From c5329b2d5b8b4e41be14d31ee8505b4f5607bf9b Mon Sep 17 00:00:00 2001
From: Miaoqing Pan <miaoqing@codeaurora.org>
Date: Wed, 9 Oct 2019 16:18:08 +0800
Subject: [PATCH] ath10k: fix array out-of-bounds access
Git-commit: c5329b2d5b8b4e41be14d31ee8505b4f5607bf9b
Patch-mainline: v5.5-rc1
References: git-fixes
If firmware reports rate_max > WMI_TPC_RATE_MAX(WMI_TPC_FINAL_RATE_MAX)
or num_tx_chain > WMI_TPC_TX_N_CHAIN, it will cause array out-of-bounds
access, so print a warning and reset to avoid memory corruption.
Tested HW: QCA9984
Tested FW: 10.4-3.9.0.2-00035
Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/ath/ath10k/debug.c | 2 +-
drivers/net/wireless/ath/ath10k/wmi.c | 49 +++++++++++++++++++++------------
2 files changed, 32 insertions(+), 19 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index bd2b5628f850..40baf25ac99f 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -1516,7 +1516,7 @@ static void ath10k_tpc_stats_print(struct ath10k_tpc_stats *tpc_stats,
*len += scnprintf(buf + *len, buf_len - *len,
"No. Preamble Rate_code ");
- for (i = 0; i < WMI_TPC_TX_N_CHAIN; i++)
+ for (i = 0; i < tpc_stats->num_tx_chain; i++)
*len += scnprintf(buf + *len, buf_len - *len,
"tpc_value%d ", i);
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index f0ab11556dc2..4473b13d1d48 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -4681,16 +4681,13 @@ static void ath10k_tpc_config_disp_tables(struct ath10k *ar,
}
pream_idx = 0;
- for (i = 0; i < __le32_to_cpu(ev->rate_max); i++) {
+ for (i = 0; i < tpc_stats->rate_max; i++) {
memset(tpc_value, 0, sizeof(tpc_value));
memset(buff, 0, sizeof(buff));
if (i == pream_table[pream_idx])
pream_idx++;
- for (j = 0; j < WMI_TPC_TX_N_CHAIN; j++) {
- if (j >= __le32_to_cpu(ev->num_tx_chain))
- break;
-
+ for (j = 0; j < tpc_stats->num_tx_chain; j++) {
tpc[j] = ath10k_tpc_config_get_rate(ar, ev, i, j + 1,
rate_code[i],
type);
@@ -4803,7 +4800,7 @@ void ath10k_wmi_tpc_config_get_rate_code(u8 *rate_code, u16 *pream_table,
void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
{
- u32 num_tx_chain;
+ u32 num_tx_chain, rate_max;
u8 rate_code[WMI_TPC_RATE_MAX];
u16 pream_table[WMI_TPC_PREAM_TABLE_MAX];
struct wmi_pdev_tpc_config_event *ev;
@@ -4819,6 +4816,13 @@ void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
return;
}
+ rate_max = __le32_to_cpu(ev->rate_max);
+ if (rate_max > WMI_TPC_RATE_MAX) {
+ ath10k_warn(ar, "number of rate is %d greater than TPC configured rate %d\n",
+ rate_max, WMI_TPC_RATE_MAX);
+ rate_max = WMI_TPC_RATE_MAX;
+ }
+
tpc_stats = kzalloc(sizeof(*tpc_stats), GFP_ATOMIC);
if (!tpc_stats)
return;
@@ -4835,8 +4839,8 @@ void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
__le32_to_cpu(ev->twice_antenna_reduction);
tpc_stats->power_limit = __le32_to_cpu(ev->power_limit);
tpc_stats->twice_max_rd_power = __le32_to_cpu(ev->twice_max_rd_power);
- tpc_stats->num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
- tpc_stats->rate_max = __le32_to_cpu(ev->rate_max);
+ tpc_stats->num_tx_chain = num_tx_chain;
+ tpc_stats->rate_max = rate_max;
ath10k_tpc_config_disp_tables(ar, ev, tpc_stats,
rate_code, pream_table,
@@ -5031,16 +5035,13 @@ ath10k_wmi_tpc_stats_final_disp_tables(struct ath10k *ar,
}
pream_idx = 0;
- for (i = 0; i < __le32_to_cpu(ev->rate_max); i++) {
+ for (i = 0; i < tpc_stats->rate_max; i++) {
memset(tpc_value, 0, sizeof(tpc_value));
memset(buff, 0, sizeof(buff));
if (i == pream_table[pream_idx])
pream_idx++;
- for (j = 0; j < WMI_TPC_TX_N_CHAIN; j++) {
- if (j >= __le32_to_cpu(ev->num_tx_chain))
- break;
-
+ for (j = 0; j < tpc_stats->num_tx_chain; j++) {
tpc[j] = ath10k_wmi_tpc_final_get_rate(ar, ev, i, j + 1,
rate_code[i],
type, pream_idx);
@@ -5056,7 +5057,7 @@ ath10k_wmi_tpc_stats_final_disp_tables(struct ath10k *ar,
void ath10k_wmi_event_tpc_final_table(struct ath10k *ar, struct sk_buff *skb)
{
- u32 num_tx_chain;
+ u32 num_tx_chain, rate_max;
u8 rate_code[WMI_TPC_FINAL_RATE_MAX];
u16 pream_table[WMI_TPC_PREAM_TABLE_MAX];
struct wmi_pdev_tpc_final_table_event *ev;
@@ -5064,12 +5065,24 @@ void ath10k_wmi_event_tpc_final_table(struct ath10k *ar, struct sk_buff *skb)
ev = (struct wmi_pdev_tpc_final_table_event *)skb->data;
+ num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
+ if (num_tx_chain > WMI_TPC_TX_N_CHAIN) {
+ ath10k_warn(ar, "number of tx chain is %d greater than TPC final configured tx chain %d\n",
+ num_tx_chain, WMI_TPC_TX_N_CHAIN);
+ return;
+ }
+
+ rate_max = __le32_to_cpu(ev->rate_max);
+ if (rate_max > WMI_TPC_FINAL_RATE_MAX) {
+ ath10k_warn(ar, "number of rate is %d greater than TPC final configured rate %d\n",
+ rate_max, WMI_TPC_FINAL_RATE_MAX);
+ rate_max = WMI_TPC_FINAL_RATE_MAX;
+ }
+
tpc_stats = kzalloc(sizeof(*tpc_stats), GFP_ATOMIC);
if (!tpc_stats)
return;
- num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
-
ath10k_wmi_tpc_config_get_rate_code(rate_code, pream_table,
num_tx_chain);
@@ -5082,8 +5095,8 @@ void ath10k_wmi_event_tpc_final_table(struct ath10k *ar, struct sk_buff *skb)
__le32_to_cpu(ev->twice_antenna_reduction);
tpc_stats->power_limit = __le32_to_cpu(ev->power_limit);
tpc_stats->twice_max_rd_power = __le32_to_cpu(ev->twice_max_rd_power);
- tpc_stats->num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
- tpc_stats->rate_max = __le32_to_cpu(ev->rate_max);
+ tpc_stats->num_tx_chain = num_tx_chain;
+ tpc_stats->rate_max = rate_max;
ath10k_wmi_tpc_stats_final_disp_tables(ar, ev, tpc_stats,
rate_code, pream_table,
--
2.16.4