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Avoid list corruption when linking window with HWND_BOTTOM (thanks to

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Gerard Patel).
This commit is contained in:
Alexandre Julliard 2001-09-24 01:13:48 +00:00
parent 551586e91b
commit 5af055d8df
1 changed files with 13 additions and 8 deletions
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21
server/window.c
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@ -174,15 +174,20 @@ DECL_HANDLER(link_window)
if (req->parent && !(parent = get_window( req->parent ))) return;
if (parent && req->previous)
{
if (req->previous == 1) /* special case: HWND_BOTTOM */
previous = parent->last_child;
else
if (!(previous = get_window( req->previous ))) return;
if (previous && previous->parent != parent) /* previous must be a child of parent */
if (req->previous == (user_handle_t)1) /* special case: HWND_BOTTOM */
{
set_error( STATUS_INVALID_PARAMETER );
return;
previous = parent->last_child;
if (previous == win) return; /* nothing to do */
}
else
{
if (!(previous = get_window( req->previous ))) return;
/* previous must be a child of parent, and not win itself */
if (previous->parent != parent || previous == win)
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
}
}
link_window( win, parent, previous );