6.6-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan+linaro@kernel.org
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: a16d9b50cfba ("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 --- drivers/net/wireless/ath/ath11k/wmi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/ath/ath11k/wmi.c +++ b/drivers/net/wireless/ath/ath11k/wmi.c @@ -8619,12 +8619,13 @@ static void ath11k_wmi_gtk_offload_statu 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, "event gtk offload refresh_cnt %d\n", @@ -8641,6 +8642,8 @@ static void ath11k_wmi_gtk_offload_statu
ieee80211_gtk_rekey_notify(arvif->vif, arvif->bssid, (void *)&replay_ctr_be, GFP_ATOMIC); +exit: + rcu_read_unlock();
kfree(tb); }