ipv4: Fix crashes in fib_rules_tclass().
All paths assume, when CONFIG_IP_MULTIPLE_TABLES is enabled, that any successful call to fib_lookup() will initialize the fib_result->r value to something. We violated that expectation in the new fib_lookup() fast path. Reported-by: NOr Gerlitz <ogerlitz@mellanox.com> Tested-by: NEric Dumazet <eric.dumazet@gmail.com> Tested-by: NGreg Rose <gregory.v.rose@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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