linux-kernel - Re: [PATCH v2 22/28] arm64: export CC_USING_PATCHABLE_FUNCTION

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200908212302.GD1060586@google.com>
Date:   Tue, 8 Sep 2020 14:23:02 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.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 v2 22/28] arm64: export CC_USING_PATCHABLE_FUNCTION_ENTRY

On Thu, Sep 03, 2020 at 03:44:18PM -0700, Kees Cook wrote:
> On Thu, Sep 03, 2020 at 01:30:47PM -0700, Sami Tolvanen wrote:
> > Since arm64 does not use -pg in CC_FLAGS_FTRACE with
> > DYNAMIC_FTRACE_WITH_REGS, skip running recordmcount by
> > exporting CC_USING_PATCHABLE_FUNCTION_ENTRY.
> > 
> > Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
> 
> How stand-alone is this? Does it depend on the earlier mcount fixes?

It does, because exporting CC_USING_PATCHABLE_FUNCTION_ENTRY doesn't
change anything without the earlier mcount changes.

Sami