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USB: serial: io_edgeport: fix memory leaks in attach error path 

Private data, URBs and buffers allocated for Epic devices during
attach were never released on errors (e.g. missing endpoints).

Fixes: 6e8cf7751f ("USB: add EPIC support to the io_edgeport driver")
Cc: stable <stable@vger.kernel.org>	# v2.6.21
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2016-05-08 20:07:56 +02:00
parent ab5701ada2
commit c5c0c55598
1 changed files with 28 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/usb/serial/io_edgeport.c
View File

@ -2849,14 +2849,16 @@ static int edge_startup(struct usb_serial *serial)
/* not set up yet, so do it now */
edge_serial->interrupt_read_urb =
usb_alloc_urb(0, GFP_KERNEL);
if (!edge_serial->interrupt_read_urb)
return -ENOMEM;
if (!edge_serial->interrupt_read_urb) {
response = -ENOMEM;
break;
}
edge_serial->interrupt_in_buffer =
kmalloc(buffer_size, GFP_KERNEL);
if (!edge_serial->interrupt_in_buffer) {
usb_free_urb(edge_serial->interrupt_read_urb);
return -ENOMEM;
response = -ENOMEM;
break;
}
edge_serial->interrupt_in_endpoint =
endpoint->bEndpointAddress;
@ -2884,14 +2886,16 @@ static int edge_startup(struct usb_serial *serial)
/* not set up yet, so do it now */
edge_serial->read_urb =
usb_alloc_urb(0, GFP_KERNEL);
if (!edge_serial->read_urb)
return -ENOMEM;
if (!edge_serial->read_urb) {
response = -ENOMEM;
break;
}
edge_serial->bulk_in_buffer =
kmalloc(buffer_size, GFP_KERNEL);
if (!edge_serial->bulk_in_buffer) {
usb_free_urb(edge_serial->read_urb);
return -ENOMEM;
response = -ENOMEM;
break;
}
edge_serial->bulk_in_endpoint =
endpoint->bEndpointAddress;
@ -2917,9 +2921,22 @@ static int edge_startup(struct usb_serial *serial)
}
}
if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
dev_err(ddev, "Error - the proper endpoints were not found!\n");
return -ENODEV;
if (response || !interrupt_in_found || !bulk_in_found ||
!bulk_out_found) {
if (!response) {
dev_err(ddev, "expected endpoints not found\n");
response = -ENODEV;
}
usb_free_urb(edge_serial->interrupt_read_urb);
kfree(edge_serial->interrupt_in_buffer);
usb_free_urb(edge_serial->read_urb);
kfree(edge_serial->bulk_in_buffer);
kfree(edge_serial);
return response;
}
/* start interrupt read for this edgeport this interrupt will