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 7CB9EC61D99 for ; Thu, 23 Nov 2023 02:06:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344164AbjKWCGX (ORCPT ); Wed, 22 Nov 2023 21:06:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229789AbjKWCGR (ORCPT ); Wed, 22 Nov 2023 21:06:17 -0500 Received: from mail-pl1-f199.google.com (mail-pl1-f199.google.com [209.85.214.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4F2AA3 for ; Wed, 22 Nov 2023 18:06:23 -0800 (PST) Received: by mail-pl1-f199.google.com with SMTP id d9443c01a7336-1ccdf149e60so4020265ad.0 for ; Wed, 22 Nov 2023 18:06:23 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700705183; x=1701309983; 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=4amVbv3Q09Okt69QNEidmRw6msqxlnAWNcQv8Svc/2E=; b=kjzbEGgrezsQeVOgfV+1ZiEfBs6Mw7cKXg4+MWKIlFMpAk98vWMpGQ0nR3cK2Kl422 zn1XOZna95PeJwXbOFaNeTEETSqZhkmdIFdSoxF1O0OwLo6UolU2rZOa4GkBT5IuT0EQ +JM09V0cgM+nqSw83XN14XXHJ4MbPNZ0ZHoZRZ4d2MxqkyXzm420USH11widrImXquFl c4hT/C4zQftNR4NlA3fRoqKXMZ+IfZOj2o7YWsI/qN7y63ZDmaKRXrrioWW+YIOxkYCJ ddHq6VpEY5l1QurSri2OKPmZWOkjrFYhfquBS6GgOw0d7DQ4Vp2Czroths5SQpzz5bc4 Po+A== X-Gm-Message-State: AOJu0YyyBzpQE02N23vjrjxj7Gn22KGOIr3tRWWW07LneH54cFNCwddU kWc53aobBAsTaWeUkcPKLDqgLi738tbkhOVezSC7BDZTKDptllY= X-Google-Smtp-Source: AGHT+IFBeQUymVU8ZfXPZ8tI0pBKrUTOZ+HTapAbaNgBGY2fKEiRYynqmX351tQ8H5SYT1J+bGrsgyWdOuxuvvX5HXVz5n5k/1Rp MIME-Version: 1.0 X-Received: by 2002:a17:902:ced1:b0:1cf:6910:3b8c with SMTP id d17-20020a170902ced100b001cf69103b8cmr1014626plg.8.1700705183518; Wed, 22 Nov 2023 18:06:23 -0800 (PST) Date: Wed, 22 Nov 2023 18:06:23 -0800 In-Reply-To: <0000000000007b84a2060ac7d84b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000054dd20060ac84858@google.com> Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in __lock_sock 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: [bluetooth?] KASAN: slab-use-after-free Read in __lock_sock Author: eadavis@qq.com please test uaf in __lock_sock #syz test https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git 8de1e7afcc1c diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index c736186aba26..82e50c215386 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -270,6 +270,7 @@ static int sco_connect(struct sock *sk) goto unlock; } + hci_conn_get(hcon); conn = sco_conn_add(hcon); if (!conn) { hci_conn_drop(hcon); @@ -438,12 +439,13 @@ static void __sco_sock_close(struct sock *sk) case BT_CONNECTED: case BT_CONFIG: if (sco_pi(sk)->conn->hcon) { + struct hci_conn *hcon = sco_pi(sk)->conn->hcon; sk->sk_state = BT_DISCONN; sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); sco_conn_lock(sco_pi(sk)->conn); - hci_conn_drop(sco_pi(sk)->conn->hcon); sco_pi(sk)->conn->hcon = NULL; sco_conn_unlock(sco_pi(sk)->conn); + hci_conn_put(hcon); } else sco_chan_del(sk, ECONNRESET); break;