From patchwork Thu Dec 12 11:10:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ingo Rohloff X-Patchwork-Id: 13904982 Received: from bm.lauterbach.com (bm.lauterbach.com [62.154.241.218]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BFE691C5497 for ; Thu, 12 Dec 2024 11:15:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.154.241.218 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734002150; cv=none; b=RmR+G01mp6OsDvzbY7ujayJRpNOJb6GxHlW/VMnkXazmG7jKesCWkf+N8O5d4JxuX+AXdufmHxhf1H2Tl1rI8yT+4PaObFUwvD0ERa60S5VPnSOtDSSqnvEvOszcllwPy6gXkTa0Vk8m74Km4clVOTfOVsWGFqgaLaSOT2ytxgA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734002150; c=relaxed/simple; bh=msvDEelk8BK5mdnHG6ztH5vQz9qQ9wp90PjcB2UM7/4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Rdq33ILMKrcPaNmlsWabQW27m2lfnCRh1ZGJYjxCwPmKizZ+/sTowqu3Fdg37/pnD7NRVnA7g6piKtZaOR2UO+XRpvcSsPpnMxvGKWoFFgyEyVmlcd5IT5ZGGnGOuMWI6n9ozTcg2DYZmKQuQtmH6xOi/kiuD4oYQpkdiE0RSBs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lauterbach.com; spf=pass smtp.mailfrom=lauterbach.com; arc=none smtp.client-ip=62.154.241.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lauterbach.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lauterbach.com Received: from ingpc2.intern.lauterbach.com (unknown [10.2.10.44]) (Authenticated sender: ingo.rohloff@lauterbach.com) by bm.lauterbach.com (Postfix) with ESMTPSA id E9CA04270ECC; Thu, 12 Dec 2024 12:10:14 +0100 (CET) From: Ingo Rohloff To: gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, Ingo Rohloff Subject: [PATCH] usb: gadget: configfs: Ignore trailing LF for user strings to cdev Date: Thu, 12 Dec 2024 12:10:04 +0100 Message-ID: <20241212111004.7901-1-ingo.rohloff@lauterbach.com> X-Mailer: git-send-email 2.47.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Bm-Milter-Handled: 166a2dfb-2e12-4590-8fa5-72e30323519f X-Bm-Transport-Timestamp: 1734001815004 Since commit c033563220e0f7a8 ("usb: gadget: configfs: Attach arbitrary strings to cdev") a user can provide extra string descriptors to a USB gadget via configfs. For "manufacturer", "product", "serialnumber", setting the string via configfs ignores a trailing LF. For the arbitrary strings the LF was not ignored. This patch ignores a trailing LF to make this consistent with the existing behavior for "manufacturer", ... string descriptors. Signed-off-by: Ingo Rohloff --- drivers/usb/gadget/configfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 6499a88d346c..fba2a56dae97 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -827,11 +827,15 @@ static ssize_t gadget_string_s_store(struct config_item *item, const char *page, { struct gadget_string *string = to_gadget_string(item); int size = min(sizeof(string->string), len + 1); + ssize_t cpy_len; if (len > USB_MAX_STRING_LEN) return -EINVAL; - return strscpy(string->string, page, size); + cpy_len = strscpy(string->string, page, size); + if (cpy_len > 0 && string->string[cpy_len - 1] == '\n') + string->string[cpy_len - 1] = 0; + return len; } CONFIGFS_ATTR(gadget_string_, s);