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From: Thomas Graf <tgraf@suug.ch>
To: davem@davemloft.net
Cc: yoshfuji@linux-ipv6.org, netdev@vger.kernel.org
Subject: Re: [PATCH] fib6: Fix fn->leaf == NULL race when inserting new nodes in fib6 tree
Date: Thu, 4 Jan 2007 20:21:47 +0100	[thread overview]
Message-ID: <20070104192147.GD8693@postel.suug.ch> (raw)
In-Reply-To: <20070104093921.GC8693@postel.suug.ch>

* Thomas Graf <tgraf@suug.ch> 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.

  reply	other threads:[~2007-01-04 19:21 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-04  9:39 [PATCH] fib6: Fix fn->leaf == NULL race when inserting new nodes in fib6 tree Thomas Graf
2007-01-04 19:21 ` Thomas Graf [this message]
2007-01-04 20:24   ` David Miller

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