[Webkit-unassigned] [Bug 154888] New: Plugin process crash in WebKit::NetscapePlugin::fromNPP

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=154888

            Bug ID: 154888
           Summary: Plugin process crash in
                    WebKit::NetscapePlugin::fromNPP
    Classification: Unclassified
           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

Another crash with the GNOME Shell (3.18.3) browser plugin. Full backtrace downstream.

Version-Release number of selected component:
webkitgtk4-2.10.4-1.fc23

Additional info:
reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        /usr/libexec/webkit2gtk-4.0/WebKitPluginProcess 27 /usr/lib64/mozilla/plugins/libgnome-shell-browser-plugin.so
crash_function: WebKit::NetscapePlugin::fromNPP
executable:     /usr/libexec/webkit2gtk-4.0/WebKitPluginProcess
global_pid:     3702
kernel:         4.2.6-301.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 WebKit::NetscapePlugin::fromNPP at /usr/src/debug/webkitgtk-2.10.4/Source/WebKit2/WebProcess/Plugins/Netscape/NetscapePlugin.cpp:120
 #1 WebKit::NPN_InvokeDefault at /usr/src/debug/webkitgtk-2.10.4/Source/WebKit2/WebProcess/Plugins/Netscape/NetscapeBrowserFuncs.cpp:699
 #2 on_shell_appeared at browser-plugin.c:214
 #3 do_call at gdbusnamewatching.c:216
 #4 call_appeared_handler at gdbusnamewatching.c:228
 #5 on_name_owner_changed at gdbusnamewatching.c:315
 #6 emit_signal_instance_in_idle_cb at gdbusconnection.c:3701
 #11 WTF::RunLoop::run at /usr/src/debug/webkitgtk-2.10.4/Source/WTF/wtf/glib/RunLoopGLib.cpp:67
 #12 WebKit::ChildProcessMain<WebKit::PluginProcess, WebKit::PluginProcessMain> at /usr/src/debug/webkitgtk-2.10.4/Source/WebKit2/Shared/unix/ChildProcessMain.h:61
 #14 _start

Another user with a slightly-different backtrace sasy:

"I don't exactly know what happened, but I was using epiphany running with x11 GDK backend in a gnome+wayland session. I opened several tabs on extensions.gnome.org and tried to install extensions."

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