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Re: [RFC 00/06] printk: add more new kernel pointer filter options.

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Hello Greg,

On (05/05/17 21:06), Greg KH wrote:
> Here's a short patch series from Chris Fries and Dave Weinstein that
> implement some new restrictions when printing out kernel pointers, as
> well as the ability to whitelist kernel pointers where needed.
> 
> These patches are based on work from William Roberts, and also is
> inspired by grsecurity's %pP to specifically whitelist a kernel pointer,
> where it is always needed, like the last patch in the series shows, in
> the UIO drivers (UIO requires that you know the address, it's a hardware
> address, nothing wrong with seeing that...)
> 
> I haven't done much to this patch series, only forward porting it from
> an older kernel release (4.4) and a few minor tweaks.  It applies
> cleanly on top of 4.11 as well as Linus's current development tree
> (10502 patches into the 4.12-rc1 merge window).  I'm posting it now for
> comments if anyone sees anything wrong with this approach

overall, I don't see anything wrong.

> or thinks the things that are being whitelisted should not be?

can't say for sure, sorry.

	-ss

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[RFC 00/06] printk: add more new kernel pointer filter options. Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 06:10 +0200
  [RFC 6/6] drivers: uio: Un-restrict sysfs pointers for UIO Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 06:10 +0200
  [RFC 5/6] lib: vsprintf: Add "%paP", "%padP" options Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 06:10 +0200
    Re: [RFC 5/6] lib: vsprintf: Add "%paP", "%padP" options Joe Perches <joe@perches.com> - 2017-05-06 06:50 +0200
      Re: [RFC 5/6] lib: vsprintf: Add "%paP", "%padP" options Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 07:10 +0200
  [RFC 4/6] lib: vsprintf: default kptr_restrict to the maximum value Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 06:10 +0200
  [RFC 1/6] lib: vsprintf: additional kernel pointer filtering options Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 06:10 +0200
  [RFC 3/6] lib: vsprintf: physical address kernel pointer filtering  options Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 06:10 +0200
    Re: [kernel-hardening] [RFC 3/6] lib: vsprintf: physical address  kernel pointer filtering options Ian Campbell <ijc@hellion.org.uk> - 2017-05-06 12:50 +0200
  [RFC 2/6] lib: vsprintf: whitelist stack traces Greg KH <gregkh@linuxfoundation.org> - 2017-05-06 06:10 +0200
  Re: [RFC 00/06] printk: add more new kernel pointer filter options. Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2017-05-11 03:40 +0200

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