From: Kees Cook <kees@kernel.org>
To: Jeff Johnson <quic_jjohnson@quicinc.com>, arnd@arndb.de
Cc: linux-hardening@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>
Subject: Re: mips gcc plugin issues
Date: Wed, 19 Jun 2024 13:50:28 -0700 [thread overview]
Message-ID: <202406191343.D361BC137@keescook> (raw)
In-Reply-To: <563b8f82-9865-40ae-85d3-055b3bcda7d6@quicinc.com>
On Tue, Jun 18, 2024 at 04:41:01PM -0700, Jeff Johnson wrote:
> I'm trying to do an allmodconfig build for ARCH=mips using:
> https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/13.2.0/x86_64-gcc-13.2.0-nolibc-mips-linux.tar.gz
>
> This build dies quickly with:
> CC scripts/mod/empty.o
> cc1: error: cannot load plugin ./scripts/gcc-plugins/randomize_layout_plugin.so: ./scripts/gcc-plugins/randomize_layout_plugin.so: undefined symbol: _ZNK6frange6acceptERK14vrange_visitor
> cc1: error: cannot load plugin ./scripts/gcc-plugins/latent_entropy_plugin.so: ./scripts/gcc-plugins/latent_entropy_plugin.so: undefined symbol: _ZNK6frange6acceptERK14vrange_visitor
> CC scripts/mod/devicetable-offsets.s
> make[2]: *** [scripts/Makefile.build:244: scripts/mod/empty.o] Error 1
> make[2]: *** Waiting for unfinished jobs....
> cc1: error: cannot load plugin ./scripts/gcc-plugins/randomize_layout_plugin.so: ./scripts/gcc-plugins/randomize_layout_plugin.so: undefined symbol: _ZNK6frange6acceptERK14vrange_visitor
> cc1: error: cannot load plugin ./scripts/gcc-plugins/latent_entropy_plugin.so: ./scripts/gcc-plugins/latent_entropy_plugin.so: undefined symbol: _ZNK6frange6acceptERK14vrange_visitor
> HDRINST usr/include/linux/usb/tmc.h
> make[2]: *** [scripts/Makefile.build:117: scripts/mod/devicetable-offsets.s] Error 1
>
> I see the following in my .config:
> CONFIG_HAVE_GCC_PLUGINS=y
> CONFIG_GCC_PLUGINS=y
> CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
> CONFIG_GCC_PLUGIN_RANDSTRUCT=y
>
> So I'll turn those off, but just want to flag that this issue exists.
> Seems either the plugins should work or the allmodconfig should turn them off.
Well, the plugins work with all the other compiler versions all the
various CI systems use. :) For example, I don't see this with distro
cross compilers:
$ mipsel-linux-gnu-gcc --version
mipsel-linux-gnu-gcc (Ubuntu 12.3.0-1ubuntu1) 12.3.0
I suspect this is a problem with the kernel.org crosstool builds? I'm
CCing Arnd, who might know more about this.
-Kees
--
Kees Cook
next prev parent reply other threads:[~2024-06-19 20:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-18 23:41 mips gcc plugin issues Jeff Johnson
2024-06-19 20:50 ` Kees Cook [this message]
2024-06-19 21:12 ` Arnd Bergmann
2024-06-19 21:17 ` Kees Cook
2024-06-20 5:10 ` Arnd Bergmann
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