wifi: ath11k: fix dfs radar event locking
authorJohan Hovold <johan+linaro@kernel.org>
Thu, 19 Oct 2023 15:31:15 +0000 (17:31 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 28 Nov 2023 17:07:09 +0000 (17:07 +0000)
commitca420ac4f9451f22347bae44b18ab47ba2c267ec
treec73867e7d8bc63f72fc823d1c0c6c6b2490ef710
parentf0ea9e4726118b6ec58d8f6acbc341b71a5795b3
wifi: ath11k: fix dfs radar event locking

commit 3b6c14833165f689cc5928574ebafe52bbce5f1e upstream.

The ath11k active pdevs are protected by RCU but the DFS radar event
handling code calling ath11k_mac_get_ar_by_pdev_id() was not marked as a
read-side critical section.

Mark the code in question as an RCU read-side critical section to avoid
any potential use-after-free issues.

Compile tested only.

Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Cc: stable@vger.kernel.org # 5.6
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20231019153115.26401-3-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/wireless/ath/ath11k/wmi.c