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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 1392DC10F25 for ; Wed, 11 Mar 2020 07:47:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E5641206B7 for ; Wed, 11 Mar 2020 07:47:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728459AbgCKHrk (ORCPT ); Wed, 11 Mar 2020 03:47:40 -0400 Received: from mx2.suse.de ([195.135.220.15]:50876 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726160AbgCKHrk (ORCPT ); Wed, 11 Mar 2020 03:47:40 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 16D39AEAC; Wed, 11 Mar 2020 07:47:39 +0000 (UTC) From: Takashi Iwai To: Lee Jones Cc: linux-kernel@vger.kernel.org Subject: [PATCH] mfd: aat2870: Use scnprintf() for avoiding potential buffer overflow Date: Wed, 11 Mar 2020 08:47:38 +0100 Message-Id: <20200311074738.8679-1-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is still one call of sprintf() without checking the proper buffer overflow in aat2870_dump_reg(). Replace it with scnprintf() call for covering that. Signed-off-by: Takashi Iwai --- drivers/mfd/aat2870-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/aat2870-core.c b/drivers/mfd/aat2870-core.c index 78ee4b28fca2..a17cf759739d 100644 --- a/drivers/mfd/aat2870-core.c +++ b/drivers/mfd/aat2870-core.c @@ -221,7 +221,7 @@ static ssize_t aat2870_dump_reg(struct aat2870_data *aat2870, char *buf) count += sprintf(buf, "aat2870 registers\n"); for (addr = 0; addr < AAT2870_REG_NUM; addr++) { - count += sprintf(buf + count, "0x%02x: ", addr); + count += snprintf(buf + count, PAGE_SIZE - count, "0x%02x: ", addr); if (count >= PAGE_SIZE - 1) break; -- 2.16.4