IB/core: When marshaling uverbs path, clear unused fields

When marsheling a user path to the kernel struct ib_sa_path, need
to zero smac, dmac and set the vlan id to the "no vlan" value.

Fixes: dd5f03beb4f7 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Reported-by: Aleksey Senin <alekseys@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/infiniband/core/uverbs_marshall.c b/drivers/infiniband/core/uverbs_marshall.c
index e7bee46868d1..abd97247443e 100644
--- a/drivers/infiniband/core/uverbs_marshall.c
+++ b/drivers/infiniband/core/uverbs_marshall.c
@@ -140,5 +140,9 @@ void ib_copy_path_rec_from_user(struct ib_sa_path_rec *dst,
         dst->packet_life_time   = src->packet_life_time;
         dst->preference         = src->preference;
         dst->packet_life_time_selector = src->packet_life_time_selector;
+
+        memset(dst->smac, 0, sizeof(dst->smac));
+        memset(dst->dmac, 0, sizeof(dst->dmac));
+        dst->vlan_id = 0xffff;
 }
 EXPORT_SYMBOL(ib_copy_path_rec_from_user);