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ISDN: Add check for usb_alloc_urb() result

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usb_alloc_urb() return value needs to be checked to avoid
later NULL pointer access.
Reported by rucsoftsec@gmail.com via bugzilla.kernel.org #44601.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Keil 2012-07-12 22:59:46 +00:00 • committed by David S. Miller
parent 5b999fd04a
commit 2ae4605d73
2 changed files with 27 additions and 11 deletions
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20
drivers/isdn/hardware/mISDN/hfcsusb.c
View file

@ -2084,13 +2084,21 @@ hfcsusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
/* create the control pipes needed for register access */
hw->ctrl_in_pipe = usb_rcvctrlpipe(hw->dev, 0);
hw->ctrl_out_pipe = usb_sndctrlpipe(hw->dev, 0);
hw->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
driver_info =
(struct hfcsusb_vdata *)hfcsusb_idtab[vend_idx].driver_info;
printk(KERN_DEBUG "%s: %s: detected \"%s\" (%s, if=%d alt=%d)\n",
hw->name, __func__, driver_info->vend_name,
conf_str[small_match], ifnum, alt_used);
driver_info = (struct hfcsusb_vdata *)
hfcsusb_idtab[vend_idx].driver_info;
hw->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!hw->ctrl_urb) {
pr_warn("%s: No memory for control urb\n",
driver_info->vend_name);
kfree(hw);
return -ENOMEM;
}
pr_info("%s: %s: detected \"%s\" (%s, if=%d alt=%d)\n",
hw->name, __func__, driver_info->vend_name,
conf_str[small_match], ifnum, alt_used);
if (setup_instance(hw, dev->dev.parent))
return -EIO;

18
drivers/isdn/hisax/hfc_usb.c
View file

@ -1483,13 +1483,21 @@ hfc_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
usb_rcvctrlpipe(context->dev, 0);
context->ctrl_out_pipe =
usb_sndctrlpipe(context->dev, 0);
driver_info = (hfcsusb_vdata *)
hfcusb_idtab[vend_idx].driver_info;
context->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
driver_info =
(hfcsusb_vdata *) hfcusb_idtab[vend_idx].
driver_info;
printk(KERN_INFO "HFC-S USB: detected \"%s\"\n",
driver_info->vend_name);
if (!context->ctrl_urb) {
pr_warn("%s: No memory for control urb\n",
driver_info->vend_name);
kfree(context);
return -ENOMEM;
}
pr_info("HFC-S USB: detected \"%s\"\n",
driver_info->vend_name);
DBG(HFCUSB_DBG_INIT,
"HFC-S USB: Endpoint-Config: %s (if=%d alt=%d), E-Channel(%d)",