From: Takashi Iwai <tiwai@suse.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
stable <stable@kernel.org>
Subject: Re: [PATCH] ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0
Date: Thu, 09 Apr 2026 16:41:36 +0200 [thread overview]
Message-ID: <87h5pki4bj.wl-tiwai@suse.de> (raw)
In-Reply-To: <2026040955-fall-gaining-e338@gregkh>
On Thu, 09 Apr 2026 16:01:56 +0200,
Greg Kroah-Hartman wrote:
>
> A malicious USB device with the TASCAM US-144MKII device id can have a
> configuration containing bInterfaceNumber=1 but no interface 0. USB
> configuration descriptors are not required to assign interface numbers
> sequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will
> then be dereferenced directly.
>
> Fix this up by checking the return value properly.
>
> Cc: Jaroslav Kysela <perex@perex.cz>
> Cc: Takashi Iwai <tiwai@suse.com>
> Fixes: dee1bcf28a3d ("ALSA: usx2y: Add native ALSA driver for TASCAM US-144MKII")
> Cc: stable <stable@kernel.org>
> Assisted-by: gregkh_clanker_t1000
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Applied to for-next branch now. Thanks.
Takashi
prev parent reply other threads:[~2026-04-09 14:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-09 14:01 [PATCH] ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0 Greg Kroah-Hartman
2026-04-09 14:41 ` Takashi Iwai [this message]
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