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debug: bufferoverflow mitigation in DebugComponent::on_shutdown() (#9422)

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@RubenKelevra 2025-07-10 05:01:21 +02:00 committed by Jesse Hills
parent a5055094d0
commit 5ba493acc3
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GPG Key ID: BEAAE804EFD8E83A
1 changed files with 2 additions and 0 deletions
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2
esphome/components/debug/debug_esp32.cpp
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@ -53,6 +53,7 @@ void DebugComponent::on_shutdown() {
auto pref = global_preferences->make_preference(REBOOT_MAX_LEN, fnv1_hash(REBOOT_KEY + App.get_name())); auto pref = global_preferences->make_preference(REBOOT_MAX_LEN, fnv1_hash(REBOOT_KEY + App.get_name()));
if (component != nullptr) { if (component != nullptr) {
strncpy(buffer, component->get_component_source(), REBOOT_MAX_LEN - 1); strncpy(buffer, component->get_component_source(), REBOOT_MAX_LEN - 1);
buffer[REBOOT_MAX_LEN - 1] = '\0';
} }
ESP_LOGD(TAG, "Storing reboot source: %s", buffer); ESP_LOGD(TAG, "Storing reboot source: %s", buffer);
pref.save(&buffer); pref.save(&buffer);
@ -68,6 +69,7 @@ std::string DebugComponent::get_reset_reason_() {
auto pref = global_preferences->make_preference(REBOOT_MAX_LEN, fnv1_hash(REBOOT_KEY + App.get_name())); auto pref = global_preferences->make_preference(REBOOT_MAX_LEN, fnv1_hash(REBOOT_KEY + App.get_name()));
char buffer[REBOOT_MAX_LEN]{}; char buffer[REBOOT_MAX_LEN]{};
if (pref.load(&buffer)) { if (pref.load(&buffer)) {
buffer[REBOOT_MAX_LEN - 1] = '\0';
reset_reason = "Reboot request from " + std::string(buffer); reset_reason = "Reboot request from " + std::string(buffer);
} }
} }