RDMA/irdma: Fix VLAN connection with wildcard address

[ Upstream commit 82ab2b52654c43ba24a3f6603fec40874cc5a7e5 ]

When an application listens on a wildcard address, and there are VLAN and
non-VLAN IP addresses, iWARP connection establishemnt can fail if the listen
node VLAN ID does not match.

Fix this by checking the vlan_id only if not a wildcard listen node.

Fixes: 146b9756f14c ("RDMA/irdma: Add connection manager")
Link: https://lore.kernel.org/r/20220705230815.265-7-shiraz.saleem@intel.com
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/infiniband/hw/irdma/cm.c b/drivers/infiniband/hw/irdma/cm.c
index 60d4e9c..b08c67b 100644 (file)
--- a/drivers/infiniband/hw/irdma/cm.c
+++ b/drivers/infiniband/hw/irdma/cm.c
@@ -1477,12 +1477,13 @@ irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, u16 dst_port,
        list_for_each_entry (listen_node, &cm_core->listen_list, list) {
                memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
                listen_port = listen_node->loc_port;
+               if (listen_port != dst_port ||
+                   !(listener_state & listen_node->listener_state))
+                       continue;
                /* compare node pair, return node handle if a match */
-               if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
-                    !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
-                   listen_port == dst_port &&
-                   vlan_id == listen_node->vlan_id &&
-                   (listener_state & listen_node->listener_state)) {
+               if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) ||
+                   (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) &&
+                    vlan_id == listen_node->vlan_id)) {
                        refcount_inc(&listen_node->refcnt);
                        spin_unlock_irqrestore(&cm_core->listen_list_lock,
                                               flags);