CVE-2024-49976 tracing/timerlat: Drop interface_lock in stop_kthread()

In the Linux kernel, the following vulnerability has been resolved: tracing/timerlat: Drop interfacelock in stopkthread stopkthread is the offline callback for "trace/osnoise:online", since commit 5bfbcd1ee57b "tracing/timerlat: Add interfacelock around clearing of kthread in stopkthread", the...

CVE-2024-49976

CVE-2024-49976 concerns an ABBA deadlock in the Linux kernel related to timerlat/osnoise kthread handling. The issue arises because stop_kthread() (offline callback for trace/osnoise:online) could deadlock due to holding interface_lock while cpus_write_lock/cpus_read_lock paths are taken, enablin...