From: Alexander Aring <alex.ar...@gmail.com>
Date: Tue, 4 Feb 2014 11:57:53 +0100
> @@ -197,7 +197,9 @@ static void lowpan_fragment_timer_expired(unsigned long
> entry_addr)
>
> pr_debug("timer expired for frame with tag %d\n", entry->tag);
>
> + spin_lock_bh(&flist_lock);
> list_del(&entry->list);
> + spin_unlock_bh(&flist_lock);
> dev_kfree_skb(entry->skb);
> kfree(entry);
> }
This will deadlock, because the other code path holding flist_lock calls
del_timer_sync() to wait for this timer to return.
The synchornization in this code is really a big mess.
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