Re: [Bugme-new] [Bug 9573] New: NULL pointer dereference on drivers/usb/serial/whiteheat.c

[Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>]

On Sat, 15 Dec 2007 07:08:52 -0800 (PST) bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=9573
> 
>            Summary: NULL pointer dereference on
>                     drivers/usb/serial/whiteheat.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: greg@xxxxxxxxx
>         ReportedBy: marciobuss@xxxxxxxxx
> 
> 
> There's a null pointer dereference on drivers/usb/serial/whiteheat.c as
> follows:
> 
> (1) line 613:  the test "if (port->tty)" implies that null is a legal value
>     for "port->tty" at that point
> 
> (2) neither firm_open nor firm_purge initialize "port->tty"
> 
> (3) line 630: "port->tty" is dereferenced at statement
>     old_term.c_cflag = ~port->tty->termios->c_cflag;
> 
> 
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