usbip: fix NULL pointer dereference on errors
Fix NULL pointer dereference and obsolete comments forgotten when usbip server was converted from an interface driver to a device driver. Signed-off-by: Alexander Popov <alpopov@ptsecurity.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -33,7 +33,6 @@
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#define STUB_BUSID_ALLOC 3
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struct stub_device {
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struct usb_interface *interface;
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struct usb_device *udev;
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struct usbip_device ud;
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@ -219,7 +219,7 @@ static void stub_device_reset(struct usbip_device *ud)
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dev_dbg(&udev->dev, "device reset");
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ret = usb_lock_device_for_reset(udev, sdev->interface);
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ret = usb_lock_device_for_reset(udev, NULL);
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if (ret < 0) {
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dev_err(&udev->dev, "lock for reset\n");
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spin_lock_irq(&ud->lock);
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@ -252,7 +252,7 @@ static void stub_device_unusable(struct usbip_device *ud)
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/**
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* stub_device_alloc - allocate a new stub_device struct
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* @interface: usb_interface of a new device
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* @udev: usb_device of a new device
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*
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* Allocates and initializes a new stub_device struct.
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*/
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@ -165,12 +165,7 @@ static int tweak_reset_device_cmd(struct urb *urb)
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dev_info(&urb->dev->dev, "usb_queue_reset_device\n");
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/*
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* With the implementation of pre_reset and post_reset the driver no
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* longer unbinds. This allows the use of synchronous reset.
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*/
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if (usb_lock_device_for_reset(sdev->udev, sdev->interface) < 0) {
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if (usb_lock_device_for_reset(sdev->udev, NULL) < 0) {
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dev_err(&urb->dev->dev, "could not obtain lock to reset device\n");
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return 0;
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}
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@ -321,7 +316,7 @@ static struct stub_priv *stub_priv_alloc(struct stub_device *sdev,
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priv = kmem_cache_zalloc(stub_priv_cache, GFP_ATOMIC);
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if (!priv) {
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dev_err(&sdev->interface->dev, "alloc stub_priv\n");
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dev_err(&sdev->udev->dev, "alloc stub_priv\n");
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spin_unlock_irqrestore(&sdev->priv_lock, flags);
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usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
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return NULL;
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@ -352,7 +347,7 @@ static int get_pipe(struct stub_device *sdev, int epnum, int dir)
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else
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ep = udev->ep_out[epnum & 0x7f];
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if (!ep) {
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dev_err(&sdev->interface->dev, "no such endpoint?, %d\n",
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dev_err(&sdev->udev->dev, "no such endpoint?, %d\n",
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epnum);
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BUG();
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}
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@ -387,7 +382,7 @@ static int get_pipe(struct stub_device *sdev, int epnum, int dir)
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}
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/* NOT REACHED */
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dev_err(&sdev->interface->dev, "get pipe, epnum %d\n", epnum);
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dev_err(&sdev->udev->dev, "get pipe, epnum %d\n", epnum);
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return 0;
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}
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@ -466,7 +461,7 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
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priv->urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!priv->urb) {
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dev_err(&sdev->interface->dev, "malloc urb\n");
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dev_err(&udev->dev, "malloc urb\n");
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usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
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return;
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}
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@ -486,7 +481,7 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
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priv->urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
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GFP_KERNEL);
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if (!priv->urb->setup_packet) {
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dev_err(&sdev->interface->dev, "allocate setup_packet\n");
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dev_err(&udev->dev, "allocate setup_packet\n");
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usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
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return;
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}
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@ -517,7 +512,7 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
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usbip_dbg_stub_rx("submit urb ok, seqnum %u\n",
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pdu->base.seqnum);
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else {
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dev_err(&sdev->interface->dev, "submit_urb error, %d\n", ret);
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dev_err(&udev->dev, "submit_urb error, %d\n", ret);
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usbip_dump_header(pdu);
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usbip_dump_urb(priv->urb);
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@ -229,7 +229,7 @@ static int stub_send_ret_submit(struct stub_device *sdev)
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}
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if (txsize != sizeof(pdu_header) + urb->actual_length) {
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dev_err(&sdev->interface->dev,
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dev_err(&sdev->udev->dev,
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"actual length of urb %d does not match iso packet sizes %zu\n",
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urb->actual_length,
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txsize-sizeof(pdu_header));
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@ -261,7 +261,7 @@ static int stub_send_ret_submit(struct stub_device *sdev)
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ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg,
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iov, iovnum, txsize);
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if (ret != txsize) {
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dev_err(&sdev->interface->dev,
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dev_err(&sdev->udev->dev,
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"sendmsg failed!, retval %d for %zd\n",
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ret, txsize);
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kfree(iov);
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@ -336,7 +336,7 @@ static int stub_send_ret_unlink(struct stub_device *sdev)
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ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg, iov,
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1, txsize);
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if (ret != txsize) {
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dev_err(&sdev->interface->dev,
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dev_err(&sdev->udev->dev,
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"sendmsg failed!, retval %d for %zd\n",
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ret, txsize);
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usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
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