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Takashi Iwai fdf0dc82eb ALSA: usb-audio: Fix missing unlock at error path of maxpacksize check
The recent backport of the upstream commit 05a1fc5efd ("ALSA:
usb-audio: Fix potential overflow of PCM transfer buffer") on the
older stable kernels like 6.12.y was broken since it doesn't consider
the mutex unlock, where the upstream code manages with guard().
In the older code, we still need an explicit unlock.

This is a fix that corrects the error path, applied only on old stable
trees.

Reported-by: Pavel Machek <pavel@denx.de>
Closes: https://lore.kernel.org/aSWtH0AZH5+aeb+a@duo.ucw.cz
Fixes: 98e9d5e33b ("ALSA: usb-audio: Fix potential overflow of PCM transfer buffer")
Reviewed-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-12-01 11:43:36 +01:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.