From: Takashi Iwai <tiwai@suse.de>
To: SeungJu Cheon <suunj1331@gmail.com>
Cc: clemens@ladisch.de, perex@perex.cz, tiwai@suse.com,
linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, me@brighamcampbell.com,
skhan@linuxfoundation.org, linux-kernel-mentees@lists.linux.dev
Subject: Re: [PATCH] sound: ua101: fix division by zero at probe
Date: Mon, 27 Apr 2026 14:24:53 +0200 [thread overview]
Message-ID: <877bpszj3e.wl-tiwai@suse.de> (raw)
In-Reply-To: <20260426111239.103296-1-suunj1331@gmail.com>
On Sun, 26 Apr 2026 13:12:39 +0200,
SeungJu Cheon wrote:
>
> Add a missing sanity check for bNrChannels in detect_usb_format()
> to prevent a division by zero in playback_urb_complete() and
> capture_urb_complete().
>
> USB core does not validate class-specific descriptor fields such
> as bNrChannels, so drivers must verify them before use. If a
> device provides bNrChannels = 0, frame_bytes becomes zero and is
> later used as a divisor in the URB completion handlers, leading
> to a kernel crash.
>
> Fixes: 63978ab3e3e9 ("sound: add Edirol UA-101 support")
> Cc: stable@vger.kernel.org
> Signed-off-by: SeungJu Cheon <suunj1331@gmail.com>
Thanks, applied now.
Takashi
next prev parent reply other threads:[~2026-04-27 12:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-26 11:12 [PATCH] sound: ua101: fix division by zero at probe SeungJu Cheon
2026-04-27 12:24 ` Takashi Iwai [this message]
2026-04-27 12:46 ` M.samet Duman
-- strict thread matches above, loose matches on Subject: below --
2021-10-26 9:54 Johan Hovold
2021-10-26 9:54 ` Johan Hovold
2021-10-27 6:23 ` Takashi Iwai
2021-10-27 6:23 ` Takashi Iwai
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