Jacek Caban : console: Don't allow blocking read ioctls on screen buffer object.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d3f09b862a3f6b19bbfeba7183c2ced06c030f72
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=d3f09b862a3f6b19bbfeba718...

Author: Jacek Caban 
Date:   Wed Oct 14 19:57:51 2020 +0200

console: Don't allow blocking read ioctls on screen buffer object.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49997
Signed-off-by: Jacek Caban 
Signed-off-by: Alexandre Julliard

---

dlls/kernel32/tests/console.c | 18 ++++++++++++++++++
 server/console.c              |  3 ++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/dlls/kernel32/tests/console.c b/dlls/kernel32/tests/console.c
index da62fd3eb2..ddd5bfcb4c 100644
--- a/dlls/kernel32/tests/console.c
+++ b/dlls/kernel32/tests/console.c
@@ -2981,6 +2981,7 @@ static void test_ReadConsole(HANDLE input)
 {
     DWORD ret, bytes;
     char buf[1024];
+    HANDLE output;

SetLastError(0xdeadbeef);
     ret = GetFileSize(input, NULL);
@@ -3015,6 +3016,23 @@ static void test_ReadConsole(HANDLE input)
        GetLastError() == ERROR_NOACCESS, /* Win 8, 10 */
        "expected ERROR_NOT_ENOUGH_MEMORY, got %d\n", GetLastError());
     ok(bytes == 0xdeadbeef, "expected 0xdeadbeef, got %#x\n", bytes);
+
+    output = CreateFileA("CONOUT$", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0);
+    ok(output != INVALID_HANDLE_VALUE, "Could not open console\n");
+
+    ret = ReadConsoleW(output, buf, sizeof(buf) / sizeof(WCHAR), &bytes, NULL);
+    ok(!ret && GetLastError() == ERROR_INVALID_HANDLE,
+       "ReadConsoleW returned %x(%u)\n", ret, GetLastError());
+
+    ret = ReadConsoleA(output, buf, sizeof(buf), &bytes, NULL);
+    ok(!ret && GetLastError() == ERROR_INVALID_HANDLE,
+       "ReadConsoleA returned %x(%u)\n", ret, GetLastError());
+
+    ret = ReadFile(output, buf, sizeof(buf), &bytes, NULL);
+    ok(!ret && GetLastError() == ERROR_INVALID_HANDLE,
+       "ReadFile returned %x(%u)\n", ret, GetLastError());
+
+    CloseHandle(output);
 }

static void test_GetCurrentConsoleFont(HANDLE std_output)
diff --git a/server/console.c b/server/console.c
index 184d98d166..8ac3a08abc 100644
--- a/server/console.c
+++ b/server/console.c
@@ -848,7 +848,8 @@ static int screen_buffer_ioctl( struct fd *fd, ioctl_code_t code, struct async *
         return 1;

default:
-        if (!screen_buffer->input || !screen_buffer->input->server || code >> 16 != FILE_DEVICE_CONSOLE)
+        if (!screen_buffer->input || !screen_buffer->input->server || code >> 16 != FILE_DEVICE_CONSOLE ||
+            is_blocking_read_ioctl( code ))
         {
             set_error( STATUS_INVALID_HANDLE );
             return 0;