From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sriram R <quic_srirrama@quicinc.com>,
Kalle Valo <kvalo@codeaurora.org>,
Sasha Levin <sashal@kernel.org>,
kvalo@kernel.org, davem@davemloft.net, kuba@kernel.org,
ath11k@lists.infradead.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 067/188] ath11k: Avoid NULL ptr access during mgmt tx cleanup
Date: Mon, 17 Jan 2022 21:29:51 -0500 [thread overview]
Message-ID: <20220118023152.1948105-67-sashal@kernel.org> (raw)
In-Reply-To: <20220118023152.1948105-1-sashal@kernel.org>
From: Sriram R <quic_srirrama@quicinc.com>
[ Upstream commit a93789ae541c7d5c1c2a4942013adb6bcc5e2848 ]
Currently 'ar' reference is not added in skb_cb during
WMI mgmt tx. Though this is generally not used during tx completion
callbacks, on interface removal the remaining idr cleanup callback
uses the ar ptr from skb_cb from mgmt txmgmt_idr. Hence
fill them during tx call for proper usage.
Also free the skb which is missing currently in these
callbacks.
Crash_info:
[19282.489476] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[19282.489515] pgd = 91eb8000
[19282.496702] [00000000] *pgd=00000000
[19282.502524] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[19282.783728] PC is at ath11k_mac_vif_txmgmt_idr_remove+0x28/0xd8 [ath11k]
[19282.789170] LR is at idr_for_each+0xa0/0xc8
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.5.0.1-00729-QCAHKSWPL_SILICONZ-3 v2
Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1637832614-13831-1-git-send-email-quic_srirrama@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath11k/mac.c | 35 +++++++++++++++------------
1 file changed, 20 insertions(+), 15 deletions(-)
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index 89a64ebd620f3..8ea851013bb7a 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <net/mac80211.h>
@@ -4131,23 +4132,32 @@ static int __ath11k_set_antenna(struct ath11k *ar, u32 tx_ant, u32 rx_ant)
return 0;
}
-int ath11k_mac_tx_mgmt_pending_free(int buf_id, void *skb, void *ctx)
+static void ath11k_mac_tx_mgmt_free(struct ath11k *ar, int buf_id)
{
- struct sk_buff *msdu = skb;
+ struct sk_buff *msdu;
struct ieee80211_tx_info *info;
- struct ath11k *ar = ctx;
- struct ath11k_base *ab = ar->ab;
spin_lock_bh(&ar->txmgmt_idr_lock);
- idr_remove(&ar->txmgmt_idr, buf_id);
+ msdu = idr_remove(&ar->txmgmt_idr, buf_id);
spin_unlock_bh(&ar->txmgmt_idr_lock);
- dma_unmap_single(ab->dev, ATH11K_SKB_CB(msdu)->paddr, msdu->len,
+
+ if (!msdu)
+ return;
+
+ dma_unmap_single(ar->ab->dev, ATH11K_SKB_CB(msdu)->paddr, msdu->len,
DMA_TO_DEVICE);
info = IEEE80211_SKB_CB(msdu);
memset(&info->status, 0, sizeof(info->status));
ieee80211_free_txskb(ar->hw, msdu);
+}
+
+int ath11k_mac_tx_mgmt_pending_free(int buf_id, void *skb, void *ctx)
+{
+ struct ath11k *ar = ctx;
+
+ ath11k_mac_tx_mgmt_free(ar, buf_id);
return 0;
}
@@ -4156,17 +4166,10 @@ static int ath11k_mac_vif_txmgmt_idr_remove(int buf_id, void *skb, void *ctx)
{
struct ieee80211_vif *vif = ctx;
struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB((struct sk_buff *)skb);
- struct sk_buff *msdu = skb;
struct ath11k *ar = skb_cb->ar;
- struct ath11k_base *ab = ar->ab;
- if (skb_cb->vif == vif) {
- spin_lock_bh(&ar->txmgmt_idr_lock);
- idr_remove(&ar->txmgmt_idr, buf_id);
- spin_unlock_bh(&ar->txmgmt_idr_lock);
- dma_unmap_single(ab->dev, skb_cb->paddr, msdu->len,
- DMA_TO_DEVICE);
- }
+ if (skb_cb->vif == vif)
+ ath11k_mac_tx_mgmt_free(ar, buf_id);
return 0;
}
@@ -4181,6 +4184,8 @@ static int ath11k_mac_mgmt_tx_wmi(struct ath11k *ar, struct ath11k_vif *arvif,
int buf_id;
int ret;
+ ATH11K_SKB_CB(skb)->ar = ar;
+
spin_lock_bh(&ar->txmgmt_idr_lock);
buf_id = idr_alloc(&ar->txmgmt_idr, skb, 0,
ATH11K_TX_MGMT_NUM_PENDING_MAX, GFP_ATOMIC);
--
2.34.1
next prev parent reply other threads:[~2022-01-18 2:37 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220118023152.1948105-1-sashal@kernel.org>
2022-01-18 2:28 ` [PATCH AUTOSEL 5.15 011/188] ar5523: Fix null-ptr-deref with unexpected WDCMSG_TARGET_START reply Sasha Levin
2022-01-18 2:29 ` [PATCH AUTOSEL 5.15 022/188] ath11k: Fix crash caused by uninitialized TX ring Sasha Levin
2022-01-18 2:29 ` [PATCH AUTOSEL 5.15 063/188] rtw88: add quirk to disable pci caps on HP 250 G7 Notebook PC Sasha Levin
2022-01-18 2:29 ` [PATCH AUTOSEL 5.15 064/188] mwifiex: Fix skb_over_panic in mwifiex_usb_recv() Sasha Levin
2022-01-18 2:29 ` [PATCH AUTOSEL 5.15 065/188] rsi: Fix use-after-free in rsi_rx_done_handler() Sasha Levin
2022-01-18 2:29 ` [PATCH AUTOSEL 5.15 066/188] rsi: Fix out-of-bounds read in rsi_read_pkt() Sasha Levin
2022-01-18 2:29 ` Sasha Levin [this message]
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 090/188] iwlwifi: mvm: synchronize with FW after multicast commands Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 091/188] iwlwifi: mvm: avoid clearing a just saved session protection id Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 094/188] ath11k: avoid deadlock by change ieee80211_queue_work for regd_update_work Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 095/188] ath10k: Fix tx hanging Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 102/188] ath11k: Avoid false DEADLOCK warning reported by lockdep Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 130/188] mt76: mt7615: fix possible deadlock while mt7615_register_ext_phy() Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 131/188] mt76: do not pass the received frame with decryption error Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 132/188] mt76: mt7615: improve wmm index allocation Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 133/188] ath9k_htc: fix NULL pointer dereference at ath9k_htc_rxep() Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 134/188] ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet() Sasha Levin
2022-01-18 2:30 ` [PATCH AUTOSEL 5.15 135/188] ath9k: Fix out-of-bound memcpy in ath9k_hif_usb_rx_stream Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 136/188] rtw88: 8822c: update rx settings to prevent potential hw deadlock Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 138/188] iwlwifi: fix leaks/bad data after failed firmware load Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 139/188] iwlwifi: remove module loading failure message Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 140/188] iwlwifi: mvm: Fix calculation of frame length Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 141/188] iwlwifi: mvm: fix AUX ROC removal Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 142/188] iwlwifi: pcie: make sure prph_info is set when treating wakeup IRQ Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 146/188] ath11k: Fix napi related hang Sasha Levin
2022-01-18 2:31 ` [PATCH AUTOSEL 5.15 167/188] mac80211: allow non-standard VHT MCS-10/11 Sasha Levin
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