AZL-60303
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-60303.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-60303
- Upstream
- Published
- 2025-02-26T07:01:07Z
- Modified
- 2026-04-21T04:37:24.137903Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2022-49303 affecting package kernel 5.15.200.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drivers: staging: rtl8192eu: Fix deadlock in rtwjoinbssevent_prehandle
There is a deadlock in rtwjoinbssevent_prehandle(), which is shown below:
(Thread 1) | (Thread 2) | settimer() rtwjoinbsseventprehandle()| modtimer() spinlockbh() //(1) | (wait a time) ... | rtwjointimeouthandler() | rtwjointimeouthandler() deltimersync() | spinlock_bh() //(2) (wait timer to stop) | ...
We hold pmlmepriv->lock in position (1) of thread 1 and use deltimersync() to wait timer to stop, but timer handler also need pmlmepriv->lock in position (2) of thread 2. As a result, rtwjoinbssevent_prehandle() will block forever.
This patch extracts deltimersync() from the protection of spinlockbh(), which could let timer handler to obtain the needed lock. What`s more, we change spinlockbh() to spinlockirq() in rtwjointimeouthandler() in order to prevent deadlock.
- References