From mboxrd@z Thu Jan 1 00:00:00 1970 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 00E20C4332F for ; Fri, 3 Nov 2023 07:01:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232968AbjKCHBX (ORCPT ); Fri, 3 Nov 2023 03:01:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232511AbjKCHBS (ORCPT ); Fri, 3 Nov 2023 03:01:18 -0400 Received: from mail-oi1-f199.google.com (mail-oi1-f199.google.com [209.85.167.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F6AEDC for ; Fri, 3 Nov 2023 00:01:16 -0700 (PDT) Received: by mail-oi1-f199.google.com with SMTP id 5614622812f47-3b2ef9e4c25so2445179b6e.1 for ; Fri, 03 Nov 2023 00:01:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698994875; x=1699599675; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=2Pf6X/QVoDCrIJC1ccvbr45vXSIfEd20y+c6StlXz1w=; b=n0lw5XefsWcfCp/6H0rxv5hxwitdJJFDDOInxo8n6m3gm86wuk2gViJOAmUdFrMTCc 8ih6aexYvo+yndLcvqkdsX/90XmRgDubaoYlBe0RzlCkViBvLnAgoCwSnjSREn1IHe8n 3H43C/ysmYY2kRuOCd15bcRcH9433858Or7yOj21YYPz/y1ebFiJr7WrjyIXbPPw1tNM 64oIGKkr8kHDi2vArnjByTDEUT2xA/Ww7yDWy2giURG0E26OM+dmgwTXgEvjkd1SzsaS 0tGA35gVc5E4tZEklTgTfz5kXrp5rUR1zsIu8PfY9SIyHRdbfTaIpjgxL/GgVMFKNcP5 oJgQ== X-Gm-Message-State: AOJu0YwyGVRn0q7hYPDnXOt8zu9XGSNiXW0JBdPhHaj3MM6Q7TYHFDJZ WtDLZ3ryaz5cWFCss/bYgDMY13ykzEomlY7MzyyaBwq57Q7tuuY= X-Google-Smtp-Source: AGHT+IHa1DPZy1PMgyo4iXBSletROadM3KULEP9PbbX157X5RHc312yETKff3zaX6wITG4ZWN433/L9Exh0gGAxQl3VMnG4IA4VB MIME-Version: 1.0 X-Received: by 2002:a05:6870:a2cf:b0:1e1:2f43:1dc6 with SMTP id w15-20020a056870a2cf00b001e12f431dc6mr9970572oak.1.1698994875789; Fri, 03 Nov 2023 00:01:15 -0700 (PDT) Date: Fri, 03 Nov 2023 00:01:15 -0700 In-Reply-To: <000000000000e69b5a06093287ec@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000bf71206093a1245@google.com> Subject: Re: [syzbot] test uaf in hci_conn_drop From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: test uaf in hci_conn_drop Author: lizhi.xu@windriver.com #syz test git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git 8de1e7afcc1c diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c index 15b33579007c..3c6592da21c4 100644 --- a/net/bluetooth/hci_sysfs.c +++ b/net/bluetooth/hci_sysfs.c @@ -6,6 +6,8 @@ #include #include +static void sco_set_hci_cnn_null(struct hci_conn * conn); + static const struct class bt_class = { .name = "bluetooth", }; @@ -13,6 +15,7 @@ static const struct class bt_class = { static void bt_link_release(struct device *dev) { struct hci_conn *conn = to_hci_conn(dev); + sco_set_hci_cnn_null(conn); kfree(conn); } diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index c736186aba26..739956cfc26b 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -76,6 +76,12 @@ struct sco_pinfo { #define SCO_CONN_TIMEOUT (HZ * 40) #define SCO_DISCONN_TIMEOUT (HZ * 2) +static void sco_set_hci_cnn_null(struct hci_conn * conn) +{ + struct sco_conn * scn = container_of(conn, struct sco_conn, hcon); + scn->hci_conn = NULL; +} + static void sco_sock_timeout(struct work_struct *work) { struct sco_conn *conn = container_of(work, struct sco_conn,