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Date: Wed, 20 Feb 2019 15:31:07 -0800
From: Kees Cook <>
To: "Tobin C. Harding" <>
Cc: Shuah Khan <>, 
	Alexander Shishkin <>, 
	Greg Kroah-Hartman <>, 
	Andy Shevchenko <>, 
	Kernel Hardening <>, LKML <>
Subject: Re: [PATCH 0/6] lib: Add safe string funtions

On Mon, Feb 18, 2019 at 3:24 PM Tobin C. Harding <> 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! :)

> 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. :)

On to individual patches...

Kees Cook

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