linux-cve-announce - CVE-2024-56713: net: netdevsim: fix nsim_pp_hold

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Message-ID: <2024122914-CVE-2024-56713-f78a@gregkh>
Date: Sun, 29 Dec 2024 09:48:17 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56713: net: netdevsim: fix nsim_pp_hold_write()

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

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

net: netdevsim: fix nsim_pp_hold_write()

nsim_pp_hold_write() has two problems:

1) It may return with rtnl held, as found by syzbot.

2) Its return value does not propagate an error if any.

The Linux kernel CVE team has assigned CVE-2024-56713 to this issue.


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

	Issue introduced in 6.10 with commit 1580cbcbfe770b0a7fb76735c1a601483335c1c2 and fixed in 6.12.7 with commit 5c553262f063b3bf85df3b22a9818a8d92510f4d
	Issue introduced in 6.10 with commit 1580cbcbfe770b0a7fb76735c1a601483335c1c2 and fixed in 6.13-rc4 with commit b9b8301d369b4c876de5255dbf067b19ba88ac71

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-2024-56713
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/netdevsim/netdev.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/5c553262f063b3bf85df3b22a9818a8d92510f4d
	https://git.kernel.org/stable/c/b9b8301d369b4c876de5255dbf067b19ba88ac71