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authorKarsten Keil <kkeil@linux-pingi.de>2012-07-12 22:59:46 +0000
committerDavid S. Miller <davem@davemloft.net>2012-07-18 09:40:54 -0700
commit2ae4605d738ede6d94a481a30972fadfdaf73549 (patch)
tree7b92b5c173d75ffa83be5e8e9a6ad391bcd23737 /drivers/isdn/hisax
parent5b999fd04af95e2cb624aaf6a7637561572b2d96 (diff)
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')
-rw-r--r--drivers/isdn/hisax/hfc_usb.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/isdn/hisax/hfc_usb.c b/drivers/isdn/hisax/hfc_usb.c
index 84f9c810307..849a8075268 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)",