[Webkit-unassigned] [Bug 176304] New: [GTK] Plugin process crash in WebKit::PluginDestructionProtector::PluginDestructionProtector

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=176304

            Bug ID: 176304
           Summary: [GTK] Plugin process crash in
                    WebKit::PluginDestructionProtector::PluginDestructionP
                    rotector
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com
                CC: bugs-noreply at webkitgtk.org

I have seven reports of this plugin process crash in WebKit::PluginDestructionProtector::PluginDestructionProtector. Problem is that pluginController is unexpectedly null:

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 WebKit::PluginController::PluginDestructionProtector::PluginDestructionProtector at /usr/src/debug/webkitgtk-2.16.3/Source/WebKit2/WebProcess/Plugins/PluginController.h:165
 #1 std::make_unique<WebKit::PluginController::PluginDestructionProtector, WebKit::PluginController*>(WebKit::PluginController*&&) at /usr/include/c++/6.3.1/bits/unique_ptr.h:791
 #2 WebKit::PluginDestructionProtector::PluginDestructionProtector at /usr/src/debug/webkitgtk-2.16.3/Source/WebKit2/WebProcess/Plugins/Netscape/NetscapeBrowserFuncs.cpp:62
 #3 WebKit::NPN_InvokeDefault at /usr/src/debug/webkitgtk-2.16.3/Source/WebKit2/WebProcess/Plugins/Netscape/NetscapeBrowserFuncs.cpp:687
 #4 install_extension_cb at browser-plugin.c:478
 #5 g_task_return_now at gtask.c:1121
 #6 g_task_return at gtask.c:1179
 #7 reply_cb at gdbusproxy.c:2583
 #8 g_task_return_now at gtask.c:1121
 #9 g_task_return at gtask.c:1179

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