Re: [char-misc] mei: trace: treat reg parameter as string

[Greg Kroah-Hartman]

On Tue, Jan 06, 2026 at 10:59:26AM +0000, Usyskin, Alexander wrote:
> > Subject: Re: [char-misc] mei: trace: treat reg parameter as string
> > 
> > On Sun, Jan 04, 2026 at 10:20:44AM +0200, Alexander Usyskin wrote:
> > > Process the reg string parameter in secure way.
> > >
> > 
> > I'm sorry, but I don't understand this changelog text.  What exactly is
> > this doing?  Why is a string "better" than a char *?
> > 
> > thanks,
> > 
> > greg k-h
> 
> Sorry, I'm bad in changelogs, trying to improve...

It is usually the hardest part of making a code change.

> The string wrapper checks sanity of parameters and prevents internal kernel data leaks.
> Newer kernels refuse to emit event with plain char*, without the wrapper.
> See https://elixir.bootlin.com/linux/v6.19-rc3/source/kernel/trace/trace.c#L3785

Great, please take this information and rewrite this to explain the need
here and what this change is doing.

thanks,

greg k-h