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[84.115.212.250]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-421089ae976sm2522955e9.38.2024.05.23.14.25.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 May 2024 14:25:07 -0700 (PDT) From: Javier Carrasco Date: Thu, 23 May 2024 23:24:59 +0200 Subject: [PATCH 1/2] cpufreq: qcom-nvmem: fix memory leaks in probe error paths Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240523-qcom-cpufreq-nvmem_memleak-v1-1-e57795c7afa7@gmail.com> References: <20240523-qcom-cpufreq-nvmem_memleak-v1-0-e57795c7afa7@gmail.com> In-Reply-To: <20240523-qcom-cpufreq-nvmem_memleak-v1-0-e57795c7afa7@gmail.com> To: Ilia Lin , "Rafael J. Wysocki" , Viresh Kumar Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Carrasco , stable@vger.kernel.org X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1716499505; l=1662; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=O2/sXGTtESOtbSq7nRlWfIJXUquoXPpq1fCAs0u7NWM=; b=hDXfjlz34asjTGVR3glrM/1HXdLbwypLizTciKHHFWKpI2h6eO4bLt/MURAaJw3ZInhw0nxXn h9HLcnCN6PqB1VB7gSJwJib40hc+bEr9Yzu0qewfbFqYyHaqIDJpaTK X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= The code refactoring added new error paths between the np device node allocation and the call to of_node_put(), which leads to memory leaks if any of those errors occur. Add the missing of_node_put() in the error paths that require it. Cc: stable@vger.kernel.org Fixes: 57f2f8b4aa0c ("cpufreq: qcom: Refactor the driver to make it easier to extend") Signed-off-by: Javier Carrasco --- drivers/cpufreq/qcom-cpufreq-nvmem.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c index ea05d9d67490..5004e1dbc752 100644 --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c @@ -480,23 +480,30 @@ static int qcom_cpufreq_probe(struct platform_device *pdev) drv = devm_kzalloc(&pdev->dev, struct_size(drv, cpus, num_possible_cpus()), GFP_KERNEL); - if (!drv) + if (!drv) { + of_node_put(np); return -ENOMEM; + } match = pdev->dev.platform_data; drv->data = match->data; - if (!drv->data) + if (!drv->data) { + of_node_put(np); return -ENODEV; + } if (drv->data->get_version) { speedbin_nvmem = of_nvmem_cell_get(np, NULL); - if (IS_ERR(speedbin_nvmem)) + if (IS_ERR(speedbin_nvmem)) { + of_node_put(np); return dev_err_probe(cpu_dev, PTR_ERR(speedbin_nvmem), "Could not get nvmem cell\n"); + } ret = drv->data->get_version(cpu_dev, speedbin_nvmem, &pvs_name, drv); if (ret) { + of_node_put(np); nvmem_cell_put(speedbin_nvmem); return ret; }