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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 98982C64981 for ; Thu, 15 Jul 2021 19:08:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8CBD5613D3 for ; Thu, 15 Jul 2021 19:08:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244077AbhGOTKh (ORCPT ); Thu, 15 Jul 2021 15:10:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:37350 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243165AbhGOTAO (ORCPT ); Thu, 15 Jul 2021 15:00:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EA616601FE; Thu, 15 Jul 2021 18:57:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626375440; bh=iNcNQir2cRVMu562KVKOKY2dPsh8LJRdvfF8o5bwC1Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FsidDSlBfvGgsDhRVY5EcljLpeuZ4w1voxTIgQM1ZuLea9nFsCMrYSJUaJh2hxGEw CUXoab2ToIeNUd+on649u1fmLU8fYkMoYsmU6ROytEyIR6FEhcmPZiYyV+A9FQ7YB2 fK2WLGAhTa+DV7h2Z6NH3UVmGW2VvA8m03PlQwpI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lee Gibson , Kalle Valo , Sasha Levin Subject: [PATCH 5.12 088/242] wl1251: Fix possible buffer overflow in wl1251_cmd_scan Date: Thu, 15 Jul 2021 20:37:30 +0200 Message-Id: <20210715182608.532399056@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210715182551.731989182@linuxfoundation.org> References: <20210715182551.731989182@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lee Gibson [ Upstream commit d10a87a3535cce2b890897914f5d0d83df669c63 ] Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size. Signed-off-by: Lee Gibson Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20210428115508.25624-1-leegib@gmail.com Signed-off-by: Sasha Levin --- drivers/net/wireless/ti/wl1251/cmd.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/ti/wl1251/cmd.c b/drivers/net/wireless/ti/wl1251/cmd.c index 498c8db2eb48..d7a869106782 100644 --- a/drivers/net/wireless/ti/wl1251/cmd.c +++ b/drivers/net/wireless/ti/wl1251/cmd.c @@ -454,9 +454,12 @@ int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len, cmd->channels[i].channel = channels[i]->hw_value; } - cmd->params.ssid_len = ssid_len; - if (ssid) - memcpy(cmd->params.ssid, ssid, ssid_len); + if (ssid) { + int len = clamp_val(ssid_len, 0, IEEE80211_MAX_SSID_LEN); + + cmd->params.ssid_len = len; + memcpy(cmd->params.ssid, ssid, len); + } ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd)); if (ret < 0) { -- 2.30.2