From patchwork Tue Oct 27 13:52:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 311833 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 C9015C63699 for ; Tue, 27 Oct 2020 18:00:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9BE982224E for ; Tue, 27 Oct 2020 18:00:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603821659; bh=qoxfoP8ZLOQMt7YnGaUYMpup0kxZCvGPlgrVj1ztdIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=lrChfY29aSZLsCWhx7zZ/1L/wz6C9orWzg6Yua0AlfTKXKZFshjfQ3Cf+AlFqMHiB 3Wyu1gwf4H2aDW+/HNMMaDf5/1n+6PvUDGHI8eG9ASA2MdyQVzLLzjQnlMrNUeUBVB jMHDL1K1e6ZKQmWYVOfy1LSERcj2AYhgs60QnWd4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1823025AbgJ0R4w (ORCPT ); Tue, 27 Oct 2020 13:56:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:45302 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2901187AbgJ0OVH (ORCPT ); Tue, 27 Oct 2020 10:21:07 -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 6C7A3206F7; Tue, 27 Oct 2020 14:21:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603808466; bh=qoxfoP8ZLOQMt7YnGaUYMpup0kxZCvGPlgrVj1ztdIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ghdZmWiAV7EDk0xEkpq46fGijJK5dpctXv11IKdH05hHhb4nc+Spr8rXuSIrA855z 0IMrOVfbpTYrcsi1VtrO7IyYKNnd9a2BdG5RD7hyIuqUuJlxdNm8HDJfbcHTJn+SyQ 7QGUYtZQR39n2Q5hziHDeTXh0qIVER5aSybBX1Ho= 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 4.19 102/264] ath6kl: wmi: prevent a shift wrapping bug in ath6kl_wmi_delete_pstream_cmd() Date: Tue, 27 Oct 2020 14:52:40 +0100 Message-Id: <20201027135435.481742549@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135430.632029009@linuxfoundation.org> References: <20201027135430.632029009@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 bc7916f2add09..987ebae8ea0e1 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;