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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDD47C433EF for ; Wed, 10 Nov 2021 18:46:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A76F761207 for ; Wed, 10 Nov 2021 18:46:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233290AbhKJSs5 (ORCPT ); Wed, 10 Nov 2021 13:48:57 -0500 Received: from mail.kernel.org ([198.145.29.99]:47660 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233137AbhKJSsE (ORCPT ); Wed, 10 Nov 2021 13:48:04 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id A54F361207; Wed, 10 Nov 2021 18:45:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636569917; bh=7H6NrHchjK1Z34q9gQeFm+AvoKGZtgdek+yNGcRwCKc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wOnOMwN5LOGMn2AHgaM2dtTwM683kidwfDhxr6dMAonOu+Vc3rNdl6sWoMqDe2y25 klR9vqUqU+SPDK4nS0H9ZZoeiSKfYzRIBt2CVjmcZPWwnXuP+54/Vn9pvk+sqKFiCS wrSFm+cmN+a2MdSgBYuuxsJyL8HDz8RONdvpVas0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+44d53c7255bb1aea22d2@syzkaller.appspotmail.com, Dongliang Mu , "David S. Miller" , Lee Jones Subject: [PATCH 4.9 06/22] usb: hso: fix error handling code of hso_create_net_device Date: Wed, 10 Nov 2021 19:43:13 +0100 Message-Id: <20211110182001.789907399@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211110182001.579561273@linuxfoundation.org> References: <20211110182001.579561273@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dongliang Mu commit a6ecfb39ba9d7316057cea823b196b734f6b18ca upstream. 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 Signed-off-by: David S. Miller Signed-off-by: Lee Jones Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/hso.c | 33 +++++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 10 deletions(-) --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -2512,7 +2512,7 @@ static struct hso_device *hso_create_net hso_net_init); if (!net) { dev_err(&interface->dev, "Unable to create ethernet device\n"); - goto exit; + goto err_hso_dev; } hso_net = netdev_priv(net); @@ -2525,13 +2525,13 @@ static struct hso_device *hso_create_net USB_DIR_IN); if (!hso_net->in_endp) { dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); - goto exit; + goto err_net; } 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_net; } SET_NETDEV_DEV(net, &interface->dev); SET_NETDEV_DEVTYPE(net, &hso_type); @@ -2540,18 +2540,18 @@ static struct hso_device *hso_create_net 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_rx; 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_free_tx_urb; add_net_device(hso_dev); @@ -2559,7 +2559,7 @@ static struct hso_device *hso_create_net result = register_netdev(net); if (result) { dev_err(&interface->dev, "Failed to register device\n"); - goto exit; + goto err_free_tx_buf; } hso_log_port(hso_dev); @@ -2567,8 +2567,21 @@ static struct hso_device *hso_create_net hso_create_rfkill(hso_dev, interface); return hso_dev; -exit: - hso_free_net_device(hso_dev); + +err_free_tx_buf: + remove_net_device(hso_dev); + kfree(hso_net->mux_bulk_tx_buf); +err_free_tx_urb: + 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]); + } +err_net: + free_netdev(net); +err_hso_dev: + kfree(hso_dev); return NULL; }