content/common/sandbox_linux/bpf_ppapi_policy_linux.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/common/sandbox_linux/bpf_ppapi_policy_linux.h"
   6
   7 #include <errno.h>
   8
   9 #include "base/basictypes.h"
  10 #include "build/build_config.h"
  11 #include "content/common/sandbox_linux/sandbox_linux.h"
  12 #include "sandbox/linux/bpf_dsl/bpf_dsl.h"
  13 #include "sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h"
  14 #include "sandbox/linux/seccomp-bpf-helpers/syscall_sets.h"
  15 #include "sandbox/linux/system_headers/linux_syscalls.h"
  16
  17 using sandbox::SyscallSets;
  18 using sandbox::bpf_dsl::Allow;
  19 using sandbox::bpf_dsl::Error;
  20 using sandbox::bpf_dsl::ResultExpr;
  21
  22 namespace content {
  23
  24 PpapiProcessPolicy::PpapiProcessPolicy() {}
  25 PpapiProcessPolicy::~PpapiProcessPolicy() {}
  26
  27 ResultExpr PpapiProcessPolicy::EvaluateSyscall(int sysno) const {
  28   switch (sysno) {
  29     // TODO(jln): restrict prctl.
  30     case __NR_prctl:
  31     case __NR_pread64:
  32     case __NR_pwrite64:
  33     case __NR_sched_get_priority_max:
  34     case __NR_sched_get_priority_min:
  35     case __NR_times:
  36       return Allow();
  37     case __NR_sched_getaffinity:
  38     case __NR_sched_getparam:
  39     case __NR_sched_getscheduler:
  40     case __NR_sched_setscheduler:
  41       return sandbox::RestrictSchedTarget(GetPolicyPid(), sysno);
  42     case __NR_ioctl:
  43       return Error(ENOTTY);  // Flash Access.
  44     default:
  45       // Default on the baseline policy.
  46       return SandboxBPFBasePolicy::EvaluateSyscall(sysno);
  47   }
  48 }
  49
  50 }  // namespace content