linux-kernel - Re: Bug#1121535: UBSAN: array-index-out-of-bounds in [...]sound/pci/ctxfi/ctamixer.c:347:48

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Message-ID: <20251226172103.5473-1-linux@hohmatik.de>
Date: Fri, 26 Dec 2025 18:21:03 +0100
From: Karsten Hohmeier <linux@...matik.de>
To: carnil@...ian.org
Cc: 1121535@...s.debian.org,
	linux-kernel@...r.kernel.org,
	linux-sound@...r.kernel.org,
	perex@...ex.cz,
	tiwai@...e.com,
	tiwai@...e.de,
	waxhead@...tcellar.net
Subject: Re: Bug#1121535: UBSAN: array-index-out-of-bounds in [...]sound/pci/ctxfi/ctamixer.c:347:48

Hello. I am another affected user.
I applied the suggested patch by Takeshi on top of 6.18.2 (in case it got already fixed).

But this just gives

> Dez 26 17:24:13: dtest kernel: UBSAN: array-index-out-of-bounds in sound/pci/ctxfi/ctamixer.c:344:48
> Dez 26 17:24:13: dtest kernel: index 10 is out of range for type 'unsigned char [9]'

as the error. Making the struct even larger gives

> Dez 26 17:39:35 dtest kernel: UBSAN: array-index-out-of-bounds in sound/pci/ctxfi/ctamixer.c:344:48
> Dez 26 17:39:35 dtest kernel: index 32 is out of range for type 'unsigned char [32]'

Could you take another look?

Regards

Karsten