From patchwork Sun Jul 24 20:26:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ammar Faizi X-Patchwork-Id: 593269 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 C9EBEC433EF for ; Sun, 24 Jul 2022 20:32:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229739AbiGXU0e (ORCPT ); Sun, 24 Jul 2022 16:26:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229446AbiGXU0d (ORCPT ); Sun, 24 Jul 2022 16:26:33 -0400 Received: from gnuweeb.org (gnuweeb.org [51.81.211.47]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 918FCD12C; Sun, 24 Jul 2022 13:26:32 -0700 (PDT) Received: from integral2.. (unknown [125.160.99.33]) by gnuweeb.org (Postfix) with ESMTPSA id D28FB7E328; Sun, 24 Jul 2022 20:26:27 +0000 (UTC) X-GW-Data: lPqxHiMPbJw1wb7CM9QUryAGzr0yq5atzVDdxTR0iA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gnuweeb.org; s=default; t=1658694391; bh=upcwVnPzO07Kr5AImxs3CXXPqhTn+Mt/d3N1UpRAOdM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ffMt7dFWpB+2sQge4Rtn4oz/pSB/Ue+lmfVYtRnZWQUtjsW/TTBu/Tyv1cXf1YKvC E/u6GY3AhXkV0BZxLJMacwkS4MMjj1cXedFqv/QzoKU/nPR3X+TRmWZPgWNuchgyii at7SxYGtU8WxPgCDlH/KTY74dWvdv7lmzuOWO0ro5yinJivn/A8xlpDegiP17coYxk vL8NHuAxj7Ov9rLB4fEV85Cdz2hdGkDbMqumWo7OIInbYkkylqfSIE1PN5q6AotxS4 Zi5ScdOBGJq0iiQbT8It5tCgHjgvhviwVUD+SZ38Dz/lXxsbfdUyUa1fcAxrvxvzLm B3uPOrhqXI5tQ== From: Ammar Faizi To: Kalle Valo Cc: Ammar Faizi , Kalle Valo , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Dan Carpenter , Johannes Berg , Linux Wireless Mailing List , netdev Mailing List , Linux Kernel Mailing List , GNU/Weeb Mailing List , llvm@lists.linux.dev, kbuild-all@lists.01.org, kernel test robot Subject: [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()` Date: Mon, 25 Jul 2022 03:26:18 +0700 Message-Id: <20220724202452.61846-1-ammar.faizi@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <202207250332.5ud26AGE-lkp@intel.com> References: <202207250332.5ud26AGE-lkp@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user() but it forgets to change the value to be returned that came from simple_write_to_buffer() call. It results in the following warning: warning: variable 'rc' is uninitialized when used here [-Wuninitialized] return rc; ^~ Remove rc variable and just return the passed in length if the memdup_user() succeeds. Cc: Dan Carpenter Reported-by: kernel test robot Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()") Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command") Signed-off-by: Ammar Faizi Reviewed-by: Dan Carpenter --- drivers/net/wireless/ath/wil6210/debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) base-commit: 086f67ba21ede199307e78476353bda9ffef982c diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c index fe84362718de..04d1aa0e2d35 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -1010,7 +1010,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf, void *cmd; int cmdlen = len - sizeof(struct wmi_cmd_hdr); u16 cmdid; - int rc, rc1; + int rc1; if (cmdlen < 0 || *ppos != 0) return -EINVAL; @@ -1027,7 +1027,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf, wil_info(wil, "0x%04x[%d] -> %d\n", cmdid, cmdlen, rc1); - return rc; + return len; } static const struct file_operations fops_wmi = {