linux-cve-announce - CVE-2023-53013: ptdma: pt_core_execute

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Message-ID: <2025032715-CVE-2023-53013-58dc@gregkh>
Date: Thu, 27 Mar 2025 17:44:00 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2023-53013: ptdma: pt_core_execute_cmd() should use spinlock

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

ptdma: pt_core_execute_cmd() should use spinlock

The interrupt handler (pt_core_irq_handler()) of the ptdma
driver can be called from interrupt context. The code flow
in this function can lead down to pt_core_execute_cmd() which
will attempt to grab a mutex, which is not appropriate in
interrupt context and ultimately leads to a kernel panic.
The fix here changes this mutex to a spinlock, which has
been verified to resolve the issue.

The Linux kernel CVE team has assigned CVE-2023-53013 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 5.15 with commit fa5d823b16a9442d609617abeec31da8b6afa224 and fixed in 5.15.91 with commit ed0d8f731e0bf1bb12a7a37698ac613db20e2794
	Issue introduced in 5.15 with commit fa5d823b16a9442d609617abeec31da8b6afa224 and fixed in 6.1.9 with commit 13ba563c2c8055ba8a637c9f70bb833b43cb4207
	Issue introduced in 5.15 with commit fa5d823b16a9442d609617abeec31da8b6afa224 and fixed in 6.2 with commit 95e5fda3b5f9ed8239b145da3fa01e641cf5d53c

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2023-53013
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/dma/ptdma/ptdma-dev.c
	drivers/dma/ptdma/ptdma.h


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/ed0d8f731e0bf1bb12a7a37698ac613db20e2794
	https://git.kernel.org/stable/c/13ba563c2c8055ba8a637c9f70bb833b43cb4207
	https://git.kernel.org/stable/c/95e5fda3b5f9ed8239b145da3fa01e641cf5d53c