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From:   gregkh@linuxfoundation.org
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, kernel test robot <lkp@intel.com>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Shawn Guo <shawn.guo@linaro.org>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.11 242/306] cpufreq: qcom-hw: fix dereferencing freed memory data
Date:   Mon, 15 Mar 2021 14:55:05 +0100
Message-Id: <20210315135515.824595904@linuxfoundation.org>
In-Reply-To: <20210315135507.611436477@linuxfoundation.org>
References: <20210315135507.611436477@linuxfoundation.org>
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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

From: Shawn Guo <shawn.guo@linaro.org>

[ Upstream commit 02fc409540303801994d076fcdb7064bd634dbf3 ]

Commit 67fc209b527d ("cpufreq: qcom-hw: drop devm_xxx() calls from
init/exit hooks") introduces an issue of dereferencing freed memory
'data'.  Fix it.

Fixes: 67fc209b527d ("cpufreq: qcom-hw: drop devm_xxx() calls from init/exit hooks")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/cpufreq/qcom-cpufreq-hw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 2726e77c9e5a..5cdd20e38771 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -368,7 +368,7 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
 error:
 	kfree(data);
 unmap_base:
-	iounmap(data->base);
+	iounmap(base);
 release_region:
 	release_mem_region(res->start, resource_size(res));
 	return ret;
-- 
2.30.1