Ksawlii/kernel_samsung_a53x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

wifi: ath11k: fix dfs radar event locking

Browse source 
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>
This commit is contained in:
Johan Hovold 2023-10-19 17:31:15 +02:00 committed by Ksawlii
parent 819a96500d
commit 9b6b736b34
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/net/wireless/ath/ath11k/wmi.c
View file

@ -6355,6 +6355,8 @@ ath11k_wmi_pdev_dfs_radar_detected_event(struct ath11k_base *ab, struct sk_buff
ev->detector_id, ev->segment_id, ev->timestamp, ev->is_chirp,
ev->freq_offset, ev->sidx);
rcu_read_lock();
ar = ath11k_mac_get_ar_by_pdev_id(ab, ev->pdev_id);
if (!ar) {
@ -6372,6 +6374,8 @@ ath11k_wmi_pdev_dfs_radar_detected_event(struct ath11k_base *ab, struct sk_buff
ieee80211_radar_detected(ar->hw);
exit:
rcu_read_unlock();
kfree(tb);
}