Johannes and John,
A regression in recent versions of mac80211 are generating the WARNING at
net/mac80211/wep.c:101, because the skb headroom is less than WEP_IV_LEN or the
tailroom is less than WEP_ICV_LEN. My testing indicates that it is a headroom
problem as the following hack "fixes" it:
Index: wireless-testing-new/net/mac80211/tx.c
===================================================================
--- wireless-testing-new.orig/net/mac80211/tx.c
+++ wireless-testing-new/net/mac80211/tx.c
@@ -1935,6 +1935,8 @@ netdev_tx_t ieee80211_subif_start_xmit(s
head_need += IEEE80211_ENCRYPT_HEADROOM;
head_need += local->tx_headroom;
head_need = max_t(int, 0, head_need);
+ if (head_need < WEP_IV_LEN)
+ head_need = WEP_IV_LEN;
if (ieee80211_skb_resize(local, skb, head_need, true))
goto fail;
}
I'm certain that this is too simple minded, but it at least points to a place to
look. I have not bisected the problem to see which commit caused the regression,
but I can if you want.
Larry
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