Re: [PATCH] fix potential NULL pointer dereference in yam

Ralf Baechle
2006-05-16T09:57:45Z

On Mon, May 15, 2006 at 10:19:36PM +0200, Jesper Juhl wrote:

> > How can it be NULL here? The whole array of valid net_devices was
> > allocated at module init time.
> >
>
> It cannot. You are right, I'm wrong.
> I guess removing the check makes sense then ?

Yes.

Acked-by: Ralf Baechle <ralf@linux-mips.org>

> Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
> ---
>
> --- linux-2.6.17-rc4-mm1-orig/drivers/net/hamradio/yam.c 2006-05-13 21:28:27.000000000 +0200
> +++ linux-2.6.17-rc4-mm1/drivers/net/hamradio/yam.c 2006-05-15 22:16:32.000000000 +0200
> @@ -852,7 +852,7 @@ static int yam_open(struct net_device *d
>
> printk(KERN_INFO "Trying %s at iobase 0x%lx irq %u\n", dev->name, dev->base_addr, dev->irq);
>
> - if (!dev || !yp->bitrate)
> + if (!yp->bitrate)
> return -ENXIO;
> if (!dev->base_addr || dev->base_addr > 0x1000 - YAM_EXTENT ||
> dev->irq < 2 || dev->irq > 15) {
>

73 de DL5RB op Ralf

--
Loc. JN47BS / CQ 14 / ITU 28 / DOK A21