[PATCH v7 18/47] net/sxe2: validate PCI map resource type

[liujie5 at linkdatatechnology.com]

From: Jie Liu <liujie5 at linkdatatechnology.com>

sxe2_dev_pci_res_seg_map() indexes adapter->map_ctxt.addr_info[] with
res_type without bounds checking, which can access out of bounds when
an invalid resource type is passed.

Add a bounds check on res_type and return -EINVAL.

Fixes: 66a10eb60ebe ("net/sxe2: add PCI BAR mapping")
Cc: stable at dpdk.org
Cc: stephen at networkplumber.org
Signed-off-by: Jie Liu <liujie5 at linkdatatechnology.com>
---
 drivers/net/sxe2/sxe2_ethdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/sxe2/sxe2_ethdev.c b/drivers/net/sxe2/sxe2_ethdev.c
index 589f09c113..9ef93b8076 100644
--- a/drivers/net/sxe2/sxe2_ethdev.c
+++ b/drivers/net/sxe2/sxe2_ethdev.c
@@ -1552,6 +1552,12 @@ int32_t sxe2_dev_pci_res_seg_map(struct sxe2_adapter *adapter,
 	struct sxe2_pci_map_addr_info *addr_info = NULL;
 	int32_t ret = 0;
 
+	if (unlikely(res_type >= SXE2_PCI_MAP_RES_MAX_COUNT)) {
+		PMD_DEV_LOG_ERR(adapter, INIT, "Invalid resource type %u", res_type);
+		ret = -EINVAL;
+		goto l_end;
+	}
+
 	addr_info = &adapter->map_ctxt.addr_info[res_type];
 	if (!addr_info || addr_info->bar_idx == SXE2_PCI_MAP_BAR_INVALID) {
 		PMD_DEV_LOG_ERR(adapter, INIT, "Invalid bar index with resource type %d", res_type);
-- 
2.52.0