X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/7e41aa883dd258f888d0470250eead40a53ef1f5..HEAD:/security/mac_process.c diff --git a/security/mac_process.c b/security/mac_process.c index 8071c3e65..09aa47db2 100644 --- a/security/mac_process.c +++ b/security/mac_process.c @@ -2,7 +2,7 @@ * Copyright (c) 2007-2010 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 @@ -11,10 +11,10 @@ * 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, @@ -22,7 +22,7 @@ * 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@ */ @@ -75,6 +75,8 @@ #include #include +#include + #include #include @@ -86,10 +88,11 @@ mac_cred_label_alloc(void) struct label *label; label = mac_labelzone_alloc(MAC_WAITOK); - if (label == NULL) - return (NULL); + if (label == NULL) { + return NULL; + } MAC_PERFORM(cred_label_init, label); - return (label); + return label; } void @@ -105,10 +108,38 @@ mac_cred_label_free(struct label *label) mac_labelzone_free(label); } -int -mac_cred_label_compare(struct label *a, struct label *b) +bool +mac_cred_label_is_equal(const struct label *a, const struct label *b) { - return (bcmp(a, b, sizeof (*a)) == 0); + if (a->l_flags != b->l_flags) { + return false; + } + for (int slot = 0; slot < MAC_MAX_SLOTS; slot++) { + const void *pa = a->l_perpolicy[slot].l_ptr; + const void *pb = b->l_perpolicy[slot].l_ptr; + + if (pa != pb) { + return false; + } + } + return true; +} + +uint32_t +mac_cred_label_hash_update(const struct label *a, uint32_t hash) +{ + hash = os_hash_jenkins_update(&a->l_flags, + sizeof(a->l_flags), hash); +#if __has_feature(ptrauth_calls) + for (int slot = 0; slot < MAC_MAX_SLOTS; slot++) { + const void *ptr = a->l_perpolicy[slot].l_ptr; + hash = os_hash_jenkins_update(&ptr, sizeof(ptr), hash); + } +#else + hash = os_hash_jenkins_update(&a->l_perpolicy, + sizeof(a->l_perpolicy), hash); +#endif + return hash; } int @@ -123,13 +154,12 @@ mac_cred_label_externalize_audit(struct proc *p, struct mac *mac) mac->m_string, mac->m_buflen); kauth_cred_unref(&cr); - return (error); + return error; } void mac_cred_label_destroy(kauth_cred_t cred) { - mac_cred_label_free(cred->cr_label); cred->cr_label = NULL; } @@ -142,7 +172,7 @@ mac_cred_label_externalize(struct label *label, char *elements, error = MAC_EXTERNALIZE(cred, label, elements, outbuf, outbuflen); - return (error); + return error; } int @@ -152,7 +182,7 @@ mac_cred_label_internalize(struct label *label, char *string) error = MAC_INTERNALIZE(cred, label, string); - return (error); + return error; } /* @@ -166,7 +196,7 @@ mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc) { MAC_PERFORM(cred_label_associate_fork, cred, proc); } - + /* * Initialize MAC label for the first kernel process, from which other * kernel processes and threads are spawned. @@ -174,7 +204,6 @@ mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc) void mac_cred_label_associate_kernel(kauth_cred_t cred) { - MAC_PERFORM(cred_label_associate_kernel, cred); } @@ -185,7 +214,6 @@ mac_cred_label_associate_kernel(kauth_cred_t cred) void mac_cred_label_associate_user(kauth_cred_t cred) { - MAC_PERFORM(cred_label_associate_user, cred); } @@ -197,7 +225,6 @@ mac_cred_label_associate_user(kauth_cred_t cred) void mac_cred_label_associate(struct ucred *parent_cred, struct ucred *child_cred) { - MAC_PERFORM(cred_label_associate, parent_cred, child_cred); } @@ -210,8 +237,9 @@ mac_execve_enter(user_addr_t mac_p, struct image_params *imgp) int error; size_t ulen; - if (mac_p == USER_ADDR_NULL) - return (0); + if (mac_p == USER_ADDR_NULL) { + return 0; + } if (IS_64BIT_PROCESS(current_proc())) { struct user64_mac mac64; @@ -224,18 +252,21 @@ mac_execve_enter(user_addr_t mac_p, struct image_params *imgp) mac.m_buflen = mac32.m_buflen; mac.m_string = mac32.m_string; } - if (error) - return (error); + if (error) { + return error; + } error = mac_check_structmac_consistent(&mac); - if (error) - return (error); + if (error) { + return error; + } execlabel = mac_cred_label_alloc(); MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK); error = copyinstr(CAST_USER_ADDR_T(mac.m_string), buffer, mac.m_buflen, &ulen); - if (error) + if (error) { goto out; + } AUDIT_ARG(mac_string, buffer); error = mac_cred_label_internalize(execlabel, buffer); @@ -246,7 +277,7 @@ out: } imgp->ip_execlabelp = execlabel; FREE(buffer, M_MACTEMP); - return (error); + return error; } /* @@ -275,14 +306,15 @@ mac_cred_check_label_update(kauth_cred_t cred, struct label *newlabel) int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif MAC_CHECK(cred_check_label_update, cred, newlabel); - return (error); + return error; } int @@ -291,45 +323,97 @@ mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2) int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif MAC_CHECK(cred_check_visible, u1, u2); + return error; +} + +int +mac_proc_check_debug(proc_ident_t tracing_ident, kauth_cred_t tracing_cred, proc_ident_t traced_ident) +{ + int error; + bool enforce; + proc_t tracingp; + +#if SECURITY_MAC_CHECK_ENFORCE + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } +#endif + /* + * Once all mac hooks adopt proc_ident_t, finding proc_t and releasing + * it below should go to mac_proc_check_enforce(). + */ + if ((tracingp = proc_find_ident(tracing_ident)) == PROC_NULL) { + return ESRCH; + } + enforce = mac_proc_check_enforce(tracingp); + proc_rele(tracingp); + + if (!enforce) { + return 0; + } + MAC_CHECK(proc_check_debug, tracing_cred, traced_ident); - return (error); + return error; } -/* - * called with process locked. - */ -void mac_proc_set_enforce(proc_t p, int enforce_flags) +int +mac_proc_check_dump_core(struct proc *proc) { - p->p_mac_enforce |= enforce_flags; + int error; + +#if SECURITY_MAC_CHECK_ENFORCE + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } +#endif + if (!mac_proc_check_enforce(proc)) { + return 0; + } + + MAC_CHECK(proc_check_dump_core, proc); + + return error; } int -mac_proc_check_debug(proc_t curp, struct proc *proc) +mac_proc_check_remote_thread_create(struct task *task, int flavor, thread_state_t new_state, mach_msg_type_number_t new_state_count) { + proc_t curp = current_proc(); + proc_t proc; kauth_cred_t cred; int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } + + proc = proc_find(task_pid(task)); + if (proc == PROC_NULL) { + return ESRCH; + } cred = kauth_cred_proc_ref(curp); - MAC_CHECK(proc_check_debug, cred, proc); + MAC_CHECK(proc_check_remote_thread_create, cred, proc, flavor, new_state, new_state_count); kauth_cred_unref(&cred); + proc_rele(proc); - return (error); + return error; } int @@ -339,49 +423,67 @@ mac_proc_check_fork(proc_t curp) int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } cred = kauth_cred_proc_ref(curp); MAC_CHECK(proc_check_fork, cred, curp); kauth_cred_unref(&cred); - return (error); + return error; } int -mac_proc_check_get_task_name(struct ucred *cred, struct proc *p) +mac_proc_check_get_task(struct ucred *cred, proc_ident_t pident, mach_task_flavor_t flavor) { int error; - MAC_CHECK(proc_check_get_task_name, cred, p); + assert(flavor <= TASK_FLAVOR_NAME); - return (error); -} + /* Also call the old hook for compatability, deprecating in rdar://66356944. */ + if (flavor == TASK_FLAVOR_CONTROL) { + MAC_CHECK(proc_check_get_task, cred, pident); + if (error) { + return error; + } + } -int -mac_proc_check_get_task(struct ucred *cred, struct proc *p) -{ - int error; + if (flavor == TASK_FLAVOR_NAME) { + MAC_CHECK(proc_check_get_task_name, cred, pident); + if (error) { + return error; + } + } - MAC_CHECK(proc_check_get_task, cred, p); + MAC_CHECK(proc_check_get_task_with_flavor, cred, pident, flavor); - return (error); + return error; } int -mac_proc_check_expose_task(struct ucred *cred, struct proc *p) +mac_proc_check_expose_task(struct ucred *cred, proc_ident_t pident, mach_task_flavor_t flavor) { int error; - MAC_CHECK(proc_check_expose_task, cred, p); + assert(flavor <= TASK_FLAVOR_NAME); + + /* Also call the old hook for compatability, deprecating in rdar://66356944. */ + if (flavor == TASK_FLAVOR_CONTROL) { + MAC_CHECK(proc_check_expose_task, cred, pident); + if (error) { + return error; + } + } - return (error); + MAC_CHECK(proc_check_expose_task_with_flavor, cred, pident, flavor); + + return error; } int @@ -391,7 +493,7 @@ mac_proc_check_inherit_ipc_ports(struct proc *p, struct vnode *cur_vp, off_t cur MAC_CHECK(proc_check_inherit_ipc_ports, p, cur_vp, cur_offset, img_vp, img_offset, scriptvp); - return (error); + return error; } /* @@ -407,18 +509,20 @@ mac_proc_check_map_anon(proc_t proc, user_addr_t u_addr, int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_vm_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_vm_enforce) { + return 0; + } #endif - if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE)) - return (0); + if (!mac_proc_check_enforce(proc)) { + return 0; + } cred = kauth_cred_proc_ref(proc); MAC_CHECK(proc_check_map_anon, proc, cred, u_addr, u_size, prot, flags, maxprot); kauth_cred_unref(&cred); - return (error); + return error; } int @@ -429,36 +533,45 @@ mac_proc_check_mprotect(proc_t proc, int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_vm_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_vm_enforce) { + return 0; + } #endif - if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE)) - return (0); + if (!mac_proc_check_enforce(proc)) { + return 0; + } cred = kauth_cred_proc_ref(proc); MAC_CHECK(proc_check_mprotect, cred, proc, addr, size, prot); kauth_cred_unref(&cred); - return (error); + return error; } int mac_proc_check_run_cs_invalid(proc_t proc) { int error; - + #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_vm_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_vm_enforce) { + return 0; + } #endif - + MAC_CHECK(proc_check_run_cs_invalid, proc); - - return (error); + + return error; +} + +void +mac_proc_notify_cs_invalidated(proc_t proc) +{ + MAC_PERFORM(proc_notify_cs_invalidated, proc); } - + int mac_proc_check_sched(proc_t curp, struct proc *proc) { @@ -466,19 +579,20 @@ mac_proc_check_sched(proc_t curp, struct proc *proc) int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } cred = kauth_cred_proc_ref(curp); MAC_CHECK(proc_check_sched, cred, proc); kauth_cred_unref(&cred); - return (error); + return error; } int @@ -488,103 +602,115 @@ mac_proc_check_signal(proc_t curp, struct proc *proc, int signum) int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } cred = kauth_cred_proc_ref(curp); MAC_CHECK(proc_check_signal, cred, proc, signum); kauth_cred_unref(&cred); - return (error); + return error; } int -mac_proc_check_wait(proc_t curp, struct proc *proc) +mac_proc_check_syscall_unix(proc_t curp, int scnum) { - kauth_cred_t cred; int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } - cred = kauth_cred_proc_ref(curp); - MAC_CHECK(proc_check_wait, cred, proc); - kauth_cred_unref(&cred); + MAC_CHECK(proc_check_syscall_unix, curp, scnum); - return (error); + return error; } int -mac_proc_check_suspend_resume(proc_t curp, int sr) +mac_proc_check_wait(proc_t curp, struct proc *proc) { kauth_cred_t cred; int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } cred = kauth_cred_proc_ref(curp); - MAC_CHECK(proc_check_suspend_resume, cred, curp, sr); + MAC_CHECK(proc_check_wait, cred, proc); kauth_cred_unref(&cred); - return (error); + return error; +} + +void +mac_proc_notify_exit(struct proc *proc) +{ + MAC_PERFORM(proc_notify_exit, proc); } int -mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op) +mac_proc_check_suspend_resume(proc_t proc, int sr) { kauth_cred_t cred; - int error = 0; + int error; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(current_proc())) { + return 0; + } - cred = kauth_cred_proc_ref(curp); - MAC_CHECK(proc_check_ledger, cred, proc, ledger_op); + cred = kauth_cred_proc_ref(current_proc()); + MAC_CHECK(proc_check_suspend_resume, cred, proc, sr); kauth_cred_unref(&cred); - return (error); + return error; } int -mac_proc_check_cpumon(proc_t curp) +mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op) { kauth_cred_t cred; int error = 0; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } cred = kauth_cred_proc_ref(curp); - MAC_CHECK(proc_check_cpumon, cred); + MAC_CHECK(proc_check_ledger, cred, proc, ledger_op); kauth_cred_unref(&cred); - return (error); + return error; } int @@ -594,21 +720,22 @@ mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor) int error = 0; #if SECURITY_MAC_CHECK_ENFORCE - /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) - return 0; + /* 21167099 - only check if we allow write */ + if (!mac_proc_enforce) { + return 0; + } #endif - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) - return 0; + if (!mac_proc_check_enforce(curp)) { + return 0; + } cred = kauth_cred_proc_ref(curp); MAC_CHECK(proc_check_proc_info, cred, target, callnum, flavor); kauth_cred_unref(&cred); - return (error); + return error; } - int mac_proc_check_get_cs_info(proc_t curp, proc_t target, unsigned int op) { @@ -617,17 +744,19 @@ mac_proc_check_get_cs_info(proc_t curp, proc_t target, unsigned int op) #if SECURITY_MAC_CHECK_ENFORCE /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) + if (!mac_proc_enforce) { return 0; + } #endif - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) + if (!mac_proc_check_enforce(curp)) { return 0; + } cred = kauth_cred_proc_ref(curp); MAC_CHECK(proc_check_get_cs_info, cred, target, op); kauth_cred_unref(&cred); - return (error); + return error; } int @@ -638,16 +767,17 @@ mac_proc_check_set_cs_info(proc_t curp, proc_t target, unsigned int op) #if SECURITY_MAC_CHECK_ENFORCE /* 21167099 - only check if we allow write */ - if (!mac_proc_enforce) + if (!mac_proc_enforce) { return 0; + } #endif - if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE)) + if (!mac_proc_check_enforce(curp)) { return 0; + } cred = kauth_cred_proc_ref(curp); MAC_CHECK(proc_check_set_cs_info, cred, target, op); kauth_cred_unref(&cred); - return (error); + return error; } -