From: Stephen Warren Date: Sat, 5 Sep 2015 04:03:42 +0000 (-0600) Subject: usb: gadget: don't leak configs when unbinding X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=44bfb43f9afab9b2944bb98bc0d514303f029ff9;p=project%2Fbcm63xx%2Fu-boot.git 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 Acked-by: Lukasz Majewski Tested-by: Lukasz Majewski --- diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index d96296cd73..a13b21d0a0 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -948,6 +948,7 @@ static void composite_unbind(struct usb_gadget *gadget) 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 ad89a0d2e6..2fa6da4091 100644 --- a/drivers/usb/gadget/g_dnl.c +++ b/drivers/usb/gadget/g_dnl.c @@ -93,8 +93,6 @@ static int g_dnl_unbind(struct usb_composite_dev *cdev) { 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);