From: Pavel Skripkin paskripkin@gmail.com
commit 7f5d86669fa4d485523ddb1d212e0a2d90bd62bb upstream.
In case of caif_enroll_dev() fail, allocated link_support won't be assigned to the corresponding structure. So simply free allocated pointer in case of error.
Fixes: 7ad65bf68d70 ("caif: Add support for CAIF over CDC NCM USB interface") Cc: stable@vger.kernel.org Signed-off-by: Pavel Skripkin paskripkin@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/caif/caif_usb.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
--- a/net/caif/caif_usb.c +++ b/net/caif/caif_usb.c @@ -116,6 +116,11 @@ static struct cflayer *cfusbl_create(int return (struct cflayer *) this; }
+static void cfusbl_release(struct cflayer *layer) +{ + kfree(layer); +} + static struct packet_type caif_usb_type __read_mostly = { .type = cpu_to_be16(ETH_P_802_EX1), }; @@ -128,6 +133,7 @@ static int cfusbl_device_notify(struct n struct cflayer *layer, *link_support; struct usbnet *usbnet; struct usb_device *usbdev; + int res;
/* Check whether we have a NCM device, and find its VID/PID. */ if (!(dev->dev.parent && dev->dev.parent->driver && @@ -170,8 +176,11 @@ static int cfusbl_device_notify(struct n if (dev->num_tx_queues > 1) pr_warn("USB device uses more than one tx queue\n");
- caif_enroll_dev(dev, &common, link_support, CFUSB_MAX_HEADLEN, + res = caif_enroll_dev(dev, &common, link_support, CFUSB_MAX_HEADLEN, &layer, &caif_usb_type.func); + if (res) + goto err; + if (!pack_added) dev_add_pack(&caif_usb_type); pack_added = true; @@ -181,6 +190,9 @@ static int cfusbl_device_notify(struct n layer->name[sizeof(layer->name) - 1] = 0;
return 0; +err: + cfusbl_release(link_support); + return res; }
static struct notifier_block caif_device_notifier = {