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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | /* * Copyright (c) 2015 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #include <mach/exception_types.h> #include <mach/mach_types.h> #include <sys/param.h> #include <sys/user.h> #include <sys/proc.h> #include <sys/proc_internal.h> #include <sys/kauth.h> #include <kern/task.h> #include <security/mac_framework.h> #include <security/mac_internal.h> #include <security/mac_mach_internal.h> static struct proc * mac_task_get_proc(struct task *task) { if (task == current_task()) return proc_self(); /* * Tasks don't really hold a reference on a proc unless the * calling thread belongs to the task in question. */ int pid = task_pid(task); struct proc *p = proc_find(pid); if (p != NULL) { if (proc_task(p) == task) return p; proc_rele(p); } return NULL; } int mac_task_check_expose_task(struct task *task) { int error; struct proc *p = mac_task_get_proc(task); if (p == NULL) return ESRCH; struct ucred *cred = kauth_cred_get(); MAC_CHECK(proc_check_expose_task, cred, p); proc_rele(p); return (error); } int mac_task_check_set_host_special_port(struct task *task, int id, struct ipc_port *port) { int error; struct proc *p = mac_task_get_proc(task); if (p == NULL) return ESRCH; kauth_cred_t cred = kauth_cred_proc_ref(p); MAC_CHECK(proc_check_set_host_special_port, cred, id, port); kauth_cred_unref(&cred); proc_rele(p); return (error); } int mac_task_check_set_host_exception_port(struct task *task, unsigned int exception) { int error; struct proc *p = mac_task_get_proc(task); if (p == NULL) return ESRCH; kauth_cred_t cred = kauth_cred_proc_ref(p); MAC_CHECK(proc_check_set_host_exception_port, cred, exception); kauth_cred_unref(&cred); proc_rele(p); return (error); } int mac_task_check_set_host_exception_ports(struct task *task, unsigned int exception_mask) { int error = 0; int exception; struct proc *p = mac_task_get_proc(task); if (p == NULL) return ESRCH; kauth_cred_t cred = kauth_cred_proc_ref(p); for (exception = FIRST_EXCEPTION; exception < EXC_TYPES_COUNT; exception++) { if (exception_mask & (1 << exception)) { MAC_CHECK(proc_check_set_host_exception_port, cred, exception); if (error) break; } } kauth_cred_unref(&cred); proc_rele(p); return (error); } void mac_thread_userret(struct thread *td) { MAC_PERFORM(thread_userret, td); } |