226824 2021-06-09 09:17:28 -0700 [GTK] Unitialized memory read from NativeWebWheelEvent 2021-06-09 09:17:28 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build PC Linux NEW P2 Normal --- 1 mcatanzaro webkit-unassigned bugs-noreply oldest_to_newest 1768201 0 mcatanzaro 2021-06-09 09:17:28 -0700 ==793346== Syscall param sendmsg(msg.msg_iov[1]) points to uninitialised byte(s) ==793346== at 0x5990ACD: sendmsg (in /usr/lib64/libc-2.33.so) ==793346== by 0x6AA9F03: IPC::Connection::sendOutputMessage(IPC::UnixMessage&) (ConnectionUnix.cpp:536) ==793346== by 0x6AABE99: IPC::Connection::sendOutgoingMessage(WTF::UniqueRef<IPC::Encoder>&&) (ConnectionUnix.cpp:454) ==793346== by 0x6A99047: IPC::Connection::sendOutgoingMessages() [clone .part.0] (Connection.cpp:932) ==793346== by 0xA940735: operator() (Function.h:82) ==793346== by 0xA940735: WTF::RunLoop::performWork() (RunLoop.cpp:133) ==793346== by 0xA995928: operator() (RunLoopGLib.cpp:80) ==793346== by 0xA995928: WTF::RunLoop::RunLoop()::{lambda(void*)#1}::_FUN(void*) (RunLoopGLib.cpp:82) ==793346== by 0xA99625E: operator() (RunLoopGLib.cpp:53) ==793346== by 0xA99625E: WTF::RunLoop::{lambda(_GSource*, int (*)(void*), void*)#1}::_FUN(_GSource*, int (*)(void*), void*) (RunLoopGLib.cpp:56) ==793346== by 0x55FAE37: g_main_dispatch (gmain.c:3344) ==793346== by 0x55FBD8A: g_main_context_dispatch (gmain.c:4062) ==793346== by 0x55FBF76: g_main_context_iterate (gmain.c:4138) ==793346== by 0x55FC413: g_main_loop_run (gmain.c:4336) ==793346== by 0xA99637F: WTF::RunLoop::run() (RunLoopGLib.cpp:108) ==793346== Address 0xf86453a is 74 bytes inside a block of size 576 alloc'd ==793346== at 0x484086F: malloc (vg_replace_malloc.c:380) ==793346== by 0xA99C33A: bmalloc::DebugHeap::malloc(unsigned long, bmalloc::FailureAction) (DebugHeap.cpp:98) ==793346== by 0x6B3F26B: operator new (Encoder.h:44) ==793346== by 0x6B3F26B: WTF::UniqueRef<IPC::Encoder> WTF::makeUniqueRefWithoutFastMallocCheck<IPC::Encoder, IPC::MessageName, unsigned long&>(IPC::MessageName&&, unsigned long&) [clone .isra.0] (UniqueRef.h:38) ==793346== by 0x6B475C2: makeUniqueRef<IPC::Encoder, IPC::MessageName, long unsigned int&> (UniqueRef.h:45) ==793346== by 0x6B475C2: send<Messages::EventDispatcher::WheelEvent> (MessageSender.h:47) ==793346== by 0x6B475C2: WebKit::WebPageProxy::sendWheelEvent(WebKit::WebWheelEvent const&) (WebPageProxy.cpp:2848) ==793346== by 0x6B50767: WebKit::WebPageProxy::handleWheelEvent(WebKit::NativeWebWheelEvent const&) (WebPageProxy.cpp:2814) ==793346== by 0x6C44B79: webkitWebViewBaseHandleWheelEvent (WebKitWebViewBase.cpp:1283) ==793346== by 0x6C44B79: webkitWebViewBaseScrollEvent(_GtkWidget*, _GdkEventScroll*) (WebKitWebViewBase.cpp:1317) ==793346== by 0x4A5DA3E: _gtk_marshal_BOOLEAN__BOXEDv (gtkmarshalers.c:130) ==793346== by 0x554AF45: g_type_class_meta_marshalv (gclosure.c:1034) ==793346== by 0x554AA98: _g_closure_invoke_va (gclosure.c:873) ==793346== by 0x55684F7: g_signal_emit_valist (gsignal.c:3406) ==793346== by 0x5569789: g_signal_emit (gsignal.c:3553) ==793346== by 0x4E3CFFE: gtk_widget_event_internal (gtkwidget.c:7808) ==793346== Uninitialised value was created by a stack allocation ==793346== at 0x6B0A7D0: WebKit::NativeWebWheelEvent::NativeWebWheelEvent(WebKit::NativeWebWheelEvent const&) (NativeWebWheelEventGtk.cpp:57) Unfortunately I don't see where it's coming from.