From 3e7f5d362b2b3a21b3adb4b860aad14b69a896ad Mon Sep 17 00:00:00 2001 From: Jiale Yao Date: Sat, 3 Oct 2026 17:20:59 +0800 Subject: [PATCH] wifi: ath11k: avoid IDR mutation during pending mgmt TX cleanup The pending management TX cleanup walks txmgmt_idr with idr_for_each(), and its callback removes the current entry. This can invalidate the radix-tree iterator retained by idr_for_each(). Use idr_for_each_entry() so every iteration starts with a fresh lookup. Continue to remove each entry under txmgmt_idr_lock before freeing its skb, preventing concurrent TX completion from finding a stale skb pointer. Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices") Signed-off-by: Jiale Yao Reviewed-by: Baochen Qiang Reviewed-by: Rameshkumar Sundaram Link: https://patch.msgid.link/20261003092104.520135-3-yaojiale02@163.com Signed-off-by: Jeff Johnson --- drivers/net/wireless/ath/ath11k/core.c | 3 +-- drivers/net/wireless/ath/ath11k/mac.c | 12 ++++++------ drivers/net/wireless/ath/ath11k/mac.h | 2 +- 3 files changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c index 1ad0a47653de..766ae27306f4 100644 --- a/drivers/net/wireless/ath/ath11k/core.c +++ b/drivers/net/wireless/ath/ath11k/core.c @@ -2448,8 +2448,7 @@ void ath11k_core_pre_reconfigure_recovery(struct ath11k_base *ab) complete(&ar->thermal.wmi_sync); wake_up(&ar->dp.tx_empty_waitq); - idr_for_each(&ar->txmgmt_idr, - ath11k_mac_tx_mgmt_pending_free, ar); + ath11k_mac_tx_mgmt_pending_free(ar); idr_destroy(&ar->txmgmt_idr); wake_up(&ar->txmgmt_empty_waitq); diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c index c1fa42edd363..1ee32c7dc494 100644 --- a/drivers/net/wireless/ath/ath11k/mac.c +++ b/drivers/net/wireless/ath/ath11k/mac.c @@ -6167,13 +6167,13 @@ static void ath11k_mac_tx_mgmt_free(struct ath11k *ar, int buf_id) ath11k_mgmt_over_wmi_tx_drop(ar, msdu); } -int ath11k_mac_tx_mgmt_pending_free(int buf_id, void *skb, void *ctx) +void ath11k_mac_tx_mgmt_pending_free(struct ath11k *ar) { - struct ath11k *ar = ctx; + struct sk_buff *msdu; + int buf_id; - ath11k_mac_tx_mgmt_free(ar, buf_id); - - return 0; + idr_for_each_entry(&ar->txmgmt_idr, msdu, buf_id) + ath11k_mac_tx_mgmt_free(ar, buf_id); } static int ath11k_mac_vif_txmgmt_idr_remove(int buf_id, void *skb, void *ctx) @@ -10418,7 +10418,7 @@ static void __ath11k_mac_unregister(struct ath11k *ar) ieee80211_unregister_hw(ar->hw); - idr_for_each(&ar->txmgmt_idr, ath11k_mac_tx_mgmt_pending_free, ar); + ath11k_mac_tx_mgmt_pending_free(ar); idr_destroy(&ar->txmgmt_idr); kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels); diff --git a/drivers/net/wireless/ath/ath11k/mac.h b/drivers/net/wireless/ath/ath11k/mac.h index 59f83c7175fd..127cb476b44b 100644 --- a/drivers/net/wireless/ath/ath11k/mac.h +++ b/drivers/net/wireless/ath/ath11k/mac.h @@ -162,7 +162,7 @@ struct ath11k *ath11k_mac_get_ar_by_pdev_id(struct ath11k_base *ab, u32 pdev_id) void ath11k_mac_drain_tx(struct ath11k *ar); void ath11k_mac_peer_cleanup_all(struct ath11k *ar); -int ath11k_mac_tx_mgmt_pending_free(int buf_id, void *skb, void *ctx); +void ath11k_mac_tx_mgmt_pending_free(struct ath11k *ar); u8 ath11k_mac_bw_to_mac80211_bw(u8 bw); enum nl80211_he_gi ath11k_mac_he_gi_to_nl80211_he_gi(u8 sgi); enum nl80211_he_ru_alloc ath11k_mac_phy_he_ru_to_nl80211_he_ru_alloc(u16 ru_phy);