Bug#1123987: UBSAN: array-index-out-of-bounds in ucsi.c

From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1123987: UBSAN: array-index-out-of-bounds in ucsi.c
Date	2026-01-17 10:50 +0100
Message-ID	<Meb6p-bbWV-3@gated-at.bofh.it> (permalink)
References	<M5VrP-5zQZ-7@gated-at.bofh.it> <Me1gJ-b5qV-3@gated-at.bofh.it> <Meb6p-bbWV-5@gated-at.bofh.it> <M5VrP-5zQZ-7@gated-at.bofh.it> <Meb6p-bbWV-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

Show all headers | View raw

Hi Pascal,

On Sat, Jan 17, 2026 at 06:37:29AM +0100, pdormeau@free.fr wrote:
> 
> Le Sat, 17 Jan 2026 00:10:39 +0100,
> Salvatore Bonaccorso <carnil@debian.org> a écrit :
> 
> >So as per upstream discussion this is a firmware bug and the issue
> >should be reported to Lenovo accordingly.
> >
> >https://lore.kernel.org/linux-usb/aWizCe9um6ZrKfbT@kuha/
> >
> >Pascal can you do that? I will close this Linux kernel.
> >
> >Regards,
> >Salvatore
> Thank you Salvatore,
> I already reported to the customer service.
> They asked me to upgrade to the latest BIOS firmware.
> Will do that soon, then report again to Lenovo if it does not solve the
> problem.

Ack!

> It is an entry level laptop and I fear they answer that they only
> support Windows. Bad luck because we have 2 other Lenovo laptops
> here that run without any problem under Linux.
> PS : I saw that a patch has been proposed as a RFC on the kernel list.
> I will also test it.

About the patch: AFAIU it won't be accepted, because it's believed
that the issue should be handled in the broken firmware. But we can
see how the thing proceeds.

Regards,
Salvatore

Back to linux.debian.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Bug#1123987: UBSAN: array-index-out-of-bounds in ucsi.c Salvatore Bonaccorso <carnil@debian.org> - 2026-01-17 10:50 +0100
  Bug#1123987: Solved: Bug#1123987: UBSAN: array-index-out-of-bounds in ucsi.c <pdormeau@free.fr> - 2026-01-17 14:30 +0100

csiph-web