content/common/sandbox_linux/bpf_renderer_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_renderer_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 RendererProcessPolicy::RendererProcessPolicy() {}
  25 RendererProcessPolicy::~RendererProcessPolicy() {}
  26
  27 ResultExpr RendererProcessPolicy::EvaluateSyscall(int sysno) const {
  28   switch (sysno) {
  29     // The baseline policy allows __NR_clock_gettime. Allow
  30     // clock_getres() for V8. crbug.com/329053.
  31     case __NR_clock_getres:
  32       return sandbox::RestrictClockID();
  33     case __NR_ioctl:
  34       return sandbox::RestrictIoctl();
  35     // Allow the system calls below.
  36     case __NR_fdatasync:
  37     case __NR_fsync:
  38 #if defined(__i386__) || defined(__x86_64__) || defined(__mips__)
  39     case __NR_getrlimit:
  40 #endif
  41 #if defined(__i386__) || defined(__arm__)
  42     case __NR_ugetrlimit:
  43 #endif
  44     case __NR_mremap:  // See crbug.com/149834.
  45     case __NR_pread64:
  46     case __NR_pwrite64:
  47     case __NR_sched_get_priority_max:
  48     case __NR_sched_get_priority_min:
  49     case __NR_sysinfo:
  50     case __NR_times:
  51     case __NR_uname:
  52       return Allow();
  53     case __NR_sched_getaffinity:
  54     case __NR_sched_getparam:
  55     case __NR_sched_getscheduler:
  56     case __NR_sched_setscheduler:
  57       return sandbox::RestrictSchedTarget(GetPolicyPid(), sysno);
  58     case __NR_prlimit64:
  59       return Error(EPERM);  // See crbug.com/160157.
  60     default:
  61       // Default on the content baseline policy.
  62       return SandboxBPFBasePolicy::EvaluateSyscall(sysno);
  63   }
  64 }
  65
  66 }  // namespace content