linux-hardening - Re: [PATCH] selinux: Annotate struct sidtab_str_cache with __counted

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Message-ID: <c91bb958ddbfd9b9572d51d96cd857b9.paul@paul-moore.com>
Date:   Tue, 12 Sep 2023 16:58:39 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Stephen Smalley <stephen.smalley.work@...il.com>,
        Eric Paris <eparis@...isplace.org>,
        Ondrej Mosnacek <omosnace@...hat.com>, selinux@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        "GONG, Ruiqi" <gongruiqi1@...wei.com>,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH] selinux: Annotate struct sidtab_str_cache with  __counted_by

On Aug 17, 2023 Kees Cook <keescook@...omium.org> wrote:
> 
> Prepare for the coming implementation by GCC and Clang of the __counted_by
> attribute. Flexible array members annotated with __counted_by can have
> their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
> (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
> 
> As found with Coccinelle[1], add __counted_by for struct sidtab_str_cache.
> 
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
> 
> Cc: Paul Moore <paul@...l-moore.com>
> Cc: Stephen Smalley <stephen.smalley.work@...il.com>
> Cc: Eric Paris <eparis@...isplace.org>
> Cc: Ondrej Mosnacek <omosnace@...hat.com>
> Cc: selinux@...r.kernel.org
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
>  security/selinux/ss/sidtab.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Merged into selinux/next, thanks.

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