diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2021-06-29 21:02:49 +0530 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2021-07-19 15:20:55 -0500 |
| commit | a89f355e469dcda129c2522be4fdba00c1c74c83 (patch) | |
| tree | ba5406274294728e2537e7763d1045e8b5e8257e /drivers/soc | |
| parent | b42000e4b8741bf6591fcbbbefff6aa745f8eb29 (diff) | |
soc: qcom: aoss: Fix the out of bound usage of cooling_devs
In "qmp_cooling_devices_register", the count value is initially
QMP_NUM_COOLING_RESOURCES, which is 2. Based on the initial count value,
the memory for cooling_devs is allocated. Then while calling the
"qmp_cooling_device_add" function, count value is post-incremented for
each child node.
This makes the out of bound access to the cooling_dev array. Fix it by
passing the QMP_NUM_COOLING_RESOURCES definition to devm_kzalloc() and
initializing the count to 0.
While at it, let's also free the memory allocated to cooling_dev if no
cooling device is found in DT and during unroll phase.
Cc: stable@vger.kernel.org # 5.4
Fixes: 05589b30b21a ("soc: qcom: Extend AOSS QMP driver to support resources that are used to wake up the SoC.")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210629153249.73428-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/qcom/qcom_aoss.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/soc/qcom/qcom_aoss.c b/drivers/soc/qcom/qcom_aoss.c index 92a1af70a649..536c3e4114fb 100644 --- a/drivers/soc/qcom/qcom_aoss.c +++ b/drivers/soc/qcom/qcom_aoss.c @@ -476,12 +476,12 @@ static int qmp_cooling_device_add(struct qmp *qmp, static int qmp_cooling_devices_register(struct qmp *qmp) { struct device_node *np, *child; - int count = QMP_NUM_COOLING_RESOURCES; + int count = 0; int ret; np = qmp->dev->of_node; - qmp->cooling_devs = devm_kcalloc(qmp->dev, count, + qmp->cooling_devs = devm_kcalloc(qmp->dev, QMP_NUM_COOLING_RESOURCES, sizeof(*qmp->cooling_devs), GFP_KERNEL); @@ -497,12 +497,16 @@ static int qmp_cooling_devices_register(struct qmp *qmp) goto unroll; } + if (!count) + devm_kfree(qmp->dev, qmp->cooling_devs); + return 0; unroll: while (--count >= 0) thermal_cooling_device_unregister (qmp->cooling_devs[count].cdev); + devm_kfree(qmp->dev, qmp->cooling_devs); return ret; } |