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      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/seccomp-bpf-helpers/syscall_parameters_restrictions.h"
     13 #include "sandbox/linux/seccomp-bpf-helpers/syscall_sets.h"
     14 #include "sandbox/linux/services/linux_syscalls.h"
     15 
     16 using sandbox::SyscallSets;
     17 using sandbox::bpf_dsl::Allow;
     18 using sandbox::bpf_dsl::Error;
     19 using sandbox::bpf_dsl::ResultExpr;
     20 
     21 namespace content {
     22 
     23 PpapiProcessPolicy::PpapiProcessPolicy() {}
     24 PpapiProcessPolicy::~PpapiProcessPolicy() {}
     25 
     26 ResultExpr PpapiProcessPolicy::EvaluateSyscall(int sysno) const {
     27   switch (sysno) {
     28     // TODO(jln): restrict prctl.
     29     case __NR_prctl:
     30     case __NR_pread64:
     31     case __NR_pwrite64:
     32     case __NR_sched_get_priority_max:
     33     case __NR_sched_get_priority_min:
     34     case __NR_sched_getaffinity:
     35     case __NR_sched_getparam:
     36     case __NR_sched_getscheduler:
     37     case __NR_sched_setscheduler:
     38     case __NR_times:
     39       return Allow();
     40     case __NR_ioctl:
     41       return Error(ENOTTY);  // Flash Access.
     42     default:
     43       // Default on the baseline policy.
     44       return SandboxBPFBasePolicy::EvaluateSyscall(sysno);
     45   }
     46 }
     47 
     48 }  // namespace content
     49