linux-cve-announce - CVE-2024-53191: wifi: ath12k: fix warning when unbinding

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Message-ID: <2024122723-CVE-2024-53191-df03@gregkh>
Date: Fri, 27 Dec 2024 14:52:37 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53191: wifi: ath12k: fix warning when unbinding

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

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

wifi: ath12k: fix warning when unbinding

If there is an error during some initialization related to firmware,
the buffers dp->tx_ring[i].tx_status are released.
However this is released again when the device is unbinded (ath12k_pci),
and we get:
WARNING: CPU: 0 PID: 2098 at mm/slub.c:4689 free_large_kmalloc+0x4d/0x80
Call Trace:
free_large_kmalloc
ath12k_dp_free
ath12k_core_deinit
ath12k_pci_remove
...

The issue is always reproducible from a VM because the MSI addressing
initialization is failing.

In order to fix the issue, just set the buffers to NULL after releasing in
order to avoid the double free.

The Linux kernel CVE team has assigned CVE-2024-53191 to this issue.


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

	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.6.64 with commit 223b546c6222d42147eff034433002ca5e2e7e09
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.11.11 with commit 90556b96338aa6037cd26dac857327fda7c19732
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.12.2 with commit 94c9100b600f05a36b33f9ed76dbd6fb0eb25386
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.13-rc1 with commit ca68ce0d9f4bcd032fd1334441175ae399642a06

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-2024-53191
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/net/wireless/ath/ath12k/dp.c


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/223b546c6222d42147eff034433002ca5e2e7e09
	https://git.kernel.org/stable/c/90556b96338aa6037cd26dac857327fda7c19732
	https://git.kernel.org/stable/c/94c9100b600f05a36b33f9ed76dbd6fb0eb25386
	https://git.kernel.org/stable/c/ca68ce0d9f4bcd032fd1334441175ae399642a06