* Re: [PATCH v2] usb: cdns3: change place of NULL check in cdns3_gadget_ep_enable()
2022-07-28 16:30 ` [PATCH v2] usb: cdns3: change place of NULL check in cdns3_gadget_ep_enable() Andrey Strachuk
@ 2022-08-03 12:26 ` Roger Quadros
2022-08-19 8:36 ` Greg Kroah-Hartman
1 sibling, 0 replies; 3+ messages in thread
From: Roger Quadros @ 2022-08-03 12:26 UTC (permalink / raw)
To: Andrey Strachuk, Peter Chen
Cc: Greg Kroah-Hartman, Pawel Laszczak, Aswath Govindraju,
Felipe Balbi, linux-usb, linux-kernel, ldv-project
On 28/07/2022 19:30, Andrey Strachuk wrote:
> If 'ep' is NULL, result of ep_to_cdns3_ep(ep) is invalid and
> priv_ep->cdns3_dev causes panic.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Signed-off-by: Andrey Strachuk <strochuk@ispras.ru>
> Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
Acked-by: Roger Quadros <rogerq@kernel.org>
cheers,
-roger
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] usb: cdns3: change place of NULL check in cdns3_gadget_ep_enable()
2022-07-28 16:30 ` [PATCH v2] usb: cdns3: change place of NULL check in cdns3_gadget_ep_enable() Andrey Strachuk
2022-08-03 12:26 ` Roger Quadros
@ 2022-08-19 8:36 ` Greg Kroah-Hartman
1 sibling, 0 replies; 3+ messages in thread
From: Greg Kroah-Hartman @ 2022-08-19 8:36 UTC (permalink / raw)
To: Andrey Strachuk
Cc: Peter Chen, Pawel Laszczak, Roger Quadros, Aswath Govindraju,
Felipe Balbi, linux-usb, linux-kernel, ldv-project
On Thu, Jul 28, 2022 at 07:30:14PM +0300, Andrey Strachuk wrote:
> If 'ep' is NULL, result of ep_to_cdns3_ep(ep) is invalid and
> priv_ep->cdns3_dev causes panic.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Signed-off-by: Andrey Strachuk <strochuk@ispras.ru>
> Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
> ---
> drivers/usb/cdns3/cdns3-gadget.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
No information on what changed from v1 to v2 :(
>
> diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
> index 5c15c48952a6..51de7457a3b8 100644
> --- a/drivers/usb/cdns3/cdns3-gadget.c
> +++ b/drivers/usb/cdns3/cdns3-gadget.c
> @@ -2284,11 +2284,14 @@ static int cdns3_gadget_ep_enable(struct usb_ep *ep,
> int ret = 0;
> int val;
>
> + if (!ep)
> + return -EINVAL;
How can ep ever be NULL at all? Why does this need to be checked?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 3+ messages in thread