Module: wine Branch: master Commit: 35c8f15bc67f7602438fe0c39a69ff6ddf6b8297 URL: https://gitlab.winehq.org/wine/wine/-/commit/35c8f15bc67f7602438fe0c39a69ff6...
Author: Fabian Maurer dark.shadow4@web.de Date: Mon Jun 12 22:02:45 2023 +0200
user32: Ignore invalid parameters in DrawTextEx when HDC is invalid.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47089 Signed-off-by: Fabian Maurer dark.shadow4@web.de
---
dlls/user32/tests/text.c | 32 ++++++++++++++++++++++++++++++++ dlls/user32/text.c | 21 ++++++++++++++++----- 2 files changed, 48 insertions(+), 5 deletions(-)
diff --git a/dlls/user32/tests/text.c b/dlls/user32/tests/text.c index 317fb9a6a29..90fe7421b02 100644 --- a/dlls/user32/tests/text.c +++ b/dlls/user32/tests/text.c @@ -519,6 +519,38 @@ static void test_DrawTextCalcRect(void) ok(textheight==0,"Got textheight from DrawTextExW\n"); ok(dtp.uiLengthDrawn==1337, "invalid dtp.uiLengthDrawn = %i\n",dtp.uiLengthDrawn); } + + /* When passing invalid DC, other parameters must be ignored - no crashes on invalid pointers */ + SetLastError(0xdeadbeef); + textheight = DrawTextExW((HDC)0xdeadbeef, emptystringW, 100000, (LPRECT)0xdeadbeef, 0, 0); + ok(textheight == 0, "Got textheight from DrawTextExW\n"); + ok(GetLastError() == 0xdeadbeef,"Got error %lu\n", GetLastError()); + + SetLastError(0xdeadbeef); + textheight = DrawTextExW((HDC)0xdeadbeef, (LPWSTR)0xdeadbeef, 100000, &rect, 0, 0); + ok(textheight == 0, "Got textheight from DrawTextExW\n"); + ok(GetLastError() == 0xdeadbeef,"Got error %lu\n", GetLastError()); + + SetLastError(0xdeadbeef); + textheight = DrawTextExW((HDC)0xdeadbeef, 0, -1, (LPRECT)0xdeadbeef, DT_CALCRECT, 0); + ok(textheight == 0, "Got textheight from DrawTextExW\n"); + ok(GetLastError() == 0xdeadbeef,"Got error %lu\n", GetLastError()); + + SetLastError(0xdeadbeef); + textheight = DrawTextExA((HDC)0xdeadbeef, emptystring, 100000, (LPRECT)0xdeadbeef, 0, 0); + ok(textheight == 0, "Got textheight from DrawTextExA\n"); + ok(GetLastError() == ERROR_INVALID_PARAMETER || GetLastError() == ERROR_INVALID_HANDLE,"Got error %lu\n", GetLastError()); + + SetLastError(0xdeadbeef); + textheight = DrawTextExA((HDC)0xdeadbeef, 0, -1, (LPRECT)0xdeadbeef, DT_CALCRECT, 0); + ok(textheight == 0, "Got textheight from DrawTextExA\n"); + ok(GetLastError() == ERROR_INVALID_PARAMETER || GetLastError() == ERROR_INVALID_HANDLE,"Got error %lu\n", GetLastError()); + + if (0) + { + /* Crashes */ + textheight = DrawTextExA((HDC)0xdeadbeef, (LPSTR)0xdeadbeef, 100, &rect, 0, 0); + } }
/* More test cases from bug 12226 */ diff --git a/dlls/user32/text.c b/dlls/user32/text.c index 86946e6a53a..788ed10269c 100644 --- a/dlls/user32/text.c +++ b/dlls/user32/text.c @@ -874,8 +874,7 @@ INT WINAPI DrawTextExW( HDC hdc, LPWSTR str, INT i_count, int len, lh, count=i_count; TEXTMETRICW tm; int lmargin = 0, rmargin = 0; - int x = rect->left, y = rect->top; - int width = rect->right - rect->left; + int x, y, width; int max_width = 0; int last_line; int tabwidth /* to keep gcc happy */ = 0; @@ -897,7 +896,13 @@ INT WINAPI DrawTextExW( HDC hdc, LPWSTR str, INT i_count, if (flags & DT_SINGLELINE) flags &= ~DT_WORDBREAK;
- GetTextMetricsW(hdc, &tm); + if (!GetTextMetricsW(hdc, &tm)) + return 0; + + x = rect->left; + y = rect->top; + width = rect->right - rect->left; + if (flags & DT_EXTERNALLEADING) lh = tm.tmHeight + tm.tmExternalLeading; else @@ -1086,18 +1091,24 @@ INT WINAPI DrawTextExA( HDC hdc, LPSTR str, INT count, DWORD wmax; DWORD amax; UINT cp; + TEXTMETRICA tm; + + if (!GetTextMetricsA(hdc, &tm)) + { + SetLastError(ERROR_INVALID_HANDLE); + return 0; + }
if (!count) return 0; if (!str && count > 0) return 0; if( !str || ((count == -1) && !(count = strlen(str)))) { int lh; - TEXTMETRICA tm;
if (dtp && dtp->cbSize != sizeof(DRAWTEXTPARAMS)) return 0;
- GetTextMetricsA(hdc, &tm); + if (flags & DT_EXTERNALLEADING) lh = tm.tmHeight + tm.tmExternalLeading; else