From patchwork Thu May 20 09:21:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 445313 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=-19.1 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 62819C433B4 for ; Thu, 20 May 2021 11:13:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3880F60FDB for ; Thu, 20 May 2021 11:13:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239736AbhETLOD (ORCPT ); Thu, 20 May 2021 07:14:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:56154 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239719AbhETLL1 (ORCPT ); Thu, 20 May 2021 07:11:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8022361942; Thu, 20 May 2021 10:07:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621505252; bh=uiYM2F+7VWWT1FmjtdmltqoL6ZZCeOhLp755MzLJqmM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=giKVwIHpywSQJa1ZPtupsIuqbCLb2pQ5ux3OEIgfYVIMeyUU6xpaF9LWYq5rpB8wA uIgSdhA8LDkVEdYBZ+GwEzfgdGjnj8FR8KyQuB86Kup0NogY+O0CKg/zZjmNkid3Fh 1dVy5CU328Te1+fHpcn0PQw5aNnBlX0hss3sepNU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dean Anderson Subject: [PATCH 4.4 051/190] usb: gadget/function/f_fs string table fix for multiple languages Date: Thu, 20 May 2021 11:21:55 +0200 Message-Id: <20210520092103.865287189@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092102.149300807@linuxfoundation.org> References: <20210520092102.149300807@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dean Anderson commit 55b74ce7d2ce0b0058f3e08cab185a0afacfe39e upstream. Fixes bug with the handling of more than one language in the string table in f_fs.c. str_count was not reset for subsequent language codes. str_count-- "rolls under" and processes u32 max strings on the processing of the second language entry. The existing bug can be reproduced by adding a second language table to the structure "strings" in tools/usb/ffs-test.c. Signed-off-by: Dean Anderson Link: https://lore.kernel.org/r/20210317224109.21534-1-dean@sensoray.com Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/f_fs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -2341,6 +2341,7 @@ static int __ffs_data_got_strings(struct do { /* lang_count > 0 so we can use do-while */ unsigned needed = needed_count; + u32 str_per_lang = str_count; if (unlikely(len < 3)) goto error_free; @@ -2376,7 +2377,7 @@ static int __ffs_data_got_strings(struct data += length + 1; len -= length + 1; - } while (--str_count); + } while (--str_per_lang); s->id = 0; /* terminator */ s->s = NULL;