Increase akm_suites array size in struct cfg80211_crypto_settings to 10
and advertise the capability to userspace. This allows userspace to send
more than two AKMs to driver in netlink commands such as
NL80211_CMD_CONNECT.
This capability needed for implementing WPA3-Personal transition mode
correctly with any driver that handles roaming internally. Currently,
the possible AKMs for multi-AKM connect can include PSK, PSK-SHA-256,
SAE, FT-PSK and FT-SAE since the count is already 5, Increasing
the akm_suites array size to 10 should be reasonable for future
usecases.
Contains a fix for the issue:
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@xxxxxxxxxxx>
---
v3:
- Increase akm_suites array size in cfg80211_crypto_settings instead
of allocating the array dynamically.
v2:
- Fixed issue reported by kernel test robot.
---
drivers/net/wireless/quantenna/qtnfmac/commands.c | 12 ++++++++----
include/net/cfg80211.h | 11 ++++++++++-
include/uapi/linux/nl80211.h | 14 ++++++++++++++
net/wireless/core.c | 6 ++++++
net/wireless/nl80211.c | 10 +++++++++-
5 files changed, 47 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/quantenna/qtnfmac/commands.c b/drivers/net/wireless/quantenna/qtnfmac/commands.c
index c68563c..2c84736 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/commands.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/commands.c
@@ -241,6 +241,7 @@ int qtnf_cmd_send_start_ap(struct qtnf_vif *vif,
struct qlink_auth_encr *aen;
int ret;
int i;
+ int n;
if (!qtnf_cmd_start_ap_can_fit(vif, s))
return -E2BIG;
@@ -280,8 +281,9 @@ int qtnf_cmd_send_start_ap(struct qtnf_vif *vif,
for (i = 0; i < QLINK_MAX_NR_CIPHER_SUITES; i++)
aen->ciphers_pairwise[i] =
cpu_to_le32(s->crypto.ciphers_pairwise[i]);
- aen->n_akm_suites = cpu_to_le32(s->crypto.n_akm_suites);
- for (i = 0; i < QLINK_MAX_NR_AKM_SUITES; i++)
+ n = min(QLINK_MAX_NR_AKM_SUITES, s->crypto.n_akm_suites);
+ aen->n_akm_suites = cpu_to_le32(n);
+ for (i = 0; i < n; i++)
aen->akm_suites[i] = cpu_to_le32(s->crypto.akm_suites[i]);
aen->control_port = s->crypto.control_port;
aen->control_port_no_encrypt = s->crypto.control_port_no_encrypt;
@@ -2076,6 +2078,7 @@ int qtnf_cmd_send_connect(struct qtnf_vif *vif,
struct qlink_auth_encr *aen;
int ret;
int i;
+ int n;
u32 connect_flags = 0;
cmd_skb = qtnf_cmd_alloc_new_cmdskb(vif->mac->macid, vif->vifid,
@@ -2132,9 +2135,10 @@ int qtnf_cmd_send_connect(struct qtnf_vif *vif,
aen->ciphers_pairwise[i] =
cpu_to_le32(sme->crypto.ciphers_pairwise[i]);
- aen->n_akm_suites = cpu_to_le32(sme->crypto.n_akm_suites);
+ n = min(QLINK_MAX_NR_AKM_SUITES, sme->crypto.n_akm_suites);
+ aen->n_akm_suites = cpu_to_le32(n);
- for (i = 0; i < QLINK_MAX_NR_AKM_SUITES; i++)
+ for (i = 0; i < n; i++)
aen->akm_suites[i] = cpu_to_le32(sme->crypto.akm_suites[i]);
aen->control_port = sme->crypto.control_port;
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index cc8a988..33919256 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1061,6 +1061,7 @@ struct survey_info {
};
#define CFG80211_MAX_WEP_KEYS 4
+#define CFG80211_MAX_NUM_AKM_SUITES 10
/**
* struct cfg80211_crypto_settings - Crypto settings
@@ -1112,7 +1113,7 @@ struct cfg80211_crypto_settings {
int n_ciphers_pairwise;
u32 ciphers_pairwise[NL80211_MAX_NR_CIPHER_SUITES];
int n_akm_suites;
- u32 akm_suites[NL80211_MAX_NR_AKM_SUITES];
+ u32 akm_suites[CFG80211_MAX_NUM_AKM_SUITES];
bool control_port;
__be16 control_port_ethertype;
bool control_port_no_encrypt;
@@ -5134,6 +5135,13 @@ struct wiphy_iftype_akm_suites {
* @ema_max_profile_periodicity: maximum profile periodicity supported by
* the driver. Setting this field to a non-zero value indicates that the
* driver supports enhanced multi-BSSID advertisements (EMA AP).
