Re: [Bugme-new] [Bug 9594] New: Dereferencing NULL pointer on drivers/usb/gadget/ether.c

On Mon, 17 Dec 2007 22:16:23 -0800 (PST) [email protected] wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=9594
> 
>            Summary: Dereferencing NULL pointer on drivers/usb/gadget/ether.c
>            Product: Drivers
>            Version: 2.5
>      KernelVersion: 2.6.23
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: USB
>         AssignedTo: [email protected]
>         ReportedBy: [email protected]
> 
> 
> The potential error can be tracked down as follows:
> 
> (1) line 1050: let the second conjunct on the "if" statment be false
>     meaning "dev->status_ep" is null. This means the "if" evaluates to false.
> 
> follow thru the code until...
> 
> (2) line 1101: usb_ep_disable(dev->status_ep) passes in a null argument, 
>     however "use_ep_disable" cannot handle that:
> 
>    static inline int
>    usb_ep_disable (struct usb_ep *ep)
>    {
>         return ep->ops->disable (ep);
>    }
> 
> 
> -- 
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