[PATCH v5 0/1] MR5727: riched20: In EM_SETPARAFORMAT protect against out of bound cTabStop values

[Fabian Maurer (＠DarkShadow44)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56730

--
  v5: riched20: In para_set_fmt protect against out of bound cTabStop values

https://gitlab.winehq.org/wine/wine/-/merge_requests/5727

[PATCH v5 1/1] riched20: In para_set_fmt protect against out of bound cTabStop values

[Fabian Maurer]

From: Fabian Maurer

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56730
---
 dlls/riched20/para.c         |  5 +++--
 dlls/riched20/tests/editor.c | 29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/dlls/riched20/para.c b/dlls/riched20/para.c
index a380f45e556..2c9e2892189 100644
--- a/dlls/riched20/para.c
+++ b/dlls/riched20/para.c
@@ -486,8 +486,9 @@ static BOOL para_set_fmt( ME_TextEditor *editor, ME_Paragraph *para, const PARAF
   COPY_FIELD(PFM_ALIGNMENT, wAlignment);
   if (dwMask & PFM_TABSTOPS)
   {
-    para->fmt.cTabCount = pFmt->cTabCount;
-    memcpy(para->fmt.rgxTabs, pFmt->rgxTabs, pFmt->cTabCount*sizeof(LONG));
+    /* Clamp between 0 and MAX_TAB_STOPS */
+    para->fmt.cTabCount = max(0, min(pFmt->cTabCount, MAX_TAB_STOPS));
+    memcpy(para->fmt.rgxTabs, pFmt->rgxTabs, para->fmt.cTabCount * sizeof(LONG));
   }

#define EFFECTS_MASK (PFM_RTLPARA|PFM_KEEP|PFM_KEEPNEXT|PFM_PAGEBREAKBEFORE| \
diff --git a/dlls/riched20/tests/editor.c b/dlls/riched20/tests/editor.c
index f8abb7a3e65..19cd40aea48 100644
--- a/dlls/riched20/tests/editor.c
+++ b/dlls/riched20/tests/editor.c
@@ -8802,6 +8802,35 @@ static void test_alignment_style(void)
         SendMessageW(richedit, EM_GETPARAFORMAT, 0, (LPARAM)&pf);
         ok(pf.wAlignment == align_mask[i], "got %d expect %ld\n", pf.wAlignment, align_mask[i]);

+        /* Test out of bounds tab count */
+        pf.dwMask = PFM_TABSTOPS;
+        pf.cTabCount = -25000;
+        SendMessageW(richedit, EM_SETPARAFORMAT, 0, (LPARAM)&pf);
+        ok(pf.cTabCount == -25000, "Got %d\n", pf.cTabCount);
+        SendMessageW(richedit, EM_GETPARAFORMAT, 0, (LPARAM)&pf);
+        ok(pf.cTabCount == 0, "Got %d\n", pf.cTabCount);
+        pf.dwMask = PFM_TABSTOPS;
+        pf.cTabCount = 25000;
+        SendMessageW(richedit, EM_SETPARAFORMAT, 0, (LPARAM)&pf);
+        ok(pf.cTabCount == 25000, "Got %d\n", pf.cTabCount);
+        SendMessageW(richedit, EM_GETPARAFORMAT, 0, (LPARAM)&pf);
+        ok(pf.cTabCount == 32, "Got %d\n", pf.cTabCount);
+        pf.dwMask = PFM_TABSTOPS;
+        pf.cTabCount = 32;
+        SendMessageW(richedit, EM_SETPARAFORMAT, 0, (LPARAM)&pf);
+        SendMessageW(richedit, EM_GETPARAFORMAT, 0, (LPARAM)&pf);
+        ok(pf.cTabCount == 32, "Got %d\n", pf.cTabCount);
+        pf.dwMask = PFM_TABSTOPS;
+        pf.cTabCount = 33;
+        SendMessageW(richedit, EM_SETPARAFORMAT, 0, (LPARAM)&pf);
+        SendMessageW(richedit, EM_GETPARAFORMAT, 0, (LPARAM)&pf);
+        ok(pf.cTabCount == 32, "Got %d\n", pf.cTabCount);
+        pf.dwMask = PFM_TABSTOPS;
+        pf.cTabCount = 1;
+        SendMessageW(richedit, EM_SETPARAFORMAT, 0, (LPARAM)&pf);
+        SendMessageW(richedit, EM_GETPARAFORMAT, 0, (LPARAM)&pf);
+        ok(pf.cTabCount == 1, "Got %d\n", pf.cTabCount);
+
         DestroyWindow(richedit);
     }

[PATCH v5 1/1] riched20: In para_set_fmt protect against out of bound cTabStop values

[Marvin]

Hi,

It looks like your patch introduced the new failures shown below.
Please investigate and fix them before resubmitting your patch.
If they are not new, fixing them anyway would help a lot. Otherwise
please ask for the known failures list to be updated.

The tests also ran into some preexisting test failures. If you know how
to fix them that would be helpful. See the TestBot job for the details:

The full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=145878

Your paranoid android.

=== debian11b (64 bit WoW report) ===

user32:
input.c:4067: Test succeeded inside todo block: button_down_hwnd_todo 1: got MSG_TEST_WIN hwnd 00000000011900EC, msg WM_LBUTTONDOWN, wparam 0x1, lparam 0x320032

[PATCH v5 0/1] MR5727: riched20: In EM_SETPARAFORMAT protect against out of bound cTabStop values - approved

[Huw Davies (＠huw)]

This merge request was approved by Huw Davies.