Jacek Caban : wininet: Fixed handing NULL buffer in InternetReadFileExW.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: f70c9ae8d147ac2f4377dae1f90eacf18d05df91
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=f70c9ae8d147ac2f4377dae1f90eacf18d05df91

Author: Jacek Caban <jacek at codeweavers.com>
Date:   Mon May 16 22:42:19 2016 +0200

wininet: Fixed handing NULL buffer in InternetReadFileExW.

Signed-off-by: Jacek Caban <jacek at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/wininet/internet.c   | 2 +-
 dlls/wininet/tests/http.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/wininet/internet.c b/dlls/wininet/internet.c
index 5359794..e192592 100644
--- a/dlls/wininet/internet.c
+++ b/dlls/wininet/internet.c
@@ -2280,7 +2280,7 @@ BOOL WINAPI InternetReadFileExW(HINTERNET hFile, LPINTERNET_BUFFERSW lpBuffer,
 
     TRACE("(%p %p 0x%x 0x%lx)\n", hFile, lpBuffer, dwFlags, dwContext);
 
-    if (lpBuffer->dwStructSize != sizeof(*lpBuffer)) {
+    if (!lpBuffer || lpBuffer->dwStructSize != sizeof(*lpBuffer)) {
         SetLastError(ERROR_INVALID_PARAMETER);
         return FALSE;
     }
diff --git a/dlls/wininet/tests/http.c b/dlls/wininet/tests/http.c
index b4cad7d..78cec50 100644
--- a/dlls/wininet/tests/http.c
+++ b/dlls/wininet/tests/http.c
@@ -1067,6 +1067,11 @@ static void InternetReadFileExA_test(int flags)
     CLEAR_NOTIFIED(INTERNET_STATUS_CONNECTING_TO_SERVER);
     CLEAR_NOTIFIED(INTERNET_STATUS_CONNECTED_TO_SERVER);
 
+    rc = InternetReadFileExW(hor, NULL, 0, 0xdeadcafe);
+    ok(!rc && (GetLastError() == ERROR_INVALID_PARAMETER),
+        "InternetReadFileEx should have failed with ERROR_INVALID_PARAMETER instead of %s, %u\n",
+        rc ? "TRUE" : "FALSE", GetLastError());
+
     /* tests invalid dwStructSize */
     inetbuffers.dwStructSize = sizeof(inetbuffers)+1;
     inetbuffers.lpcszHeader = NULL;