net: fib_rules: Correctly set table field when table number exceeds 8 bits

[ Upstream commit 540e585a79e9d643ede077b73bcc7aa2d7b4d919 ]

In 709772e6e06564ed94ba740de70185ac3d792773, RT_TABLE_COMPAT was added to
allow legacy software to deal with routing table numbers >= 256, but the
same change to FIB rule queries was overlooked.

Signed-off-by: Jethro Beekman <jethro@fortanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 0ff3953..8916c5d 100644 (file)
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -968,7 +968,7 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
 
        frh = nlmsg_data(nlh);
        frh->family = ops->family;
-       frh->table = rule->table;
+       frh->table = rule->table < 256 ? rule->table : RT_TABLE_COMPAT;
        if (nla_put_u32(skb, FRA_TABLE, rule->table))
                goto nla_put_failure;
        if (nla_put_u32(skb, FRA_SUPPRESS_PREFIXLEN, rule->suppress_prefixlen))