11da177e4SLinus Torvalds /* Updated: Karl MacMillan <kmacmillan@tresys.com> 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Added conditional policy language extensions 41da177e4SLinus Torvalds * 582c21bfaSPaul Moore * Updated: Hewlett-Packard <paul@paul-moore.com> 63bb56b25SPaul Moore * 73bb56b25SPaul Moore * Added support for the policy capability bitmap 83bb56b25SPaul Moore * 93bb56b25SPaul Moore * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. 101da177e4SLinus Torvalds * Copyright (C) 2003 - 2004 Tresys Technology, LLC 111da177e4SLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 121da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 131da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 141da177e4SLinus Torvalds * the Free Software Foundation, version 2. 151da177e4SLinus Torvalds */ 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <linux/kernel.h> 181da177e4SLinus Torvalds #include <linux/pagemap.h> 191da177e4SLinus Torvalds #include <linux/slab.h> 201da177e4SLinus Torvalds #include <linux/vmalloc.h> 211da177e4SLinus Torvalds #include <linux/fs.h> 22bb003079SIngo Molnar #include <linux/mutex.h> 231da177e4SLinus Torvalds #include <linux/init.h> 241da177e4SLinus Torvalds #include <linux/string.h> 251da177e4SLinus Torvalds #include <linux/security.h> 261da177e4SLinus Torvalds #include <linux/major.h> 271da177e4SLinus Torvalds #include <linux/seq_file.h> 281da177e4SLinus Torvalds #include <linux/percpu.h> 29af601e46SSteve Grubb #include <linux/audit.h> 30f5269710SEric Paris #include <linux/uaccess.h> 317a627e3bSGreg Kroah-Hartman #include <linux/kobject.h> 320f7e4c33SKohei Kaigai #include <linux/ctype.h> 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds /* selinuxfs pseudo filesystem for exporting the security policy API. 351da177e4SLinus Torvalds Based on the proc code and the fs/nfsd/nfsctl.c code. */ 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include "flask.h" 381da177e4SLinus Torvalds #include "avc.h" 391da177e4SLinus Torvalds #include "avc_ss.h" 401da177e4SLinus Torvalds #include "security.h" 411da177e4SLinus Torvalds #include "objsec.h" 421da177e4SLinus Torvalds #include "conditional.h" 431da177e4SLinus Torvalds 443bb56b25SPaul Moore /* Policy capability filenames */ 453bb56b25SPaul Moore static char *policycap_names[] = { 46b0c636b9SEric Paris "network_peer_controls", 47b0c636b9SEric Paris "open_perms" 483bb56b25SPaul Moore }; 493bb56b25SPaul Moore 501da177e4SLinus Torvalds unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds static int __init checkreqprot_setup(char *str) 531da177e4SLinus Torvalds { 54f5269710SEric Paris unsigned long checkreqprot; 55f5269710SEric Paris if (!strict_strtoul(str, 0, &checkreqprot)) 56f5269710SEric Paris selinux_checkreqprot = checkreqprot ? 1 : 0; 571da177e4SLinus Torvalds return 1; 581da177e4SLinus Torvalds } 591da177e4SLinus Torvalds __setup("checkreqprot=", checkreqprot_setup); 601da177e4SLinus Torvalds 61bb003079SIngo Molnar static DEFINE_MUTEX(sel_mutex); 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds /* global data for booleans */ 641872981bSEric Paris static struct dentry *bool_dir; 651872981bSEric Paris static int bool_num; 66d313f948SStephen Smalley static char **bool_pending_names; 671872981bSEric Paris static int *bool_pending_values; 681da177e4SLinus Torvalds 69e47c8fc5SChristopher J. PeBenito /* global data for classes */ 701872981bSEric Paris static struct dentry *class_dir; 71e47c8fc5SChristopher J. PeBenito static unsigned long last_class_ino; 72e47c8fc5SChristopher J. PeBenito 73cee74f47SEric Paris static char policy_opened; 74cee74f47SEric Paris 753bb56b25SPaul Moore /* global data for policy capabilities */ 761872981bSEric Paris static struct dentry *policycap_dir; 773bb56b25SPaul Moore 781da177e4SLinus Torvalds /* Check whether a task is allowed to use a security operation. */ 791da177e4SLinus Torvalds static int task_has_security(struct task_struct *tsk, 801da177e4SLinus Torvalds u32 perms) 811da177e4SLinus Torvalds { 82c69e8d9cSDavid Howells const struct task_security_struct *tsec; 83c69e8d9cSDavid Howells u32 sid = 0; 841da177e4SLinus Torvalds 85c69e8d9cSDavid Howells rcu_read_lock(); 86c69e8d9cSDavid Howells tsec = __task_cred(tsk)->security; 87c69e8d9cSDavid Howells if (tsec) 88c69e8d9cSDavid Howells sid = tsec->sid; 89c69e8d9cSDavid Howells rcu_read_unlock(); 901da177e4SLinus Torvalds if (!tsec) 911da177e4SLinus Torvalds return -EACCES; 921da177e4SLinus Torvalds 93c69e8d9cSDavid Howells return avc_has_perm(sid, SECINITSID_SECURITY, 941da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds enum sel_inos { 981da177e4SLinus Torvalds SEL_ROOT_INO = 2, 991da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 1001da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 1011da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 1021da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 1031da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 1041da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 1051da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 1061da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 1071da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 1081da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 