From 44bfb43f9afab9b2944bb98bc0d514303f029ff9 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 4 Sep 2015 22:03:42 -0600 Subject: [PATCH] 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 --- drivers/usb/gadget/composite.c | 1 + drivers/usb/gadget/g_dnl.c | 2 -- 2 files changed, 1 insertion(+), 2 deletions(-) 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); -- 2.30.2