From patchwork Wed Jul 14 07:15:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongliang Mu X-Patchwork-Id: 477248 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 A0491C07E9A for ; Wed, 14 Jul 2021 07:16:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 866C1613C1 for ; Wed, 14 Jul 2021 07:16:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238242AbhGNHTA (ORCPT ); Wed, 14 Jul 2021 03:19:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238079AbhGNHS7 (ORCPT ); Wed, 14 Jul 2021 03:18:59 -0400 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E59F8C061574; Wed, 14 Jul 2021 00:16:08 -0700 (PDT) Received: by mail-pg1-x534.google.com with SMTP id w15so1438584pgk.13; Wed, 14 Jul 2021 00:16:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=s/vkP9zFndS5QwsUYMs5xfsGi1o0m0PYYdR1BcFKwpo=; b=bMNor0f4H8tDE4My6LHw4hzzoIUzfV7llzMR1Q0gOQJAET+cB7UD1sJdoNvnloc5HU 2ibTcUT3QvKDAl1HkDwxjxG7i0Uw75Z53PK6at85fCpLE9hGdRm+F69XdjPLjyKTDArI l4FrfLUh38PuByNSZAigCVh7XUPXaE4+YUbtyYz/ca9eU1MSGbG3LAQ3BM1qAUU4mlpb WGgnMMG7qjf9pS4Lu4t8KxFnIDVK+TaEXn9py6jm8SizYqHIerGcy0OudVKLWuYXD9jG idLOKtAYci/YaMyc8TvZnc8z7zli+m14zsjedYw28kO/wgxVxRvrbruowNbtPzTtSYS9 pm3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=s/vkP9zFndS5QwsUYMs5xfsGi1o0m0PYYdR1BcFKwpo=; b=Z8vaGRE0N9ovBPTTUh+R9SrjMHcKwf/mw+uk6/HKsdrxnSjTFAoiE9O8dlsQSXPR9n G5euksnKwJ0DIXP46iwoH3Ly7rvqTbn9of2k8mfwEOF3FVWlgOr3WAtBwTXngi0XoSx4 r40ziVEh+0TLTtZ/ST+UzKYnRTrPADkt0h1UVRQ6bOLwl1eTaiN1JueKapEkpJifs5Am aZzoam4V86NC6/IwYsvnQbPUPuzUcs1//JTbuso6GuylRXNgRXfp4iiFMZxbDqHrtNRx pc6ZcivfuWY3mo44NTZ9qfBuQZVZaitXDYsv0AYxkhI5/FwJxD6Q9z3pxaEwIkmfy2Pa LykQ== X-Gm-Message-State: AOAM532jom0N+1MYOhnLtXmga5wYiBiQec0BG+ZZT/jZ+GCMvbxjZrh+ zkU6Fwd2S6jQb0JwZxWW2KFkaxpK/Y2Qht9O X-Google-Smtp-Source: ABdhPJzQxbAoDoXMzDygeSjb6OQcENI2/DntUCEC7TQqNH462/RjrCftOUVn/NBJ26aROqluYXtnrA== X-Received: by 2002:aa7:84c1:0:b029:32d:6bbf:b788 with SMTP id x1-20020aa784c10000b029032d6bbfb788mr8690211pfn.38.1626246968311; Wed, 14 Jul 2021 00:16:08 -0700 (PDT) Received: from localhost.localdomain ([154.16.166.218]) by smtp.gmail.com with ESMTPSA id 133sm1583623pfx.39.2021.07.14.00.16.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jul 2021 00:16:07 -0700 (PDT) From: Dongliang Mu To: "David S. Miller" , Jakub Kicinski , Johan Hovold , Oliver Neukum , Greg Kroah-Hartman , Dongliang Mu , Dan Carpenter , YueHaibing , Anirudh Rayabharam Cc: syzbot+44d53c7255bb1aea22d2@syzkaller.appspotmail.com, linux-usb@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] usb: hso: fix error handling code of hso_create_net_device Date: Wed, 14 Jul 2021 15:15:32 +0800 Message-Id: <20210714071547.656587-1-mudongliangabcd@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The current error handling code of hso_create_net_device is hso_free_net_device, no matter which errors lead to. For example, WARNING in hso_free_net_device [1]. Fix this by refactoring the error handling code of hso_create_net_device by handling different errors by different code. [1] https://syzkaller.appspot.com/bug?id=66eff8d49af1b28370ad342787413e35bbe76efe Reported-by: syzbot+44d53c7255bb1aea22d2@syzkaller.appspotmail.com Fixes: 5fcfb6d0bfcd ("hso: fix bailout in error case of probe") Signed-off-by: Dongliang Mu --- drivers/net/usb/hso.c | 37 +++++++++++++++++++++++++++---------- 1 file changed, 27 insertions(+), 10 deletions(-) diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 54ef8492ca01..90fa4d9fa119 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -2495,7 +2495,9 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface, hso_net_init); if (!net) { dev_err(&interface->dev, "Unable to create ethernet device\n"); - goto exit; + kfree(hso_dev); + usb_free_urb(hso_net->mux_bulk_tx_urb); + return NULL; } hso_net = netdev_priv(net); @@ -2508,13 +2510,13 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface, USB_DIR_IN); if (!hso_net->in_endp) { dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); - goto exit; + goto err_get_ep; } hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT); if (!hso_net->out_endp) { dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); - goto exit; + goto err_get_ep; } SET_NETDEV_DEV(net, &interface->dev); SET_NETDEV_DEVTYPE(net, &hso_type); @@ -2523,18 +2525,18 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface, for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); if (!hso_net->mux_bulk_rx_urb_pool[i]) - goto exit; + goto err_mux_bulk_rx; hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, GFP_KERNEL); if (!hso_net->mux_bulk_rx_buf_pool[i]) - goto exit; + goto err_mux_bulk_rx; } hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); if (!hso_net->mux_bulk_tx_urb) - goto exit; + goto err_mux_bulk_tx; hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); if (!hso_net->mux_bulk_tx_buf) - goto exit; + goto err_mux_bulk_tx; add_net_device(hso_dev); @@ -2542,7 +2544,7 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface, result = register_netdev(net); if (result) { dev_err(&interface->dev, "Failed to register device\n"); - goto exit; + goto err_register; } hso_log_port(hso_dev); @@ -2550,8 +2552,23 @@ static struct hso_device *hso_create_net_device(struct usb_interface *interface, hso_create_rfkill(hso_dev, interface); return hso_dev; -exit: - hso_free_net_device(hso_dev, true); + +err_register: + unregister_netdev(net); + remove_net_device(hso_dev); +err_mux_bulk_tx: + kfree(hso_net->mux_bulk_tx_buf); + hso_net->mux_bulk_tx_buf = NULL; + usb_free_urb(hso_net->mux_bulk_tx_urb); +err_mux_bulk_rx: + for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { + usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); + kfree(hso_net->mux_bulk_rx_buf_pool[i]); + hso_net->mux_bulk_rx_buf_pool[i] = NULL; + } +err_get_ep: + free_netdev(net); + kfree(hso_dev); return NULL; }