If the ssid_eid[1] length is more that 32 it leads to memory corruption.
Fixes: a910e4a94f69 ("cw1200: add driver for the ST-E CW1100 & CW1200 WLAN chipsets")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
drivers/net/wireless/marvell/libertas/cfg.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/marvell/libertas/cfg.c b/drivers/net/wireless/marvell/libertas/cfg.c
index 94dd488becaf..caba7491cd5a 100644
--- a/drivers/net/wireless/marvell/libertas/cfg.c
+++ b/drivers/net/wireless/marvell/libertas/cfg.c
@@ -1151,10 +1151,13 @@ static int lbs_associate(struct lbs_private *priv,
/* add SSID TLV */
rcu_read_lock();
ssid_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
- if (ssid_eid)
- pos += lbs_add_ssid_tlv(pos, ssid_eid + 2, ssid_eid[1]);
- else
+ if (ssid_eid) {
+ u32 ssid_len = min(ssid_eid[1], IEEE80211_MAX_SSID_LEN);
+
+ pos += lbs_add_ssid_tlv(pos, ssid_eid + 2, ssid_len);
+ } else {
lbs_deb_assoc("no SSID\n");
+ }
rcu_read_unlock();
/* add DS param TLV */
--
2.47.2
