[PATCH] USB ATM: avoid oops on bind failure; plug memory leak
Zero the entire instance, not just the struct usbatm_data head.
Make sure the just allocated urb is freed if we fail to allocate
a buffer. Based on a patch by Stanislaw W. Gruszka.
Signed-off-by: Duncan Sands <baldrick@free.fr>
Acked-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index bb2b5d2..b178c80 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -949,6 +949,7 @@
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct usbatm_data *instance;
char *buf;
+ size_t instance_size = sizeof(*instance) + sizeof(struct urb *) * (num_rcv_urbs + num_snd_urbs);
int error = -ENOMEM;
int i, length;
int need_heavy;
@@ -960,14 +961,13 @@
intf->altsetting->desc.bInterfaceNumber);
/* instance init */
- instance = kmalloc(sizeof(*instance) + sizeof(struct urb *) * (num_rcv_urbs + num_snd_urbs),
- GFP_KERNEL);
+ instance = kmalloc(instance_size, GFP_KERNEL);
if (!instance) {
dev_dbg(dev, "%s: no memory for instance data!\n", __func__);
return -ENOMEM;
}
- memset(instance, 0, sizeof(*instance));
+ memset(instance, 0, instance_size);
/* public fields */
@@ -1051,6 +1051,8 @@
goto fail_unbind;
}
+ instance->urbs[i] = urb;
+
buffer = kmalloc(channel->buf_size, GFP_KERNEL);
if (!buffer) {
dev_dbg(dev, "%s: no memory for buffer %d!\n", __func__, i);
@@ -1078,7 +1080,6 @@
vdbg("%s: alloced buffer 0x%p buf size %u urb 0x%p",
__func__, urb->transfer_buffer, urb->transfer_buffer_length, urb);
- instance->urbs[i] = urb;
}
if (need_heavy && driver->heavy_init) {