1091da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 1101da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 1111da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 1124e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 1133f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 1143f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 11511904167SKaiGai Kohei SEL_STATUS, /* export current status using mmap() */ 116cee74f47SEric Paris SEL_POLICY, /* allow userspace to read the in kernel policy */ 1176174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 1181da177e4SLinus Torvalds }; 1191da177e4SLinus Torvalds 1206174eafcSJames Carter static unsigned long sel_last_ino = SEL_INO_NEXT - 1; 1216174eafcSJames Carter 122f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 123bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 124e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1253bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 126f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 127f0ee2e46SJames Carter 1281da177e4SLinus Torvalds #define TMPBUFLEN 12 1291da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1301da177e4SLinus Torvalds size_t count, loff_t *ppos) 1311da177e4SLinus Torvalds { 1321da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1331da177e4SLinus Torvalds ssize_t length; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 1361da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1401da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1411da177e4SLinus Torvalds size_t count, loff_t *ppos) 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds { 144b77a493bSEric Paris char *page = NULL; 1451da177e4SLinus Torvalds ssize_t length; 1461da177e4SLinus Torvalds int new_value; 1471da177e4SLinus Torvalds 148b77a493bSEric Paris length = -ENOMEM; 149bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 150b77a493bSEric Paris goto out; 151b77a493bSEric Paris 1521da177e4SLinus Torvalds /* No partial writes. */ 153b77a493bSEric Paris length = EINVAL; 154b77a493bSEric Paris if (*ppos != 0) 155b77a493bSEric Paris goto out; 156b77a493bSEric Paris 157b77a493bSEric Paris length = -ENOMEM; 1581da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 1591da177e4SLinus Torvalds if (!page) 160b77a493bSEric Paris goto out; 161b77a493bSEric Paris 1621da177e4SLinus Torvalds length = -EFAULT; 1631da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1641da177e4SLinus Torvalds goto out; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds length = -EINVAL; 1671da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1681da177e4SLinus Torvalds goto out; 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1711da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1721da177e4SLinus Torvalds if (length) 1731da177e4SLinus Torvalds goto out; 174af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 1754746ec5bSEric Paris "enforcing=%d old_enforcing=%d auid=%u ses=%u", 1764746ec5bSEric Paris new_value, selinux_enforcing, 1774746ec5bSEric Paris audit_get_loginuid(current), 1784746ec5bSEric Paris audit_get_sessionid(current)); 1791da177e4SLinus Torvalds selinux_enforcing = new_value; 1801da177e4SLinus Torvalds if (selinux_enforcing) 1811da177e4SLinus Torvalds avc_ss_reset(0); 1821da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 18311904167SKaiGai Kohei selinux_status_update_setenforce(selinux_enforcing); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds length = count; 1861da177e4SLinus Torvalds out: 1871da177e4SLinus Torvalds free_page((unsigned long) page); 1881da177e4SLinus Torvalds return length; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds #else 1911da177e4SLinus Torvalds #define sel_write_enforce NULL 1921da177e4SLinus Torvalds #endif 1931da177e4SLinus Torvalds 1949c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1951da177e4SLinus Torvalds .read = sel_read_enforce, 1961da177e4SLinus Torvalds .write = sel_write_enforce, 19757a62c23SArnd Bergmann .llseek = generic_file_llseek, 1981da177e4SLinus Torvalds }; 1991da177e4SLinus Torvalds 2003f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 2013f12070eSEric Paris size_t count, loff_t *ppos) 2023f12070eSEric Paris { 2033f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 2043f12070eSEric Paris ssize_t length; 2053f12070eSEric Paris ino_t ino = filp->f_path.dentry->d_inode->i_ino; 2063f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 2073f12070eSEric Paris security_get_reject_unknown() : !security_get_allow_unknown(); 2083f12070eSEric Paris 2093f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 2103f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2113f12070eSEric Paris } 2123f12070eSEric Paris 2133f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 2143f12070eSEric Paris .read = sel_read_handle_unknown, 21557a62c23SArnd Bergmann .llseek = generic_file_llseek, 2163f12070eSEric Paris }; 2173f12070eSEric Paris 21811904167SKaiGai Kohei static int sel_open_handle_status(struct inode *inode, struct file *filp) 21911904167SKaiGai Kohei { 22011904167SKaiGai Kohei struct page *status = selinux_kernel_status_page(); 22111904167SKaiGai Kohei 22211904167SKaiGai Kohei if (!status) 22311904167SKaiGai Kohei return -ENOMEM; 22411904167SKaiGai