[PATCH] net/ice: fix segfault in secondary process by validating dev_private pointer

[Khadem Ullah <14pwcse1224@uetpeshawar.edu.pk>]

In secondary processes, accessing 'dev->data->dev_private' directly can
cause a segmentation fault if the primary process has exited or the
shared memory is unavailable.

This patch adds a check for dev/data/dev_private and uses
rte_mem_virt2phy to ensure the pointer is still valid.

Fixes: 690175ee51bf ('net/ice: support getting device information')
Cc: stable@dpdk.org

Signed-off-by: Khadem Ullah <14pwcse1224@uetpeshawar.edu.pk>
---
 drivers/net/intel/ice/ice_ethdev.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/intel/ice/ice_ethdev.c b/drivers/net/intel/ice/ice_ethdev.c
index 513777e372..f0ba3626bb 100644
--- a/drivers/net/intel/ice/ice_ethdev.c
+++ b/drivers/net/intel/ice/ice_ethdev.c
@@ -4090,6 +4090,15 @@ ice_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 {
 	struct ice_pf *pf = ICE_DEV_PRIVATE_TO_PF(dev->data->dev_private);
 	struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
+		(dev == NULL || dev->data == NULL ||
+		dev->data->dev_private == NULL ||
+		rte_mem_virt2phy(dev->data->dev_private) == RTE_BAD_PHYS_ADDR)) {
+			PMD_DRV_LOG(ERR,
+			"Secondary: dev_private not accessible (primary exited?)");
+			rte_errno = ENODEV;
+			return -rte_errno;
+	}
 	struct ice_vsi *vsi = pf->main_vsi;
 	struct rte_pci_device *pci_dev = RTE_DEV_TO_PCI(dev->device);
 	bool is_safe_mode = pf->adapter->is_safe_mode;
-- 
2.43.0