linux-cve-announce - CVE-2022-49885: ACPI: APEI: Fix integer overflow in ghes_estatus_pool

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Message-ID: <2025050156-CVE-2022-49885-efae@gregkh>
Date: Thu,  1 May 2025 16:11:15 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-49885: ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init()

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init()

Change num_ghes from int to unsigned int, preventing an overflow
and causing subsequent vmalloc() to fail.

The overflow happens in ghes_estatus_pool_init() when calculating
len during execution of the statement below as both multiplication
operands here are signed int:

len += (num_ghes * GHES_ESOURCE_PREALLOC_MAX_SIZE);

The following call trace is observed because of this bug:

[    9.317108] swapper/0: vmalloc error: size 18446744071562596352, exceeds total pages, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=/,mems_allowed=0-1
[    9.317131] Call Trace:
[    9.317134]  <TASK>
[    9.317137]  dump_stack_lvl+0x49/0x5f
[    9.317145]  dump_stack+0x10/0x12
[    9.317146]  warn_alloc.cold+0x7b/0xdf
[    9.317150]  ? __device_attach+0x16a/0x1b0
[    9.317155]  __vmalloc_node_range+0x702/0x740
[    9.317160]  ? device_add+0x17f/0x920
[    9.317164]  ? dev_set_name+0x53/0x70
[    9.317166]  ? platform_device_add+0xf9/0x240
[    9.317168]  __vmalloc_node+0x49/0x50
[    9.317170]  ? ghes_estatus_pool_init+0x43/0xa0
[    9.317176]  vmalloc+0x21/0x30
[    9.317177]  ghes_estatus_pool_init+0x43/0xa0
[    9.317179]  acpi_hest_init+0x129/0x19c
[    9.317185]  acpi_init+0x434/0x4a4
[    9.317188]  ? acpi_sleep_proc_init+0x2a/0x2a
[    9.317190]  do_one_initcall+0x48/0x200
[    9.317195]  kernel_init_freeable+0x221/0x284
[    9.317200]  ? rest_init+0xe0/0xe0
[    9.317204]  kernel_init+0x1a/0x130
[    9.317205]  ret_from_fork+0x22/0x30
[    9.317208]  </TASK>

[ rjw: Subject and changelog edits ]

The Linux kernel CVE team has assigned CVE-2022-49885 to this issue.


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

	Fixed in 5.10.154 with commit 9edf20e5a1d805855e78f241cf221d741b50d482
	Fixed in 5.15.78 with commit c50ec15725e005e9fb20bce69b6c23b135a4a9b7
	Fixed in 6.0.8 with commit 4c10c854113720cbfe75d4f51db79b700a629e73
	Fixed in 6.1 with commit 43d2748394c3feb86c0c771466f5847e274fc043

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-2022-49885
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/acpi/apei/ghes.c
	include/acpi/ghes.h


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/9edf20e5a1d805855e78f241cf221d741b50d482
	https://git.kernel.org/stable/c/c50ec15725e005e9fb20bce69b6c23b135a4a9b7
	https://git.kernel.org/stable/c/4c10c854113720cbfe75d4f51db79b700a629e73
	https://git.kernel.org/stable/c/43d2748394c3feb86c0c771466f5847e274fc043