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[core] fix 'Bad label' errors with empty labels

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* Only happens on Win7 due to MinGW not automatically initializing variables to zero on that platform.
* Root of the problem was that GetWindowTextU() did not properly handle empty text controls, due to
  GetWindowTextW() returning 0 on empty strings. As a result, the UTF-8 label was not properly set to
  the empty string, but kept whatever data it contained, which is garbage on Windows 7 and resulted in
  an invalid label (even after sanitizing, since we don't sanitize low-level ASCII characters).
* Closes #1352
This commit is contained in:
Pete Batard 2019-08-01 18:07:44 +01:00
parent c8fda3e4e8
commit 307e2f7075
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GPG key ID: 38E0CF5E69EDD671
2 changed files with 8 additions and 5 deletions
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3
src/msapi_utf8.h
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@ -329,6 +329,9 @@ static __inline int GetWindowTextU(HWND hWnd, char* lpString, int nMaxCount)
{ {
int ret = 0; int ret = 0;
DWORD err = ERROR_INVALID_DATA; DWORD err = ERROR_INVALID_DATA;
// Handle the empty string as GetWindowTextW() returns 0 then
if ((lpString != NULL) && (nMaxCount > 0))
lpString[0] = 0;
// coverity[returned_null] // coverity[returned_null]
walloc(lpString, nMaxCount); walloc(lpString, nMaxCount);
ret = GetWindowTextW(hWnd, wlpString, nMaxCount); ret = GetWindowTextW(hWnd, wlpString, nMaxCount);

10
src/rufus.rc
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@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDD_DIALOG DIALOGEX 12, 12, 232, 326 IDD_DIALOG DIALOGEX 12, 12, 232, 326
STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_ACCEPTFILES EXSTYLE WS_EX_ACCEPTFILES
CAPTION "Rufus 3.7.1553" CAPTION "Rufus 3.7.1554"
FONT 9, "Segoe UI Symbol", 400, 0, 0x0 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
BEGIN BEGIN
LTEXT "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP LTEXT "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@ -394,8 +394,8 @@ END
// //
VS_VERSION_INFO VERSIONINFO VS_VERSION_INFO VERSIONINFO
FILEVERSION 3,7,1553,0 FILEVERSION 3,7,1554,0
PRODUCTVERSION 3,7,1553,0 PRODUCTVERSION 3,7,1554,0
FILEFLAGSMASK 0x3fL FILEFLAGSMASK 0x3fL
#ifdef _DEBUG #ifdef _DEBUG
FILEFLAGS 0x1L FILEFLAGS 0x1L
@ -413,13 +413,13 @@ BEGIN
VALUE "Comments", "https://akeo.ie" VALUE "Comments", "https://akeo.ie"
VALUE "CompanyName", "Akeo Consulting" VALUE "CompanyName", "Akeo Consulting"
VALUE "FileDescription", "Rufus" VALUE "FileDescription", "Rufus"
VALUE "FileVersion", "3.7.1553" VALUE "FileVersion", "3.7.1554"
VALUE "InternalName", "Rufus" VALUE "InternalName", "Rufus"
VALUE "LegalCopyright", "© 2011-2019 Pete Batard (GPL v3)" VALUE "LegalCopyright", "© 2011-2019 Pete Batard (GPL v3)"
VALUE "LegalTrademarks", "https://www.gnu.org/copyleft/gpl.html" VALUE "LegalTrademarks", "https://www.gnu.org/copyleft/gpl.html"
VALUE "OriginalFilename", "rufus-3.7.exe" VALUE "OriginalFilename", "rufus-3.7.exe"
VALUE "ProductName", "Rufus" VALUE "ProductName", "Rufus"
VALUE "ProductVersion", "3.7.1553" VALUE "ProductVersion", "3.7.1554"
END END
END END
BLOCK "VarFileInfo" BLOCK "VarFileInfo"