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=-18.8 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=ham 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 89562C433E6 for ; Mon, 1 Mar 2021 19:15:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 41E3164E54 for ; Mon, 1 Mar 2021 19:15:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240906AbhCATOZ (ORCPT ); Mon, 1 Mar 2021 14:14:25 -0500 Received: from mail.kernel.org ([198.145.29.99]:39780 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235206AbhCATJf (ORCPT ); Mon, 1 Mar 2021 14:09:35 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id B621860295; Mon, 1 Mar 2021 17:47:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614620828; bh=M4x84luWfwm/6swUPohAceH5DyzGertTAyhoMTgAa/4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UBRIU+d5NSd2APLo9xweJvMQqb84CyooZKkJ/IolLqfR299dM/BHd4M+RAfJMGGTB EUM/qB6cTNLfAdnq+3lr6qNKHcmaAxlZKP1jDIsRwXblPqiYpky0UGmJBRYpoRSBAs ioClYL9t91EoPa1FpxUSeLVuump2s1TJNzTxLbLk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kai Vehmanen , Hui Wang , Mark Brown , Sasha Levin Subject: [PATCH 5.11 267/775] ASoC: SOF: debug: Fix a potential issue on string buffer termination Date: Mon, 1 Mar 2021 17:07:15 +0100 Message-Id: <20210301161214.823968918@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@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: stable@vger.kernel.org From: Hui Wang [ Upstream commit 9037c3bde65d339017ef41d81cb58069ffc321d4 ] The function simple_write_to_buffer() doesn't add string termination at the end of buf, we need to handle it on our own. This change refers to the function tokenize_input() in debug.c and the function sof_dfsentry_trace_filter_write() in trace.c. Fixes: 091c12e1f50c ("ASoC: SOF: debug: add new debugfs entries for IPC flood test") Reviewed-by: Kai Vehmanen Signed-off-by: Hui Wang Link: https://lore.kernel.org/r/20210208103857.75705-1-hui.wang@canonical.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/sof/debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c index 30213a1beaaa2..715a374b33cfb 100644 --- a/sound/soc/sof/debug.c +++ b/sound/soc/sof/debug.c @@ -352,7 +352,7 @@ static ssize_t sof_dfsentry_write(struct file *file, const char __user *buffer, char *string; int ret; - string = kzalloc(count, GFP_KERNEL); + string = kzalloc(count+1, GFP_KERNEL); if (!string) return -ENOMEM; -- 2.27.0