Re: [PATCH] ipv6: Prevent access to uninitialized fib_table_hash via /proc/net/ipv6_route

From: Thomas Graf <tgraf@suug.ch>
Date: Tue, 19 Jun 2012 07:36:02 -0400

On Fri, Jun 15, 2012 at 03:32:40PM -0700, David Miller wrote:

quoted

Since you're snooping around in here, you might notice that on network
namespace shutdown, we leak all user configured ipv6 FIB rules.

I looked into this. fib_rules_unregister() will free all rules
belonging to the address family in that namespace.

Or were you referring to other rules?

Sorry, the leak I saw was for the fib6 tables, not the rules
themselves.

IPV4 has ip_fib_net_exit() which walks the FIB4 table hash
and releases everything.

I couldn't find the IPV6 counterpart.  All I could find was code which
explicitly liberates the ipv6 main and local tables.

There is no ipv6 code I can find which traverses fib_table_hash and
liberates the dynamically generated tables.