Kohei 22511904167SKaiGai Kohei filp->private_data = status; 22611904167SKaiGai Kohei 22711904167SKaiGai Kohei return 0; 22811904167SKaiGai Kohei } 22911904167SKaiGai Kohei 23011904167SKaiGai Kohei static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, 23111904167SKaiGai Kohei size_t count, loff_t *ppos) 23211904167SKaiGai Kohei { 23311904167SKaiGai Kohei struct page *status = filp->private_data; 23411904167SKaiGai Kohei 23511904167SKaiGai Kohei BUG_ON(!status); 23611904167SKaiGai Kohei 23711904167SKaiGai Kohei return simple_read_from_buffer(buf, count, ppos, 23811904167SKaiGai Kohei page_address(status), 23911904167SKaiGai Kohei sizeof(struct selinux_kernel_status)); 24011904167SKaiGai Kohei } 24111904167SKaiGai Kohei 24211904167SKaiGai Kohei static int sel_mmap_handle_status(struct file *filp, 24311904167SKaiGai Kohei struct vm_area_struct *vma) 24411904167SKaiGai Kohei { 24511904167SKaiGai Kohei struct page *status = filp->private_data; 24611904167SKaiGai Kohei unsigned long size = vma->vm_end - vma->vm_start; 24711904167SKaiGai Kohei 24811904167SKaiGai Kohei BUG_ON(!status); 24911904167SKaiGai Kohei 25011904167SKaiGai Kohei /* only allows one page from the head */ 25111904167SKaiGai Kohei if (vma->vm_pgoff > 0 || size != PAGE_SIZE) 25211904167SKaiGai Kohei return -EIO; 25311904167SKaiGai Kohei /* disallow writable mapping */ 25411904167SKaiGai Kohei if (vma->vm_flags & VM_WRITE) 25511904167SKaiGai Kohei return -EPERM; 25611904167SKaiGai Kohei /* disallow mprotect() turns it into writable */ 25711904167SKaiGai Kohei vma->vm_flags &= ~VM_MAYWRITE; 25811904167SKaiGai Kohei 25911904167SKaiGai Kohei return remap_pfn_range(vma, vma->vm_start, 26011904167SKaiGai Kohei page_to_pfn(status), 26111904167SKaiGai Kohei size, vma->vm_page_prot); 26211904167SKaiGai Kohei } 26311904167SKaiGai Kohei 26411904167SKaiGai Kohei static const struct file_operations sel_handle_status_ops = { 26511904167SKaiGai Kohei .open = sel_open_handle_status, 26611904167SKaiGai Kohei .read = sel_read_handle_status, 26711904167SKaiGai Kohei .mmap = sel_mmap_handle_status, 26811904167SKaiGai Kohei .llseek = generic_file_llseek, 26911904167SKaiGai Kohei }; 27011904167SKaiGai Kohei 2711da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2721da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file *file, const char __user *buf, 2731da177e4SLinus Torvalds size_t count, loff_t *ppos) 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds { 276b77a493bSEric Paris char *page = NULL; 2771da177e4SLinus Torvalds ssize_t length; 2781da177e4SLinus Torvalds int new_value; 2791da177e4SLinus Torvalds 280b77a493bSEric Paris length = -ENOMEM; 281bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2826eab04a8SJustin P. Mattock goto out; 283b77a493bSEric Paris 2841da177e4SLinus Torvalds /* No partial writes. */ 285b77a493bSEric Paris length = -EINVAL; 286b77a493bSEric Paris if (*ppos != 0) 287b77a493bSEric Paris goto out; 288b77a493bSEric Paris 289b77a493bSEric Paris length = -ENOMEM; 2901da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 2911da177e4SLinus Torvalds if (!page) 292b77a493bSEric Paris goto out; 293b77a493bSEric Paris 2941da177e4SLinus Torvalds length = -EFAULT; 2951da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 2961da177e4SLinus Torvalds goto out; 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds length = -EINVAL; 2991da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 3001da177e4SLinus Torvalds goto out; 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds if (new_value) { 3031da177e4SLinus Torvalds length = selinux_disable(); 304b77a493bSEric Paris if (length) 3051da177e4SLinus Torvalds goto out; 306af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 3074746ec5bSEric Paris "selinux=0 auid=%u ses=%u", 3084746ec5bSEric Paris audit_get_loginuid(current), 3094746ec5bSEric Paris audit_get_sessionid(current)); 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds length = count; 3131da177e4SLinus Torvalds out: 3141da177e4SLinus Torvalds free_page((unsigned long) page); 3151da177e4SLinus Torvalds return length; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds #else 3181da177e4SLinus Torvalds #define sel_write_disable NULL 3191da177e4SLinus Torvalds #endif 3201da177e4SLinus Torvalds 3219c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3221da177e4SLinus Torvalds .write = sel_write_disable, 32357a62c23SArnd Bergmann .llseek = generic_file_llseek, 3241da177e4SLinus Torvalds }; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3271da177e4SLinus Torvalds size_t count, loff_t *ppos) 3281da177e4SLinus Torvalds { 3291da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3301da177e4SLinus Torvalds ssize_t length; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3331da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds 3369c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3371da177e4SLinus Torvalds .read = sel_read_policyvers, 33857a62c23SArnd Bergmann .llseek = generic_file_llseek, 3391da177e4SLinus Torvalds }; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds /* declaration for sel_write_load */ 3421da177e4SLinus Torvalds static int sel_make_bools(void); 343e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void); 3443bb56b25SPaul