CVE-2023-52776

In the Linux kernel, the following vulnerability has been resolved: wifi:
ath12k: fix dfs-radar and temperature event locking The ath12k active pdevs
are protected by RCU but the DFS-radar and temperature event handling code
calling ath12k_mac_get_ar_by_pdev_id() was not marked as a read-side
critical section. Mark the code in question as RCU read-side critical
sections to avoid any potential use-after-free issues. Note that the
temperature event handler looks like a place holder currently but would
still trigger an RCU lockdep splat. Compile tested only.