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From: Mark Rutland <mark.rutland@arm.com>
To: Sami Tolvanen <samitolvanen@google.com>
Cc: linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	x86@kernel.org, Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Joao Moreira <joao@overdrivepizza.com>,
	Sedat Dilek <sedat.dilek@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	linux-hardening@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev
Subject: Re: [RFC PATCH v2 08/21] psci: Fix the function type for psci_initcall_t
Date: Tue, 17 May 2022 09:47:37 +0100	[thread overview]
Message-ID: <YoNhKaTT3EDukxXY@FVFF77S0Q05N> (raw)
In-Reply-To: <20220513202159.1550547-9-samitolvanen@google.com>

On Fri, May 13, 2022 at 01:21:46PM -0700, Sami Tolvanen wrote:
> Functions called through a psci_initcall_t pointer all have
> non-const arguments. Fix the type definition to avoid tripping
> indirect call checks with CFI_CLANG.
> 
> Reported-by: Mark Rutland <mark.rutland@arm.com>
> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

I'd prefer that we spread the `const` to each of the implementations rather
than dropping it from the type.

I have a local patch for that I can send out shortly.

Thanks,
Mark.

> ---
>  drivers/firmware/psci/psci.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
> index cfb448eabdaa..6554bf4b8c99 100644
> --- a/drivers/firmware/psci/psci.c
> +++ b/drivers/firmware/psci/psci.c
> @@ -521,7 +521,7 @@ static int __init psci_probe(void)
>  	return 0;
>  }
>  
> -typedef int (*psci_initcall_t)(const struct device_node *);
> +typedef int (*psci_initcall_t)(struct device_node *);
>  
>  /*
>   * PSCI init function for PSCI versions >=0.2
> -- 
> 2.36.0.550.gb090851708-goog
> 

  parent reply	other threads:[~2022-05-17  8:48 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-13 20:21 [RFC PATCH v2 00/21] KCFI support Sami Tolvanen
2022-05-13 20:21 ` [RFC PATCH v2 01/21] efi/libstub: Filter out CC_FLAGS_CFI Sami Tolvanen
2022-05-14 21:42   ` Kees Cook
2022-05-16 15:44     ` Sami Tolvanen
2022-05-13 20:21 ` [RFC PATCH v2 02/21] arm64/vdso: " Sami Tolvanen
2022-05-14 21:42   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 03/21] kallsyms: Ignore __kcfi_typeid_ Sami Tolvanen
2022-05-14 21:43   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 04/21] cfi: Remove CONFIG_CFI_CLANG_SHADOW Sami Tolvanen
2022-05-14 21:43   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 05/21] cfi: Drop __CFI_ADDRESSABLE Sami Tolvanen
2022-05-14 21:44   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 06/21] cfi: Switch to -fsanitize=kcfi Sami Tolvanen
2022-05-14 21:46   ` Kees Cook
2022-05-15  3:41   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 07/21] cfi: Add type helper macros Sami Tolvanen
2022-05-14 21:49   ` Kees Cook
2022-05-16 12:28     ` Rasmus Villemoes
2022-05-16 16:23       ` Sami Tolvanen
2022-05-16 16:04     ` Sami Tolvanen
2022-05-13 20:21 ` [RFC PATCH v2 08/21] psci: Fix the function type for psci_initcall_t Sami Tolvanen
2022-05-14 21:50   ` Kees Cook
2022-05-16 15:44     ` Sami Tolvanen
2022-05-17  8:47   ` Mark Rutland [this message]
2022-05-13 20:21 ` [RFC PATCH v2 09/21] arm64: Add types to indirect called assembly functions Sami Tolvanen
2022-05-14 21:50   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 10/21] arm64: Add CFI error handling Sami Tolvanen
2022-05-14 21:51   ` Kees Cook
2022-05-16 16:24     ` Sami Tolvanen
2022-05-13 20:21 ` [RFC PATCH v2 11/21] arm64: Drop unneeded __nocfi attributes Sami Tolvanen
2022-05-14 21:54   ` Kees Cook
2022-05-16 16:28     ` Sami Tolvanen
2022-05-13 20:21 ` [RFC PATCH v2 12/21] treewide: Drop function_nocfi Sami Tolvanen
2022-05-14 21:54   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 13/21] treewide: Drop WARN_ON_FUNCTION_MISMATCH Sami Tolvanen
2022-05-14 21:54   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 14/21] treewide: Drop __cficanonical Sami Tolvanen
2022-05-14 21:56   ` Kees Cook
2022-05-16 16:32     ` Sami Tolvanen
2022-05-13 20:21 ` [RFC PATCH v2 15/21] objtool: Don't warn about __cfi_ preambles falling through Sami Tolvanen
2022-05-14 21:56   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 16/21] x86/tools/relocs: Ignore __kcfi_typeid_ relocations Sami Tolvanen
2022-05-14 21:57   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 17/21] x86: Add types to indirectly called assembly functions Sami Tolvanen
2022-05-14 21:58   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 18/21] x86/purgatory: Disable CFI Sami Tolvanen
2022-05-14 21:58   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 19/21] x86/vdso: " Sami Tolvanen
2022-05-14 21:58   ` Kees Cook
2022-05-13 20:21 ` [RFC PATCH v2 20/21] x86: Add support for CONFIG_CFI_CLANG Sami Tolvanen
2022-05-14 22:02   ` Kees Cook
2022-05-16 18:57     ` Sami Tolvanen
2022-05-15  3:19   ` Kees Cook
2022-05-16  8:32   ` David Laight
2022-05-16 16:39     ` Sami Tolvanen
2022-05-16 21:32       ` David Laight
2022-05-16 21:44         ` Peter Zijlstra
2022-05-16 22:03           ` Sami Tolvanen
2022-05-17  6:44             ` Peter Zijlstra
2022-05-17 20:36               ` Sami Tolvanen
2022-05-17  7:56             ` David Laight
2022-05-16  9:54   ` Peter Zijlstra
2022-05-16 11:45     ` Peter Zijlstra
2022-05-16 12:58       ` Peter Zijlstra
2022-05-20 13:49         ` Matthew Wilcox
2022-05-16 17:15     ` Sami Tolvanen
2022-05-16 18:30       ` Peter Zijlstra
2022-05-16 19:39         ` Sami Tolvanen
2022-05-16 20:37           ` Peter Zijlstra
2022-05-25 20:02             ` Kees Cook
2022-05-16 22:59         ` Kees Cook
2022-05-17  8:05           ` Peter Zijlstra
2022-05-17  8:32             ` Joao Moreira
2022-05-17  8:40             ` Peter Zijlstra
2022-05-17  8:48               ` David Laight
2022-05-17  9:38                 ` Peter Zijlstra
2022-05-13 20:21 ` [RFC PATCH v2 21/21] init: Drop __nocfi from __init Sami Tolvanen
2022-05-14 22:03   ` Kees Cook
2022-05-16 17:16     ` Sami Tolvanen
     [not found] ` <CA+icZUWr+-HjMvY1VZf+nqjTadxSTDciux0Y5Y-+p_j4o7CmXg@mail.gmail.com>
2022-05-16 17:57   ` [RFC PATCH v2 00/21] KCFI support Sami Tolvanen
2022-05-17  7:33     ` Sedat Dilek
2022-05-17 18:49       ` Nathan Chancellor
2022-05-19  9:01         ` Sedat Dilek
2022-05-19 20:26           ` Nathan Chancellor
2022-05-19 20:41             ` Sami Tolvanen
2022-05-17  8:57 ` Peter Zijlstra
2022-05-17 20:25   ` Sami Tolvanen

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