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[08/31] mac80211: free skb in WEP error case

Message ID iwlwifi.20210618133832.98f058d7a8b2.Ie605e6a10e72eae02f5734032826af48b85b6d11@changeid (mailing list archive)
State Accepted
Delegated to: Johannes Berg
Headers show
Series cfg80211/mac80211 patches from our internal tree 2021-06-18 | expand

Commit Message

Luca Coelho June 18, 2021, 10:41 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

If, for some strange reason, ieee80211_wep_encrypt() fails in
ieee80211_send_auth() free the SKB instead of sending out the
useless frame, in addition to the warning. This can't really
happen since the SKB was freshly allocated.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 net/mac80211/util.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index a0ff27487686..0f6fd90f6696 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1693,7 +1693,10 @@  void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
 	if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
 		mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 		err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
-		WARN_ON(err);
+		if (WARN_ON(err)) {
+			kfree_skb(skb);
+			return;
+		}
 	}
 
 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |