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

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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: 0ddcf43d5d4a ("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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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);