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Message-ID: <f8bef08f5acf6ea9f153a07351c5b06bcc64c763.camel@physik.fu-berlin.de>
Subject: Re: [PATCH] sh: Fix build with CONFIG_UBSAN=y
From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: "Liu, Yujie" <yujie.liu@intel.com>
Cc: lkp <lkp@intel.com>, "masahiroy@kernel.org" <masahiroy@kernel.org>, 
 "dalias@libc.org" <dalias@libc.org>, "linux-sh@vger.kernel.org"
 <linux-sh@vger.kernel.org>,  "keescook@chromium.org"
 <keescook@chromium.org>, "linux-kernel@vger.kernel.org"
 <linux-kernel@vger.kernel.org>, "ysato@users.osdn.me"
 <ysato@users.osdn.me>,  "linux-hardening@vger.kernel.org"
 <linux-hardening@vger.kernel.org>, "Schier, Nicolas" <n.schier@avm.de>
Date: Fri, 01 Mar 2024 15:38:40 +0100
In-Reply-To: <e7a80eeafa9b916108ee53f2fe60524554ab0fa6.camel@intel.com>
References: <20240130232717.work.088-kees@kernel.org>
	 <494586ed5a0871cf7cfd005f513577952306a0bc.camel@physik.fu-berlin.de>
	 <fe057f57aba0f8a9040d4700d27f5bd478032925.camel@physik.fu-berlin.de>
	 <202402020228.BBEF7DAC@keescook>
	 <9fda57fc1b1ba6ad9bd6f7df3fb12674d0f4f940.camel@physik.fu-berlin.de>
	 <cd1a36a234c8fc61c5febe646ae0f05ed20ae32a.camel@physik.fu-berlin.de>
	 <202402121025.B0B6E47@keescook>
	 <178e0bebb1a85efebce1f504122ee190c068e0c9.camel@physik.fu-berlin.de>
	 <93572a771cb3a0b36a9213f18dd43c034c84cf6d.camel@physik.fu-berlin.de>
	 <e7a80eeafa9b916108ee53f2fe60524554ab0fa6.camel@intel.com>
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Hi Yujie,

On Fri, 2024-03-01 at 05:46 +0000, Liu, Yujie wrote:
> On Wed, 2024-02-14 at 13:52 +0100, John Paul Adrian Glaubitz wrote:
> > Hi Kees,
> >=20
> > On Mon, 2024-02-12 at 19:45 +0100, John Paul Adrian Glaubitz wrote:
> > > On Mon, 2024-02-12 at 10:26 -0800, Kees Cook wrote:
> > > > > I just wanted to try reproduce the problem again with the reprodu=
cer in [1] as well
> > > > > as with gcc-13.2.0, but your branch devel/overflow/ubsan-only no =
longer exists.
> > > > >=20
> > > > > Can you tell me where to find the patches now?
> > > >=20
> > > > Sure, they're in -next, but for an -rc2 based tree, see:
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/log/=
?h=3Dfor-next/kspp
> > >=20
> > > OK, thanks. I will give it a try with gcc-13.
> >=20
> > I'm still unable to reproduce the error that the kernel test robot repo=
rted.
> >=20
> > I'm using gcc-13:
> >=20
> > glaubitz@node54:/data/home/glaubitz/linux-kees> sh4-linux-gcc
> > sh4-linux-gcc: fatal error: no input files
> > compilation terminated.
> > glaubitz@node54:/data/home/glaubitz/linux-kees> sh4-linux-gcc --version
> > sh4-linux-gcc (GCC) 13.2.0
> > Copyright (C) 2023 Free Software Foundation, Inc.
> > This is free software; see the source for copying conditions.=C2=A0 The=
re is NO
> > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURP=
OSE.
> >=20
> > glaubitz@node54:/data/home/glaubitz/linux-kees>
> >=20
> > I checked out your tree and the for-next/kspp branch.
> >=20
> > Then fetched the config that triggered the bug like this:
> >=20
> > $ wget https://download.01.org/0day-ci/archive/20240131/202401310416.s8=
HLiLnC-lkp@intel.com/config=C2=A0-O .config
> >=20
> > Building the kernel with "make -j32 uImage" works fine. No errors excep=
t for
> > some unreleated warnings that still need to be fixed.
>=20
> Sorry for late reply. Seems like the warnings can be reproduced by
> "make zImage" which is the default make target, but cannot be
> reproduced by "make uImage".
>=20
> HEAD is now at 918327e9b7ffb ubsan: Remove CONFIG_UBSAN_SANITIZE_ALL
>=20
> $ wget https://download.01.org/0day-ci/archive/20240131/202401310416.s8HL=
iLnC-lkp@intel.com/config -O .config
> $ sh4-linux-gcc --version
> sh4-linux-gcc (GCC) 13.2.0
>=20
> $ make -j72 CROSS_COMPILE=3Dsh4-linux- ARCH=3Dsh olddefconfig
> $ make -j72 CROSS_COMPILE=3Dsh4-linux- ARCH=3Dsh
> ...
>   LD      arch/sh/boot/compressed/vmlinux
> sh4-linux-ld: arch/sh/boot/compressed/misc.o: in function `zlib_inflate_t=
able':
> misc.c:(.text+0x670): undefined reference to `__ubsan_handle_shift_out_of=
_bounds'
> sh4-linux-ld: arch/sh/boot/compressed/misc.o: in function `inflate_fast':
> misc.c:(.text+0xc5c): undefined reference to `__ubsan_handle_shift_out_of=
_bounds'
> sh4-linux-ld: arch/sh/boot/compressed/misc.o: in function `zlib_inflateRe=
set':
> misc.c:(.text+0xd00): undefined reference to `__ubsan_handle_shift_out_of=
_bounds'
> sh4-linux-ld: arch/sh/boot/compressed/misc.o: in function `zlib_inflate':
> misc.c:(.text+0x23fc): undefined reference to `__ubsan_handle_shift_out_o=
f_bounds'
> sh4-linux-ld: arch/sh/boot/compressed/ashldi3.o: in function `__ashldi3':
> ashldi3.c:(.text+0xc8): undefined reference to `__ubsan_handle_shift_out_=
of_bounds'
> make[3]: *** [arch/sh/boot/compressed/Makefile:38: arch/sh/boot/compresse=
d/vmlinux] Error 1
> make[2]: *** [arch/sh/boot/Makefile:40: arch/sh/boot/compressed/vmlinux] =
Error 2
> make[1]: *** [arch/sh/Makefile:170: zImage] Error 2
> make: *** [Makefile:240: __sub-make] Error 2
>=20
> $ make -j72 CROSS_COMPILE=3Dsh4-linux- ARCH=3Dsh uImage
> ...
>   OBJCOPY arch/sh/boot/vmlinux.bin
>   GZIP    arch/sh/boot/vmlinux.bin.gz
>   UIMAGE  arch/sh/boot/uImage.gz
> Image Name:   Linux-6.8.0-rc2+
> Created:      Fri Mar  1 13:31:36 2024
> Image Type:   SuperH Linux Kernel Image (gzip compressed)
> Data Size:    9297141 Bytes =3D 9079.24 KiB =3D 8.87 MiB
> Load Address: 08001000
> Entry Point:  08002000
>   Image arch/sh/boot/uImage is ready

Thanks a lot for pointing this out. This explains the problem.

I will have another look over the weekend and acknowledge the patch if Kees=
 wants
to pick it up through his own tree.

Adrian

--=20
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913