blob: 60ba40becee33152fd5495769dc500ed6e47bc3a [file] [log] [blame]
From 8a430ed50bb1b19ca14a46661f3b1b35f2fb5c39 Mon Sep 17 00:00:00 2001
From: David Ahern <dsa@cumulusnetworks.com>
Date: Wed, 11 Jan 2017 15:42:17 -0800
Subject: [PATCH] net: ipv4: fix table id in getroute response
commit 8a430ed50bb1b19ca14a46661f3b1b35f2fb5c39 upstream.
rtm_table is an 8-bit field while table ids are allowed up to u32. Commit
709772e6e065 ("net: Fix routing tables with id > 255 for legacy software")
added the preference to set rtm_table in dumps to RT_TABLE_COMPAT if the
table id is > 255. The table id returned on get route requests should do
the same.
Fixes: c36ba6603a11 ("net: Allow user to get table id from route lookup")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 0fcac8e7a2b2..709ffe67d1de 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2472,7 +2472,7 @@ static int rt_fill_info(struct net *net, __be32 dst, __be32 src, u32 table_id,
r->rtm_dst_len = 32;
r->rtm_src_len = 0;
r->rtm_tos = fl4->flowi4_tos;
- r->rtm_table = table_id;
+ r->rtm_table = table_id < 256 ? table_id : RT_TABLE_COMPAT;
if (nla_put_u32(skb, RTA_TABLE, table_id))
goto nla_put_failure;
r->rtm_type = rt->rt_type;
--
2.12.0