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thermal: core: Use strnlen() in thermal_zone_device_register_with_trips()

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Replace strlen() with the safer strnlen() and calculate the length of
the thermal zone name 'type' only once.

No functional changes.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
[ rjw: Subject edits ]
Link: https://patch.msgid.link/20251216130943.40180-2-thorsten.blum@linux.dev
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Thorsten Blum
2025-12-16 14:09:44 +01:00
committed by Rafael J. Wysocki
parent 9ace4753a5
commit 1d97b8e3bf
1 changed files with 6 additions and 2 deletions
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8
drivers/thermal/thermal_core.c
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@@ -1505,15 +1505,19 @@ thermal_zone_device_register_with_trips(const char *type,
const struct thermal_trip *trip = trips;
struct thermal_zone_device *tz;
struct thermal_trip_desc *td;
size_t type_len = 0;
int id;
int result;
if (!type || strlen(type) == 0) {
if (type)
type_len = strnlen(type, THERMAL_NAME_LENGTH);
if (type_len == 0) {
pr_err("No thermal zone type defined\n");
return ERR_PTR(-EINVAL);
}
if (strlen(type) >= THERMAL_NAME_LENGTH) {
if (type_len == THERMAL_NAME_LENGTH) {
pr_err("Thermal zone name (%s) too long, should be under %d chars\n",
type, THERMAL_NAME_LENGTH);
return ERR_PTR(-EINVAL);