289 lines
8.5 KiB
C
289 lines
8.5 KiB
C
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/*
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* Copyright (c) 2000-2009 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kern_xxx.c 8.2 (Berkeley) 11/14/93
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*/
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/*
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* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
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* support for mandatory and extensible security protections. This notice
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* is included in support of clause 2.2 (b) of the Apple Public License,
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* Version 2.0.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc_internal.h>
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#include <sys/kauth.h>
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#include <sys/reboot.h>
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#include <sys/vm.h>
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#include <sys/sysctl.h>
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#include <sys/buf.h>
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#include <security/audit/audit.h>
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#include <sys/mount_internal.h>
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#include <sys/sysproto.h>
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#if CONFIG_MACF
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#include <security/mac_framework.h>
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#endif
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#if CONFIG_ATM
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#include <atm/atm_internal.h>
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#endif
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#include <kern/kalloc.h>
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#include <kern/ext_paniclog.h>
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#include <IOKit/IOBSD.h>
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/* Max panic string length */
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#define kPanicStringMaxLen 1024
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extern int psem_cache_purge_all(void);
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extern int pshm_cache_purge_all(void);
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extern int pshm_cache_purge_uid(uid_t uid);
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extern void reset_osvariant_status(void);
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extern void reset_osreleasetype(void);
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int
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reboot(struct proc *p, struct reboot_args *uap, __unused int32_t *retval)
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{
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char *message = NULL;
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int error = 0;
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size_t dummy = 0;
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AUDIT_ARG(cmd, uap->opt);
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if ((error = suser(kauth_cred_get(), &p->p_acflag))) {
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#if (DEVELOPMENT || DEBUG)
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if (uap->opt & RB_PANIC) {
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/* clear 'error' to allow non-root users to call panic on dev/debug kernels */
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error = 0;
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} else {
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return error;
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}
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#else
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return error;
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#endif
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}
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if (uap->opt & RB_PANIC && uap->msg != USER_ADDR_NULL) {
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message = (char *)kalloc_data(kPanicStringMaxLen, Z_WAITOK | Z_ZERO);
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if (!message) {
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return ENOMEM;
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}
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int copy_error = copyinstr(uap->msg, (void *)message, kPanicStringMaxLen, (size_t *)&dummy);
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if (copy_error != 0 && copy_error != ENAMETOOLONG) {
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strncpy(message, "user space RB_PANIC message copyin failed", kPanicStringMaxLen - 1);
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} else {
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message[kPanicStringMaxLen - 1] = '\0';
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}
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}
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#if CONFIG_MACF
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#if (DEVELOPMENT || DEBUG)
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if (uap->opt & RB_PANIC) {
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/* on dev/debug kernels: allow anyone to call panic */
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goto skip_cred_check;
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}
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#endif
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error = mac_system_check_reboot(current_cached_proc_cred(p), uap->opt);
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#if (DEVELOPMENT || DEBUG)
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skip_cred_check:
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#endif
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#endif
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if (!error) {
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OSBitOrAtomic(P_REBOOT, &p->p_flag); /* No more signals for this proc */
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error = reboot_kernel(uap->opt, message);
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}
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kfree_data(message, kPanicStringMaxLen);
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return error;
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}
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int
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sys_panic_with_data(struct proc *p,
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struct panic_with_data_args *uap,
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__unused int32_t *retval)
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{
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char *message = NULL;
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void *data = NULL;
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int copy_len = 0;
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size_t dummy = 0;
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uuid_t uuid = {0};
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AUDIT_ARG(addr, uap->addr);
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AUDIT_ARG(value32, uap->len);
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AUDIT_ARG(addr, uap->uuid);
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if (!IOCurrentTaskHasEntitlement(EXTPANICLOG_ENTITLEMENT)) {
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return EPERM;
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}
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char *proc_name = proc_best_name(p);
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if (uap->msg != USER_ADDR_NULL) {
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message = (char *)kalloc_data(kPanicStringMaxLen, Z_WAITOK | Z_ZERO);
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if (!message) {
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goto finish;
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}
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int copy_error = copyinstr(uap->msg, (void *)message, kPanicStringMaxLen, (size_t *)&dummy);
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if (copy_error != 0 && copy_error != ENAMETOOLONG) {
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strlcpy(message, "user space panic_with_data message copyin failed", kPanicStringMaxLen - 1);
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} else {
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message[kPanicStringMaxLen - 1] = '\0';
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}
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}
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if (uap->addr != USER_ADDR_NULL) {
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copy_len = MIN(uap->len, PANIC_WITH_DATA_MAX_LEN);
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data = kalloc_data(copy_len, Z_WAITOK | Z_ZERO);
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if (!data) {
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goto finish;
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}
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int copy_error = copyin(uap->addr, data, copy_len);
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if (copy_error != 0) {
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kfree_data(data, copy_len);
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data = NULL;
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}
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}
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if (uap->uuid != USER_ADDR_NULL) {
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int copyerror = copyin(uap->uuid, &uuid[0], sizeof(uuid_t));
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if (copyerror != 0) {
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goto finish;
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}
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}
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finish:
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panic_with_data(uuid, data, copy_len,
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"Panic called from Process: %s Message: %s", proc_name, message);
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}
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extern void OSKextResetAfterUserspaceReboot(void);
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extern void zone_gc_drain(void);
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extern uint64_t pmap_release_pages_fast(void);
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static int
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usrctl_full(void)
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{
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reset_osvariant_status();
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reset_osreleasetype();
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#if CONFIG_ATM
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atm_reset();
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#endif
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#if CONFIG_EXT_RESOLVER
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/*
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* We're doing a user space reboot. We are guaranteed that the
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* external identity resolver is gone, so ensure that everything
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* comes back up as with fresh-boot just in case it didn't go
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* down cleanly.
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*/
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kauth_resolver_identity_reset();
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#endif /* CONFIG_EXT_RESOLVER */
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OSKextResetAfterUserspaceReboot();
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int shm_error = pshm_cache_purge_all();
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int sem_error = psem_cache_purge_all();
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zone_gc_drain();
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pmap_release_pages_fast();
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return shm_error != 0 ? shm_error : sem_error;
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}
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static int
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usrctl_logout(uid_t uid)
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{
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int shm_error = pshm_cache_purge_uid(uid);
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/*
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* Currently there is a requirement to purge some root-owned semaphores,
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* and no use-case for preserving any. Just purge all of them.
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*/
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int sem_error = psem_cache_purge_all();
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/*
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* Until rdar://78965143, kern.willuserspacereboot is set when logout begins
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* so its effects need to be reset here, when logout completes.
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*/
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OSKextResetAfterUserspaceReboot();
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return shm_error != 0 ? shm_error : sem_error;
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}
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int
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usrctl(struct proc *p, struct usrctl_args *uap, __unused int32_t *retval)
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{
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if (p != initproc) {
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return EPERM;
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}
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if (uap->flags == 0) {
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return usrctl_full();
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} else {
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return usrctl_logout((uid_t)uap->flags);
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}
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}
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