[patch 28/46] netfilter: x_tables: fix match/target revision lookup

2.6.28-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Patrick McHardy <redacted>

Upstream commit 656caff:

Commit 55b69e91 (netfilter: implement NFPROTO_UNSPEC as a wildcard
for extensions) broke revision probing for matches and targets that
are registered with NFPROTO_UNSPEC.

Fix by continuing the search on the NFPROTO_UNSPEC list if nothing
is found on the af-specific lists.

Signed-off-by: Patrick McHardy <redacted>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 net/netfilter/x_tables.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c

@@ -273,6 +273,10 @@ static int match_revfn(u8 af, const char
 				have_rev = 1;
 		}
 	}
+
+	if (af != NFPROTO_UNSPEC && !have_rev)
+		return match_revfn(NFPROTO_UNSPEC, name, revision, bestp);
+
 	return have_rev;
 }
 

@@ -289,6 +293,10 @@ static int target_revfn(u8 af, const cha
 				have_rev = 1;
 		}
 	}
+
+	if (af != NFPROTO_UNSPEC && !have_rev)
+		return target_revfn(NFPROTO_UNSPEC, name, revision, bestp);
+
 	return have_rev;
 }