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_clone:
  28       return sandbox::RestrictCloneToThreadsAndEPERMFork(sandbox);
  29     case __NR_ioctl:
  30       return sandbox::RestrictIoctl(sandbox);
  31     case __NR_prctl:
  32       return sandbox::RestrictPrctl(sandbox);
  33     // Allow the system calls below.
  34     // The baseline policy allows __NR_clock_gettime. Allow
  35     // clock_getres() for V8. crbug.com/329053.
  36     case __NR_clock_getres:
  37     case __NR_fdatasync:
  38     case __NR_fsync:
  39     case __NR_getpriority:
  40 #if defined(__i386__) || defined(__x86_64__)
  41     case __NR_getrlimit:
  42 #endif
  43 #if defined(__i386__) || defined(__arm__)
  44     case __NR_ugetrlimit:
  45 #endif
  46     case __NR_mremap:  // See crbug.com/149834.
  47     case __NR_pread64:
  48     case __NR_pwrite64:
  49     case __NR_sched_getaffinity:
  50     case __NR_sched_get_priority_max:
  51     case __NR_sched_get_priority_min:
  52     case __NR_sched_getparam:
  53     case __NR_sched_getscheduler:
  54     case __NR_sched_setscheduler:
  55     case __NR_setpriority:
  56     case __NR_sysinfo:
  57     case __NR_times:
  58     case __NR_uname:
  59       return ErrorCode(ErrorCode::ERR_ALLOWED);
  60     case __NR_prlimit64:
  61       return ErrorCode(EPERM);  // See crbug.com/160157.
  62     default:
  63       // Default on the content baseline policy.
  64       return SandboxBPFBasePolicy::EvaluateSyscall(sandbox, sysno);
  65   }
  66 }
  67
  68 }  // namespace content