rtmutex: Drop rt_mutex::wait_lock before scheduling
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: rtmutex: Drop rt_mutex::wait_lock before scheduling rt_mutex_handle_deadlock() is called with rt_mutex::wait_lock held. In the good case it returns with the lock held and in the deadlock case it emits a warning and goes into an endless scheduling loop with the lock held, which triggers the 'scheduling in atomic' warning. Unlock rt_mutex::wait_lock in the dead lock case before issuing the warning and dropping into the schedule for ever loop. [ tglx: Moved unlock before the WARN(), removed the pointless comment, massaged changelog, added Fixes tag ]
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://git.kernel.org/stable/c/432efdbe7da5ecfcbc0c2180cfdbab1441752a38
- https://git.kernel.org/stable/c/6a976e9a47e8e5b326de671811561cab12e6fb1f
- https://git.kernel.org/stable/c/1401da1486dc1cdbef6025fd74a3977df3a3e5d0
- https://git.kernel.org/stable/c/93f44655472d9cd418293d328f9d141ca234ad83
- https://git.kernel.org/stable/c/a92d81c9efec9280681c27a2c0a963fd0f1338e0
- https://git.kernel.org/stable/c/85f03ca98e07cd0786738b56ae73740bce0ac27f
- https://git.kernel.org/stable/c/f13b5afc5c4889569d84c3011ce449f61fccfb28
- https://git.kernel.org/stable/c/d33d26036a0274b472299d7dcdaa5fb34329f91b
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Weaknesses (CWE)
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