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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 133DDC352AA for ; Tue, 1 Oct 2019 16:45:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D53EB20B7C for ; Tue, 1 Oct 2019 16:45:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948349; bh=4/1WMFpvEtJisXoIx8yqSm8+ou6YBcEv5rXgYGQ49L8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TI4XmM/OOetiPn1YLz0/vKVE3Td6xpMGvQMlK+m6zviML18g32KgZaOKvxhCYvbjz 1bBiW/kvnjxYYUVEX4HVpZMuZ5IduCMRzX0tAZA9k0UCgzogptn4Z1gMDtaJSpbPBc D9CkHl5DaAxB6ImIGsRfJoGk6kZV86TVpFGELfUc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388229AbfJAQps (ORCPT ); Tue, 1 Oct 2019 12:45:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:58308 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390388AbfJAQpp (ORCPT ); Tue, 1 Oct 2019 12:45:45 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9FD3D2190F; Tue, 1 Oct 2019 16:45:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948344; bh=4/1WMFpvEtJisXoIx8yqSm8+ou6YBcEv5rXgYGQ49L8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZkODZ435u1WkE8AfEgflBNyntlWUyXeEtXpvehnCxywGtJPIAPLWPTFdX+FxHU0Pk prc0eZydirH78mY68AOFtBsN+Hav6RPPzglgzycMuV9FZxyQwWirw1t1vyiVBFt+/4 Mu/ZeCkt4IWOGlBVAjragUg/R1fz6g+wMPsEWXbA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Bj=C3=B8rn=20Mork?= , Jakub Kicinski , Sasha Levin , netdev@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 08/15] usbnet: ignore endpoints with invalid wMaxPacketSize Date: Tue, 1 Oct 2019 12:45:26 -0400 Message-Id: <20191001164533.16915-8-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191001164533.16915-1-sashal@kernel.org> References: <20191001164533.16915-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bjørn Mork [ Upstream commit 8d3d7c2029c1b360f1a6b0a2fca470b57eb575c0 ] Endpoints with zero wMaxPacketSize are not usable for transferring data. Ignore such endpoints when looking for valid in, out and status pipes, to make the drivers more robust against invalid and meaningless descriptors. The wMaxPacketSize of these endpoints are used for memory allocations and as divisors in many usbnet minidrivers. Avoiding zero is therefore critical. Signed-off-by: Bjørn Mork Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/usb/usbnet.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 2502681369cd1..6c531abe198bb 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -115,6 +115,11 @@ int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) int intr = 0; e = alt->endpoint + ep; + + /* ignore endpoints which cannot transfer data */ + if (!usb_endpoint_maxp(&e->desc)) + continue; + switch (e->desc.bmAttributes) { case USB_ENDPOINT_XFER_INT: if (!usb_endpoint_dir_in(&e->desc)) -- 2.20.1