[dpdk-dev] [PATCH 21/27] net/ice/base: fix for dereference of null pointer

[Qi Zhang]

Added handling of allocation fault for ice_vsi_list_map_info
Should also check dereference of NULL pointer to filters VSI list
information for FWD_TO_VSI_LISt type only, otherwise, the FWD_TO_VSI type
filters by the given VSI can't be located.

Also the point *pi should not be NULL pointer, it is a reference to raw
data field, so remove this variable, use the reference directly.

Fixes: c7dd15931183 ("net/ice/base: add virtual switch code")
Cc: sta...@dpdk.org

Signed-off-by: Jacek Bułatek <jacekx.bula...@intel.com>
Signed-off-by: Haiyue Wang <haiyue.w...@intel.com>
Signed-off-by: Qi Zhang <qi.z.zh...@intel.com>
---
 drivers/net/ice/base/ice_switch.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ice/base/ice_switch.c 
b/drivers/net/ice/base/ice_switch.c
index 45c44ca256..fd2c1ccceb 100644
--- a/drivers/net/ice/base/ice_switch.c
+++ b/drivers/net/ice/base/ice_switch.c
@@ -4090,6 +4090,9 @@ ice_add_update_vsi_list(struct ice_hw *hw,
                        ice_create_vsi_list_map(hw, &vsi_handle_arr[0], 2,
                                                vsi_list_id);
 
+               if (!m_entry->vsi_list_info)
+                       return ICE_ERR_NO_MEMORY;
+
                /* If this entry was large action then the large action needs
                 * to be updated to point to FWD to VSI list
                 */
@@ -5423,6 +5426,7 @@ ice_vsi_uses_fltr(struct ice_fltr_mgmt_list_entry 
*fm_entry, u16 vsi_handle)
        return ((fm_entry->fltr_info.fltr_act == ICE_FWD_TO_VSI &&
                 fm_entry->fltr_info.vsi_handle == vsi_handle) ||
                (fm_entry->fltr_info.fltr_act == ICE_FWD_TO_VSI_LIST &&
+                fm_entry->vsi_list_info &&
                 (ice_is_bit_set(fm_entry->vsi_list_info->vsi_map,
                                 vsi_handle))));
 }
@@ -5497,14 +5501,12 @@ ice_add_to_vsi_fltr_list(struct ice_hw *hw, u16 
vsi_handle,
 
        LIST_FOR_EACH_ENTRY(fm_entry, lkup_list_head,
                            ice_fltr_mgmt_list_entry, list_entry) {
-               struct ice_fltr_info *fi;
-
-               fi = &fm_entry->fltr_info;
-               if (!fi || !ice_vsi_uses_fltr(fm_entry, vsi_handle))
+               if (!ice_vsi_uses_fltr(fm_entry, vsi_handle))
                        continue;
 
                status = ice_add_entry_to_vsi_fltr_list(hw, vsi_handle,
-                                                       vsi_list_head, fi);
+                                                       vsi_list_head,
+                                                       &fm_entry->fltr_info);
                if (status)
                        return status;
        }
-- 
2.26.2