Paul Gofman : ws2_32: Copy send buffer data for async send in WS2_ConnectEx().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 904f7cfbae6542e9d0b3e00cc65427f8979b1770
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=904f7cfbae6542e9d0b3e00cc...

Author: Paul Gofman <pgofman(a)codeweavers.com>
Date:   Wed Mar 24 18:51:13 2021 +0100

ws2_32: Copy send buffer data for async send in WS2_ConnectEx().

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50738
Signed-off-by: Paul Gofman <pgofman(a)codeweavers.com>
Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/ws2_32/socket.c     | 11 +++++++++--
 dlls/ws2_32/tests/sock.c |  1 +
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c
index 28b14e71c9c..715c96097fc 100644
--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -3447,14 +3447,18 @@ static BOOL WINAPI WS2_ConnectEx(SOCKET s, const struct WS_sockaddr* name, int n
     else if (ret == WSAEINPROGRESS)
     {
         struct ws2_async *wsa;
+        DWORD size;
+
         ULONG_PTR cvalue = (((ULONG_PTR)ov->hEvent & 1) == 0) ? (ULONG_PTR)ov : 0;
 
         _enable_event(SOCKET2HANDLE(s), FD_CONNECT|FD_READ|FD_WRITE,
                       FD_CONNECT,
                       FD_WINE_CONNECTED|FD_WINE_LISTENING);
 
+        size = offsetof( struct ws2_async, iovec[1] ) + sendBufLen;
+
         /* Indirectly call WSASend */
-        if (!(wsa = (struct ws2_async *)alloc_async_io( offsetof( struct ws2_async, iovec[1] ), WS2_async_send )))
+        if (!(wsa = (struct ws2_async *)alloc_async_io( size, WS2_async_send )))
         {
             SetLastError(WSAEFAULT);
         }
@@ -3473,9 +3477,12 @@ static BOOL WINAPI WS2_ConnectEx(SOCKET s, const struct WS_sockaddr* name, int n
             wsa->n_iovecs    = sendBuf ? 1 : 0;
             wsa->first_iovec = 0;
             wsa->completion_func = NULL;
-            wsa->iovec[0].iov_base = sendBuf;
+            wsa->iovec[0].iov_base = &wsa->iovec[1];
             wsa->iovec[0].iov_len  = sendBufLen;
 
+            if (sendBufLen)
+                memcpy( wsa->iovec[0].iov_base, sendBuf, sendBufLen );
+
             status = register_async( ASYNC_TYPE_WRITE, wsa->hSocket, &wsa->io, ov->hEvent,
                                       NULL, (void *)cvalue, iosb );
             if (status != STATUS_PENDING) HeapFree(GetProcessHeap(), 0, wsa);
diff --git a/dlls/ws2_32/tests/sock.c b/dlls/ws2_32/tests/sock.c
index cab25baf1d1..cedbf423d97 100644
--- a/dlls/ws2_32/tests/sock.c
+++ b/dlls/ws2_32/tests/sock.c
@@ -7296,6 +7296,7 @@ static void test_ConnectEx(void)
     buffer[1] = '2';
     buffer[2] = '3';
     bret = pConnectEx(connector, (struct sockaddr*)&address, addrlen, buffer, 3, &bytesReturned, &overlapped);
+    memset(buffer, 0, 3);
     ok(bret == FALSE && WSAGetLastError() == ERROR_IO_PENDING, "ConnectEx failed: "
         "returned %d + errno %d\n", bret, WSAGetLastError());
     dwret = WaitForSingleObject(overlapped.hEvent, 15000);