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[light] Fix dangling reference in compute_color_mode causing memory corruption (#11868)

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This commit is contained in:
J. Nick Koston
2025-11-12 18:41:28 -06:00
committed by GitHub
parent 769137fc09
commit 735bf9930a
3 changed files with 5 additions and 3 deletions
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3
esphome/components/api/api_connection.cpp
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@@ -476,8 +476,9 @@ uint16_t APIConnection::try_send_light_info(EntityBase *entity, APIConnection *c
auto *light = static_cast<light::LightState *>(entity);
ListEntitiesLightResponse msg;
auto traits = light->get_traits();
auto supported_modes = traits.get_supported_color_modes();
// Pass pointer to ColorModeMask so the iterator can encode actual ColorMode enum values
msg.supported_color_modes = &traits.get_supported_color_modes();
msg.supported_color_modes = &supported_modes;
if (traits.supports_color_capability(light::ColorCapability::COLOR_TEMPERATURE) ||
traits.supports_color_capability(light::ColorCapability::COLD_WARM_WHITE)) {
msg.min_mireds = traits.get_min_mireds();

2
esphome/components/light/light_call.cpp
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@@ -406,7 +406,7 @@ void LightCall::transform_parameters_() {
}
}
ColorMode LightCall::compute_color_mode_() {
const auto &supported_modes = this->parent_->get_traits().get_supported_color_modes();
auto supported_modes = this->parent_->get_traits().get_supported_color_modes();
int supported_count = supported_modes.size();
// Some lights don't support any color modes (e.g. monochromatic light), leave it at unknown.

3
esphome/components/light/light_traits.h
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@@ -18,7 +18,8 @@ class LightTraits {
public:
LightTraits() = default;
const ColorModeMask &get_supported_color_modes() const { return this->supported_color_modes_; }
// Return by value to avoid dangling reference when get_traits() returns a temporary
ColorModeMask get_supported_color_modes() const { return this->supported_color_modes_; }
void set_supported_color_modes(ColorModeMask supported_color_modes) {
this->supported_color_modes_ = supported_color_modes;
}