linux-kernel - Re: [PATCH 0/6] tools/nolibc: fix some undefined behaviour and enable UBSAN

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Message-ID: <0527399b-acff-4452-a982-10f49144e099@paulmck-laptop>
Date: Fri, 18 Apr 2025 14:29:35 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: Thomas Weißschuh <linux@...ssschuh.net>
Cc: Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 0/6] tools/nolibc: fix some undefined behaviour and
 enable UBSAN

On Fri, Apr 18, 2025 at 11:20:29PM +0200, Thomas Weißschuh wrote:
> Hi Paul,
> 
> On 2025-04-18 10:32:27-0700, Paul E. McKenney wrote:
> > On Wed, Apr 16, 2025 at 08:40:15PM +0200, Thomas Weißschuh wrote:
> > > Fix some issues uncovered by UBSAN and enable UBSAN for nolibc-test to
> > > avoid regressions.
> > > 
> > > Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
> > 
> > Thank you, Thomas!  Are these intended to go into the current v6.15
> > release, or are you instead thinking in terms of the v6.16 merge window?
> > Either works for me, but left to myself, I would assume the v6.16
> > merge window.  ;-)
> 
> They are intended for v6.16 through the normal process.

Sounds good, and thank you for the clarification.  Plus good show on
getting them out early.  ;-)

							Thanx, Paul

> Thomas
> 
> > 
> > > ---
> > > Thomas Weißschuh (6):
> > >       tools/nolibc: add __nolibc_has_feature()
> > >       tools/nolibc: disable function sanitizer for _start_c()
> > >       tools/nolibc: properly align dirent buffer
> > >       tools/nolibc: fix integer overflow in i{64,}toa_r() and
> > >       selftests/nolibc: disable ubsan for smash_stack()
> > >       selftests/nolibc: enable UBSAN if available
> > > 
> > >  tools/include/nolibc/compiler.h              |  6 ++++++
> > >  tools/include/nolibc/crt.h                   |  5 +++++
> > >  tools/include/nolibc/dirent.h                |  1 +
> > >  tools/include/nolibc/stdlib.h                | 24 ++++++++----------------
> > >  tools/testing/selftests/nolibc/Makefile      |  3 ++-
> > >  tools/testing/selftests/nolibc/nolibc-test.c |  1 +
> > >  6 files changed, 23 insertions(+), 17 deletions(-)
> > > ---
> > > base-commit: 7c73c10b906778384843b9d3ac6c2224727bbf5c
> > > change-id: 20250416-nolibc-ubsan-028401698654
> > > 
> > > Best regards,
> > > -- 
> > > Thomas Weißschuh <linux@...ssschuh.net>
> > >