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staging: gdm724x: fix leak at failure path in gdm_usb_probe()

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Error handling code in gdm_usb_probe() deallocates all resources,
but calls usb_get_dev(usbdev) and returns error code after that.

The patch fixes it and, by the way, several other issues:
- no need to use GFP_ATOMIC in probe();
- return -ENODEV instead of -1;
- kmalloc+memset -> kzalloc

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexey Khoroshilov 2013-11-16 00:46:24 +04:00 committed by Greg Kroah-Hartman
parent 5e1284758a
commit a34c72b348
1 changed files with 17 additions and 23 deletions
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40
drivers/staging/gdm724x/gdm_usb.c
View file

@ -830,24 +830,19 @@ static int gdm_usb_probe(struct usb_interface *intf, const struct usb_device_id
if (bInterfaceNumber > NETWORK_INTERFACE) {
pr_info("not a network device\n");
return -1;
return -ENODEV;
}
phy_dev = kmalloc(sizeof(struct phy_dev), GFP_ATOMIC);
if (!phy_dev) {
ret = -ENOMEM;
goto out;
}
phy_dev = kzalloc(sizeof(struct phy_dev), GFP_KERNEL);
if (!phy_dev)
return -ENOMEM;
udev = kmalloc(sizeof(struct lte_udev), GFP_ATOMIC);
udev = kzalloc(sizeof(struct lte_udev), GFP_KERNEL);
if (!udev) {
ret = -ENOMEM;
goto out;
goto err_udev;
}
memset(phy_dev, 0, sizeof(struct phy_dev));
memset(udev, 0, sizeof(struct lte_udev));
phy_dev->priv_dev = (void *)udev;
phy_dev->send_hci_func = gdm_usb_hci_send;
phy_dev->send_sdu_func = gdm_usb_sdu_send;
@ -858,7 +853,7 @@ static int gdm_usb_probe(struct usb_interface *intf, const struct usb_device_id
ret = init_usb(udev);
if (ret < 0) {
pr_err("init_usb func failed\n");
goto out;
goto err_init_usb;
}
udev->intf = intf;
@ -875,23 +870,22 @@ static int gdm_usb_probe(struct usb_interface *intf, const struct usb_device_id
ret = request_mac_address(udev);
if (ret < 0) {
pr_err("request Mac address failed\n");
goto out;
goto err_mac_address;
}
start_rx_proc(phy_dev);
out:
if (ret < 0) {
kfree(phy_dev);
if (udev) {
release_usb(udev);
kfree(udev);
}
}
usb_get_dev(usbdev);
usb_set_intfdata(intf, phy_dev);
return 0;
err_mac_address:
release_usb(udev);
err_init_usb:
kfree(udev);
err_udev:
kfree(phy_dev);
return ret;
}