[PATCH 1/1] net: thunderx: avoid exposing kernel stack

Reserved fields should be set to zero to avoid exposing
bits from the kernel stack.

Signed-off-by: Heinrich Schuchardt <redacted>
---
 drivers/net/ethernet/cavium/thunder/nicvf_queues.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
index 8acd7c0..0ff8e60 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c

@@ -533,6 +533,7 @@ static void nicvf_rcv_queue_config(struct nicvf *nic, struct queue_set *qs,
                nicvf_config_vlan_stripping(nic, nic->netdev->features);

        /* Enable Receive queue */
+       memset(&rq_cfg, 0, sizeof(struct rq_cfg));
        rq_cfg.ena = 1;
        rq_cfg.tcp_ena = 0;
        nicvf_queue_reg_write(nic, NIC_QSET_RQ_0_7_CFG, qidx, *(u64 *)&rq_cfg);

@@ -565,6 +566,7 @@ void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs,
                              qidx, (u64)(cq->dmem.phys_base));

        /* Enable Completion queue */
+       memset(&cq_cfg, 0, sizeof(struct cq_cfg));
        cq_cfg.ena = 1;
        cq_cfg.reset = 0;
        cq_cfg.caching = 0;

@@ -613,6 +615,7 @@ static void nicvf_snd_queue_config(struct nicvf *nic, struct queue_set *qs,
                              qidx, (u64)(sq->dmem.phys_base));

        /* Enable send queue  & set queue size */
+       memset(&sq_cfg, 0, sizeof(struct sq_cfg));
        sq_cfg.ena = 1;
        sq_cfg.reset = 0;
        sq_cfg.ldwb = 0;

@@ -649,6 +652,7 @@ static void nicvf_rbdr_config(struct nicvf *nic, struct queue_set *qs,

        /* Enable RBDR  & set queue size */
        /* Buffer size should be in multiples of 128 bytes */
+       memset(&rbdr_cfg, 0, sizeof(struct rbdr_cfg));
        rbdr_cfg.ena = 1;
        rbdr_cfg.reset = 0;
        rbdr_cfg.ldwb = 0;
--

2.1.4