wifi: cfg80211: Fix extended KCK key length check in nl80211_set_rekey_data()

The extended KCK key length check wrongly using the KEK key attribute
for validation. Due to this GTK rekey offload is failing when the KCK
key length is 24 bytes even though the driver advertising
WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK flag. Use correct attribute to fix the
same.

Fixes: 093a48d2aa4b ("cfg80211: support bigger kek/kck key length")
Signed-off-by: Shivani Baranwal <quic_shivbara@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20221206143715.1802987-2-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 33a82ecab9d565ac186b93308a3c3f5d41c41f5f..02b9a0280896cb702f9fc66347a8f643f6e752a0 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -13809,7 +13809,7 @@ static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
                return -ERANGE;
        if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN &&
            !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK &&
-             nla_len(tb[NL80211_REKEY_DATA_KEK]) == NL80211_KCK_EXT_LEN))
+             nla_len(tb[NL80211_REKEY_DATA_KCK]) == NL80211_KCK_EXT_LEN))
                return -ERANGE;
 
        rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);