Moore static int sel_make_policycap(void); 345e47c8fc5SChristopher J. PeBenito 346e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 347e47c8fc5SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 348e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3511da177e4SLinus Torvalds size_t count, loff_t *ppos) 3521da177e4SLinus Torvalds { 3531da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3541da177e4SLinus Torvalds ssize_t length; 3551da177e4SLinus Torvalds 3560719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3570719aaf5SGuido Trentalancia security_mls_enabled()); 3581da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 3619c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3621da177e4SLinus Torvalds .read = sel_read_mls, 36357a62c23SArnd Bergmann .llseek = generic_file_llseek, 3641da177e4SLinus Torvalds }; 3651da177e4SLinus Torvalds 366cee74f47SEric Paris struct policy_load_memory { 367cee74f47SEric Paris size_t len; 368cee74f47SEric Paris void *data; 369cee74f47SEric Paris }; 370cee74f47SEric Paris 371cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 372cee74f47SEric Paris { 373cee74f47SEric Paris struct policy_load_memory *plm = NULL; 374cee74f47SEric Paris int rc; 375cee74f47SEric Paris 376cee74f47SEric Paris BUG_ON(filp->private_data); 377cee74f47SEric Paris 378cee74f47SEric Paris mutex_lock(&sel_mutex); 379cee74f47SEric Paris 380cee74f47SEric Paris rc = task_has_security(current, SECURITY__READ_POLICY); 381cee74f47SEric Paris if (rc) 382cee74f47SEric Paris goto err; 383cee74f47SEric Paris 384cee74f47SEric Paris rc = -EBUSY; 385cee74f47SEric Paris if (policy_opened) 386cee74f47SEric Paris goto err; 387cee74f47SEric Paris 388cee74f47SEric Paris rc = -ENOMEM; 389cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 390cee74f47SEric Paris if (!plm) 391cee74f47SEric Paris goto err; 392cee74f47SEric Paris 393cee74f47SEric Paris if (i_size_read(inode) != security_policydb_len()) { 394cee74f47SEric Paris mutex_lock(&inode->i_mutex); 395cee74f47SEric Paris i_size_write(inode, security_policydb_len()); 396cee74f47SEric Paris mutex_unlock(&inode->i_mutex); 397cee74f47SEric Paris } 398cee74f47SEric Paris 399cee74f47SEric Paris rc = security_read_policy(&plm->data, &plm->len); 400cee74f47SEric Paris if (rc) 401cee74f47SEric Paris goto err; 402cee74f47SEric Paris 403cee74f47SEric Paris policy_opened = 1; 404cee74f47SEric Paris 405cee74f47SEric Paris filp->private_data = plm; 406cee74f47SEric Paris 407cee74f47SEric Paris mutex_unlock(&sel_mutex); 408cee74f47SEric Paris 409cee74f47SEric Paris return 0; 410cee74f47SEric Paris err: 411cee74f47SEric Paris mutex_unlock(&sel_mutex); 412cee74f47SEric Paris 413cee74f47SEric Paris if (plm) 414cee74f47SEric Paris vfree(plm->data); 415cee74f47SEric Paris kfree(plm); 416cee74f47SEric Paris return rc; 417cee74f47SEric Paris } 418cee74f47SEric Paris 419cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 420cee74f47SEric Paris { 421cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 422cee74f47SEric Paris 423cee74f47SEric Paris BUG_ON(!plm); 424cee74f47SEric Paris 425cee74f47SEric Paris policy_opened = 0; 426cee74f47SEric Paris 427cee74f47SEric Paris vfree(plm->data); 428cee74f47SEric Paris kfree(plm); 429cee74f47SEric Paris 430cee74f47SEric Paris return 0; 431cee74f47SEric Paris } 432cee74f47SEric Paris 433cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 434cee74f47SEric Paris size_t count, loff_t *ppos) 435cee74f47SEric Paris { 436cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 437cee74f47SEric Paris int ret; 438cee74f47SEric Paris 439cee74f47SEric Paris mutex_lock(&sel_mutex); 440cee74f47SEric Paris 441cee74f47SEric Paris ret = task_has_security(current, SECURITY__READ_POLICY); 442cee74f47SEric Paris if (ret) 443cee74f47SEric Paris goto out; 444cee74f47SEric Paris 445cee74f47SEric Paris ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 446cee74f47SEric Paris out: 447cee74f47SEric Paris mutex_unlock(&sel_mutex); 448cee74f47SEric Paris return ret; 449cee74f47SEric Paris } 450cee74f47SEric Paris 451845ca30fSEric Paris static int sel_mmap_policy_fault(struct vm_area_struct *vma, 452845ca30fSEric Paris struct vm_fault *vmf) 453845ca30fSEric Paris { 454845ca30fSEric Paris struct policy_load_memory *plm = vma->vm_file->private_data; 455845ca30fSEric Paris unsigned long offset; 456845ca30fSEric Paris struct page *page; 457845ca30fSEric Paris 458845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 459845ca30fSEric Paris return VM_FAULT_SIGBUS; 460845ca30fSEric Paris 461845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 462845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 463845ca30fSEric Paris return VM_FAULT_SIGBUS; 464845ca30fSEric Paris 465845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 466845ca30fSEric Paris get_page(page); 467845ca30fSEric Paris 468845ca30fSEric Paris vmf->page = page; 469845ca30fSEric Paris 470845ca30fSEric Paris return 0; 471845ca30fSEric Paris } 472845ca30fSEric Paris 473845ca30fSEric Paris static struct vm_operations_struct sel_mmap_policy_ops = { 474845ca30fSEric Paris .fault = sel_mmap_policy_fault, 475845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 476845ca30fSEric Paris }; 477845ca30fSEric Paris 478ad3fa08cSJames Morris