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Message-ID: <202010141545.1E2A393C62@keescook>
Date: Wed, 14 Oct 2020 15:46:59 -0700
From: Kees Cook <keescook@...omium.org>
To: Thomas Gleixner <tglx@...utronix.de>,
Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Masahiro Yamada <masahiroy@...nel.org>,
Sami Tolvanen <samitolvanen@...gle.com>,
Steven Rostedt <rostedt@...dmis.org>, Will Deacon <will@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Paul E. McKenney" <paulmck@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
clang-built-linux@...glegroups.com,
kernel-hardening@...ts.openwall.com, linux-arch@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kbuild@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
x86@...nel.org
Subject: Re: [PATCH v6 22/25] x86/asm: annotate indirect jumps
On Mon, Oct 12, 2020 at 05:32:00PM -0700, Sami Tolvanen wrote:
> Running objtool --vmlinux --duplicate on vmlinux.o produces a few
> warnings about indirect jumps with retpoline:
>
> vmlinux.o: warning: objtool: wakeup_long64()+0x61: indirect jump
> found in RETPOLINE build
> ...
>
> This change adds ANNOTATE_RETPOLINE_SAFE annotations to the jumps
> in assembly code to stop the warnings.
>
> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
Reviewed-by: Kees Cook <keescook@...omium.org>
This looks like it's an independent fix -- can an x86 maintainer pick
up this patch directly?
--
Kees Cook
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