CVE-2023-52776: wifi: ath12k: fix dfs-radar and temperature event locking

First published: Tue May 21 2024(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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