fix(sway): resolve destruction dependency between Ipc and SleeperThread

Ipc destructor closes socket and thus wakes up SleeperThread which was
waiting for socket data in Ipc::handleEvent.
Ipc::handleEvent then proceeds with sending signal to already destroyed
object, causing heap-use-after-free Address Sanitizer error.
This commit is contained in:
Aleksei Bavshin 2019-08-27 19:43:03 -07:00
parent 83b12fc8a7
commit ae6ca36fa7
No known key found for this signature in database
GPG Key ID: 4F071603387A382A
8 changed files with 37 additions and 54 deletions

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@ -8,6 +8,7 @@
#include <memory>
#include <mutex>
#include "ipc.hpp"
#include "util/sleeper_thread.hpp"
namespace waybar::modules::sway {
@ -28,6 +29,7 @@ class Ipc {
void sendCmd(uint32_t type, const std::string &payload = "");
void subscribe(const std::string &payload);
void handleEvent();
void setWorker(std::function<void()> &&func);
protected:
static inline const std::string ipc_magic_ = "i3-ipc";
@ -41,6 +43,7 @@ class Ipc {
int fd_;
int fd_event_;
std::mutex mutex_;
util::SleeperThread thread_;
};
} // namespace waybar::modules::sway

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@ -6,7 +6,6 @@
#include "client.hpp"
#include "modules/sway/ipc/client.hpp"
#include "util/json.hpp"
#include "util/sleeper_thread.hpp"
namespace waybar::modules::sway {
@ -18,13 +17,10 @@ class Mode : public ALabel, public sigc::trackable {
private:
void onEvent(const struct Ipc::ipc_response&);
void worker();
std::string mode_;
util::JsonParser parser_;
std::mutex mutex_;
util::SleeperThread thread_;
Ipc ipc_;
};

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@ -7,7 +7,6 @@
#include "client.hpp"
#include "modules/sway/ipc/client.hpp"
#include "util/json.hpp"
#include "util/sleeper_thread.hpp"
namespace waybar::modules::sway {
@ -20,7 +19,6 @@ class Window : public ALabel, public sigc::trackable {
private:
void onEvent(const struct Ipc::ipc_response&);
void onCmd(const struct Ipc::ipc_response&);
void worker();
std::tuple<std::size_t, int, std::string, std::string> getFocusedNode(const Json::Value& nodes,
std::string& output);
void getTree();
@ -33,8 +31,6 @@ class Window : public ALabel, public sigc::trackable {
std::size_t app_nb_;
util::JsonParser parser_;
std::mutex mutex_;
util::SleeperThread thread_;
Ipc ipc_;
};

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@ -8,7 +8,6 @@
#include "client.hpp"
#include "modules/sway/ipc/client.hpp"
#include "util/json.hpp"
#include "util/sleeper_thread.hpp"
namespace waybar::modules::sway {
@ -21,7 +20,6 @@ class Workspaces : public AModule, public sigc::trackable {
private:
void onCmd(const struct Ipc::ipc_response&);
void onEvent(const struct Ipc::ipc_response&);
void worker();
bool filterButtons();
Gtk::Button& addButton(const Json::Value&);
void onButtonReady(const Json::Value&, Gtk::Button&);
@ -38,8 +36,6 @@ class Workspaces : public AModule, public sigc::trackable {
util::JsonParser parser_;
std::unordered_map<std::string, Gtk::Button> buttons_;
std::mutex mutex_;
util::SleeperThread thread_;
Ipc ipc_;
};

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@ -10,19 +10,23 @@ Ipc::Ipc() {
}
Ipc::~Ipc() {
thread_.stop();
if (fd_ > 0) {
// To fail the IPC header
write(fd_, "close-sway-ipc", 14);
write(fd_event_, "close-sway-ipc", 14);
if (fd_ > 0) {
close(fd_);
fd_ = -1;
}
if (fd_event_ > 0) {
write(fd_event_, "close-sway-ipc", 14);
close(fd_event_);
fd_event_ = -1;
}
}
void Ipc::setWorker(std::function<void()>&& func) { thread_ = func; }
const std::string Ipc::getSocketPath() const {
const char* env = getenv("SWAYSOCK");
if (env != nullptr) {

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@ -8,7 +8,13 @@ Mode::Mode(const std::string& id, const Json::Value& config)
ipc_.subscribe(R"(["mode"])");
ipc_.signal_event.connect(sigc::mem_fun(*this, &Mode::onEvent));
// Launch worker
worker();
ipc_.setWorker([this] {
try {
ipc_.handleEvent();
} catch (const std::exception& e) {
spdlog::error("Mode: {}", e.what());
}
});
dp.emit();
}
@ -31,16 +37,6 @@ void Mode::onEvent(const struct Ipc::ipc_response& res) {
}
}
void Mode::worker() {
thread_ = [this] {
try {
ipc_.handleEvent();
} catch (const std::exception& e) {
spdlog::error("Mode: {}", e.what());
}
};
}
auto Mode::update() -> void {
if (mode_.empty()) {
event_box_.hide();

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@ -11,7 +11,13 @@ Window::Window(const std::string& id, const Bar& bar, const Json::Value& config)
// Get Initial focused window
getTree();
// Launch worker
worker();
ipc_.setWorker([this] {
try {
ipc_.handleEvent();
} catch (const std::exception& e) {
spdlog::error("Window: {}", e.what());
}
});
}
void Window::onEvent(const struct Ipc::ipc_response& res) { getTree(); }
@ -28,16 +34,6 @@ void Window::onCmd(const struct Ipc::ipc_response& res) {
}
}
void Window::worker() {
thread_ = [this] {
try {
ipc_.handleEvent();
} catch (const std::exception& e) {
spdlog::error("Window: {}", e.what());
}
};
}
auto Window::update() -> void {
if (!old_app_id_.empty()) {
bar_.window.get_style_context()->remove_class(old_app_id_);

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@ -22,7 +22,13 @@ Workspaces::Workspaces(const std::string &id, const Bar &bar, const Json::Value
window.signal_scroll_event().connect(sigc::mem_fun(*this, &Workspaces::handleScroll));
}
// Launch worker
worker();
ipc_.setWorker([this] {
try {
ipc_.handleEvent();
} catch (const std::exception &e) {
spdlog::error("Workspaces: {}", e.what());
}
});
}
void Workspaces::onEvent(const struct Ipc::ipc_response &res) {
@ -102,16 +108,6 @@ void Workspaces::onCmd(const struct Ipc::ipc_response &res) {
}
}
void Workspaces::worker() {
thread_ = [this] {
try {
ipc_.handleEvent();
} catch (const std::exception &e) {
spdlog::error("Workspaces: {}", e.what());
}
};
}
bool Workspaces::filterButtons() {
bool needReorder = false;
for (auto it = buttons_.begin(); it != buttons_.end();) {