From patchwork Thu Feb 24 21:17:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 12759246 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 CF554C433F5 for ; Thu, 24 Feb 2022 21:10:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234651AbiBXVKi (ORCPT ); Thu, 24 Feb 2022 16:10:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234634AbiBXVK3 (ORCPT ); Thu, 24 Feb 2022 16:10:29 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B53B428D396; Thu, 24 Feb 2022 13:09:55 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 74E9BB829B3; Thu, 24 Feb 2022 21:09:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5B672C340E9; Thu, 24 Feb 2022 21:09:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645736993; bh=6IApdu4M+sjJDandvKx6K/9PvnrmBluI9K7FQQLLGW0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=j9KEW7lCO//9VFNx8CNNClk840VX7fW2bvpH3lUk0LAKuLf5OID86bAkMP5HAD1at wVJbn5CRNz86xwmSIjEcFCGop1vz42TxX+0DbhvQkDGQ026GS4V9WCDvno61uWJFyi lMywvmQbxrnhMA7Uzqr4OiW0OE6SA4NRArb4v3ktFPE8/GD6MnKPSS/y4Sa+2pLFZx yYEAT2+r9F/FTLRyFKzmKBO2WlnEc7Dvv7uhypvH3S66DvD0WGfdvLvmjeJ+t9CA38 0mkgANMPlYEJr5paRSTbmb9tHUgUxFVazt50P8rq+nEc1RRyRuXXGeY9XLZ2P3mfME dBjl+xQLeaDFg== Date: Thu, 24 Feb 2022 15:17:51 -0600 From: "Gustavo A. R. Silva" To: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Jeff Johnson Cc: Kalle Valo , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, linux-hardening@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH v2 6/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_aplist_event Message-ID: <1b7889828f23763c034c1558cbab9c8e2066053e.1645736204.git.gustavoars@kernel.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org Replace one-element array with flexible-array member in struct wmi_aplist_event. Also, make use of the struct_size() helper and remove unneeded variable ap_info_entry_size. This issue was found with the help of Coccinelle and audited and fixed, manually. Link: https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/79 Reviewed-by: Jeff Johnson Signed-off-by: Gustavo A. R. Silva --- Changes in v2: - Revert changes in if-statement logic: if (len < sizeof(struct wmi_aplist_event)) Link: https://lore.kernel.org/linux-hardening/3f408c80-cabf-5ba2-2014-2eb0550b73f9@quicinc.com/ - Update changelog text. - Add Reviewed-by: Jeff Johnson tag. drivers/net/wireless/ath/ath6kl/wmi.c | 5 +---- drivers/net/wireless/ath/ath6kl/wmi.h | 2 +- 2 files changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c index bdfc057c5a82..3787b9fb0075 100644 --- a/drivers/net/wireless/ath/ath6kl/wmi.c +++ b/drivers/net/wireless/ath/ath6kl/wmi.c @@ -1750,7 +1750,6 @@ static int ath6kl_wmi_snr_threshold_event_rx(struct wmi *wmi, u8 *datap, static int ath6kl_wmi_aplist_event_rx(struct wmi *wmi, u8 *datap, int len) { - u16 ap_info_entry_size; struct wmi_aplist_event *ev = (struct wmi_aplist_event *) datap; struct wmi_ap_info_v1 *ap_info_v1; u8 index; @@ -1759,14 +1758,12 @@ static int ath6kl_wmi_aplist_event_rx(struct wmi *wmi, u8 *datap, int len) ev->ap_list_ver != APLIST_VER1) return -EINVAL; - ap_info_entry_size = sizeof(struct wmi_ap_info_v1); ap_info_v1 = (struct wmi_ap_info_v1 *) ev->ap_list; ath6kl_dbg(ATH6KL_DBG_WMI, "number of APs in aplist event: %d\n", ev->num_ap); - if (len < (int) (sizeof(struct wmi_aplist_event) + - (ev->num_ap - 1) * ap_info_entry_size)) + if (len < struct_size(ev, ap_list, ev->num_ap)) return -EINVAL; /* AP list version 1 contents */ diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h index 6a7fc07cd9aa..a9732660192a 100644 --- a/drivers/net/wireless/ath/ath6kl/wmi.h +++ b/drivers/net/wireless/ath/ath6kl/wmi.h @@ -1957,7 +1957,7 @@ union wmi_ap_info { struct wmi_aplist_event { u8 ap_list_ver; u8 num_ap; - union wmi_ap_info ap_list[1]; + union wmi_ap_info ap_list[]; } __packed; /* Developer Commands */