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