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thermal/of: Fix potential uninitialized value access 

If of_parse_phandle_with_args() called from __thermal_of_bind() or
__thermal_of_unbind() fails, cooling_spec.np will not be initialized,
so move the of_node_put() calls below the respective return value checks
to avoid dereferencing an uninitialized pointer.

Fixes: 3fd6d6e2b4 ("thermal/of: Rework the thermal device tree initialization")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Peng Fan 2023-07-19 09:16:36 +08:00 committed by Rafael J. Wysocki
parent b616959a59
commit f96801f0cf
1 changed files with 4 additions and 4 deletions
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8
drivers/thermal/thermal_of.c
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@ -291,13 +291,13 @@ static int __thermal_of_unbind(struct device_node *map_np, int index, int trip_i
ret = of_parse_phandle_with_args(map_np, "cooling-device", "#cooling-cells",
index, &cooling_spec);
of_node_put(cooling_spec.np);
if (ret < 0) {
pr_err("Invalid cooling-device entry\n");
return ret;
}
of_node_put(cooling_spec.np);
if (cooling_spec.args_count < 2) {
pr_err("wrong reference to cooling device, missing limits\n");
return -EINVAL;
@ -324,13 +324,13 @@ static int __thermal_of_bind(struct device_node *map_np, int index, int trip_id,
ret = of_parse_phandle_with_args(map_np, "cooling-device", "#cooling-cells",
index, &cooling_spec);
of_node_put(cooling_spec.np);
if (ret < 0) {
pr_err("Invalid cooling-device entry\n");
return ret;
}
of_node_put(cooling_spec.np);
if (cooling_spec.args_count < 2) {
pr_err("wrong reference to cooling device, missing limits\n");
return -EINVAL;