[PATCH v4] Set ssid when authenticating

Marc Bornand
2023-02-14T13:21:08Z

changes since v3:
- add missing NULL check
- add missing break

changes since v2:
- The code was tottaly rewritten based on the disscution of the
v2 patch.
- the ssid is set in __cfg80211_connect_result() and only if the ssid is
not already set.
- Do not add an other ssid reset path since it is already done in
__cfg80211_disconnected()

When a connexion was established without going through
NL80211_CMD_CONNECT, the ssid was never set in the wireless_dev struct.
Now we set it in __cfg80211_connect_result() when it is not already set.

Reported-by: Yohan Prod'homme <kernel@zoddo.fr>
Fixes: 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1
Cc: linux-wireless@vger.kernel.org
Cc: stable@vger.kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216711
Signed-off-by: Marc Bornand <dev.mbornand@systemb.ch>
---
net/wireless/sme.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 4b5b6ee0fe01..b552d6c20a26 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -723,6 +723,7 @@ void __cfg80211_connect_result(struct net_device *dev,
bool wextev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
+ const struct element *ssid;
const struct element *country_elem = NULL;
const u8 *country_data;
u8 country_datalen;
@@ -883,6 +884,22 @@ void __cfg80211_connect_result(struct net_device *dev,
country_data, country_datalen);
kfree(country_data);

+ if (wdev->u.client.ssid_len == 0) {
+ rcu_read_lock();
+ for_each_valid_link(cr, link) {
+ ssid = ieee80211_bss_get_elem(cr->links[link].bss,
+ WLAN_EID_SSID);
+
+ if (!ssid || ssid->datalen == 0)
+ continue;
+
+ memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
+ wdev->u.client.ssid_len = ssid->datalen;
+ break;
+ }
+ rcu_read_unlock();
+ }
+
return;
out:
for_each_valid_link(cr, link)
--
2.39.1