From patchwork Tue Oct 27 13:48:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 311750 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECC5FC55179 for ; Tue, 27 Oct 2020 18:19:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A57AF207E8 for ; Tue, 27 Oct 2020 18:19:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603822765; bh=f4YZVHOnGeB8cfdsL5YN2dHUcL5Q42ZvKZ/bAevmYA4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tzksK4ZBUHta/lwWYEjO0qXAeTXMV/nA3UJny5L2HpLy/NSY2WK8V0PyU+gpUWClr ssrYge/TeDjR+m0RawU6d6hkiL5gWgSm4bs+uWJfkC6EJC7U9z6WVBhtuWDidfwzjR 4bGpVTyTVTkoSABZGaMh0vVTxs7dO4Nr+6L95WX4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2504581AbgJ0ODm (ORCPT ); Tue, 27 Oct 2020 10:03:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:51690 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753991AbgJ0ODa (ORCPT ); Tue, 27 Oct 2020 10:03:30 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B760022281; Tue, 27 Oct 2020 14:03:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807409; bh=f4YZVHOnGeB8cfdsL5YN2dHUcL5Q42ZvKZ/bAevmYA4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hUf+/fb6YIYQaRNxoJp+fM1XJAawSqGS0f81EmRQLMNNKYtZRa6MEaJZ+GXK6SqRV qZCvinDIKON+vWVaksOhQ2BJQKQKKhGcBIS53YrogMhRQlnw1CRVDS3X6WDcWwAOjZ XkPliJG8o3v+f8Ukl3LRes9Cq1New8v37R6LPdlw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Kalle Valo , Sasha Levin Subject: [PATCH 4.9 043/139] ath6kl: wmi: prevent a shift wrapping bug in ath6kl_wmi_delete_pstream_cmd() Date: Tue, 27 Oct 2020 14:48:57 +0100 Message-Id: <20201027134904.182319621@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027134902.130312227@linuxfoundation.org> References: <20201027134902.130312227@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dan Carpenter [ Upstream commit 6a950755cec1a90ddaaff3e4acb5333617441c32 ] The "tsid" is a user controlled u8 which comes from debugfs. Values more than 15 are invalid because "active_tsids" is a 16 bit variable. If the value of "tsid" is more than 31 then that leads to a shift wrapping bug. Fixes: 8fffd9e5ec9e ("ath6kl: Implement support for QOS-enable and QOS-disable from userspace") Signed-off-by: Dan Carpenter Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200918142732.GA909725@mwanda Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath6kl/wmi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c index 55609fc4e50e6..73eab12cb3bda 100644 --- a/drivers/net/wireless/ath/ath6kl/wmi.c +++ b/drivers/net/wireless/ath/ath6kl/wmi.c @@ -2648,6 +2648,11 @@ int ath6kl_wmi_delete_pstream_cmd(struct wmi *wmi, u8 if_idx, u8 traffic_class, return -EINVAL; } + if (tsid >= 16) { + ath6kl_err("invalid tsid: %d\n", tsid); + return -EINVAL; + } + skb = ath6kl_wmi_get_new_buf(sizeof(*cmd)); if (!skb) return -ENOMEM;