linux-cve-announce - CVE-2024-56730: net/9p/usbg: fix handling of the failed kzalloc() memory allocation

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Message-ID: <2024122924-CVE-2024-56730-3e54@gregkh>
Date: Sun, 29 Dec 2024 12:29:31 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56730: net/9p/usbg: fix handling of the failed kzalloc() memory allocation

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

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

net/9p/usbg: fix handling of the failed kzalloc() memory allocation

On the linux-next, next-20241108 vanilla kernel, the coccinelle tool gave the
following error report:

./net/9p/trans_usbg.c:912:5-11: ERROR: allocation function on line 911 returns
NULL not ERR_PTR on failure

kzalloc() failure is fixed to handle the NULL return case on the memory exhaustion.

The Linux kernel CVE team has assigned CVE-2024-56730 to this issue.


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

	Issue introduced in 6.12 with commit a3be076dc174d9022a71a12554feb4c97b5c4d5c and fixed in 6.12.2 with commit 2cdb416de8b5795fd25fadcb69e1198b6df6d8cc
	Issue introduced in 6.12 with commit a3be076dc174d9022a71a12554feb4c97b5c4d5c and fixed in 6.13-rc1 with commit ff1060813d9347e8c45c8b8cff93a4dfdb6726ad

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-2024-56730
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:
	net/9p/trans_usbg.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/2cdb416de8b5795fd25fadcb69e1198b6df6d8cc
	https://git.kernel.org/stable/c/ff1060813d9347e8c45c8b8cff93a4dfdb6726ad