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Message-ID: <CAGXu5j+gHMCjxMr3k0UNBcsT6DYuALtpROxazf7YVX=SUja_cQ@mail.gmail.com>
Date: Wed, 20 Feb 2019 15:31:07 -0800
From: Kees Cook <keescook@...omium.org>
To: "Tobin C. Harding" <tobin@...nel.org>
Cc: 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 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! :)
> 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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