Re: [patch] pm_qos_params: cleanup: terminate a string

[Dan Carpenter]

On Tue, Sep 07, 2010 at 06:38:05AM -0700, mark gross wrote:
> >  	spin_unlock_irqrestore(&pm_qos_lock, flags);
> > @@ -374,10 +374,12 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
> >  	} else if (count == 11) { /* len('0x12345678/0') */
> >  		if (copy_from_user(ascii_value, buf, 11))
> >  			return -EFAULT;
> > +		if (strlen(ascii_value) > 10)
>                          should be !=
> 
> > +			return -EINVAL;
> >  		x = sscanf(ascii_value, "%x", &value);
> >  		if (x != 1)
> >  			return -EINVAL;

With the original code you could do:
	char buf[11];  /* must be 11 chars */

	snprintf(buf, sizeof(buf), "0x%x", 42);
	write(fd, buf, sizeof(buf));

But the new code is stricter so the number would have to be zero padded.

regards,
dan carpenter
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