kernel32: Add a workaround for broken apps that pass negative values to ReadConsole.

dlls/kernel32/console.c

@@ -34,6 +34,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
+#include <limits.h>
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
 #endif
@@ -1614,9 +1615,10 @@ BOOL WINAPI ReadConsoleA(HANDLE hConsoleInput, LPVOID lpBuffer, DWORD nNumberOfC
     }
 
     if ((ret = ReadConsoleW(hConsoleInput, ptr, nNumberOfCharsToRead, &ncr, NULL)))
+    {
         ncr = WideCharToMultiByte(GetConsoleCP(), 0, ptr, ncr, lpBuffer, nNumberOfCharsToRead, NULL, NULL);
-
-    if (lpNumberOfCharsRead) *lpNumberOfCharsRead = ncr;
+        if (lpNumberOfCharsRead) *lpNumberOfCharsRead = ncr;
+    }
     HeapFree(GetProcessHeap(), 0, ptr);
 
     return ret;
@@ -1637,6 +1639,12 @@ BOOL WINAPI ReadConsoleW(HANDLE hConsoleInput, LPVOID lpBuffer,
     TRACE("(%p,%p,%d,%p,%p)\n",
 	  hConsoleInput, lpBuffer, nNumberOfCharsToRead, lpNumberOfCharsRead, lpReserved);
 
+    if (nNumberOfCharsToRead > INT_MAX)
+    {
+        SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+        return FALSE;
+    }
+
     if (!GetConsoleMode(hConsoleInput, &mode))
         return FALSE;
     if ((fd = get_console_bare_fd(hConsoleInput)) != -1)

dlls/kernel32/tests/console.c

@@ -2566,8 +2566,6 @@ static void test_ReadConsole(void)
     ok(ret == INVALID_FILE_SIZE, "expected INVALID_FILE_SIZE, got %#x\n", ret);
     ok(GetLastError() == ERROR_INVALID_HANDLE, "expected ERROR_INVALID_HANDLE, got %d\n", GetLastError());
 
-if (0) /* FIXME: uncomment once Wine doesn't hang forever */
-{
     bytes = 0xdeadbeef;
     SetLastError(0xdeadbeef);
     ret = ReadFile(std_input, buf, -128, &bytes, NULL);
@@ -2580,18 +2578,14 @@ if (0) /* FIXME: uncomment once Wine doesn't hang forever */
     ret = ReadConsoleA(std_input, buf, -128, &bytes, NULL);
     ok(!ret, "expected 0, got %u\n", ret);
     ok(GetLastError() == ERROR_NOT_ENOUGH_MEMORY, "expected ERROR_NOT_ENOUGH_MEMORY, got %d\n", GetLastError());
-    ok(bytes == 0xdeadbeef, "expected 0xdeadbeef, %#x\n", bytes);
-}
+    ok(bytes == 0xdeadbeef, "expected 0xdeadbeef, got %#x\n", bytes);
 
-if (0) /* FIXME: uncomment once Wine doesn't hang forever */
-{
     bytes = 0xdeadbeef;
     SetLastError(0xdeadbeef);
     ret = ReadConsoleW(std_input, buf, -128, &bytes, NULL);
     ok(!ret, "expected 0, got %u\n", ret);
     ok(GetLastError() == ERROR_NOT_ENOUGH_MEMORY, "expected ERROR_NOT_ENOUGH_MEMORY, got %d\n", GetLastError());
-    ok(bytes == 0xdeadbeef, "expected 0xdeadbeef, %#x\n", bytes);
-}
+    ok(bytes == 0xdeadbeef, "expected 0xdeadbeef, got %#x\n", bytes);
 }
 
 START_TEST(console)