From patchwork Wed Mar 17 22:41:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dean Anderson X-Patchwork-Id: 12147085 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 19784C433DB for ; Wed, 17 Mar 2021 23:04:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D862664F4D for ; Wed, 17 Mar 2021 23:04:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229658AbhCQXDd (ORCPT ); Wed, 17 Mar 2021 19:03:33 -0400 Received: from gateway22.websitewelcome.com ([192.185.47.100]:45756 "EHLO gateway22.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229723AbhCQXD1 (ORCPT ); Wed, 17 Mar 2021 19:03:27 -0400 X-Greylist: delayed 1329 seconds by postgrey-1.27 at vger.kernel.org; Wed, 17 Mar 2021 19:03:27 EDT Received: from cm16.websitewelcome.com (cm16.websitewelcome.com [100.42.49.19]) by gateway22.websitewelcome.com (Postfix) with ESMTP id C288419E49 for ; Wed, 17 Mar 2021 17:41:16 -0500 (CDT) Received: from gator3086.hostgator.com ([50.87.144.121]) by cmsmtp with SMTP id MeqqlIl3vb8LyMeqqlnDOS; Wed, 17 Mar 2021 17:41:16 -0500 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sensoray.com; s=default; h=Message-Id:Date:Subject:Cc:To:From:Sender: Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=PWkJ4oGtfXpPi3sjnJ/M1SpHqocBADhTPLfK4c0TuWo=; b=fhtV3Ewgs6RMoubGJEUhxiWPCl do5nAw9Ii0ARkAo3G9CnFp4vNP7Cw23nZYAR2qDBSLcxKfOcIrBD0PYxl14Ax9nH+RGZiY95orQ8f pUtF1WWu9WBJL76Bzvt7AK/vz1VItswsUragTYXmt2B8V2m554MtxhWTiIiJ1W16rlXA=; Received: from 97-120-57-254.ptld.qwest.net ([97.120.57.254]:41972 helo=localhost.localdomain) by gator3086.hostgator.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1lMeqp-0016Yu-Ox; Wed, 17 Mar 2021 17:41:15 -0500 From: Dean Anderson To: linux-usb@vger.kernel.org, balbi@kernel.org Cc: Dean Anderson , Linux Media Mailing List Subject: [PATCH] usb: gadget/function/f_fs string table fix for multiple languages Date: Wed, 17 Mar 2021 15:41:09 -0700 Message-Id: <20210317224109.21534-1-dean@sensoray.com> X-Mailer: git-send-email 2.17.1 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator3086.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - sensoray.com X-BWhitelist: no X-Source-IP: 97.120.57.254 X-Source-L: No X-Exim-ID: 1lMeqp-0016Yu-Ox X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 97-120-57-254.ptld.qwest.net (localhost.localdomain) [97.120.57.254]:41972 X-Source-Auth: dean@sensoray.com X-Email-Count: 6 X-Source-Cap: c2Vuc29yYXk7c2Vuc29yYXk7Z2F0b3IzMDg2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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 --- drivers/usb/gadget/function/f_fs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index 801a8b668..10a5d9f0f 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -2640,6 +2640,7 @@ static int __ffs_data_got_strings(struct ffs_data *ffs, do { /* lang_count > 0 so we can use do-while */ unsigned needed = needed_count; + u32 str_per_lang = str_count; if (len < 3) goto error_free; @@ -2675,7 +2676,7 @@ static int __ffs_data_got_strings(struct ffs_data *ffs, data += length + 1; len -= length + 1; - } while (--str_count); + } while (--str_per_lang); s->id = 0; /* terminator */ s->s = NULL;