4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sven Eckelmann <sven.eckelmann@xxxxxxxxxxxx>
[ Upstream commit 011c935fceae5252619ef730baa610c655281dda ]
The function batadv_v_gw_dump stops the processing loop when
batadv_v_gw_dump_entry returns a non-0 return code. This should only
happen when the buffer is full. Otherwise, an empty message may be
returned by batadv_gw_dump. This empty message will then stop the netlink
dumping of gateway entries. At worst, not a single entry is returned to
userspace even when plenty of possible gateways exist.
Fixes: b71bb6f924fe ("batman-adv: add B.A.T.M.A.N. V bat_gw_dump implementations")
Signed-off-by: Sven Eckelmann <sven.eckelmann@xxxxxxxxxxxx>
Signed-off-by: Simon Wunderlich <sw@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/batman-adv/bat_v.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/batman-adv/bat_v.c
+++ b/net/batman-adv/bat_v.c
@@ -930,7 +930,7 @@ static int batadv_v_gw_dump_entry(struct
struct batadv_neigh_ifinfo *router_ifinfo = NULL;
struct batadv_neigh_node *router;
struct batadv_gw_node *curr_gw;
- int ret = -EINVAL;
+ int ret = 0;
void *hdr;
router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
