From: Michael Buesch <mb@xxxxxxxxx> Date: Tue, 25 Sep 2007 22:42:11 +0200 > I get dmesg spammed with the following message when > I connect to an open network with zd1211rw-mac80211. > I'm not sure if that's a bug in zd or mac80211. > Any idea how to debug this? > > [ 280.915811] SKB BUG: Invalid truesize (840) len=1440, sizeof(sk_buff)=168 > > The device keeps working fine while this spams dmesg. For anyone who investigates this, the issue is that if there is a socket associated with an skb (ie. skb->sk is non-NULL) you cannot change the skb->truesize without also adjusting the memory accounted to the socket. Otherwise when the SKB gets freed, the wrong amount of socket buffer memory allocation will be given back to the socket. When the above message triggers, it means the skb->truesize is smaller than skb->len plus the size of struct sk_buff which is obviously completely bogus. - To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
