@@ -1240,7 +1240,8 @@ static void nuke(struct net2280_ep *ep)
static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct net2280_ep *ep;
- struct net2280_request *req;
+ struct net2280_request *req = NULL;
+ struct net2280_request *iter;
unsigned long flags;
u32 dmactl;
int stopped;
@@ -1266,11 +1267,13 @@ static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req)
}
/* make sure it's still queued on this endpoint */
- list_for_each_entry(req, &ep->queue, queue) {
- if (&req->req == _req)
- break;
+ list_for_each_entry(iter, &ep->queue, queue) {
+ if (&iter->req != _req)
+ continue;
+ req = iter;
+ break;
}
- if (&req->req != _req) {
+ if (!req) {
ep->stopped = stopped;
spin_unlock_irqrestore(&ep->dev->lock, flags);
ep_dbg(ep->dev, "%s: Request mismatch\n", __func__);
If the list representing the request queue does not contain the expected request, the value of the list_for_each_entry() iterator will not point to a valid structure. To avoid type confusion in such case, the list iterator scope will be limited to the list_for_each_entry() loop. In preparation to limiting scope of the list iterator to the list traversal loop, use a dedicated pointer to point to the found request object [1]. Link: https://lore.kernel.org/all/YhdfEIwI4EdtHdym@kroah.com/ Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com> --- drivers/usb/gadget/udc/net2280.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)