usb: gadget: don't leak configs when unbinding
By the time g_dnl_unbind() is run, cdev->config has been set to NULL,
so the free() there does nothing, and the config struct is leaked.
Equally, struct usb_gadget contains a linked list of config structs, so
the code should iterate over them all and free each one, rather than
freeing one particular config struct.
composite_unbind() already iterates over the list of config structs, and
unlinks each from the linked list. Fix this loop to free() each struct as
it's unlinked and otherwise forgotten.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index d96296c..a13b21d 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -948,6 +948,7 @@
debug("unbind config '%s'/%p\n", c->label, c);
c->unbind(c);
}
+ free(c);
}
if (composite->unbind)
composite->unbind(cdev);
diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c
index ad89a0d..2fa6da4 100644
--- a/drivers/usb/gadget/g_dnl.c
+++ b/drivers/usb/gadget/g_dnl.c
@@ -93,8 +93,6 @@
{
struct usb_gadget *gadget = cdev->gadget;
- free(cdev->config);
- cdev->config = NULL;
debug("%s: calling usb_gadget_disconnect for "
"controller '%s'\n", __func__, gadget->name);
usb_gadget_disconnect(gadget);