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From: Sami Tolvanen <samitolvanen@google.com>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: X86 ML <x86@kernel.org>, Kees Cook <keescook@chromium.org>,
	 Josh Poimboeuf <jpoimboe@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	 Nathan Chancellor <nathan@kernel.org>,
	Sedat Dilek <sedat.dilek@gmail.com>,
	 linux-hardening@vger.kernel.org,
	LKML <linux-kernel@vger.kernel.org>,
	 llvm@lists.linux.dev
Subject: Re: [PATCH v4 04/15] cfi: Add DEFINE_CFI_IMMEDIATE_RETURN_STUB
Date: Fri, 1 Oct 2021 13:07:24 -0700	[thread overview]
Message-ID: <CABCJKucX-FWcsaCt2TCY+2Y+GrKb5EKFFFsGWN8mbgZTTy8nNg@mail.gmail.com> (raw)
In-Reply-To: <CAKwvOdnN-5PBnegEpb4eq3uPWezmAO6Zrvy3O7zyCNEBFvYt4A@mail.gmail.com>

On Thu, Sep 30, 2021 at 11:50 AM Nick Desaulniers
<ndesaulniers@google.com> wrote:
>
> On Thu, Sep 30, 2021 at 11:05 AM Sami Tolvanen <samitolvanen@google.com> wrote:
> >
> > This change introduces the DEFINE_CFI_IMMEDIATE_RETURN_STUB macro,
> > which defines a stub function that immediately returns and when
> > defined in the core kernel, always passes indirect call checking
> > with CONFIG_CFI_CLANG. Note that this macro should only be used when
> > a stub cannot be called using the correct function type.
>
> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
>
> Seems like the only use is in patch 5/15. Probably could be squashed...

I would prefer to keep these separate, but if everyone thinks that's
unnecessary, I'm happy to combine them.

Sami

  reply	other threads:[~2021-10-01 20:07 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-30 18:05 [PATCH v4 00/15] x86: Add support for Clang CFI Sami Tolvanen
2021-09-30 18:05 ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 01/15] objtool: Add CONFIG_CFI_CLANG support Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:40   ` Nick Desaulniers
2021-09-30 18:40     ` Nick Desaulniers
2021-10-06  3:36   ` Josh Poimboeuf
2021-10-06 16:18     ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 02/15] objtool: Add ASM_STACK_FRAME_NON_STANDARD Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-10-06  3:37   ` Josh Poimboeuf
2021-09-30 18:05 ` [PATCH v4 03/15] linkage: Add DECLARE_ASM_FUNC_SYMBOL Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 04/15] cfi: Add DEFINE_CFI_IMMEDIATE_RETURN_STUB Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:50   ` Nick Desaulniers
2021-09-30 18:50     ` Nick Desaulniers
2021-10-01 20:07     ` Sami Tolvanen [this message]
2021-10-01 20:07       ` Sami Tolvanen
2021-10-04 13:50   ` Peter Zijlstra
2021-10-04 19:10     ` Sami Tolvanen
2021-10-05  6:59       ` Peter Zijlstra
2021-10-05 20:29         ` Sami Tolvanen
2021-10-05 20:56           ` Peter Zijlstra
2021-10-05 21:53             ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 05/15] tracepoint: Exclude tp_stub_func from CFI checking Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:50   ` Nick Desaulniers
2021-09-30 18:50     ` Nick Desaulniers
2021-10-01 20:08     ` Sami Tolvanen
2021-10-01 20:08       ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 06/15] ftrace: Use an opaque type for functions not callable from C Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-10-06  3:29   ` Josh Poimboeuf
2021-10-06 13:02     ` Steven Rostedt
2021-10-06 13:54       ` Josh Poimboeuf
2021-10-06 14:16         ` Steven Rostedt
2021-10-06 16:31       ` Sami Tolvanen
2021-10-06 16:58         ` Steven Rostedt
2021-10-06 17:45           ` Sami Tolvanen
2021-10-06 20:43             ` Josh Poimboeuf
2021-10-06 21:10               ` Steven Rostedt
2021-10-06 21:23                 ` Josh Poimboeuf
2021-10-06 23:14                   ` Sami Tolvanen
2021-10-07  0:56                     ` Steven Rostedt
2021-09-30 18:05 ` [PATCH v4 07/15] lkdtm: Disable UNSET_SMEP with CFI Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 08/15] lkdtm: Use an opaque type for lkdtm_rodata_do_nothing Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 09/15] x86: Use an opaque type for functions not callable from C Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 10/15] x86/purgatory: Disable CFI Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 19:05   ` Nick Desaulniers
2021-09-30 19:05     ` Nick Desaulniers
2021-09-30 18:05 ` [PATCH v4 11/15] x86, relocs: Ignore __typeid__ relocations Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-10-06  3:31   ` Josh Poimboeuf
2021-10-06 16:17     ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 12/15] x86, module: " Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 13/15] x86, cpu: Use LTO for cpu.c with CFI Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 14/15] x86, kprobes: Fix optprobe_template_func type mismatch Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:05 ` [PATCH v4 15/15] x86, build: Allow CONFIG_CFI_CLANG to be selected Sami Tolvanen
2021-09-30 18:05   ` Sami Tolvanen
2021-09-30 18:38 ` [PATCH v4 00/15] x86: Add support for Clang CFI Nick Desaulniers
2021-09-30 18:38   ` Nick Desaulniers
2021-10-01 20:55   ` Sedat Dilek
2021-10-01 20:55     ` Sedat Dilek
2021-10-05 20:36 ` Josh Poimboeuf
2021-10-05 21:52   ` Sami Tolvanen
2021-10-06  2:42     ` Josh Poimboeuf

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