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authorAlexander Duyck <alexander.h.duyck@intel.com>2017-01-02 13:32:54 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-15 13:41:35 +0100
commit807cac887d958250874bde823bae90ddcd35cefb (patch)
treec370960993a8732cfaaba0eeed27e32dfc49d944 /net/ipv4
parent0d431f94c1815aee201238c1b0cb5e337241abbe (diff)
ipv4: Do not allow MAIN to be alias for new LOCAL w/ custom rules
[ Upstream commit 5350d54f6cd12eaff623e890744c79b700bd3f17 ] 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/fib_frontend.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 63566ec54794..4e60dae86df5 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -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);