KBjvdXoWrZw47GF47trWxWw4UGF43trb_yoWfuFbE9r 1xAryfWr4UGF15AF47ZFW5Zr1Utw1rZF4fta4fXFWYq34qgwnxtr1IvwnxZFyxuw4qyry3 AanxW34Y9w15tjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRKBT5JUUUUU== X-Originating-IP: [111.206.145.21] X-CM-SenderInfo: h2113zf2oz6qqrwthudrp/1tbiXBgSU1Xl5kpygQAAsq Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org In hci_remove_adv_monitor, if it gets into HCI_ADV_MONITOR_EXT_MSFT case, the function will free the monitor and print its handle after that. Fix it by switch the order. Fixes: 7cf5c2978f23 ("Bluetooth: hci_sync: Refactor remove Adv Monitor") Signed-off-by: Zheng Wang --- net/bluetooth/hci_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index b65c3aabcd53..db3352c60de6 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -1980,9 +1980,9 @@ static int hci_remove_adv_monitor(struct hci_dev *hdev, goto free_monitor; case HCI_ADV_MONITOR_EXT_MSFT: - status = msft_remove_monitor(hdev, monitor); bt_dev_dbg(hdev, "%s remove monitor %d msft status %d", hdev->name, monitor->handle, status); + status = msft_remove_monitor(hdev, monitor); break; }