This functionally reverts the check introduced by commit
e8ba330ac0c5 ("rtnetlink: Update fib dumps for strict data checking")
as modified by commit e4e92fb160d7 ("net/ipv4: Bail early if user only
wants prefix entries").

As we are preparing to fix listing of IPv4 cached routes, we need to
give userspace a way to request them.

Signed-off-by: Stefano Brivio <sbri...@redhat.com>
---
v5: No changes

v4: New patch

 net/ipv4/fib_frontend.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index c28d60d6c9d0..fced49e473c7 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -956,8 +956,8 @@ static int inet_dump_fib(struct sk_buff *skb, struct 
netlink_callback *cb)
                filter.flags = rtm->rtm_flags & (RTM_F_PREFIX | RTM_F_CLONED);
        }
 
-       /* fib entries are never clones and ipv4 does not use prefix flag */
-       if (filter.flags & (RTM_F_PREFIX | RTM_F_CLONED))
+       /* ipv4 does not use prefix flag */
+       if (filter.flags & RTM_F_PREFIX)
                return skb->len;
 
        if (filter.table_id) {
-- 
2.20.1

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