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Check the length of LOCALAPPDATA in the setup before appending to it.

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
chrg6
2026-11-09 05:57:22 -05:00
parent 7ee5ce195e
commit fc747b0eba
1 changed files with 3 additions and 1 deletions
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4
launcher/native/setup.c
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@@ -373,7 +373,9 @@ int WINAPI wWinMain(HINSTANCE inst, HINSTANCE prev, PWSTR cmdline, int show)
if (!S.dest[0]) {
wchar_t base[PATHN];
if (!known_folder(&FOLDERID_UserProgramFiles, base, PATHN)) {
if (!GetEnvironmentVariableW(L"LOCALAPPDATA", base, PATHN)) return 1;
// 0 when unset; PATHN or more when it does not fit (base is then left unwritten); room for \Programs
DWORD got = GetEnvironmentVariableW(L"LOCALAPPDATA", base, PATHN);
if (!got || got >= PATHN - 16) return 1;
wcscat(base, L"\\Programs");
}
swprintf(S.dest, PATHN, L"%ls\\%ls", base, APP_NAME);