linux-cve-announce - CVE-2024-57991: wifi: rtw89: chan: fix soft lockup in rtw89_entity_recalc_mgnt

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Message-ID: <2025022638-CVE-2024-57991-a3e1@gregkh>
Date: Wed, 26 Feb 2025 18:05:50 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-57991: wifi: rtw89: chan: fix soft lockup in rtw89_entity_recalc_mgnt_roles()

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

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

wifi: rtw89: chan: fix soft lockup in rtw89_entity_recalc_mgnt_roles()

During rtw89_entity_recalc_mgnt_roles(), there is a normalizing process
which will re-order the list if an entry with target pattern is found.
And once one is found, should have aborted the list_for_each_entry. But,
`break` just aborted the inner for-loop. The outer list_for_each_entry
still continues. Normally, only the first entry will match the target
pattern, and the re-ordering will change nothing, so there won't be
soft lockup. However, in some special cases, soft lockup would happen.

Fix it by `goto fill` to break from the list_for_each_entry.

The following is a sample of kernel log for this problem.

watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [wpa_supplicant:2055]
[...]
RIP: 0010:rtw89_entity_recalc ([...] chan.c:392 chan.c:479) rtw89_core
[...]

The Linux kernel CVE team has assigned CVE-2024-57991 to this issue.


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

	Issue introduced in 6.13 with commit 68ec751b288178de7d19b71ea61648269a35b8cd and fixed in 6.13.2 with commit 01d2d34e9fcc9897081c3c16a666f793c8a38c58
	Issue introduced in 6.13 with commit 68ec751b288178de7d19b71ea61648269a35b8cd and fixed in 6.14-rc1 with commit e4790b3e314a4814f1680a5dc552031fb199b878

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-2024-57991
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/realtek/rtw89/chan.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/223ba95fdcd3c6090e2bd51dce66abb6dd4f9df9
	https://git.kernel.org/stable/c/01d2d34e9fcc9897081c3c16a666f793c8a38c58
	https://git.kernel.org/stable/c/e4790b3e314a4814f1680a5dc552031fb199b878