Subject: Re: [PATCH] fib6: Fix fn->leaf == NULL race when inserting new nodes in fib6 tree

From: Thomas Graf <[email-masked]>
Date: Thu, 4 Jan 2007 20:21:47 +0100

* Thomas Graf <[email-masked]> 2007-01-04 10:39
> When inserting new nodes into a fib6 tree, the leaf pointer
> is first to NULL and later corrected when the key gets
> assigned. However, the tree is not locked for this period
> of time, therefore nodes with an invalid leaf pointer
> are accessible. Lookups that occur during this period of time
> expect a valid leaf pointer and thus crash.
> 
> This patch sets the leaf pointer to ip6_null_entry during
> this critical period of time.

Ignore this patch for now, the description is certainly inaccurate
even though it seems to fix the issue.