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ipv4: Do not allow MAIN to be alias for new LOCAL w/ custom rules 

In the case of custom rules being present we need to handle the case of the
LOCAL table being intialized after the new rule has been added.  To address
that I am adding a new check so that we can make certain we don't use an
alias of MAIN for LOCAL when allocating a new table.

Fixes: 0ddcf43d5d ("ipv4: FIB Local/MAIN table collapse")
Reported-by: Oliver Brunel <jjk@jjacky.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2017-01-02 13:32:54 -08:00 committed by David S. Miller
parent 515028fe29
commit 5350d54f6c
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/fib_frontend.c
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@ -85,7 +85,7 @@ struct fib_table *fib_new_table(struct net *net, u32 id)
if (tb)
return tb;
if (id == RT_TABLE_LOCAL)
if (id == RT_TABLE_LOCAL && !net->ipv4.fib_has_custom_rules)
alias = fib_new_table(net, RT_TABLE_MAIN);
tb = fib_trie_table(id, alias);