netdev - [PATCH net 1/2] octeontx2-pf: Fix possible memory leak in otx2

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Date:   Thu, 24 Nov 2022 09:56:43 +0800
From:   Ziyang Xuan <william.xuanziyang@...wei.com>
To:     <sgoutham@...vell.com>, <gakula@...vell.com>,
        <sbhatta@...vell.com>, <hkelam@...vell.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <netdev@...r.kernel.org>
CC:     <naveenm@...vell.com>, <rsaladi2@...vell.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH net 1/2] octeontx2-pf: Fix possible memory leak in otx2_probe()

In otx2_probe(), there are several possible memory leak bugs
in exception paths as follows:
1. Do not release pf->otx2_wq when excute otx2_init_tc() failed.
2. Do not shutdown tc when excute otx2_register_dl() failed.
3. Do not unregister devlink when initialize SR-IOV failed.

Fixes: 1d4d9e42c240 ("octeontx2-pf: Add tc flower hardware offload on ingress traffic")
Fixes: 2da489432747 ("octeontx2-pf: devlink params support to set mcam entry count")
Signed-off-by: Ziyang Xuan <william.xuanziyang@...wei.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 303930499a4c..8d7f2c3b0cfd 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -2900,7 +2900,7 @@ static int otx2_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	err = otx2_register_dl(pf);
 	if (err)
-		goto err_mcam_flow_del;
+		goto err_register_dl;
 
 	/* Initialize SR-IOV resources */
 	err = otx2_sriov_vfcfg_init(pf);
@@ -2919,8 +2919,11 @@ static int otx2_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	return 0;
 
 err_pf_sriov_init:
+	otx2_unregister_dl(pf);
+err_register_dl:
 	otx2_shutdown_tc(pf);
 err_mcam_flow_del:
+	destroy_workqueue(pf->otx2_wq);
 	otx2_mcam_flow_del(pf);
 err_unreg_netdev:
 	unregister_netdev(netdev);
-- 
2.25.1