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comctl32/toolbar: Protect from NULL pointer access in TB_GETBUTTONINFOW handler. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2017-01-11 15:31:42 +03:00 committed by Alexandre Julliard
parent 904c695de8
commit 26067cc0b9
2 changed files with 11 additions and 2 deletions
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11
dlls/comctl32/tests/toolbar.c
View File

@ -1710,12 +1710,13 @@ static void test_recalc(void)
static void test_getbuttoninfo(void)
{
HWND hToolbar = NULL;
TBBUTTONINFOW tbiW;
TBBUTTONINFOA tbi;
int i;
rebuild_toolbar_with_buttons(&hToolbar);
for (i = 0; i < 128; i++)
{
TBBUTTONINFOA tbi;
int ret;
tbi.cbSize = i;
@ -1727,6 +1728,14 @@ static void test_getbuttoninfo(void)
compare(ret, -1, "%d");
}
}
/* TBIF_TEXT with NULL pszText */
memset(&tbiW, 0, sizeof(tbiW));
tbiW.cbSize = sizeof(tbiW);
tbiW.dwMask = TBIF_BYINDEX | TBIF_STYLE | TBIF_COMMAND | TBIF_TEXT;
i = SendMessageA(hToolbar, TB_GETBUTTONINFOW, 1, (LPARAM)&tbiW);
ok(i == 1, "Got index %d\n", i);
DestroyWindow(hToolbar);
}

2
dlls/comctl32/toolbar.c
View File

@ -3397,7 +3397,7 @@ TOOLBAR_GetButtonInfoT(const TOOLBAR_INFO *infoPtr, INT Id, LPTBBUTTONINFOW lpTb
Str_GetPtrW(lpText, lpTbInfo->pszText, lpTbInfo->cchText);
else
Str_GetPtrWtoA(lpText, (LPSTR)lpTbInfo->pszText, lpTbInfo->cchText);
} else
} else if (!bUnicode || lpTbInfo->pszText)
lpTbInfo->pszText[0] = '\0';
}
return nIndex;