linux-kernel - [PATCH v2 01/23] interconnect: fix mem leak when freeing nodes

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Date:   Mon,  6 Mar 2023 08:56:29 +0100
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Georgi Djakov <djakov@...nel.org>
Cc:     "Shawn Guo" <shawnguo@...nel.org>,
        "Sascha Hauer" <s.hauer@...gutronix.de>,
        "Pengutronix Kernel Team" <kernel@...gutronix.de>,
        "Fabio Estevam" <festevam@...il.com>,
        "NXP Linux Team" <linux-imx@....com>,
        "Andy Gross" <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        "Sylwester Nawrocki" <s.nawrocki@...sung.com>,
        Artur Świgoń <a.swigon@...sung.com>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>,
        "Alim Akhtar" <alim.akhtar@...sung.com>,
        "Thierry Reding" <thierry.reding@...il.com>,
        "Jonathan Hunter" <jonathanh@...dia.com>, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>, stable@...r.kernel.org
Subject: [PATCH v2 01/23] interconnect: fix mem leak when freeing nodes

The node link array is allocated when adding links to a node but is not
deallocated when nodes are destroyed.

Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API")
Cc: stable@...r.kernel.org      # 5.1
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/interconnect/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 0f392f59b135..5217f449eeec 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -850,6 +850,10 @@ void icc_node_destroy(int id)
 
 	mutex_unlock(&icc_lock);
 
+	if (!node)
+		return;
+
+	kfree(node->links);
 	kfree(node);
 }
 EXPORT_SYMBOL_GPL(icc_node_destroy);
-- 
2.39.2