From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail114-241.sinamail.sina.com.cn (mail114-241.sinamail.sina.com.cn [218.30.114.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1A2B6181 for ; Sun, 8 Sep 2024 00:02:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=218.30.114.241 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725753747; cv=none; b=bpcZm7ltFKi9eMBC4P2phT8OGftVLfssd5ykj54j8CctfVil0ltqVgGtxztTWPIf9cMws6aDhAFKTQv06wT9SvqwrPO/xAtMglfWwdYxpwn7VyLcBcxhmlrXZl+pxY8NUka0kAqv+KkgoDPtrw/btw/fTVw0t3MPZtKzWTNfHmI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725753747; c=relaxed/simple; bh=+M6BdLDj3AUe+9DxS/8OlgvMvVbgyf161kYayyy1MIg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=EK5ViVci2V7SGtht41nG1SzIZGSgD5GuZLwzvMjSdkIZH/x5ifyaUKZnPWa+MsWtKiBYuVt0pPvYXHQJ3pgiT6TqqhTn+FHk02BicDAH5s0lPWo0lt8heQQcBEbQJYNnUztbsuuIidqmDPV5Cd8zgZPQnR7cHp1WSwY+hY6yQL8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; arc=none smtp.client-ip=218.30.114.241 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([113.118.65.196]) by sina.com (10.185.250.23) with ESMTP id 66DCE98100007AC2; Sun, 8 Sep 2024 08:02:11 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 9057018913218 X-SMAIL-UIID: 032757920145445C9B5DD950A011CC35-20240908-080211-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in l2cap_connect (2) Date: Sun, 8 Sep 2024 08:01:59 +0800 Message-Id: <20240908000159.2217-1-hdanton@sina.com> In-Reply-To: <0000000000004a130a0621888811@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Sat, 07 Sep 2024 07:42:26 -0700 > syzbot has found a reproducer for the following issue on: > > HEAD commit: 788220eee30d Merge tag 'pm-6.11-rc7' of git://git.kernel.o.. > git tree: upstream > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1304189f980000 #syz test --- l/net/bluetooth/l2cap_core.c +++ c/net/bluetooth/l2cap_core.c @@ -1797,6 +1797,7 @@ static void l2cap_conn_del(struct hci_co if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) cancel_delayed_work_sync(&conn->info_timer); + cancel_work_sync(&hcon->hdev->rx_work); hcon->l2cap_data = NULL; conn->hchan = NULL; l2cap_conn_put(conn); --