| Message ID | 20241028035028.2657102-1-yiyang13@huawei.com |
|---|---|
| State | New |
| Headers | show |
| Series | usb: cdns2: fix possible null-ptr-deref in cdns2_gadget_ep_queue() | expand |
On Mon, Oct 28, 2024 at 03:50:28AM +0000, Yi Yang wrote: > The cdns2_gadget_ep_alloc_request() will return NULL when kzalloc() fails, > fix possible null-ptr-deref by check return value. > > Fixes: 3eb1f1efe204 ("usb: cdns2: Add main part of Cadence USBHS driver") > Signed-off-by: Yi Yang <yiyang13@huawei.com> > --- > drivers/usb/gadget/udc/cdns2/cdns2-gadget.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c > index 62fce42ef2da..c06a50af268e 100644 > --- a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c > +++ b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c > @@ -1724,6 +1724,10 @@ static int cdns2_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, > struct cdns2_request *preq; > > zlp_request = cdns2_gadget_ep_alloc_request(ep, GFP_ATOMIC); > + if (!zlp_request) { > + spin_unlock_irqrestore(&pdev->lock, flags); > + return -ENOMEM; > + } > zlp_request->buf = pdev->zlp_buf; > zlp_request->length = 0; > > -- > 2.25.1 > > How was this tested to verify it works properly? thanks, greg k-h
diff --git a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c index 62fce42ef2da..c06a50af268e 100644 --- a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c +++ b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c @@ -1724,6 +1724,10 @@ static int cdns2_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, struct cdns2_request *preq; zlp_request = cdns2_gadget_ep_alloc_request(ep, GFP_ATOMIC); + if (!zlp_request) { + spin_unlock_irqrestore(&pdev->lock, flags); + return -ENOMEM; + } zlp_request->buf = pdev->zlp_buf; zlp_request->length = 0;
The cdns2_gadget_ep_alloc_request() will return NULL when kzalloc() fails, fix possible null-ptr-deref by check return value. Fixes: 3eb1f1efe204 ("usb: cdns2: Add main part of Cadence USBHS driver") Signed-off-by: Yi Yang <yiyang13@huawei.com> --- drivers/usb/gadget/udc/cdns2/cdns2-gadget.c | 4 ++++ 1 file changed, 4 insertions(+)