static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 479845ca30fSEric Paris { 480845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 481845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 482845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 483845ca30fSEric Paris 484845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 485845ca30fSEric Paris return -EACCES; 486845ca30fSEric Paris } 487845ca30fSEric Paris 488845ca30fSEric Paris vma->vm_flags |= VM_RESERVED; 489845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 490845ca30fSEric Paris 491845ca30fSEric Paris return 0; 492845ca30fSEric Paris } 493845ca30fSEric Paris 494cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 495cee74f47SEric Paris .open = sel_open_policy, 496cee74f47SEric Paris .read = sel_read_policy, 497845ca30fSEric Paris .mmap = sel_mmap_policy, 498cee74f47SEric Paris .release = sel_release_policy, 499cee74f47SEric Paris }; 500cee74f47SEric Paris 5011da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 5021da177e4SLinus Torvalds size_t count, loff_t *ppos) 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds { 5051da177e4SLinus Torvalds ssize_t length; 5061da177e4SLinus Torvalds void *data = NULL; 5071da177e4SLinus Torvalds 508bb003079SIngo Molnar mutex_lock(&sel_mutex); 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 5111da177e4SLinus Torvalds if (length) 5121da177e4SLinus Torvalds goto out; 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds /* No partial writes. */ 5151da177e4SLinus Torvalds length = -EINVAL; 516b77a493bSEric Paris if (*ppos != 0) 5171da177e4SLinus Torvalds goto out; 5181da177e4SLinus Torvalds 519b77a493bSEric Paris length = -EFBIG; 520b77a493bSEric Paris if (count > 64 * 1024 * 1024) 5211da177e4SLinus Torvalds goto out; 522b77a493bSEric Paris 523b77a493bSEric Paris length = -ENOMEM; 524b77a493bSEric Paris data = vmalloc(count); 525b77a493bSEric Paris if (!data) 526b77a493bSEric Paris goto out; 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds length = -EFAULT; 5291da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5301da177e4SLinus Torvalds goto out; 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds length = security_load_policy(data, count); 5331da177e4SLinus Torvalds if (length) 5341da177e4SLinus Torvalds goto out; 5351da177e4SLinus Torvalds 536b77a493bSEric Paris length = sel_make_bools(); 537b77a493bSEric Paris if (length) 538e47c8fc5SChristopher J. PeBenito goto out1; 539e47c8fc5SChristopher J. PeBenito 540b77a493bSEric Paris length = sel_make_classes(); 541b77a493bSEric Paris if (length) 5423bb56b25SPaul Moore goto out1; 5433bb56b25SPaul Moore 544b77a493bSEric Paris length = sel_make_policycap(); 545b77a493bSEric Paris if (length) 546b77a493bSEric Paris goto out1; 547b77a493bSEric Paris 5481da177e4SLinus Torvalds length = count; 549e47c8fc5SChristopher J. PeBenito 550e47c8fc5SChristopher J. PeBenito out1: 551af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 5524746ec5bSEric Paris "policy loaded auid=%u ses=%u", 5534746ec5bSEric Paris audit_get_loginuid(current), 5544746ec5bSEric Paris audit_get_sessionid(current)); 5551da177e4SLinus Torvalds out: 556bb003079SIngo Molnar mutex_unlock(&sel_mutex); 5571da177e4SLinus Torvalds vfree(data); 5581da177e4SLinus Torvalds return length; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5619c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5621da177e4SLinus Torvalds .write = sel_write_load, 56357a62c23SArnd Bergmann .llseek = generic_file_llseek, 5641da177e4SLinus Torvalds }; 5651da177e4SLinus Torvalds 566ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5671da177e4SLinus Torvalds { 568b77a493bSEric Paris char *canon = NULL; 569ce9982d0SStephen Smalley u32 sid, len; 5701da177e4SLinus Torvalds ssize_t length; 5711da177e4SLinus Torvalds 5721da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 5731da177e4SLinus Torvalds if (length) 574b77a493bSEric Paris goto out; 5751da177e4SLinus Torvalds 576ce9982d0SStephen Smalley length = security_context_to_sid(buf, size, &sid); 577b77a493bSEric Paris if (length) 578b77a493bSEric Paris goto out; 5791da177e4SLinus Torvalds 580ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 581b77a493bSEric Paris if (length) 582b77a493bSEric Paris goto out; 583ce9982d0SStephen Smalley 584b77a493bSEric Paris length = -ERANGE; 585ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 586744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 587744ba35eSEric Paris "payload max\n", __func__, len); 588ce9982d0SStephen Smalley goto out; 589ce9982d0SStephen Smalley } 590ce9982d0SStephen Smalley 591ce9982d0SStephen Smalley memcpy(buf, canon, len); 592ce9982d0SStephen Smalley length = len; 5931da177e4SLinus Torvalds out: 594ce9982d0SStephen Smalley kfree(canon); 5951da177e4SLinus Torvalds return length; 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 5991da177e4SLinus Torvalds size_t count, loff_t *ppos) 6001da177e4SLinus Torvalds { 6011da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 6021da177e4SLinus Torvalds ssize_t length; 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 6051da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6091da177e4SLinus Torvalds size_t count, loff_t *ppos) 6101da177e4SLinus Torvalds { 