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WindowServer: Remove applets from AppletManager on client disconnection

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Disconnecting from WindowServer without explicit calls to DestroyWindow
would leave nulled-out WeakPtr's in the AppletManager applet list.

This led to a null dereference when adding a new applet, since we were
assuming the list contained no nulled-out applets.

This patch fixes the issue by always unregistering applet windows from
the AppletManager in ~ClientConnection(). We also do an extra pass of
pruning any nulled-out WeakPtrs from the applet list when adding to it.

Fixes #1551.
This commit is contained in:
Andreas Kling 2020-03-31 13:52:35 +02:00
parent c54855682c
commit c56c8c8953
2 changed files with 9 additions and 1 deletions
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5
Servers/WindowServer/ClientConnection.cpp
View file

@ -81,8 +81,11 @@ ClientConnection::~ClientConnection()
{
MenuManager::the().close_all_menus_from_client({}, *this);
auto windows = move(m_windows);
for (auto& window : windows)
for (auto& window : windows) {
window.value->detach_client({});
if (window.value->type() == WindowType::MenuApplet)
AppletManager::the().remove_applet(window.value);
}
}
void ClientConnection::die()