From: Rahul Gupta <rahul.gupta@broadcom.com>
Date: Tue, 1 May 2018 01:06:09 +0000 (-0700)
Subject: net/bnxt: validate structs and pointers before use
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=f7b36e8f36e8f3bbebd9f4843466580354aa8179;p=dpdk.git

net/bnxt: validate structs and pointers before use

Validate pointers aren't pointing to uninitialized areas
including txq and rxq before using them to avoid
bnxt driver from crashing.

Signed-off-by: Rahul Gupta <rahul.gupta@broadcom.com>
Signed-off-by: Jay Ding <jay.ding@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Tested-by: Randy Schacher <stuart.schacher@broadcom.com>
---

diff --git a/drivers/net/bnxt/bnxt_ring.c b/drivers/net/bnxt/bnxt_ring.c
index 8e822e11fc..aa9f3f4cc7 100644
--- a/drivers/net/bnxt/bnxt_ring.c
+++ b/drivers/net/bnxt/bnxt_ring.c
@@ -24,6 +24,9 @@
 
 void bnxt_free_ring(struct bnxt_ring *ring)
 {
+	if (!ring)
+		return;
+
 	if (ring->vmem_size && *ring->vmem) {
 		memset((char *)*ring->vmem, 0, ring->vmem_size);
 		*ring->vmem = NULL;
diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c
index 4e6fa4e305..4b380d4f0b 100644
--- a/drivers/net/bnxt/bnxt_rxq.c
+++ b/drivers/net/bnxt/bnxt_rxq.c
@@ -23,10 +23,8 @@
 
 void bnxt_free_rxq_stats(struct bnxt_rx_queue *rxq)
 {
-	struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
-
-	if (cpr->hw_stats)
-		cpr->hw_stats = NULL;
+	if (rxq && rxq->cp_ring && rxq->cp_ring->hw_stats)
+		rxq->cp_ring->hw_stats = NULL;
 }
 
 int bnxt_mq_rx_configure(struct bnxt *bp)
diff --git a/drivers/net/bnxt/bnxt_txq.c b/drivers/net/bnxt/bnxt_txq.c
index b50f37cf26..b9b975e4c8 100644
--- a/drivers/net/bnxt/bnxt_txq.c
+++ b/drivers/net/bnxt/bnxt_txq.c
@@ -19,10 +19,8 @@
 
 void bnxt_free_txq_stats(struct bnxt_tx_queue *txq)
 {
-	struct bnxt_cp_ring_info *cpr = txq->cp_ring;
-
-	if (cpr->hw_stats)
-		cpr->hw_stats = NULL;
+	if (txq && txq->cp_ring && txq->cp_ring->hw_stats)
+		txq->cp_ring->hw_stats = NULL;
 }
 
 static void bnxt_tx_queue_release_mbufs(struct bnxt_tx_queue *txq)
@@ -30,6 +28,9 @@ static void bnxt_tx_queue_release_mbufs(struct bnxt_tx_queue *txq)
 	struct bnxt_sw_tx_bd *sw_ring;
 	uint16_t i;
 
+	if (!txq)
+		return;
+
 	sw_ring = txq->tx_ring->tx_buf_ring;
 	if (sw_ring) {
 		for (i = 0; i < txq->tx_ring->tx_ring_struct->ring_size; i++) {