Groups > linux.debian.bugs.dist > #1278735

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>
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Cross-posted to 2 groups.

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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

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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

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