linux-kernel - [PATCH] thermal: k3_j72xx_bandgap: Fix memory leak in k3_j72xx_bandgap

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Message-Id: <20220627061529.42624-1-linmq006@gmail.com>
Date:   Mon, 27 Jun 2022 10:15:29 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>, Keerthy <j-keerthy@...com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] thermal: k3_j72xx_bandgap: Fix memory leak in k3_j72xx_bandgap_probe

ref_table is allocated in kzalloc, but it doesn't get freed in later
error paths. This function only release it in normal path.
Fix this by add err_free_ref_table label and goto this in some error
paths.

Fixes: ffcb2fc86eb7 ("thermal: k3_j72xx_bandgap: Add the bandgap driver
support")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/thermal/k3_j72xx_bandgap.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/k3_j72xx_bandgap.c b/drivers/thermal/k3_j72xx_bandgap.c
index 64e323158952..ce4a62148653 100644
--- a/drivers/thermal/k3_j72xx_bandgap.c
+++ b/drivers/thermal/k3_j72xx_bandgap.c
@@ -433,7 +433,7 @@ static int k3_j72xx_bandgap_probe(struct platform_device *pdev)
 				     GFP_KERNEL);
 	if (!derived_table) {
 		ret = -ENOMEM;
-		goto err_alloc;
+		goto err_free_ref_table;
 	}
 
 	/* Workaround not needed if bit30/bit31 is set even for J721e */
@@ -483,7 +483,7 @@ static int k3_j72xx_bandgap_probe(struct platform_device *pdev)
 		if (IS_ERR(ti_thermal)) {
 			dev_err(bgp->dev, "thermal zone device is NULL\n");
 			ret = PTR_ERR(ti_thermal);
-			goto err_alloc;
+			goto err_free_ref_table;
 		}
 	}
 
@@ -514,6 +514,8 @@ static int k3_j72xx_bandgap_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_free_ref_table:
+	kfree(ref_table);
 err_alloc:
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-- 
2.25.1