611b77a493bSEric Paris char *page = NULL; 6121da177e4SLinus Torvalds ssize_t length; 6131da177e4SLinus Torvalds unsigned int new_value; 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 6161da177e4SLinus Torvalds if (length) 617b77a493bSEric Paris goto out; 6181da177e4SLinus Torvalds 619b77a493bSEric Paris length = -ENOMEM; 620bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 621b77a493bSEric Paris goto out; 622b77a493bSEric Paris 6231da177e4SLinus Torvalds /* No partial writes. */ 624b77a493bSEric Paris length = -EINVAL; 625b77a493bSEric Paris if (*ppos != 0) 626b77a493bSEric Paris goto out; 627b77a493bSEric Paris 628b77a493bSEric Paris length = -ENOMEM; 6291da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 6301da177e4SLinus Torvalds if (!page) 631b77a493bSEric Paris goto out; 632b77a493bSEric Paris 6331da177e4SLinus Torvalds length = -EFAULT; 6341da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 6351da177e4SLinus Torvalds goto out; 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds length = -EINVAL; 6381da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6391da177e4SLinus Torvalds goto out; 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 6421da177e4SLinus Torvalds length = count; 6431da177e4SLinus Torvalds out: 6441da177e4SLinus Torvalds free_page((unsigned long) page); 6451da177e4SLinus Torvalds return length; 6461da177e4SLinus Torvalds } 6479c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6481da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6491da177e4SLinus Torvalds .write = sel_write_checkreqprot, 65057a62c23SArnd Bergmann .llseek = generic_file_llseek, 6511da177e4SLinus Torvalds }; 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds /* 6541da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 6551da177e4SLinus Torvalds */ 6561da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 6571da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 6581da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 6591da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 6601da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 6631da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 6641da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 6651da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 6661da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 6671da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 668ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 6691da177e4SLinus Torvalds }; 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 6721da177e4SLinus Torvalds { 6733d5ff529SJosef Sipek ino_t ino = file->f_path.dentry->d_inode->i_ino; 6741da177e4SLinus Torvalds char *data; 6751da177e4SLinus Torvalds ssize_t rv; 6761da177e4SLinus Torvalds 6776e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 6781da177e4SLinus Torvalds return -EINVAL; 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 6811da177e4SLinus Torvalds if (IS_ERR(data)) 6821da177e4SLinus Torvalds return PTR_ERR(data); 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 6851da177e4SLinus Torvalds if (rv > 0) { 6861da177e4SLinus Torvalds simple_transaction_set(file, rv); 6871da177e4SLinus Torvalds rv = size; 6881da177e4SLinus Torvalds } 6891da177e4SLinus Torvalds return rv; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds 6929c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 6931da177e4SLinus Torvalds .write = selinux_transaction_write, 6941da177e4SLinus Torvalds .read = simple_transaction_read, 6951da177e4SLinus Torvalds .release = simple_transaction_release, 69657a62c23SArnd Bergmann .llseek = generic_file_llseek, 6971da177e4SLinus Torvalds }; 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds /* 7001da177e4SLinus Torvalds * payload - write methods 7011da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 7021da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 7031da177e4SLinus Torvalds */ 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 7061da177e4SLinus Torvalds { 707b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 7081da177e4SLinus Torvalds u32 ssid, tsid; 7091da177e4SLinus Torvalds u16 tclass; 7101da177e4SLinus Torvalds struct av_decision avd; 7111da177e4SLinus Torvalds ssize_t length; 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 7141da177e4SLinus Torvalds if (length) 715b77a493bSEric Paris goto out; 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds length = -ENOMEM; 71889d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 7191da177e4SLinus Torvalds if (!scon) 720b77a493bSEric Paris goto out; 7211da177e4SLinus Torvalds 722b77a493bSEric Paris length = -ENOMEM; 72389d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 7241da177e4SLinus Torvalds if (!tcon) 7251da177e4SLinus Torvalds goto out; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds length = -EINVAL; 72819439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 729b77a493bSEric Paris goto out; 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 732b77a493bSEric Paris if (length) 733b77a493bSEric Paris goto out; 734b77a493bSEric Paris 7351da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 736b77a493bSEric Paris if (length) 737b77a493bSEric Paris goto out; 7381da177e4SLinus Torvalds 73919439d05SStephen