arch/arm64: Fix topology initialization for core scheduling 漏洞信息(CVE-2022-49090)

一、漏洞 CVE-2022-49090 基础信息

AIGC 神龙大模型
美国国家漏洞数据库 NVD

漏洞标题

arm/arm64架构：修正核心调度的拓扑初始化问题

来源：AIGC 神龙大模型

漏洞描述信息

N/A

来源：AIGC 神龙大模型

CVSS信息

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

来源：AIGC 神龙大模型

漏洞类别

初始化不恰当

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漏洞标题

arch/arm64: Fix topology initialization for core scheduling

来源：美国国家漏洞数据库 NVD

漏洞描述信息

In the Linux kernel, the following vulnerability has been resolved: arch/arm64: Fix topology initialization for core scheduling Arm64 systems rely on store_cpu_topology() to call update_siblings_masks() to transfer the toplogy to the various cpu masks. This needs to be done before the call to notify_cpu_starting() which tells the scheduler about each cpu found, otherwise the core scheduling data structures are setup in a way that does not match the actual topology. With smt_mask not setup correctly we bail on `cpumask_weight(smt_mask) == 1` for !leaders in: notify_cpu_starting() cpuhp_invoke_callback_range() sched_cpu_starting() sched_core_cpu_starting() which leads to rq->core not being correctly set for !leader-rq's. Without this change stress-ng (which enables core scheduling in its prctl tests in newer versions -- i.e. with PR_SCHED_CORE support) causes a warning and then a crash (trimmed for legibility): [ 1853.805168] ------------[ cut here ]------------ [ 1853.809784] task_rq(b)->core != rq->core [ 1853.809792] WARNING: CPU: 117 PID: 0 at kernel/sched/fair.c:11102 cfs_prio_less+0x1b4/0x1c4 ... [ 1854.015210] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 ... [ 1854.231256] Call trace: [ 1854.233689] pick_next_task+0x3dc/0x81c [ 1854.237512] __schedule+0x10c/0x4cc [ 1854.240988] schedule_idle+0x34/0x54

来源：美国国家漏洞数据库 NVD

CVSS信息

N/A

来源：美国国家漏洞数据库 NVD

漏洞类别

N/A

来源：美国国家漏洞数据库 NVD

二、漏洞 CVE-2022-49090 的公开POC

#	POC 描述	源链接	神龙链接

三、漏洞 CVE-2022-49090 的情报信息

标题： arch/arm64: Fix topology initialization for core scheduling - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： arch/arm64: Fix topology initialization for core scheduling - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： arch/arm64: Fix topology initialization for core scheduling - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： arch/arm64: Fix topology initialization for core scheduling - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
https://nvd.nist.gov/vuln/detail/CVE-2022-49090