In the Linux kernel, the following vulnerability has been resolved: liveupdate: fix TOCTOU race...

In the Linux kernel, the following vulnerability has been resolved:

liveupdate: fix TOCTOU race in luo_session_retrieve()

Extend the scope of the rwsem_read lock in luo_session_retrieve() to overlap with the acquisition of the session mutex. This prevents a concurrent thread from releasing and freeing the session between the lookup and the mutex lock.