blob: b9f0aa7aad57b9843279e202aca0a3cc096a8d58 [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sandbox/policy/linux/bpf_utility_policy_linux.h"
#include <errno.h>
#include "build/build_config.h"
#include "sandbox/linux/bpf_dsl/bpf_dsl.h"
#include "sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h"
#include "sandbox/linux/seccomp-bpf-helpers/syscall_sets.h"
#include "sandbox/linux/system_headers/linux_syscalls.h"
#include "sandbox/policy/linux/sandbox_linux.h"
using sandbox::bpf_dsl::Allow;
using sandbox::bpf_dsl::Error;
using sandbox::bpf_dsl::ResultExpr;
namespace sandbox {
namespace policy {
UtilityProcessPolicy::UtilityProcessPolicy() {}
UtilityProcessPolicy::~UtilityProcessPolicy() {}
ResultExpr UtilityProcessPolicy::EvaluateSyscall(int sysno) const {
switch (sysno) {
case __NR_ioctl:
return RestrictIoctl();
case __NR_prlimit64:
// Restrict prlimit() to reference only the calling process.
return RestrictPrlimitToGetrlimit(GetPolicyPid());
// Some third party libraries seem to call sched_getaffinity(). There's not
// much reason to block the syscall.
case __NR_sched_getaffinity:
return RestrictSchedTarget(GetPolicyPid(), sysno);
// Allow the system calls below.
case __NR_fdatasync:
case __NR_fsync:
#if defined(__i386__) || defined(__x86_64__) || defined(__mips__) || \
defined(__aarch64__)
case __NR_getrlimit:
#endif
#if defined(__i386__) || defined(__arm__)
case __NR_ugetrlimit:
#endif
case __NR_mremap: // https://crbug.com/546204
case __NR_pwrite64:
case __NR_sysinfo:
case __NR_times:
case __NR_uname:
return Allow();
default:
// Default on the content baseline policy.
return BPFBasePolicy::EvaluateSyscall(sysno);
}
}
} // namespace policy
} // namespace sandbox