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/seccomp-bpf-helpers/syscall_parameters_restrictions.h"
  13 #include "sandbox/linux/seccomp-bpf-helpers/syscall_sets.h"
  14 #include "sandbox/linux/seccomp-bpf/sandbox_bpf_policy.h"
  15 #include "sandbox/linux/services/linux_syscalls.h"
  16
  17 using sandbox::SyscallSets;
  18
  19 namespace content {
  20
  21 RendererProcessPolicy::RendererProcessPolicy() {}
  22 RendererProcessPolicy::~RendererProcessPolicy() {}
  23
  24 ErrorCode RendererProcessPolicy::EvaluateSyscall(SandboxBPF* sandbox,
  25                                                  int sysno) const {
  26   switch (sysno) {
  27     case __NR_ioctl:
  28       return sandbox::RestrictIoctl(sandbox);
  29     // Allow the system calls below.
  30     // The baseline policy allows __NR_clock_gettime. Allow
  31     // clock_getres() for V8. crbug.com/329053.
  32     case __NR_clock_getres:
  33     case __NR_fdatasync:
  34     case __NR_fsync:
  35     case __NR_getpriority:
  36 #if defined(__i386__) || defined(__x86_64__)
  37     case __NR_getrlimit:
  38 #endif
  39 #if defined(__i386__) || defined(__arm__)
  40     case __NR_ugetrlimit:
  41 #endif
  42     case __NR_mremap:  // See crbug.com/149834.
  43     case __NR_pread64:
  44     case __NR_pwrite64:
  45     case __NR_sched_getaffinity:
  46     case __NR_sched_get_priority_max:
  47     case __NR_sched_get_priority_min:
  48     case __NR_sched_getparam:
  49     case __NR_sched_getscheduler:
  50     case __NR_sched_setscheduler:
  51     case __NR_setpriority:
  52     case __NR_sysinfo:
  53     case __NR_times:
  54     case __NR_uname:
  55       return ErrorCode(ErrorCode::ERR_ALLOWED);
  56     case __NR_prlimit64:
  57       return ErrorCode(EPERM);  // See crbug.com/160157.
  58     default:
  59       // Default on the content baseline policy.
  60       return SandboxBPFBasePolicy::EvaluateSyscall(sandbox, sysno);
  61   }
  62 }
  63
  64 }  // namespace content