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From: Sriram R <srirrama@codeaurora.org>
Date: Wed, 3 Oct 2018 08:43:50 +0530
Subject: [PATCH] ath10k: fix possible out of bound access of ath10k_rates array
While using 'ath10k_mac_get_rate_hw_value()' to obtain the hw value
from the passed bitrate, there is a chance of out of bound array access
when wrong bitrate is passed. This is fixed by comparing the bitrates
within the correct size of the ath10k_rates array.
Fixes commit f279294e9ee2 ("ath10k: add support for configuring management
packet rate"). Also correction made to some indents used in the above commit.
Signed-off-by: Sriram R <srirrama@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Origin: backport, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34e141eea7dd8525dd1ef7a925459e455b4d307f
---
--- a/ath10k-4.19/mac.c
+++ b/ath10k-4.19/mac.c
@@ -165,7 +165,7 @@ static int ath10k_mac_get_rate_hw_value(
if (ath10k_mac_bitrate_is_cck(bitrate))
hw_value_prefix = WMI_RATE_PREAMBLE_CCK << 6;
- for (i = 0; i < sizeof(ath10k_rates); i++) {
+ for (i = 0; i < ARRAY_SIZE(ath10k_rates); i++) {
if (ath10k_rates[i].bitrate == bitrate)
return hw_value_prefix | ath10k_rates[i].hw_value;
}
@@ -6564,22 +6564,22 @@ static void ath10k_bss_info_changed(stru
return;
}
- sband = ar->hw->wiphy->bands[def.chan->band];
- basic_rate_idx = ffs(vif->bss_conf.basic_rates) - 1;
- bitrate = sband->bitrates[basic_rate_idx].bitrate;
-
- hw_rate_code = ath10k_mac_get_rate_hw_value(bitrate);
- if (hw_rate_code < 0) {
- ath10k_warn(ar, "bitrate not supported %d\n", bitrate);
- mutex_unlock(&ar->conf_mutex);
- return;
- }
+ sband = ar->hw->wiphy->bands[def.chan->band];
+ basic_rate_idx = ffs(vif->bss_conf.basic_rates) - 1;
+ bitrate = sband->bitrates[basic_rate_idx].bitrate;
+
+ hw_rate_code = ath10k_mac_get_rate_hw_value(bitrate);
+ if (hw_rate_code < 0) {
+ ath10k_warn(ar, "bitrate not supported %d\n", bitrate);
+ mutex_unlock(&ar->conf_mutex);
+ return;
+ }
- vdev_param = ar->wmi.vdev_param->mgmt_rate;
- ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
- hw_rate_code);
- if (ret)
- ath10k_warn(ar, "failed to set mgmt tx rate %d\n", ret);
+ vdev_param = ar->wmi.vdev_param->mgmt_rate;
+ ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
+ hw_rate_code);
+ if (ret)
+ ath10k_warn(ar, "failed to set mgmt tx rate %d\n", ret);
}
mutex_unlock(&ar->conf_mutex);
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