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Exit early on invalid process type flag (see #3824)

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This avoids crashes later during Chromium initialization.
This commit is contained in:
Marshall Greenblatt
2025-05-20 11:38:53 -04:00
parent ce365d4987
commit 9a115ea48f
3 changed files with 23 additions and 5 deletions
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16
libcef_dll/bootstrap/bootstrap_win.cc
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@@ -13,6 +13,7 @@
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "cef/include/cef_sandbox_win.h"
#include "cef/include/internal/cef_types.h"
#include "cef/libcef/browser/preferred_stack_size_win.inc"
#include "cef/libcef_dll/bootstrap/bootstrap_util_win.h"
#include "cef/libcef_dll/bootstrap/certificate_util_win.h"
@@ -89,10 +90,17 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
const base::CommandLine command_line =
base::CommandLine::FromString(::GetCommandLineW());
constexpr char kProcessType[] = "type";
const bool is_subprocess = command_line.HasSwitch(kProcessType);
if (is_subprocess && command_line.GetSwitchValueASCII(kProcessType).empty()) {
// Early exit on invalid process type.
return CEF_RESULT_CODE_BAD_PROCESS_TYPE;
}
// True if this is a sandboxed sub-process. Uses similar logic to
// Sandbox::IsProcessSandboxed.
const bool is_sandboxed =
command_line.HasSwitch("type") &&
is_subprocess &&
base::GetCurrentProcessIntegrityLevel() < base::MEDIUM_INTEGRITY;
std::wstring dll_name;
@@ -124,7 +132,7 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
if (bootstrap_util::IsDefaultExeName(dll_name)) {
ShowError(LoadString(IDS_ERROR_NO_MODULE_NAME));
return 1;
return CEF_RESULT_CODE_KILLED;
}
certificate_util::GetClientThumbprints(
@@ -137,7 +145,7 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
{base::WideToUTF16(exe_path.BaseName().value()),
base::WideToUTF16(exe_thumbprints.errors)});
ShowError(FormatErrorString(IDS_ERROR_INVALID_CERT, subst));
return 1;
return CEF_RESULT_CODE_KILLED;
}
}
@@ -212,5 +220,5 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
ShowError(error);
}
return 1;
return CEF_RESULT_CODE_KILLED;
}