linux-kernel - [PATCH 5.4 024/111] ice: Cleanup fltr list in case of allocation issues

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Date:   Mon, 12 Apr 2021 10:40:02 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Robert Malz <robertx.malz@...el.com>,
        Tony Brelinski <tonyx.brelinski@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>
Subject: [PATCH 5.4 024/111] ice: Cleanup fltr list in case of allocation issues

From: Robert Malz <robertx.malz@...el.com>

commit b7eeb52721fe417730fc5adc5cbeeb5fe349ab26 upstream.

When ice_remove_vsi_lkup_fltr is called, by calling
ice_add_to_vsi_fltr_list local copy of vsi filter list
is created. If any issues during creation of vsi filter
list occurs it up for the caller to free already
allocated memory. This patch ensures proper memory
deallocation in these cases.

Fixes: 80d144c9ac82 ("ice: Refactor switch rule management structures and functions")
Signed-off-by: Robert Malz <robertx.malz@...el.com>
Tested-by: Tony Brelinski <tonyx.brelinski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/intel/ice/ice_switch.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/intel/ice/ice_switch.c
+++ b/drivers/net/ethernet/intel/ice/ice_switch.c
@@ -2665,7 +2665,7 @@ ice_remove_vsi_lkup_fltr(struct ice_hw *
 					  &remove_list_head);
 	mutex_unlock(rule_lock);
 	if (status)
-		return;
+		goto free_fltr_list;
 
 	switch (lkup) {
 	case ICE_SW_LKUP_MAC:
@@ -2688,6 +2688,7 @@ ice_remove_vsi_lkup_fltr(struct ice_hw *
 		break;
 	}
 
+free_fltr_list:
 	list_for_each_entry_safe(fm_entry, tmp, &remove_list_head, list_entry) {
 		list_del(&fm_entry->list_entry);
 		devm_kfree(ice_hw_to_dev(hw), fm_entry);