mirror of https://github.com/electron/electron
96 lines
4.4 KiB
Diff
96 lines
4.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Jeremy Apthorp <nornagon@nornagon.net>
|
|
Date: Wed, 28 Nov 2018 13:20:27 -0800
|
|
Subject: support_mixed_sandbox_with_zygote.patch
|
|
|
|
On Linux, Chromium launches all new renderer processes via a "zygote"
|
|
process which has the sandbox pre-initialized (see
|
|
//docs/linux_zygote.md). In order to support mixed-sandbox mode, in
|
|
which some renderers are launched with the sandbox engaged and others
|
|
without it, we need the option to launch non-sandboxed renderers without
|
|
going through the zygote.
|
|
|
|
Chromium already supports a `--no-zygote` flag, but it turns off the
|
|
zygote completely, and thus also disables sandboxing. This patch allows
|
|
the `--no-zygote` flag to affect renderer processes on a case-by-case
|
|
basis, checking immediately prior to launch whether to go through the
|
|
zygote or not based on the command-line of the to-be-launched renderer.
|
|
|
|
This patch could conceivably be upstreamed, as it does not affect
|
|
production Chromium (which does not use the `--no-zygote` flag).
|
|
However, the patch would need to be reviewed by the security team, as it
|
|
does touch a security-sensitive class.
|
|
|
|
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
|
|
index 336cebf1aee3659f881b8edb8b9370860520c9bd..f3c54b254acc4dc9b6b2c67c57c164236a89294e 100644
|
|
--- a/content/browser/renderer_host/render_process_host_impl.cc
|
|
+++ b/content/browser/renderer_host/render_process_host_impl.cc
|
|
@@ -1725,9 +1725,15 @@ bool RenderProcessHostImpl::Init() {
|
|
std::unique_ptr<SandboxedProcessLauncherDelegate> sandbox_delegate =
|
|
std::make_unique<RendererSandboxedProcessLauncherDelegateWin>(
|
|
*cmd_line, IsPdf(), /*is_jit_disabled=*/IsPdf());
|
|
+#else
|
|
+#if BUILDFLAG(USE_ZYGOTE)
|
|
+ bool use_zygote = !cmd_line->HasSwitch(switches::kNoZygote);
|
|
+ std::unique_ptr<SandboxedProcessLauncherDelegate> sandbox_delegate =
|
|
+ std::make_unique<RendererSandboxedProcessLauncherDelegate>(use_zygote);
|
|
#else
|
|
std::unique_ptr<SandboxedProcessLauncherDelegate> sandbox_delegate =
|
|
std::make_unique<RendererSandboxedProcessLauncherDelegate>();
|
|
+#endif
|
|
#endif
|
|
|
|
auto file_data = std::make_unique<ChildProcessLauncherFileData>();
|
|
diff --git a/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.cc b/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.cc
|
|
index dce5ba05c3ba1d476e1dfecb27942fd5e913ff88..f77ac77e9942a567a47c229838150385975f0756 100644
|
|
--- a/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.cc
|
|
+++ b/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.cc
|
|
@@ -35,6 +35,9 @@ namespace content {
|
|
|
|
#if BUILDFLAG(USE_ZYGOTE)
|
|
ZygoteCommunication* RendererSandboxedProcessLauncherDelegate::GetZygote() {
|
|
+ if (!use_zygote_) {
|
|
+ return nullptr;
|
|
+ }
|
|
const base::CommandLine& browser_command_line =
|
|
*base::CommandLine::ForCurrentProcess();
|
|
base::CommandLine::StringType renderer_prefix =
|
|
@@ -69,6 +72,9 @@ RendererSandboxedProcessLauncherDelegateWin::
|
|
is_pdf_renderer_(is_pdf_renderer) {
|
|
// PDF renderers must be jitless.
|
|
CHECK(!is_pdf_renderer || is_jit_disabled);
|
|
+#if BUILDFLAG(USE_ZYGOTE)
|
|
+ use_zygote_ = !cmd_line->HasSwitch(switches::kNoZygote);
|
|
+#endif
|
|
if (is_jit_disabled) {
|
|
dynamic_code_can_be_disabled_ = true;
|
|
return;
|
|
diff --git a/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.h b/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.h
|
|
index 00038da2c15696b361aea1469ccf73307e44963e..7ccfbf11ecfd56fd165915baa85919eaf2e923b9 100644
|
|
--- a/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.h
|
|
+++ b/content/browser/renderer_host/renderer_sandboxed_process_launcher_delegate.h
|
|
@@ -18,6 +18,11 @@ class CONTENT_EXPORT RendererSandboxedProcessLauncherDelegate
|
|
public:
|
|
RendererSandboxedProcessLauncherDelegate() = default;
|
|
|
|
+#if BUILDFLAG(USE_ZYGOTE)
|
|
+ RendererSandboxedProcessLauncherDelegate(bool use_zygote):
|
|
+ use_zygote_(use_zygote) {}
|
|
+#endif
|
|
+
|
|
~RendererSandboxedProcessLauncherDelegate() override = default;
|
|
|
|
#if BUILDFLAG(USE_ZYGOTE)
|
|
@@ -30,6 +35,11 @@ class CONTENT_EXPORT RendererSandboxedProcessLauncherDelegate
|
|
|
|
// sandbox::policy::SandboxDelegate:
|
|
sandbox::mojom::Sandbox GetSandboxType() override;
|
|
+
|
|
+ private:
|
|
+#if BUILDFLAG(USE_ZYGOTE)
|
|
+ bool use_zygote_ = true;
|
|
+#endif
|
|
};
|
|
|
|
#if BUILDFLAG(IS_WIN)
|