Apply renderer sandbox to utility processes.

content/common/sandbox_linux/bpf_utility_policy_linux.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/common/sandbox_linux/bpf_renderer_policy_linux.h"
+#include "content/common/sandbox_linux/bpf_utility_policy_linux.h"
 
 #include <errno.h>
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "content/common/sandbox_linux/sandbox_linux.h"
 #include "sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h"
 #include "sandbox/linux/seccomp-bpf-helpers/syscall_sets.h"
 #include "sandbox/linux/seccomp-bpf/sandbox_bpf_policy.h"
 #include "sandbox/linux/services/linux_syscalls.h"
 
 using sandbox::SyscallSets;
 
 namespace content {
 
-RendererProcessPolicy::RendererProcessPolicy() {}
-RendererProcessPolicy::~RendererProcessPolicy() {}
+UtilityProcessPolicy::UtilityProcessPolicy() {
+}
+UtilityProcessPolicy::~UtilityProcessPolicy() {
+}
 
-ErrorCode RendererProcessPolicy::EvaluateSyscall(SandboxBPF* sandbox,
-                                                 int sysno) const {
+ErrorCode UtilityProcessPolicy::EvaluateSyscall(SandboxBPF* sandbox,
+                                                int sysno) const {
+  // TODO(mdempsky): See if we can limit these further.

[jln (very slow on Chromium), 2014/06/25 00:28:08]

Let's mention explicitly that this is a fork of the renderer policy.

[mdempsky, 2014/06/25 00:43:30]

Done.

   switch (sysno) {
     case __NR_ioctl:
       return sandbox::RestrictIoctl(sandbox);
     // Allow the system calls below.
     // The baseline policy allows __NR_clock_gettime. Allow
     // clock_getres() for V8. crbug.com/329053.

[jln (very slow on Chromium), 2014/06/25 00:28:08]

FYI: All the exceptions that have been added late with pointers to specific bugs
are almost certainly not needed.

[mdempsky, 2014/06/25 00:43:30]

Yep, was planning on tackling that in a followup.  I've explicitly mentioned
that in the above comment to make sure I don't forget though. :)

     case __NR_clock_getres:
     case __NR_fdatasync:
     case __NR_fsync:
     case __NR_getpriority:
 #if defined(__i386__) || defined(__x86_64__)
     case __NR_getrlimit:
 #endif
 #if defined(__i386__) || defined(__arm__)
     case __NR_ugetrlimit:
 #endif
@@ skipping 13 matching lines @@
       return ErrorCode(ErrorCode::ERR_ALLOWED);
     case __NR_prlimit64:
       return ErrorCode(EPERM);  // See crbug.com/160157.
     default:
       // Default on the content baseline policy.
       return SandboxBPFBasePolicy::EvaluateSyscall(sandbox, sysno);
   }
 }
 
 }  // namespace content