| // Copyright 2017 The Chromium Authors |
| // 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_cros_amd_gpu_policy_linux.h" |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <linux/kcmp.h> |
| #include <sys/socket.h> |
| |
| // Some arch's (arm64 for instance) unistd.h don't pull in symbols used here |
| // unless these are defined. |
| #define __ARCH_WANT_SYSCALL_NO_AT |
| #define __ARCH_WANT_SYSCALL_DEPRECATED |
| #include <unistd.h> |
| |
| #include "sandbox/linux/bpf_dsl/bpf_dsl.h" |
| #include "sandbox/linux/system_headers/linux_syscalls.h" |
| |
| using sandbox::bpf_dsl::AllOf; |
| using sandbox::bpf_dsl::Allow; |
| using sandbox::bpf_dsl::Arg; |
| using sandbox::bpf_dsl::Error; |
| using sandbox::bpf_dsl::If; |
| using sandbox::bpf_dsl::ResultExpr; |
| |
| namespace sandbox { |
| namespace policy { |
| |
| CrosAmdGpuProcessPolicy::CrosAmdGpuProcessPolicy() {} |
| |
| CrosAmdGpuProcessPolicy::~CrosAmdGpuProcessPolicy() {} |
| |
| ResultExpr CrosAmdGpuProcessPolicy::EvaluateSyscall(int sysno) const { |
| switch (sysno) { |
| case __NR_sched_setaffinity: |
| case __NR_sched_setscheduler: |
| case __NR_sysinfo: |
| case __NR_uname: |
| #if !defined(__aarch64__) |
| case __NR_readlink: |
| case __NR_stat: |
| #endif |
| return Allow(); |
| #if defined(__x86_64__) |
| // Allow only AF_UNIX for |domain|. |
| case __NR_socket: |
| case __NR_socketpair: { |
| const Arg<int> domain(0); |
| return If(domain == AF_UNIX, Allow()).Else(Error(EPERM)); |
| } |
| #endif |
| case __NR_kcmp: { |
| const Arg<int> pid1(0); |
| const Arg<int> pid2(1); |
| const Arg<int> type(2); |
| const int policy_pid = GetPolicyPid(); |
| // Only allowed when comparing file handles for the calling thread. |
| return If(AllOf(pid1 == policy_pid, pid2 == policy_pid, |
| type == KCMP_FILE), |
| Allow()) |
| .Else(Error(EPERM)); |
| } |
| default: |
| // Default to the generic GPU policy. |
| return GpuProcessPolicy::EvaluateSyscall(sysno); |
| } |
| } |
| |
| } // namespace policy |
| } // namespace sandbox |