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A couple of straggler fixes:

Browse Source 
* a minstrel HT sample check fix
  * peer measurement could double-free on races
  * certificate file generation at build time could
    sometimes hang
  * some parameters weren't reset between connections
    in mac80211
  * some extensible elements were treated as non-
    extensible, possibly causuing bad connections
    (or failures) if the AP adds data
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Merge tag 'mac80211-for-net-2021-06-18' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
A couple of straggler fixes:
 * a minstrel HT sample check fix
 * peer measurement could double-free on races
 * certificate file generation at build time could
   sometimes hang
 * some parameters weren't reset between connections
   in mac80211
 * some extensible elements were treated as non-
   extensible, possibly causuing bad connections
   (or failures) if the AP adds data
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2021-06-18 12:22:55 -07:00
commit 0d1dc9e1f4
5 changed files with 35 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/mac80211/mlme.c
View File

@ -4062,10 +4062,14 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
if (elems.mbssid_config_ie)
bss_conf->profile_periodicity =
elems.mbssid_config_ie->profile_periodicity;
else
bss_conf->profile_periodicity = 0;
if (elems.ext_capab_len >= 11 &&
(elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
bss_conf->ema_ap = true;
else
bss_conf->ema_ap = false;
/* continue assoc process */
ifmgd->assoc_data->timeout = jiffies;
@ -5802,12 +5806,16 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
beacon_ies->data, beacon_ies->len);
if (elem && elem->datalen >= 3)
sdata->vif.bss_conf.profile_periodicity = elem->data[2];
else
sdata->vif.bss_conf.profile_periodicity = 0;
elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
beacon_ies->data, beacon_ies->len);
if (elem && elem->datalen >= 11 &&
(elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
sdata->vif.bss_conf.ema_ap = true;
else
sdata->vif.bss_conf.ema_ap = false;
} else {
assoc_data->timeout = jiffies;
assoc_data->timeout_started = true;

2
net/mac80211/rc80211_minstrel_ht.c
View File

@ -1514,7 +1514,7 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
(info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
return;
if (time_is_before_jiffies(mi->sample_time))
if (time_is_after_jiffies(mi->sample_time))
return;
mi->sample_time = jiffies + MINSTREL_SAMPLE_INTERVAL;

22
net/mac80211/util.c
View File

@ -947,7 +947,7 @@ static void ieee80211_parse_extension_element(u32 *crc,
switch (elem->data[0]) {
case WLAN_EID_EXT_HE_MU_EDCA:
if (len == sizeof(*elems->mu_edca_param_set)) {
if (len >= sizeof(*elems->mu_edca_param_set)) {
elems->mu_edca_param_set = data;
if (crc)
*crc = crc32_be(*crc, (void *)elem,
@ -968,7 +968,7 @@ static void ieee80211_parse_extension_element(u32 *crc,
}
break;
case WLAN_EID_EXT_UORA:
if (len == 1)
if (len >= 1)
elems->uora_element = data;
break;
case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
@ -976,7 +976,7 @@ static void ieee80211_parse_extension_element(u32 *crc,
elems->max_channel_switch_time = data;
break;
case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
if (len == sizeof(*elems->mbssid_config_ie))
if (len >= sizeof(*elems->mbssid_config_ie))
elems->mbssid_config_ie = data;
break;
case WLAN_EID_EXT_HE_SPR:
@ -985,7 +985,7 @@ static void ieee80211_parse_extension_element(u32 *crc,
elems->he_spr = data;
break;
case WLAN_EID_EXT_HE_6GHZ_CAPA:
if (len == sizeof(*elems->he_6ghz_capa))
if (len >= sizeof(*elems->he_6ghz_capa))
elems->he_6ghz_capa = data;
break;
}
@ -1074,14 +1074,14 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
switch (id) {
case WLAN_EID_LINK_ID:
if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
elem_parse_failed = true;
break;
}
elems->lnk_id = (void *)(pos - 2);
break;
case WLAN_EID_CHAN_SWITCH_TIMING:
if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
elem_parse_failed = true;
break;
}
@ -1244,7 +1244,7 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
elems->sec_chan_offs = (void *)pos;
break;
case WLAN_EID_CHAN_SWITCH_PARAM:
if (elen !=
if (elen <
sizeof(*elems->mesh_chansw_params_ie)) {
elem_parse_failed = true;
break;
@ -1253,7 +1253,7 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
break;
case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
if (!action ||
elen != sizeof(*elems->wide_bw_chansw_ie)) {
elen < sizeof(*elems->wide_bw_chansw_ie)) {
elem_parse_failed = true;
break;
}
@ -1272,7 +1272,7 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
pos, elen);
if (ie) {
if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
elems->wide_bw_chansw_ie =
(void *)(ie + 2);
else
@ -1316,7 +1316,7 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
elems->cisco_dtpc_elem = pos;
break;
case WLAN_EID_ADDBA_EXT:
if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
elem_parse_failed = true;
break;
}
@ -1342,7 +1342,7 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
elem, elems);
break;
case WLAN_EID_S1G_CAPABILITIES:
if (elen == sizeof(*elems->s1g_capab))
if (elen >= sizeof(*elems->s1g_capab))
elems->s1g_capab = (void *)pos;
else
elem_parse_failed = true;

2
net/wireless/Makefile
View File

@ -28,7 +28,7 @@ $(obj)/shipped-certs.c: $(wildcard $(srctree)/$(src)/certs/*.hex)
@$(kecho) " GEN $@"
@(echo '#include "reg.h"'; \
echo 'const u8 shipped_regdb_certs[] = {'; \
cat $^ ; \
echo | cat - $^ ; \
echo '};'; \
echo 'unsigned int shipped_regdb_certs_len = sizeof(shipped_regdb_certs);'; \
) > $@

16
net/wireless/pmsr.c
View File

@ -334,6 +334,7 @@ void cfg80211_pmsr_complete(struct wireless_dev *wdev,
gfp_t gfp)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_pmsr_request *tmp, *prev, *to_free = NULL;
struct sk_buff *msg;
void *hdr;
@ -364,9 +365,20 @@ free_msg:
nlmsg_free(msg);
free_request:
spin_lock_bh(&wdev->pmsr_lock);
list_del(&req->list);
/*
* cfg80211_pmsr_process_abort() may have already moved this request
* to the free list, and will free it later. In this case, don't free
* it here.
*/
list_for_each_entry_safe(tmp, prev, &wdev->pmsr_list, list) {
if (tmp == req) {
list_del(&req->list);
to_free = req;
break;
}
}
spin_unlock_bh(&wdev->pmsr_lock);
kfree(req);
kfree(to_free);
}
EXPORT_SYMBOL_GPL(cfg80211_pmsr_complete);