linux-kernel - Re: [PATCH] sh: Fix build with CONFIG

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Date: Sun, 11 Feb 2024 11:39:49 +0100
From: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To: Kees Cook <keescook@...omium.org>
Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>, kernel test robot
	 <lkp@...el.com>, Rich Felker <dalias@...c.org>, Masahiro Yamada
	 <masahiroy@...nel.org>, Nicolas Schier <n.schier@....de>, 
	linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH] sh: Fix build with CONFIG_UBSAN=y

Hi Kees,

On Fri, 2024-02-02 at 12:06 +0100, John Paul Adrian Glaubitz wrote:
> > When I use GCC 13.2 (I'm specifically on Ubuntu 23.10) and the randconfig
> > linked from the report:
> > https://download.01.org/0day-ci/archive/20240131/202401310416.s8HLiLnC-lkp@intel.com/config
> > (which is notably enabling CONFIG_UBSAN=y and CONFIG_UBSAN_SHIFT=y) then I
> > see at the final link stage:
> > 
> > /usr/bin/sh4-linux-gnu-ld: arch/sh/boot/compressed/misc.o: in function `zlib_inflate_table':
> > misc.c:(.text+0x650): undefined reference to `__ubsan_handle_shift_out_of_bounds'
> > ...
> > 
> > After the patch, it's solved.
> 
> OK, let me test with gcc 13.x. My build host is currently running openSUSE Leap 15.5.

I just wanted to try reproduce the problem again with the reproducer in [1] as well
as with gcc-13.2.0, but your branch devel/overflow/ubsan-only no longer exists.

Can you tell me where to find the patches now?

Adrian

> [1] https://download.01.org/0day-ci/archive/20240131/202401310416.s8HLiLnC-lkp@intel.com/reproduce

-- 
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