Re: [PATCH 1/3] scsi_dh: Add modalias support for SCSI targets

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On Wed, 2009-03-18 at 09:44 -0400, Konrad Rzeszutek wrote:
> .. snip.. 
> >  static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
> >  {
> >  	struct scsi_device *sdev;
> > +	char buffer[501];
> 
> Why '501' ? How did you come up with that number?

A random 500 bytes of data plus room for a string terminator?

> > +	int rc;
> >  
> >  	if (dev->type != &scsi_dev_type)
> >  		return 0;
> >  
> >  	sdev = to_scsi_device(dev);
> >  
> > -	add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
> > +	buffer[500] = '\0';
> 
> Shouldn't that be buffer[501] ?

No, buffer[501] would be off the end of the reserved space.  The
definition char buf[501] allows you to access from buf[0] to buf[500].

James


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