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wifi: ath11k: fix gtk offload status event locking

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commit 1dea3c0720a146bd7193969f2847ccfed5be2221 upstream.

The ath11k active pdevs are protected by RCU but the gtk offload status
event handling code calling ath11k_mac_get_arvif_by_vdev_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: a16d9b50cf ("ath11k: support GTK rekey offload")
Cc: stable@vger.kernel.org      # 5.18
Cc: Carl Huang <quic_cjhuang@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20231019155342.31631-1-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2023-10-19 17:53:42 +02:00 • committed by Greg Kroah-Hartman
parent e3199b3fac
commit 0cf7577b6b
1 changed files with 5 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

7
drivers/net/wireless/ath/ath11k/wmi.c
View file

@ -8001,12 +8001,13 @@ static void ath11k_wmi_gtk_offload_status_event(struct ath11k_base *ab,
return;
}
rcu_read_lock();
arvif = ath11k_mac_get_arvif_by_vdev_id(ab, ev->vdev_id);
if (!arvif) {
ath11k_warn(ab, "failed to get arvif for vdev_id:%d\n",
ev->vdev_id);
kfree(tb);
return;
goto exit;
}
ath11k_dbg(ab, ATH11K_DBG_WMI, "wmi gtk offload event refresh_cnt %d\n",
@ -8023,6 +8024,8 @@ static void ath11k_wmi_gtk_offload_status_event(struct ath11k_base *ab,
ieee80211_gtk_rekey_notify(arvif->vif, arvif->bssid,
(void *)&replay_ctr_be, GFP_ATOMIC);
exit:
rcu_read_unlock();
kfree(tb);
}