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Fix null pointer dereferences in SettingsScreen index helpers

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lowBatIndex(), autoOffIndex(), gpsIntervalIndex() each called
getNodePrefs() independently without null check, while renderItem()
had its own guarded copy. Added null checks consistent with the rest
of the class. Also initialize _node_prefs to NULL in UITask constructor.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-05-10 20:26:05 +02:00
co-authored by Claude Sonnet 4.6
parent 3abc5e1e1c
commit d35c7d2d74
2 changed files with 12 additions and 9 deletions
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examples/companion_radio/ui-new/UITask.cpp
+11 -8
View File
@@ -116,10 +116,11 @@ class SettingsScreen : public UIScreen {
static const int BATT_DISPLAY_COUNT = 3;
int lowBatIndex() {
uint16_t v = _task->getNodePrefs()->low_batt_mv;
NodePrefs* p = _task->getNodePrefs();
if (!p) return 0;
for (int i = 0; i < LOW_BAT_COUNT; i++)
if (LOW_BAT_OPTS[i] == v) return i;
return 0; // default: off
if (LOW_BAT_OPTS[i] == p->low_batt_mv) return i;
return 0;
}
void renderBar(DisplayDriver& display, int x, int y, int value, int max_val) {
@@ -132,17 +133,19 @@ class SettingsScreen : public UIScreen {
}
int autoOffIndex() {
uint16_t v = _task->getNodePrefs()->auto_off_secs;
NodePrefs* p = _task->getNodePrefs();
if (!p) return 1;
for (int i = 0; i < AUTO_OFF_COUNT; i++)
if (AUTO_OFF_OPTS[i] == v) return i;
return 1; // default: 15s
if (AUTO_OFF_OPTS[i] == p->auto_off_secs) return i;
return 1;
}
#if ENV_INCLUDE_GPS == 1
int gpsIntervalIndex() {
uint32_t v = _task->getNodePrefs()->gps_interval;
NodePrefs* p = _task->getNodePrefs();
if (!p) return 0;
for (int i = 0; i < GPS_INTERVAL_COUNT; i++)
if (GPS_INTERVAL_OPTS[i] == v) return i;
if (GPS_INTERVAL_OPTS[i] == p->gps_interval) return i;
return 0;
}
#endif
examples/companion_radio/ui-new/UITask.h
+1 -1
View File
@@ -68,7 +68,7 @@ class UITask : public AbstractUITask {
public:
UITask(mesh::MainBoard* board, BaseSerialInterface* serial) : AbstractUITask(board, serial), _display(NULL), _sensors(NULL) {
UITask(mesh::MainBoard* board, BaseSerialInterface* serial) : AbstractUITask(board, serial), _display(NULL), _sensors(NULL), _node_prefs(NULL) {
next_batt_chck = _next_refresh = 0;
ui_started_at = 0;
_batt_mv = 0;