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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 7EF70C742BA for ; Fri, 12 Jul 2019 12:22:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 567AC20863 for ; Fri, 12 Jul 2019 12:22:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562934135; bh=JEl2xMhTXjcFazKlCKNupjlOtV5Zgb3boqeMf0NtShA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=SeEu+/PgwVEXWcQvfSIdEkSZApoo0ku2mr3/ksOWlfEZdNRU+Ujn8cBgsJPcKOx5t Rb2GRokV4oAFwrVmGzEmtoG93sHsFAzIX+5WbBIVTNA5R5xhvFOZiifWTsZszLxKWB qTd7RJ0kle9W9GZRiyVvgMXyxBD2Fx1IvaRvV0YM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727620AbfGLMVg (ORCPT ); Fri, 12 Jul 2019 08:21:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:55816 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727615AbfGLMVg (ORCPT ); Fri, 12 Jul 2019 08:21:36 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 870C22166E; Fri, 12 Jul 2019 12:21:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562934095; bh=JEl2xMhTXjcFazKlCKNupjlOtV5Zgb3boqeMf0NtShA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BNHIoPfh1sRJovV9Wh/7n3zwfep09WvgRov2S5VqO+UgYG2Mu0aMwGQqYhZ8pqtwm Fgq2yOf9MNMN0ZocFUlPCC1TGjKVDn2rY9zoDq5r7zeWt2jfoN6kdHxGM44GfaFPga NjLq1kWk/b+1qzPaNCIloLuZW9jSfQz7ljpzBprc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Daniele Palmas , Reinhard Speyerer , "David S. Miller" , Sasha Levin Subject: [PATCH 4.19 42/91] qmi_wwan: add support for QMAP padding in the RX path Date: Fri, 12 Jul 2019 14:18:45 +0200 Message-Id: <20190712121623.738179149@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190712121621.422224300@linuxfoundation.org> References: <20190712121621.422224300@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 61356088ace1866a847a727d4d40da7bf00b67fc ] The QMAP code in the qmi_wwan driver is based on the CodeAurora GobiNet driver which does not process QMAP padding in the RX path correctly. Add support for QMAP padding to qmimux_rx_fixup() according to the description of the rmnet driver. Fixes: c6adf77953bc ("net: usb: qmi_wwan: add qmap mux protocol support") Cc: Daniele Palmas Signed-off-by: Reinhard Speyerer Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/usb/qmi_wwan.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c index e657d8947125..090227118d3d 100644 --- a/drivers/net/usb/qmi_wwan.c +++ b/drivers/net/usb/qmi_wwan.c @@ -153,7 +153,7 @@ static bool qmimux_has_slaves(struct usbnet *dev) static int qmimux_rx_fixup(struct usbnet *dev, struct sk_buff *skb) { - unsigned int len, offset = 0; + unsigned int len, offset = 0, pad_len, pkt_len; struct qmimux_hdr *hdr; struct net_device *net; struct sk_buff *skbn; @@ -171,10 +171,16 @@ static int qmimux_rx_fixup(struct usbnet *dev, struct sk_buff *skb) if (hdr->pad & 0x80) goto skip; + /* extract padding length and check for valid length info */ + pad_len = hdr->pad & 0x3f; + if (len == 0 || pad_len >= len) + goto skip; + pkt_len = len - pad_len; + net = qmimux_find_dev(dev, hdr->mux_id); if (!net) goto skip; - skbn = netdev_alloc_skb(net, len); + skbn = netdev_alloc_skb(net, pkt_len); if (!skbn) return 0; skbn->dev = net; @@ -191,7 +197,7 @@ static int qmimux_rx_fixup(struct usbnet *dev, struct sk_buff *skb) goto skip; } - skb_put_data(skbn, skb->data + offset + qmimux_hdr_sz, len); + skb_put_data(skbn, skb->data + offset + qmimux_hdr_sz, pkt_len); if (netif_rx(skbn) != NET_RX_SUCCESS) return 0; -- 2.20.1