linux-cve-announce - CVE-2024-44970: net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink

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Message-ID: <2024090456-CVE-2024-44970-f687@gregkh>
Date: Wed,  4 Sep 2024 20:56:57 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-44970: net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink

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

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

net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink

When all the strides in a WQE have been consumed, the WQE is unlinked
from the WQ linked list (mlx5_wq_ll_pop()). For SHAMPO, it is possible
to receive CQEs with 0 consumed strides for the same WQE even after the
WQE is fully consumed and unlinked. This triggers an additional unlink
for the same wqe which corrupts the linked list.

Fix this scenario by accepting 0 sized consumed strides without
unlinking the WQE again.

The Linux kernel CVE team has assigned CVE-2024-44970 to this issue.


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

	Fixed in 6.1.105 with commit 7b379353e914
	Fixed in 6.6.46 with commit 650e24748e1e
	Fixed in 6.10.5 with commit 50d8009a0ac0
	Fixed in 6.11-rc1 with commit fba8334721e2

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-2024-44970
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/ethernet/mellanox/mlx5/core/en_rx.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/7b379353e9144e1f7460ff15f39862012c9d0d78
	https://git.kernel.org/stable/c/650e24748e1e0a7ff91d5c72b72a2f2a452b5b76
	https://git.kernel.org/stable/c/50d8009a0ac02c3311b23a0066511f8337bd88d9
	https://git.kernel.org/stable/c/fba8334721e266f92079632598e46e5f89082f30