[reactos] 01/01: [SHELL32] Make Recycle Bin PIDL data handling more robust (#7328)

[Whindmar Saksit]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=abf3bde91b1f76f571423…

commit abf3bde91b1f76f571423ea2c0bf6decea8abb15
Author:     Whindmar Saksit <whindsaks(a)proton.me>
AuthorDate: Fri Oct 11 23:47:06 2024 +0200
Commit:     GitHub <noreply(a)github.com>
CommitDate: Fri Oct 11 23:47:06 2024 +0200

    [SHELL32] Make Recycle Bin PIDL data handling more robust (#7328)
---
 dll/win32/shell32/folders/CRecycleBin.cpp | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/dll/win32/shell32/folders/CRecycleBin.cpp
b/dll/win32/shell32/folders/CRecycleBin.cpp
index 7bcfe96391e..32f51b3ba8a 100644
--- a/dll/win32/shell32/folders/CRecycleBin.cpp
+++ b/dll/win32/shell32/folders/CRecycleBin.cpp
@@ -750,15 +750,20 @@ HRESULT WINAPI CRecycleBin::GetDetailsOf(PCUITEMID_CHILD pidl, UINT
iColumn, LPS
     TRACE("(%p, %p, %d, %p)\n", this, pidl, iColumn, pDetails);
     if (iColumn >= COLUMNS_COUNT)
         return E_FAIL;
-    pDetails->fmt = RecycleBinColumns[iColumn].fmt;
-    pDetails->cxChar = RecycleBinColumns[iColumn].cxChars;
+
     if (pidl == NULL)
+    {
+        pDetails->fmt = RecycleBinColumns[iColumn].fmt;
+        pDetails->cxChar = RecycleBinColumns[iColumn].cxChars;
         return SHSetStrRet(&pDetails->str,
RecycleBinColumns[iColumn].column_name_id);
+    }
 
     if (iColumn == COLUMN_NAME)
         return GetDisplayNameOf(pidl, SHGDN_NORMAL, &pDetails->str);
 
     pFileDetails = _ILGetRecycleStruct(pidl);
+    if (!pFileDetails && FAILED_UNEXPECTEDLY(E_INVALIDARG))
+        return E_INVALIDARG;
     switch (iColumn)
     {
         case COLUMN_DATEDEL:
@@ -766,8 +771,16 @@ HRESULT WINAPI CRecycleBin::GetDetailsOf(PCUITEMID_CHILD pidl, UINT
iColumn, LPS
             break;
         case COLUMN_DELFROM:
             pszBackslash = wcsrchr(pFileDetails->szName, L'\\');
-            Length = (pszBackslash - pFileDetails->szName);
-            memcpy((LPVOID)buffer, pFileDetails->szName, Length * sizeof(WCHAR));
+            if (!pszBackslash)
+            {
+                ERR("Filename '%ls' not a valid path?\n",
pFileDetails->szName);
+                Length = 0;
+            }
+            else
+            {
+                Length = (pszBackslash - pFileDetails->szName);
+                memcpy((LPVOID)buffer, pFileDetails->szName, Length * sizeof(WCHAR));
+            }
             buffer[Length] = UNICODE_NULL;
             if (buffer[0] && buffer[1] == L':' && !buffer[2])
             {