* [PATCH AUTOSEL 4.19 004/206] ath10k: fix array out-of-bounds access
[not found] <20200918020802.2065198-1-sashal@kernel.org>
@ 2020-09-18 2:04 ` Sasha Levin
2020-09-18 2:04 ` [PATCH AUTOSEL 4.19 005/206] ath10k: fix memory leak for tpc_stats_final Sasha Levin
2020-09-18 2:06 ` [PATCH AUTOSEL 4.19 102/206] ath10k: use kzalloc to read for ath10k_sdio_hif_diag_read Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2020-09-18 2:04 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, Miaoqing Pan, netdev, linux-wireless, ath10k,
Kalle Valo
From: Miaoqing Pan <miaoqing@codeaurora.org>
[ Upstream commit c5329b2d5b8b4e41be14d31ee8505b4f5607bf9b ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 0baaad90b8d18..aa333110eaba6 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -1521,7 +1521,7 @@ 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 3372dfa0deccf..3f3fbee631c34 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -4550,16 +4550,13 @@ 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);
@@ -4672,7 +4669,7 @@ 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;
@@ -4688,6 +4685,13 @@ 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;
@@ -4704,8 +4708,8 @@ 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,
@@ -4900,16 +4904,13 @@ 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);
@@ -4925,7 +4926,7 @@ 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;
@@ -4933,12 +4934,24 @@ 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);
@@ -4951,8 +4964,8 @@ 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,
--
2.25.1
_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH AUTOSEL 4.19 102/206] ath10k: use kzalloc to read for ath10k_sdio_hif_diag_read
[not found] <20200918020802.2065198-1-sashal@kernel.org>
2020-09-18 2:04 ` [PATCH AUTOSEL 4.19 004/206] ath10k: fix array out-of-bounds access Sasha Levin
2020-09-18 2:04 ` [PATCH AUTOSEL 4.19 005/206] ath10k: fix memory leak for tpc_stats_final Sasha Levin
@ 2020-09-18 2:06 ` Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2020-09-18 2:06 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, netdev, linux-wireless, ath10k, Wen Gong, Kalle Valo
From: Wen Gong <wgong@codeaurora.org>
[ Upstream commit 402f2992b4d62760cce7c689ff216ea3bf4d6e8a ]
When use command to read values, it crashed.
command:
dd if=/sys/kernel/debug/ieee80211/phy0/ath10k/mem_value count=1 bs=4 skip=$((0x100233))
It will call to ath10k_sdio_hif_diag_read with address = 0x4008cc and buf_len = 4.
Then system crash:
[ 1786.013258] Unable to handle kernel paging request at virtual address ffffffc00bd45000
[ 1786.013273] Mem abort info:
[ 1786.013281] ESR = 0x96000045
[ 1786.013291] Exception class = DABT (current EL), IL = 32 bits
[ 1786.013299] SET = 0, FnV = 0
[ 1786.013307] EA = 0, S1PTW = 0
[ 1786.013314] Data abort info:
[ 1786.013322] ISV = 0, ISS = 0x00000045
[ 1786.013330] CM = 0, WnR = 1
[ 1786.013342] swapper pgtable: 4k pages, 39-bit VAs, pgdp = 000000008542a60e
[ 1786.013350] [ffffffc00bd45000] pgd=0000000000000000, pud=0000000000000000
[ 1786.013368] Internal error: Oops: 96000045 [#1] PREEMPT SMP
[ 1786.013609] Process swapper/0 (pid: 0, stack limit = 0x0000000084b153c6)
[ 1786.013623] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.86 #137
[ 1786.013631] Hardware name: MediaTek krane sku176 board (DT)
[ 1786.013643] pstate: 80000085 (Nzcv daIf -PAN -UAO)
[ 1786.013662] pc : __memcpy+0x94/0x180
[ 1786.013678] lr : swiotlb_tbl_unmap_single+0x84/0x150
[ 1786.013686] sp : ffffff8008003c60
[ 1786.013694] x29: ffffff8008003c90 x28: ffffffae96411f80
[ 1786.013708] x27: ffffffae960d2018 x26: ffffff8019a4b9a8
[ 1786.013721] x25: 0000000000000000 x24: 0000000000000001
