| Message ID | 20200424161944.6044-1-sudipm.mukherjee@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] thermal: ti-soc-thermal: avoid dereferencing ERR_PTR | expand |
On Fri, Apr 24, 2020 at 9:49 PM Sudip Mukherjee <sudipm.mukherjee@gmail.com> wrote: > > On error the function ti_bandgap_get_sensor_data() returns the error > code in ERR_PTR() but we only checked if the return value is NULL or > not. And, so we can dereference an error code inside ERR_PTR. > While at it, convert a check to IS_ERR_OR_NULL. > > Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> > --- > drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c > index d3e959d01606..85776db4bf34 100644 > --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c > +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c > @@ -169,7 +169,7 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, > > data = ti_bandgap_get_sensor_data(bgp, id); > > - if (!data || IS_ERR(data)) > + if (!IS_ERR_OR_NULL(data)) > data = ti_thermal_build_data(bgp, id); > > if (!data) > @@ -196,7 +196,7 @@ int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id) > > data = ti_bandgap_get_sensor_data(bgp, id); > > - if (data && data->ti_thermal) { > + if (!IS_ERR_OR_NULL(data) && data->ti_thermal) { > if (data->our_zone) > thermal_zone_device_unregister(data->ti_thermal); > } > @@ -262,7 +262,7 @@ int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id) > > data = ti_bandgap_get_sensor_data(bgp, id); > > - if (data) { > + if (!IS_ERR_OR_NULL(data)) { > cpufreq_cooling_unregister(data->cool_dev); > if (data->policy) > cpufreq_cpu_put(data->policy); > -- > 2.11.0 >
On 24/04/2020 18:19, Sudip Mukherjee wrote: > On error the function ti_bandgap_get_sensor_data() returns the error > code in ERR_PTR() but we only checked if the return value is NULL or > not. And, so we can dereference an error code inside ERR_PTR. > While at it, convert a check to IS_ERR_OR_NULL. > > Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> > --- Applied thanks
diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c index d3e959d01606..85776db4bf34 100644 --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c @@ -169,7 +169,7 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, data = ti_bandgap_get_sensor_data(bgp, id); - if (!data || IS_ERR(data)) + if (!IS_ERR_OR_NULL(data)) data = ti_thermal_build_data(bgp, id); if (!data) @@ -196,7 +196,7 @@ int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id) data = ti_bandgap_get_sensor_data(bgp, id); - if (data && data->ti_thermal) { + if (!IS_ERR_OR_NULL(data) && data->ti_thermal) { if (data->our_zone) thermal_zone_device_unregister(data->ti_thermal); } @@ -262,7 +262,7 @@ int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id) data = ti_bandgap_get_sensor_data(bgp, id); - if (data) { + if (!IS_ERR_OR_NULL(data)) { cpufreq_cooling_unregister(data->cool_dev); if (data->policy) cpufreq_cpu_put(data->policy);
On error the function ti_bandgap_get_sensor_data() returns the error code in ERR_PTR() but we only checked if the return value is NULL or not. And, so we can dereference an error code inside ERR_PTR. While at it, convert a check to IS_ERR_OR_NULL. Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> --- drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)