Smalley security_compute_av_user(ssid, tsid, tclass, &avd); 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 7428a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 743f1c6381aSEric Paris avd.allowed, 0xffffffff, 7441da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 7458a6f83afSKaiGai Kohei avd.seqno, avd.flags); 7461da177e4SLinus Torvalds out: 747b77a493bSEric Paris kfree(tcon); 7481da177e4SLinus Torvalds kfree(scon); 7491da177e4SLinus Torvalds return length; 7501da177e4SLinus Torvalds } 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 7531da177e4SLinus Torvalds { 754b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 755f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 7561da177e4SLinus Torvalds u32 ssid, tsid, newsid; 7571da177e4SLinus Torvalds u16 tclass; 7581da177e4SLinus Torvalds ssize_t length; 759b77a493bSEric Paris char *newcon = NULL; 7601da177e4SLinus Torvalds u32 len; 761f50a3ec9SKohei Kaigai int nargs; 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 7641da177e4SLinus Torvalds if (length) 765b77a493bSEric Paris goto out; 7661da177e4SLinus Torvalds 7671da177e4SLinus Torvalds length = -ENOMEM; 76889d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 7691da177e4SLinus Torvalds if (!scon) 770b77a493bSEric Paris goto out; 7711da177e4SLinus Torvalds 772b77a493bSEric Paris length = -ENOMEM; 77389d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 7741da177e4SLinus Torvalds if (!tcon) 7751da177e4SLinus Torvalds goto out; 7761da177e4SLinus Torvalds 777f50a3ec9SKohei Kaigai length = -ENOMEM; 778f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 779f50a3ec9SKohei Kaigai if (!namebuf) 780b77a493bSEric Paris goto out; 7811da177e4SLinus Torvalds 782f50a3ec9SKohei Kaigai length = -EINVAL; 783f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 784f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 785f50a3ec9SKohei Kaigai goto out; 7860f7e4c33SKohei Kaigai if (nargs == 4) { 7870f7e4c33SKohei Kaigai /* 7880f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 7890f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 7900f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 7910f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 7920f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 7930f7e4c33SKohei Kaigai */ 7940f7e4c33SKohei Kaigai char *r, *w; 7950f7e4c33SKohei Kaigai int c1, c2; 7960f7e4c33SKohei Kaigai 7970f7e4c33SKohei Kaigai r = w = namebuf; 7980f7e4c33SKohei Kaigai do { 7990f7e4c33SKohei Kaigai c1 = *r++; 8000f7e4c33SKohei Kaigai if (c1 == '+') 8010f7e4c33SKohei Kaigai c1 = ' '; 8020f7e4c33SKohei Kaigai else if (c1 == '%') { 803af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 804af7ff2c2SAndy Shevchenko if (c1 < 0) 8050f7e4c33SKohei Kaigai goto out; 806af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 807af7ff2c2SAndy Shevchenko if (c2 < 0) 8080f7e4c33SKohei Kaigai goto out; 8090f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 8100f7e4c33SKohei Kaigai } 8110f7e4c33SKohei Kaigai *w++ = c1; 8120f7e4c33SKohei Kaigai } while (c1 != '\0'); 8130f7e4c33SKohei Kaigai 814f50a3ec9SKohei Kaigai objname = namebuf; 8150f7e4c33SKohei Kaigai } 816f50a3ec9SKohei Kaigai 8171da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 818b77a493bSEric Paris if (length) 819b77a493bSEric Paris goto out; 820b77a493bSEric Paris 8211da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 822b77a493bSEric Paris if (length) 823b77a493bSEric Paris goto out; 8241da177e4SLinus Torvalds 825f50a3ec9SKohei Kaigai length = security_transition_sid_user(ssid, tsid, tclass, 826f50a3ec9SKohei Kaigai objname, &newsid); 827b77a493bSEric Paris if (length) 828b77a493bSEric Paris goto out; 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 831b77a493bSEric Paris if (length) 832b77a493bSEric Paris goto out; 8331da177e4SLinus Torvalds 834b77a493bSEric Paris length = -ERANGE; 8351da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 836744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 837744ba35eSEric Paris "payload max\n", __func__, len); 838b77a493bSEric Paris goto out; 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds memcpy(buf, newcon, len); 8421da177e4SLinus Torvalds length = len; 8431da177e4SLinus Torvalds out: 844b77a493bSEric Paris kfree(newcon); 845f50a3ec9SKohei Kaigai kfree(namebuf); 846b77a493bSEric Paris kfree(tcon); 8471da177e4SLinus Torvalds kfree(scon); 8481da177e4SLinus Torvalds return length; 8491da177e4SLinus Torvalds } 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 8521da177e4SLinus Torvalds { 853b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 8541da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8551da177e4SLinus Torvalds u16 tclass; 8561da177e4SLinus Torvalds ssize_t length; 857b77a493bSEric Paris char *newcon = NULL; 8581da177e4SLinus Torvalds u32 len; 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 8611da177e4SLinus Torvalds if (length) 862b77a493bSEric Paris goto out; 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds length = -ENOMEM; 86589d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8661da177e4SLinus Torvalds if (!scon) 867b77a493bSEric Paris goto out; 8681da177e4SLinus Torvalds 869b77a493bSEric Paris length = -ENOMEM; 