linux-kernel - [PATCH 4.9 23/78] i40e: Memory leak in i40e_config_iwarp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201117122110.246187544@linuxfoundation.org>
Date:   Tue, 17 Nov 2020 14:04:49 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Martyna Szapar <martyna.szapar@...el.com>,
        Andrew Bowers <andrewx.bowers@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 23/78] i40e: Memory leak in i40e_config_iwarp_qvlist

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

commit 0b63644602cfcbac849f7ea49272a39e90fa95eb upstream.

Added freeing the old allocation of vf->qvlist_info in function
i40e_config_iwarp_qvlist before overwriting it with
the new allocation.

Signed-off-by: Martyna Szapar <martyna.szapar@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
[bwh: Backported to 4.9: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@...ethink.co.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 .../ethernet/intel/i40e/i40e_virtchnl_pf.c    | 23 ++++++++++++-------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index e6798b0d1cae0..e3e02ec8f1498 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -417,6 +417,7 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
 	u32 v_idx, i, reg_idx, reg;
 	u32 next_q_idx, next_q_type;
 	u32 msix_vf, size;
+	int ret = 0;
 
 	msix_vf = pf->hw.func_caps.num_msix_vectors_vf;
 
@@ -425,16 +426,19 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
 			 "Incorrect number of iwarp vectors %u. Maximum %u allowed.\n",
 			 qvlist_info->num_vectors,
 			 msix_vf);
-		goto err;
+		ret = -EINVAL;
+		goto err_out;
 	}
 
 	size = sizeof(struct i40e_virtchnl_iwarp_qvlist_info) +
 	       (sizeof(struct i40e_virtchnl_iwarp_qv_info) *
 						(qvlist_info->num_vectors - 1));
+	kfree(vf->qvlist_info);
 	vf->qvlist_info = kzalloc(size, GFP_KERNEL);
-	if (!vf->qvlist_info)
-		return -ENOMEM;
-
+	if (!vf->qvlist_info) {
+		ret = -ENOMEM;
+		goto err_out;
+	}
 	vf->qvlist_info->num_vectors = qvlist_info->num_vectors;
 
 	msix_vf = pf->hw.func_caps.num_msix_vectors_vf;
@@ -445,8 +449,10 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
 		v_idx = qv_info->v_idx;
 
 		/* Validate vector id belongs to this vf */
-		if (!i40e_vc_isvalid_vector_id(vf, v_idx))
-			goto err;
+		if (!i40e_vc_isvalid_vector_id(vf, v_idx)) {
+			ret = -EINVAL;
+			goto err_free;
+		}
 
 		vf->qvlist_info->qv_info[i] = *qv_info;
 
@@ -488,10 +494,11 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
 	}
 
 	return 0;
-err:
+err_free:
 	kfree(vf->qvlist_info);
 	vf->qvlist_info = NULL;
-	return -EINVAL;
+err_out:
+	return ret;
 }
 
 /**
-- 
2.27.0