+ * @max_num_akm_suites: maximum number of AKM suites allowed for
+ * configuration through %NL80211_CMD_CONNECT, %NL80211_CMD_ASSOCIATE and
+ * %NL80211_CMD_START_AP. Set to NL80211_MAX_NR_AKM_SUITES if not set by
+ * driver. If set by driver minimum allowed value is
+ * NL80211_MAX_NR_AKM_SUITES in order to avoid compatibility issues with
+ * legacy userspace and maximum allowed value is
+ * CFG80211_MAX_NUM_AKM_SUITES.
*/
struct wiphy {
struct mutex mtx;
@@ -5280,6 +5288,7 @@ struct wiphy {
u8 mbssid_max_interfaces;
u8 ema_max_profile_periodicity;
+ u16 max_num_akm_suites;
char priv[] __aligned(NETDEV_ALIGN);
};
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index d9490e3..246bd00 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2663,6 +2663,13 @@ enum nl80211_commands {
* association request when used with NL80211_CMD_NEW_STATION). Can be set
* only if %NL80211_STA_FLAG_WME is set.
*
+ * @NL80211_ATTR_MAX_NUM_AKM_SUITES: U16 attribute. Indicates maximum number of
+ * AKM suites allowed for %NL80211_CMD_CONNECT, %NL80211_CMD_ASSOCIATE and
+ * %NL80211_CMD_START_AP in %NL80211_CMD_GET_WIPHY response. If this
+ * attribute is not present userspace shall consider maximum number of AKM
+ * suites allowed as %NL80211_MAX_NR_AKM_SUITES which is the legacy maximum
+ * number prior to the introduction of this attribute.
+ *
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@@ -3177,6 +3184,8 @@ enum nl80211_attrs {
NL80211_ATTR_DISABLE_EHT,
+ NL80211_ATTR_MAX_NUM_AKM_SUITES,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -3231,6 +3240,11 @@ enum nl80211_attrs {
#define NL80211_HE_MIN_CAPABILITY_LEN 16
#define NL80211_HE_MAX_CAPABILITY_LEN 54
#define NL80211_MAX_NR_CIPHER_SUITES 5
+
+/*
+ * NL80211_MAX_NR_AKM_SUITES is obsolete when %NL80211_ATTR_MAX_NUM_AKM_SUITES
+ * present in %NL80211_CMD_GET_WIPHY response.
+ */
#define NL80211_MAX_NR_AKM_SUITES 2
#define NL80211_EHT_MIN_CAPABILITY_LEN 13
#define NL80211_EHT_MAX_CAPABILITY_LEN 51
diff --git a/net/wireless/core.c b/net/wireless/core.c
index f08d4b3..8d42fc4 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -913,6 +913,12 @@ int wiphy_register(struct wiphy *wiphy)
return -EINVAL;
#endif
+ if (!wiphy->max_num_akm_suites)
+ wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES;
+ else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES ||
+ wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES)
+ return -EINVAL;
+
/* check and set up bitrates */
ieee80211_set_bitrate_flags(wiphy);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 842f82f..2134430 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -792,6 +792,10 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
NL80211_EHT_MIN_CAPABILITY_LEN,
NL80211_EHT_MAX_CAPABILITY_LEN),
[NL80211_ATTR_DISABLE_EHT] = { .type = NLA_FLAG },
+ [NL80211_ATTR_MAX_NUM_AKM_SUITES] =
+ NLA_POLICY_RANGE(NLA_U16,
+ NL80211_MAX_NR_AKM_SUITES,
+ CFG80211_MAX_NUM_AKM_SUITES),
};
/* policy for the key attributes */
@@ -2891,6 +2895,10 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
if (nl80211_put_mbssid_support(&rdev->wiphy, msg))
goto nla_put_failure;
+ if (nla_put_u16(msg, NL80211_ATTR_MAX_NUM_AKM_SUITES,
+ rdev->wiphy.max_num_akm_suites))
+ goto nla_put_failure;
+
/* done */
state->split_start = 0;
break;
@@ -10263,7 +10271,7 @@ static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
if (len % sizeof(u32))
return -EINVAL;
- if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
+ if (settings->n_akm_suites > rdev->wiphy.max_num_akm_suites)
return -EINVAL;
memcpy(settings->akm_suites, data, len);
--
2.7.4
