diff options
| author | Peng Fan <peng.fan@nxp.com> | 2023-07-19 04:16:36 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-08-22 22:22:02 +0300 |
| commit | f96801f0cfcefc0a16b146596577c53c75ee9773 (patch) | |
| tree | a3ee4724b389a0148678c4d6a94536eae0db544e /drivers/thermal | |
| parent | b616959a59eed098fe34aa156d96c37880feabc6 (diff) | |
| download | linux-f96801f0cfcefc0a16b146596577c53c75ee9773.tar.xz | |
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: 3fd6d6e2b4e8 ("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>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/thermal_of.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index 330690a3a208..4ca905723429 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -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; |