diff mbox series

[v2,12/16] ice: Fix potential null pointer issues

Message ID 20180920004308.13772-13-anirudh.venkataramanan@intel.com
State Accepted
Delegated to: Jeff Kirsher
Headers show
Series Add SR-IOV support, feature updates | expand

Commit Message

Anirudh Venkataramanan Sept. 20, 2018, 12:43 a.m. UTC 
From: Dave Ertman <david.m.ertman@intel.com>

Add checks in the filter handling flow to avoid dereferencing
NULL pointers.

Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
---
[Anirudh Venkataramanan <anirudh.venkataramanan@intel.com> minor cleanup for upstream submission]
---
 drivers/net/ethernet/intel/ice/ice_switch.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

Comments

Bowers, AndrewX Sept. 26, 2018, 5:08 p.m. UTC | #1 
> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@osuosl.org] On
> Behalf Of Anirudh Venkataramanan
> Sent: Wednesday, September 19, 2018 5:43 PM
> To: intel-wired-lan@lists.osuosl.org
> Subject: [Intel-wired-lan] [PATCH v2 12/16] ice: Fix potential null pointer
> issues
> 
> From: Dave Ertman <david.m.ertman@intel.com>
> 
> Add checks in the filter handling flow to avoid dereferencing NULL pointers.
> 
> Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
> Signed-off-by: Anirudh Venkataramanan
> <anirudh.venkataramanan@intel.com>
> ---
> [Anirudh Venkataramanan <anirudh.venkataramanan@intel.com> minor
> cleanup for upstream submission]
> ---
>  drivers/net/ethernet/intel/ice/ice_switch.c | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
index c6d673bd5eaa..2a3d4a72ab3c 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.c
+++ b/drivers/net/ethernet/intel/ice/ice_switch.c
@@ -2010,12 +2010,12 @@  ice_cfg_dflt_vsi(struct ice_hw *hw, u16 vsi_handle, bool set, u8 direction)
 enum ice_status
 ice_remove_mac(struct ice_hw *hw, struct list_head *m_list)
 {
-	struct ice_fltr_list_entry *list_itr;
+	struct ice_fltr_list_entry *list_itr, *tmp;
 
 	if (!m_list)
 		return ICE_ERR_PARAM;
 
-	list_for_each_entry(list_itr, m_list, list_entry) {
+	list_for_each_entry_safe(list_itr, tmp, m_list, list_entry) {
 		enum ice_sw_lkup_type l_type = list_itr->fltr_info.lkup_type;
 
 		if (l_type != ICE_SW_LKUP_MAC)
@@ -2037,12 +2037,12 @@  ice_remove_mac(struct ice_hw *hw, struct list_head *m_list)
 enum ice_status
 ice_remove_vlan(struct ice_hw *hw, struct list_head *v_list)
 {
-	struct ice_fltr_list_entry *v_list_itr;
+	struct ice_fltr_list_entry *v_list_itr, *tmp;
 
 	if (!v_list || !hw)
 		return ICE_ERR_PARAM;
 
-	list_for_each_entry(v_list_itr, v_list, list_entry) {
+	list_for_each_entry_safe(v_list_itr, tmp, v_list, list_entry) {
 		enum ice_sw_lkup_type l_type = v_list_itr->fltr_info.lkup_type;
 
 		if (l_type != ICE_SW_LKUP_VLAN)
@@ -2142,7 +2142,7 @@  ice_add_to_vsi_fltr_list(struct ice_hw *hw, u16 vsi_handle,
 		struct ice_fltr_info *fi;
 
 		fi = &fm_entry->fltr_info;
-		if (!ice_vsi_uses_fltr(fm_entry, vsi_handle))
+		if (!fi || !ice_vsi_uses_fltr(fm_entry, vsi_handle))
 			continue;
 
 		status = ice_add_entry_to_vsi_fltr_list(hw, vsi_handle,
@@ -2259,7 +2259,8 @@  ice_replay_vsi_fltr(struct ice_hw *hw, u16 vsi_handle, u8 recp_id,
 				goto end;
 			continue;
 		}
-		if (!test_bit(vsi_handle, itr->vsi_list_info->vsi_map))
+		if (!itr->vsi_list_info ||
+		    !test_bit(vsi_handle, itr->vsi_list_info->vsi_map))
 			continue;
 		/* Clearing it so that the logic can add it back */
 		clear_bit(vsi_handle, itr->vsi_list_info->vsi_map);