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Subject: Re: mac80211 truesize bugs
From: David Miller <davem@davemloft.net>
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From: Johannes Berg <johannes@sipsolutions.net>
Date: Sun, 04 May 2008 16:06:30 +0200

> [  256.241496] KERNEL: assertion (!atomic_read(&sk->sk_wmem_alloc))
> failed at net/packet/af_packet.c (225)
> 
> any ideas about that?

This is exactly what happens if you change skb->truesize
when a socket is still attached to the skb.