Linux sandbox: Restrict sched_* syscalls on the GPU and ppapi processes.

content/common/sandbox_linux/bpf_ppapi_policy_linux.cc

 // Copyright 2013 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_ppapi_policy_linux.h"
 
 #include <errno.h>
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
@@ skipping 13 matching lines @@
 PpapiProcessPolicy::~PpapiProcessPolicy() {}
 
 ResultExpr PpapiProcessPolicy::EvaluateSyscall(int sysno) const {
   switch (sysno) {
     // TODO(jln): restrict prctl.
     case __NR_prctl:
     case __NR_pread64:
     case __NR_pwrite64:
     case __NR_sched_get_priority_max:
     case __NR_sched_get_priority_min:
+    case __NR_times:
+      return Allow();
     case __NR_sched_getaffinity:
     case __NR_sched_getparam:
     case __NR_sched_getscheduler:
     case __NR_sched_setscheduler:
-    case __NR_times:
-      return Allow();
+      return sandbox::RestrictSchedTarget(GetPolicyPid(), sysno);
     case __NR_ioctl:
       return Error(ENOTTY);  // Flash Access.
     default:
       // Default on the baseline policy.
       return SandboxBPFBasePolicy::EvaluateSyscall(sysno);
   }
 }
 
 }  // namespace content