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From: Kees Cook <keescook@chromium.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Russell King <linux@armlinux.org.uk>,
	Sami Tolvanen <samitolvanen@google.com>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Ard Biesheuvel <ardb@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev
Subject: Re: [PATCH 0/7] CFI for ARM32 using LLVM
Date: Mon, 26 Feb 2024 17:06:09 -0800	[thread overview]
Message-ID: <202402261703.695B87E6@keescook> (raw)
In-Reply-To: <20240225-arm32-cfi-v1-0-6943306f065b@linaro.org>

On Sun, Feb 25, 2024 at 09:08:09PM +0100, Linus Walleij wrote:
> This is a first patch set to support CLANG CFI (Control Flow
> Integrity) on ARM32.

Yay!

Is CONFIG_CFI_PERMISSIVE=y expected to work with this series?

I wasn't able to build with CONFIG_FTRACE=y; I got this link error:

ld.lld: error: undefined symbol: ftrace_stub_graph

(FWIW, I'm building against v6.8-rc2, maybe I need a different base?)

But yes, I can boot and prototype mismatches are caught. Whee! :)

Tested-by: Kees Cook <keescook@chromium.org>

-Kees

-- 
Kees Cook

WARNING: multiple messages have this Message-ID (diff)
From: Kees Cook <keescook@chromium.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Russell King <linux@armlinux.org.uk>,
	Sami Tolvanen <samitolvanen@google.com>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Ard Biesheuvel <ardb@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev
Subject: Re: [PATCH 0/7] CFI for ARM32 using LLVM
Date: Mon, 26 Feb 2024 17:06:09 -0800	[thread overview]
Message-ID: <202402261703.695B87E6@keescook> (raw)
In-Reply-To: <20240225-arm32-cfi-v1-0-6943306f065b@linaro.org>

On Sun, Feb 25, 2024 at 09:08:09PM +0100, Linus Walleij wrote:
> This is a first patch set to support CLANG CFI (Control Flow
> Integrity) on ARM32.

Yay!

Is CONFIG_CFI_PERMISSIVE=y expected to work with this series?

I wasn't able to build with CONFIG_FTRACE=y; I got this link error:

ld.lld: error: undefined symbol: ftrace_stub_graph

(FWIW, I'm building against v6.8-rc2, maybe I need a different base?)

But yes, I can boot and prototype mismatches are caught. Whee! :)

Tested-by: Kees Cook <keescook@chromium.org>

-Kees

-- 
Kees Cook

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2024-02-27  1:06 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-25 20:08 [PATCH 0/7] CFI for ARM32 using LLVM Linus Walleij
2024-02-25 20:08 ` Linus Walleij
2024-02-25 20:08 ` [PATCH 1/7] ARM: Support CLANG CFI Linus Walleij
2024-02-25 20:08   ` Linus Walleij
2024-02-25 20:08 ` [PATCH 2/7] ARM: tlbflush: Make TLB flushes into static inlines Linus Walleij
2024-02-25 20:08   ` Linus Walleij
2024-02-25 20:08 ` [PATCH 3/7] ARM: bugs: Check in the vtable instead of defined aliases Linus Walleij
2024-02-25 20:08   ` Linus Walleij
2024-02-25 20:08 ` [PATCH 4/7] ARM: proc: Use inlines instead of defines Linus Walleij
2024-02-25 20:08   ` Linus Walleij
2024-02-25 20:08 ` [PATCH 5/7] ARM: delay: Turn delay functions into static inlines Linus Walleij
2024-02-25 20:08   ` Linus Walleij
2024-02-25 20:08 ` [PATCH 6/7] ARM: turn CPU cache flush " Linus Walleij
2024-02-25 20:08   ` Linus Walleij
2024-02-25 20:08 ` [PATCH 7/7] ARM: page: Turn highpage accesses " Linus Walleij
2024-02-25 20:08   ` Linus Walleij
2024-02-27  1:06 ` Kees Cook [this message]
2024-02-27  1:06   ` [PATCH 0/7] CFI for ARM32 using LLVM Kees Cook
2024-02-27 13:48   ` Linus Walleij
2024-02-27 13:48     ` Linus Walleij
2024-02-27 17:43     ` Sami Tolvanen
2024-02-27 17:43       ` Sami Tolvanen
2024-03-02  8:46       ` Linus Walleij
2024-03-02  8:46         ` Linus Walleij
2024-02-27 18:01     ` Kees Cook
2024-02-27 18:01       ` Kees Cook
2024-02-27  4:21 ` Nathan Chancellor
2024-02-27  4:21   ` Nathan Chancellor
2024-02-27 14:16   ` Linus Walleij
2024-02-27 14:16     ` Linus Walleij

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