[ 1786.013734] x23: ffffffae96567000 x22: 00000000000051d4
[ 1786.013747] x21: 0000000000000000 x20: 00000000fe6e9000
[ 1786.013760] x19: 0000000000000004 x18: 0000000000000020
[ 1786.013773] x17: 0000000000000001 x16: 0000000000000000
[ 1786.013787] x15: 00000000ffffffff x14: 00000000000044c0
[ 1786.013800] x13: 0000000000365ba4 x12: 0000000000000000
[ 1786.013813] x11: 0000000000000001 x10: 00000037be6e9000
[ 1786.013826] x9 : ffffffc940000000 x8 : 000000000bd45000
[ 1786.013839] x7 : 0000000000000000 x6 : ffffffc00bd45000
[ 1786.013852] x5 : 0000000000000000 x4 : 0000000000000000
[ 1786.013865] x3 : 0000000000000c00 x2 : 0000000000000004
[ 1786.013878] x1 : fffffff7be6e9004 x0 : ffffffc00bd45000
[ 1786.013891] Call trace:
[ 1786.013903] __memcpy+0x94/0x180
[ 1786.013914] unmap_single+0x6c/0x84
[ 1786.013925] swiotlb_unmap_sg_attrs+0x54/0x80
[ 1786.013938] __swiotlb_unmap_sg_attrs+0x8c/0xa4
[ 1786.013952] msdc_unprepare_data+0x6c/0x84
[ 1786.013963] msdc_request_done+0x58/0x84
[ 1786.013974] msdc_data_xfer_done+0x1a0/0x1c8
[ 1786.013985] msdc_irq+0x12c/0x17c
[ 1786.013996] __handle_irq_event_percpu+0xe4/0x250
[ 1786.014006] handle_irq_event_percpu+0x28/0x68
[ 1786.014015] handle_irq_event+0x48/0x78
[ 1786.014026] handle_fasteoi_irq+0xd0/0x1a0
[ 1786.014039] __handle_domain_irq+0x84/0xc4
[ 1786.014050] gic_handle_irq+0x124/0x1a4
[ 1786.014059] el1_irq+0xb0/0x128
[ 1786.014072] cpuidle_enter_state+0x298/0x328
[ 1786.014082] cpuidle_enter+0x30/0x40
[ 1786.014094] do_idle+0x190/0x268
[ 1786.014104] cpu_startup_entry+0x24/0x28
[ 1786.014116] rest_init+0xd4/0xe0
[ 1786.014126] start_kernel+0x30c/0x38c
[ 1786.014139] Code: f8408423 f80084c3 36100062 b8404423 (b80044c3)
[ 1786.014150] ---[ end trace 3b02ddb698ea69ee ]---
[ 1786.015415] Kernel panic - not syncing: Fatal exception in interrupt
[ 1786.015433] SMP: stopping secondary CPUs
[ 1786.015447] Kernel Offset: 0x2e8d200000 from 0xffffff8008000000
[ 1786.015458] CPU features: 0x0,2188200c
[ 1786.015466] Memory Limit: none
For sdio chip, it need the memory which is kmalloc, if it is
vmalloc from ath10k_mem_value_read, then it have a memory error.
kzalloc of ath10k_sdio_hif_diag_read32 is the correct type, so
add kzalloc in ath10k_sdio_hif_diag_read to replace the buffer
which is vmalloc from ath10k_mem_value_read.
This patch only effect sdio chip.
Tested with QCA6174 SDIO with firmware WLAN.RMH.4.4.1-00029.
Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath10k/sdio.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c
index 0ecaba824fb28..0cdaecb0e28a9 100644
--- a/drivers/net/wireless/ath/ath10k/sdio.c
+++ b/drivers/net/wireless/ath/ath10k/sdio.c
@@ -1567,23 +1567,33 @@ static int ath10k_sdio_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
size_t buf_len)
{
int ret;
+ void *mem;
+
+ mem = kzalloc(buf_len, GFP_KERNEL);
+ if (!mem)
+ return -ENOMEM;
/* set window register to start read cycle */
ret = ath10k_sdio_write32(ar, MBOX_WINDOW_READ_ADDR_ADDRESS, address);
if (ret) {
ath10k_warn(ar, "failed to set mbox window read address: %d", ret);
- return ret;
+ goto out;
}
/* read the data */
- ret = ath10k_sdio_read(ar, MBOX_WINDOW_DATA_ADDRESS, buf, buf_len);
+ ret = ath10k_sdio_read(ar, MBOX_WINDOW_DATA_ADDRESS, mem, buf_len);
if (ret) {
ath10k_warn(ar, "failed to read from mbox window data address: %d\n",
ret);
- return ret;
+ goto out;
}
- return 0;
+ memcpy(buf, mem, buf_len);
+
+out:
+ kfree(mem);
+
+ return ret;
}
static int ath10k_sdio_hif_diag_read32(struct ath10k *ar, u32 address,
--
2.25.1
_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k
^ permalink raw reply related [flat|nested] 3+ messages in thread