linux-kernel - [PATCH 4.19 46/48] i40e: Fix of memory leak and integer truncation in i40e

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Message-Id: <20200810151806.488530971@linuxfoundation.org>
Date:   Mon, 10 Aug 2020 17:22:08 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Martyna Szapar <martyna.szapar@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: [PATCH 4.19 46/48] i40e: Fix of memory leak and integer truncation in i40e_virtchnl.c

From: Martyna Szapar <martyna.szapar@...el.com>

[ Upstream commit 24474f2709af6729b9b1da1c5e160ab62e25e3a4 ]

Fixed possible memory leak in i40e_vc_add_cloud_filter function:
cfilter is being allocated and in some error conditions
the function returns without freeing the memory.

Fix of integer truncation from u16 (type of queue_id value) to u8
when calling i40e_vc_isvalid_queue_id function.

Fixes: e284fc280473b ("i40e: Add and delete cloud filter")
Signed-off-by: Martyna Szapar <martyna.szapar@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |   18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -181,7 +181,7 @@ static inline bool i40e_vc_isvalid_vsi_i
  * check for the valid queue id
  **/
 static inline bool i40e_vc_isvalid_queue_id(struct i40e_vf *vf, u16 vsi_id,
-					    u8 qid)
+					    u16 qid)
 {
 	struct i40e_pf *pf = vf->pf;
 	struct i40e_vsi *vsi = i40e_find_vsi_from_id(pf, vsi_id);
@@ -3345,7 +3345,7 @@ static int i40e_vc_add_cloud_filter(stru
 
 	if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) {
 		aq_ret = I40E_ERR_PARAM;
-		goto err;
+		goto err_out;
 	}
 
 	if (!vf->adq_enabled) {
@@ -3353,15 +3353,15 @@ static int i40e_vc_add_cloud_filter(stru
 			 "VF %d: ADq is not enabled, can't apply cloud filter\n",
 			 vf->vf_id);
 		aq_ret = I40E_ERR_PARAM;
-		goto err;
+		goto err_out;
 	}
 
 	if (i40e_validate_cloud_filter(vf, vcf)) {
 		dev_info(&pf->pdev->dev,
 			 "VF %d: Invalid input/s, can't apply cloud filter\n",
 			 vf->vf_id);
-			aq_ret = I40E_ERR_PARAM;
-			goto err;
+		aq_ret = I40E_ERR_PARAM;
+		goto err_out;
 	}
 
 	cfilter = kzalloc(sizeof(*cfilter), GFP_KERNEL);
@@ -3422,13 +3422,17 @@ static int i40e_vc_add_cloud_filter(stru
 			"VF %d: Failed to add cloud filter, err %s aq_err %s\n",
 			vf->vf_id, i40e_stat_str(&pf->hw, ret),
 			i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
-		goto err;
+		goto err_free;
 	}
 
 	INIT_HLIST_NODE(&cfilter->cloud_node);
 	hlist_add_head(&cfilter->cloud_node, &vf->cloud_filter_list);
+	/* release the pointer passing it to the collection */
+	cfilter = NULL;
 	vf->num_cloud_filters++;
-err:
+err_free:
+	kfree(cfilter);
+err_out:
 	return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_ADD_CLOUD_FILTER,
 				       aq_ret);
 }