diff options
| author | Karsten Keil <kkeil@linux-pingi.de> | 2012-07-12 22:59:46 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-18 09:40:54 -0700 |
| commit | 2ae4605d738ede6d94a481a30972fadfdaf73549 (patch) | |
| tree | 7b92b5c173d75ffa83be5e8e9a6ad391bcd23737 /drivers/isdn/hisax/hfc_usb.c | |
| parent | 5b999fd04af95e2cb624aaf6a7637561572b2d96 (diff) | |
| download | lwn-2ae4605d738ede6d94a481a30972fadfdaf73549.tar.gz lwn-2ae4605d738ede6d94a481a30972fadfdaf73549.zip | |
ISDN: Add check for usb_alloc_urb() result
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>
Diffstat (limited to 'drivers/isdn/hisax/hfc_usb.c')
| -rw-r--r-- | drivers/isdn/hisax/hfc_usb.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/isdn/hisax/hfc_usb.c b/drivers/isdn/hisax/hfc_usb.c index 84f9c8103078..849a80752685 100644 --- a/drivers/isdn/hisax/hfc_usb.c +++ b/drivers/isdn/hisax/hfc_usb.c @@ -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)", |