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SubjectRe: [PATCH] usbip: Fix vhci_urb_enqueue() URB null transfer buffer error path
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Hello!

On 01/19/2019 12:29 AM, Shuah Khan wrote:

> From: Shuah Khan <shuah@kernel.org>
>
> Fix vhci_urb_enqueue() to print error and return error instead of
> failing with WARN_ON.

It's BUG_ON().

> Signed-off-by: Shuah Khan <shuah@kernel.org>
> ---
> drivers/usb/usbip/vhci_hcd.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
> index 1e592ec94ba4..849ebfde87b5 100644
> --- a/drivers/usb/usbip/vhci_hcd.c
> +++ b/drivers/usb/usbip/vhci_hcd.c
> @@ -702,8 +702,10 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag
> }
> vdev = &vhci_hcd->vdev[portnum-1];
>
> - /* patch to usb_sg_init() is in 2.5.60 */
> - BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
> + if (!urb->transfer_buffer && urb->transfer_buffer_length) {
> + dev_err(dev, "Null URB transfer buffer\n");
> + return -EINVAL;
> + }
>
> spin_lock_irqsave(&vhci->lock, flags);
>

MBR, Sergei

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