linux-hardening - [PATCH RFC 0/3] powerpc/ps3: refactor strncpy usage

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Date:   Fri, 11 Aug 2023 21:19:18 +0000
From:   Justin Stitt <justinstitt@...gle.com>
To:     Geoff Levand <geoff@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     linux-hardening@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Justin Stitt <justinstitt@...gle.com>
Subject: [PATCH RFC 0/3] powerpc/ps3: refactor strncpy usage

Within this RFC-series I want to get some comments on two ideas that I
have for refactoring the current `strncpy` usage in repository.c.

When looking at `make_first_field` we see a u64 is being used to store
up to 8 bytes from a literal string. This is slightly suspect to me but
it works? In regards to `strncpy` here, it makes the code needlessly
complex imo.

Please see my two ideas to change this and let me know if any other
approaches are more reasonable.

Link: https://github.com/KSPP/linux/issues/90
Signed-off-by: Justin Stitt <justinstitt@...gle.com>
---
Justin Stitt (3):
      [RFC] powerpc/ps3: refactor strncpy usage attempt 1
      [RFC] powerpc/ps3: refactor strncpy usage attempt 2
      [RFC] powerpc/ps3: refactor strncpy usage attempt 2.5

 arch/powerpc/platforms/ps3/repository.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
base-commit: 52a93d39b17dc7eb98b6aa3edb93943248e03b2f
change-id: 20230811-strncpy-arch-powerpc-platforms-ps3-57a1cdb2ad9b

Best regards,
--
Justin Stitt <justinstitt@...gle.com>