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From: Greg KH <gregkh@linuxfoundation.org>
To: kernel-hardening@lists.openwall.com
Subject: Re: [kernel-hardening] Kernel Self Protection Project
Date: Fri, 6 Nov 2015 11:42:02 -0800	[thread overview]
Message-ID: <20151106194202.GB9437@kroah.com> (raw)
In-Reply-To: <CAEXv5_g07h_LhAx0M_xS5Km7kzrFXf7R-tbdhzcYicZna+pjkg@mail.gmail.com>

On Thu, Nov 05, 2015 at 04:14:22PM -0500, David Windsor wrote:
> I also proposed a patch for adding overflow protection to kref [2], but that
> patch was ultimately shot down.  Point being, I have some related patches
> laying around that directly relate to refcount-based protection which might be
> useful here. 

It was "shot down" because you crashed the system with your patch, which
isn't ok, it is a recoverable issue, and no one resent it in a version
that didn't do this.

Also, I'm not quite sure of what exactly you are trying to protect here
with a kref overflow patch, the threat-model you are going after was
never documented.

thanks,

greg k-h

  parent reply	other threads:[~2015-11-06 19:42 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-05 20:59 [kernel-hardening] Kernel Self Protection Project Kees Cook
2015-11-05 21:14 ` David Windsor
2015-11-06 19:37   ` Kees Cook
2015-11-06 19:42   ` Greg KH [this message]
2015-11-06 13:28 ` Yves-Alexis Perez
2015-11-06 18:11   ` Kees Cook
2015-11-06 18:32     ` Richard Weinberger
2015-11-08 10:39     ` Yves-Alexis Perez
2015-11-06 16:00 ` [kernel-hardening] " Quentin Casasnovas
2015-11-06 18:15   ` Kees Cook
2015-11-07  9:52     ` Quentin Casasnovas
2015-11-08  6:50       ` Kees Cook
2015-11-08 10:45         ` Quentin Casasnovas
2015-11-09 21:29           ` Kees Cook
2015-11-09 21:44         ` Valdis.Kletnieks
2015-11-09 21:55           ` David Windsor
2015-11-09 23:35             ` Kees Cook
2015-11-10  8:32             ` Quentin Casasnovas
2015-11-09 23:36           ` Kees Cook
2015-11-09 10:02       ` Rasmus Villemoes
2015-11-09 10:33         ` Quentin Casasnovas
2015-11-09 19:24           ` Rasmus Villemoes
2015-11-09 21:34             ` Kees Cook
2015-11-09 21:59               ` [kernel-hardening] Binary blobs HacKurx
2015-11-09 22:20                 ` Valdis.Kletnieks
2015-11-09 23:33                   ` Kees Cook
2015-11-13  8:04                   ` HacKurx
2015-11-13  8:07                     ` Daniel Micay
2015-11-13  8:55                       ` HacKurx
2015-11-06 21:27 ` [kernel-hardening] Kernel Self Protection Project Mickaël Salaün
2015-11-06 22:04   ` Kees Cook

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