![John Crispin](/assets/img/avatar_default.png)
he_spr_ie_elem is dereferenced before the NULL check. fix this by moving
the assignment after the check.
fixes commit 697f6c507c
("mac80211: propagate HE operation info into
bss_conf")
This was reported by the static code checker.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/20190813070712.25509-1-john@phrozen.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* HE handling
|
|
*
|
|
* Copyright(c) 2017 Intel Deutschland GmbH
|
|
*/
|
|
|
|
#include "ieee80211_i.h"
|
|
|
|
void
|
|
ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_supported_band *sband,
|
|
const u8 *he_cap_ie, u8 he_cap_len,
|
|
struct sta_info *sta)
|
|
{
|
|
struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
|
|
struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
|
|
u8 he_ppe_size;
|
|
u8 mcs_nss_size;
|
|
u8 he_total_size;
|
|
|
|
memset(he_cap, 0, sizeof(*he_cap));
|
|
|
|
if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
|
|
return;
|
|
|
|
/* Make sure size is OK */
|
|
mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
|
|
he_ppe_size =
|
|
ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
|
|
mcs_nss_size],
|
|
he_cap_ie_elem->phy_cap_info);
|
|
he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
|
|
he_ppe_size;
|
|
if (he_cap_len < he_total_size)
|
|
return;
|
|
|
|
memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
|
|
|
|
/* HE Tx/Rx HE MCS NSS Support Field */
|
|
memcpy(&he_cap->he_mcs_nss_supp,
|
|
&he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
|
|
|
|
/* Check if there are (optional) PPE Thresholds */
|
|
if (he_cap->he_cap_elem.phy_cap_info[6] &
|
|
IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
|
|
memcpy(he_cap->ppe_thres,
|
|
&he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
|
|
he_ppe_size);
|
|
|
|
he_cap->has_he = true;
|
|
}
|
|
|
|
void
|
|
ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
|
|
const struct ieee80211_he_operation *he_op_ie_elem)
|
|
{
|
|
struct ieee80211_he_operation *he_operation =
|
|
&vif->bss_conf.he_operation;
|
|
|
|
if (!he_op_ie_elem) {
|
|
memset(he_operation, 0, sizeof(*he_operation));
|
|
return;
|
|
}
|
|
|
|
vif->bss_conf.he_operation = *he_op_ie_elem;
|
|
}
|
|
|
|
void
|
|
ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
|
|
const struct ieee80211_he_spr *he_spr_ie_elem)
|
|
{
|
|
struct ieee80211_he_obss_pd *he_obss_pd =
|
|
&vif->bss_conf.he_obss_pd;
|
|
const u8 *data;
|
|
|
|
memset(he_obss_pd, 0, sizeof(*he_obss_pd));
|
|
|
|
if (!he_spr_ie_elem)
|
|
return;
|
|
data = he_spr_ie_elem->optional;
|
|
|
|
if (he_spr_ie_elem->he_sr_control &
|
|
IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
|
|
data++;
|
|
if (he_spr_ie_elem->he_sr_control &
|
|
IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
|
|
he_obss_pd->max_offset = *data++;
|
|
he_obss_pd->min_offset = *data++;
|
|
he_obss_pd->enable = true;
|
|
}
|
|
}
|