linux-cve-announce - CVE-2024-57933: gve: guard XSK operations on the existence of queues

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Message-ID: <2025012148-CVE-2024-57933-aa3e@gregkh>
Date: Tue, 21 Jan 2025 13:01:47 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-57933: gve: guard XSK operations on the existence of queues

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

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

gve: guard XSK operations on the existence of queues

This patch predicates the enabling and disabling of XSK pools on the
existence of queues. As it stands, if the interface is down, disabling
or enabling XSK pools would result in a crash, as the RX queue pointer
would be NULL. XSK pool registration will occur as part of the next
interface up.

Similarly, xsk_wakeup needs be guarded against queues disappearing
while the function is executing, so a check against the
GVE_PRIV_FLAGS_NAPI_ENABLED flag is added to synchronize with the
disabling of the bit and the synchronize_net() in gve_turndown.

The Linux kernel CVE team has assigned CVE-2024-57933 to this issue.


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

	Issue introduced in 6.4 with commit fd8e40321a12391e6f554cc637d0c4b6109682a9 and fixed in 6.6.70 with commit 771d66f2bd8c4dba1286a9163ab982cecd825718
	Issue introduced in 6.4 with commit fd8e40321a12391e6f554cc637d0c4b6109682a9 and fixed in 6.12.9 with commit 8e8d7037c89437af12725f454e2eaf40e8166c0f
	Issue introduced in 6.4 with commit fd8e40321a12391e6f554cc637d0c4b6109682a9 and fixed in 6.13 with commit 40338d7987d810fcaa95c500b1068a52b08eec9b

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-2024-57933
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/google/gve/gve_main.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/771d66f2bd8c4dba1286a9163ab982cecd825718
	https://git.kernel.org/stable/c/8e8d7037c89437af12725f454e2eaf40e8166c0f
	https://git.kernel.org/stable/c/40338d7987d810fcaa95c500b1068a52b08eec9b