drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle() 漏洞信息(CVE-2022-49311)

一、漏洞 CVE-2022-49311 基础信息

AIGC 神龙大模型
美国国家漏洞数据库 NVD

漏洞标题

驱动程序:staging: rtl8192bs:修复rtw_joinbss_event_prehandle()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:N/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

drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle()

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: drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle() There is a deadlock in rtw_joinbss_event_prehandle(), which is shown below: (Thread 1) | (Thread 2) | _set_timer() rtw_joinbss_event_prehandle()| mod_timer() spin_lock_bh() //(1) | (wait a time) ... | _rtw_join_timeout_handler() del_timer_sync() | spin_lock_bh() //(2) (wait timer to stop) | ... We hold pmlmepriv->lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need pmlmepriv->lock in position (2) of thread 2. As a result, rtw_joinbss_event_prehandle() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_bh(), which could let timer handler to obtain the needed lock. What`s more, we change spin_lock_bh() to spin_lock_irq() in _rtw_join_timeout_handler() in order to prevent 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-2022-49311 的公开POC

#	POC 描述	源链接	神龙链接

三、漏洞 CVE-2022-49311 的情报信息

标题： drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle() - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle() - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle() - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： drivers: staging: rtl8192bs: Fix deadlock in rtw_joinbss_event_prehandle() - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
https://nvd.nist.gov/vuln/detail/CVE-2022-49311