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Date: Thu, 21 Feb 2019 16:15:00 +1100
From: "Tobin C. Harding" <me@...in.cc>
To: Kees Cook <keescook@...omium.org>
Cc: "Tobin C. Harding" <tobin@...nel.org>, Shuah Khan <shuah@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/6] lib: Add safe string funtions
On Wed, Feb 20, 2019 at 03:31:07PM -0800, Kees Cook wrote:
> On Mon, Feb 18, 2019 at 3:24 PM Tobin C. Harding <tobin@...nel.org> wrote:
> > During your talk at LCA you mentioned that we could do with a couple
> > more safe string functions. One to zero the tail of the destination
> > buffer after call to strscpy() and also the self explanatory
> > strscpy_from_user().
>
> Thanks for jumping in with this! :)
Good to be working with you again.
> > I couldn't work out if this is a false positive or not? Does the new
> > config option CONFIG_TEST_STRING need more documentation? I don't see
> > where extra docs should be added and it seems self explanatory as is.
>
> Usually this just means the help string in Kconfig is "too short".
> Sometimes this is a false positive -- really up to you if you think it
> needs more. :)
Cool, thanks.
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