driver core: fix deadlock in __device_attach 漏洞信息(CVE-2022-49371)

一、漏洞 CVE-2022-49371 基础信息

AIGC 神龙大模型
美国国家漏洞数据库 NVD

漏洞标题

驱动核心:修复__device_attach中的死锁问题

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

加锁机制不恰当

来源：AIGC 神龙大模型

漏洞标题

driver core: fix deadlock in __device_attach

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: driver core: fix deadlock in __device_attach In __device_attach function, The lock holding logic is as follows: ... __device_attach device_lock(dev) // get lock dev async_schedule_dev(__device_attach_async_helper, dev); // func async_schedule_node async_schedule_node_domain(func) entry = kzalloc(sizeof(struct async_entry), GFP_ATOMIC); /* when fail or work limit, sync to execute func, but __device_attach_async_helper will get lock dev as well, which will lead to A-A deadlock. */ if (!entry || atomic_read(&entry_count) > MAX_WORK) { func; else queue_work_node(node, system_unbound_wq, &entry->work) device_unlock(dev) As shown above, when it is allowed to do async probes, because of out of memory or work limit, async work is not allowed, to do sync execute instead. it will lead to A-A deadlock because of __device_attach_async_helper getting lock dev. To fix the deadlock, move the async_schedule_dev outside device_lock, as we can see, in async_schedule_node_domain, the parameter of queue_work_node is system_unbound_wq, so it can accept concurrent operations. which will also not change the code logic, and will not lead to deadlock.

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-2022-49371 的公开POC

#	POC 描述	源链接	神龙链接

三、漏洞 CVE-2022-49371 的情报信息

标题： driver core: fix deadlock in __device_attach - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： driver core: fix deadlock in __device_attach - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： driver core: fix deadlock in __device_attach - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： driver core: fix deadlock in __device_attach - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： driver core: fix deadlock in __device_attach - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： driver core: fix deadlock in __device_attach - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
https://nvd.nist.gov/vuln/detail/CVE-2022-49371