[v4 PATCH] comctl32/tooltip: Protect TTM_ADDTOOLW from invalid text pointers
Alistair Leslie-Hughes
leslie_alistair at hotmail.com
Tue Feb 23 01:16:48 CST 2016
Fixes https://bugs.winehq.org/show_bug.cgi?id=10347
Signed-off-by: Alistair Leslie-Hughes <leslie_alistair at hotmail.com>
---
dlls/comctl32/tests/tooltips.c | 27 +++++++++++++++++++++++++++
dlls/comctl32/tooltips.c | 3 +++
2 files changed, 30 insertions(+)
diff --git a/dlls/comctl32/tests/tooltips.c b/dlls/comctl32/tests/tooltips.c
index 3382fce..2a0f855 100644
--- a/dlls/comctl32/tests/tooltips.c
+++ b/dlls/comctl32/tests/tooltips.c
@@ -446,6 +446,33 @@ static void test_gettext(void)
r = SendMessageW(hwnd, TTM_ADDTOOLW, 0, (LPARAM)&toolinfoW);
ok(!r, "Adding the tool to the tooltip succeeded!\n");
+ /* lpszText with an invalid address */
+ toolinfoW.cbSize = sizeof(TTTOOLINFOW);
+ toolinfoW.hwnd = notify;
+ toolinfoW.hinst = GetModuleHandleA(NULL);
+ toolinfoW.uFlags = 0;
+ toolinfoW.uId = 0;
+ toolinfoW.lpszText = (LPWSTR)0xdeadbeef;
+ toolinfoW.lParam = 0;
+ GetClientRect(hwnd, &toolinfoW.rect);
+ r = SendMessageA(hwnd, TTM_ADDTOOLW, 0, (LPARAM)&toolinfoW);
+ ok(!r, "Adding the tool to the tooltip succeeded!\n");
+
+ /* lpszText with an invalid address. Crashes using TTTOOLINFOA message */
+ if(0)
+ {
+ toolinfoA.cbSize = sizeof(TTTOOLINFOA);
+ toolinfoA.hwnd = notify;
+ toolinfoA.hinst = GetModuleHandleA(NULL);
+ toolinfoA.uFlags = 0;
+ toolinfoA.uId = 0;
+ toolinfoA.lpszText = (LPSTR)0xdeadbeef;
+ toolinfoA.lParam = 0;
+ GetClientRect(hwnd, &toolinfoA.rect);
+ r = SendMessageA(hwnd, TTM_ADDTOOLA, 0, (LPARAM)&toolinfoA);
+ ok(!r, "Adding the tool to the tooltip succeeded!\n");
+ }
+
if (0) /* crashes on NT4 */
{
toolinfoW.hwnd = NULL;
diff --git a/dlls/comctl32/tooltips.c b/dlls/comctl32/tooltips.c
index 8bf6919..92f121c 100644
--- a/dlls/comctl32/tooltips.c
+++ b/dlls/comctl32/tooltips.c
@@ -1041,6 +1041,9 @@ TOOLTIPS_AddToolT (TOOLTIPS_INFO *infoPtr, const TTTOOLINFOW *ti, BOOL isW)
if (ti->cbSize >= TTTOOLINFOW_V2_SIZE && !ti->lpszText && isW)
return FALSE;
+ if(isW && ti->lpszText && IsBadReadPtr(ti->lpszText, sizeof(WCHAR)))
+ return FALSE;
+
if (infoPtr->uNumTools == 0) {
infoPtr->tools = Alloc (sizeof(TTTOOL_INFO));
toolPtr = infoPtr->tools;
--
1.9.1
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