[Webkit-unassigned] [Bug 146729] New: [GTK] Syscall param sendmsg(msg.msg_iov[0]) points to uninitialised byte(s) in IPC::Connection::sendOutgoingMessage

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146729

            Bug ID: 146729
           Summary: [GTK] Syscall param sendmsg(msg.msg_iov[0]) points to
                    uninitialised byte(s) in
                    IPC::Connection::sendOutgoingMessage
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com

I see some bad complaints from valgrind when starting Epiphany:

==18581== Thread 11:
==18581== Syscall param sendmsg(msg.msg_iov[0]) points to uninitialised byte(s)
==18581==    at 0xCA98A9D: ??? (syscall-template.S:81)
==18581==    by 0x68D50FB: IPC::Connection::sendOutgoingMessage(std::unique_ptr<IPC::MessageEncoder, std::default_delete<IPC::MessageEncoder> >) (ConnectionUnix.cpp:525)
==18581==    by 0x673FA2E: IPC::Connection::sendOutgoingMessages() (Connection.cpp:786)
==18581==    by 0x8AB9E14: UnknownInlinedFun (functional:2271)
==18581==    by 0x8AB9E14: WTF::GMainLoopSource::voidCallback() (GMainLoopSource.cpp:365)
==18581==    by 0x8AB6019: WTF::GMainLoopSource::voidSourceCallback(WTF::GMainLoopSource*) (GMainLoopSource.cpp:456)
==18581==    by 0xBF09A89: g_main_dispatch (gmain.c:3122)
==18581==    by 0xBF09A89: g_main_context_dispatch (gmain.c:3737)
==18581==    by 0xBF09E1F: g_main_context_iterate.isra.29 (gmain.c:3808)
==18581==    by 0xBF0A141: g_main_loop_run (gmain.c:4002)
==18581==    by 0x8A95F24: operator() (functional:2271)
==18581==    by 0x8A95F24: WTF::threadEntryPoint(void*) (Threading.cpp:58)
==18581==    by 0x8AB2C79: WTF::wtfThreadEntryPoint(void*) (ThreadingPthreads.cpp:170)
==18581==    by 0xCA90554: start_thread (pthread_create.c:333)
==18581==    by 0xCDA6F3C: clone (clone.S:109)
==18581==  Address 0x2def28e1 is on thread 11's stack
==18581==  in frame #1, created by IPC::Connection::sendOutgoingMessage(std::unique_ptr<IPC::MessageEncoder, std::default_delete<IPC::MessageEncoder> >) (ConnectionUnix.cpp:422)
==18581== 
==18581== Thread 12:
==18581== Syscall param sendmsg(msg.msg_iov[1]) points to uninitialised byte(s)
==18581==    at 0xCA98A9D: ??? (syscall-template.S:81)
==18581==    by 0x68D50FB: IPC::Connection::sendOutgoingMessage(std::unique_ptr<IPC::MessageEncoder, std::default_delete<IPC::MessageEncoder> >) (ConnectionUnix.cpp:525)
==18581==    by 0x673FA2E: IPC::Connection::sendOutgoingMessages() (Connection.cpp:786)
==18581==    by 0x8AB9E14: UnknownInlinedFun (functional:2271)
==18581==    by 0x8AB9E14: WTF::GMainLoopSource::voidCallback() (GMainLoopSource.cpp:365)
==18581==    by 0x8AB6019: WTF::GMainLoopSource::voidSourceCallback(WTF::GMainLoopSource*) (GMainLoopSource.cpp:456)
==18581==    by 0xBF09A89: g_main_dispatch (gmain.c:3122)
==18581==    by 0xBF09A89: g_main_context_dispatch (gmain.c:3737)
==18581==    by 0xBF09E1F: g_main_context_iterate.isra.29 (gmain.c:3808)
==18581==    by 0xBF0A141: g_main_loop_run (gmain.c:4002)
==18581==    by 0x8A95F24: operator() (functional:2271)
==18581==    by 0x8A95F24: WTF::threadEntryPoint(void*) (Threading.cpp:58)
==18581==    by 0x8AB2C79: WTF::wtfThreadEntryPoint(void*) (ThreadingPthreads.cpp:170)
==18581==    by 0xCA90554: start_thread (pthread_create.c:333)
==18581==    by 0xCDA6F3C: clone (clone.S:109)
==18581==  Address 0x2601ac54 is not stack'd, malloc'd or (recently) free'd

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