87089d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8711da177e4SLinus Torvalds if (!tcon) 8721da177e4SLinus Torvalds goto out; 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds length = -EINVAL; 8751da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 876b77a493bSEric Paris goto out; 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 879b77a493bSEric Paris if (length) 880b77a493bSEric Paris goto out; 881b77a493bSEric Paris 8821da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 883b77a493bSEric Paris if (length) 884b77a493bSEric Paris goto out; 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 887b77a493bSEric Paris if (length) 888b77a493bSEric Paris goto out; 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 891b77a493bSEric Paris if (length) 892b77a493bSEric Paris goto out; 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds length = -ERANGE; 895b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 896b77a493bSEric Paris goto out; 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds memcpy(buf, newcon, len); 8991da177e4SLinus Torvalds length = len; 9001da177e4SLinus Torvalds out: 901b77a493bSEric Paris kfree(newcon); 902b77a493bSEric Paris kfree(tcon); 9031da177e4SLinus Torvalds kfree(scon); 9041da177e4SLinus Torvalds return length; 9051da177e4SLinus Torvalds } 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 9081da177e4SLinus Torvalds { 909b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 910b77a493bSEric Paris u32 sid, *sids = NULL; 9111da177e4SLinus Torvalds ssize_t length; 9121da177e4SLinus Torvalds char *newcon; 9131da177e4SLinus Torvalds int i, rc; 9141da177e4SLinus Torvalds u32 len, nsids; 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 9171da177e4SLinus Torvalds if (length) 9186eab04a8SJustin P. Mattock goto out; 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds length = -ENOMEM; 92189d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 9221da177e4SLinus Torvalds if (!con) 9236eab04a8SJustin P. Mattock goto out; 9241da177e4SLinus Torvalds 925b77a493bSEric Paris length = -ENOMEM; 92689d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 9271da177e4SLinus Torvalds if (!user) 9281da177e4SLinus Torvalds goto out; 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds length = -EINVAL; 9311da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 932b77a493bSEric Paris goto out; 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds length = security_context_to_sid(con, strlen(con) + 1, &sid); 935b77a493bSEric Paris if (length) 936b77a493bSEric Paris goto out; 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 939b77a493bSEric Paris if (length) 940b77a493bSEric Paris goto out; 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 9431da177e4SLinus Torvalds ptr = buf + length; 9441da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 9451da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 9461da177e4SLinus Torvalds if (rc) { 9471da177e4SLinus Torvalds length = rc; 948b77a493bSEric Paris goto out; 9491da177e4SLinus Torvalds } 9501da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 9511da177e4SLinus Torvalds kfree(newcon); 9521da177e4SLinus Torvalds length = -ERANGE; 953b77a493bSEric Paris goto out; 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds memcpy(ptr, newcon, len); 9561da177e4SLinus Torvalds kfree(newcon); 9571da177e4SLinus Torvalds ptr += len; 9581da177e4SLinus Torvalds length += len; 9591da177e4SLinus Torvalds } 9601da177e4SLinus Torvalds out: 961b77a493bSEric Paris kfree(sids); 962b77a493bSEric Paris kfree(user); 9631da177e4SLinus Torvalds kfree(con); 9641da177e4SLinus Torvalds return length; 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 9681da177e4SLinus Torvalds { 969b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9701da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9711da177e4SLinus Torvalds u16 tclass; 9721da177e4SLinus Torvalds ssize_t length; 973b77a493bSEric Paris char *newcon = NULL; 9741da177e4SLinus Torvalds u32 len; 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 9771da177e4SLinus Torvalds if (length) 978b77a493bSEric Paris goto out; 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds length = -ENOMEM; 98189d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9821da177e4SLinus Torvalds if (!scon) 9836eab04a8SJustin P. Mattock goto out; 9841da177e4SLinus Torvalds 985b77a493bSEric Paris length = -ENOMEM; 98689d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9871da177e4SLinus Torvalds if (!tcon) 9881da177e4SLinus Torvalds goto out; 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds length = -EINVAL; 9911da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 992b77a493bSEric Paris goto out; 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); 995b77a493bSEric Paris if (length) 996b77a493bSEric Paris goto out; 997b77a493bSEric Paris 9981da177e4SLinus Torvalds length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); 999b77a493bSEric Paris if (length) 1000b77a493bSEric Paris goto out; 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 1003b77a493bSEric Paris if (length) 1004b77a493bSEric Paris goto out; 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 1007b77a493bSEric Paris if (length) 1008b77a493bSEric Paris goto out; 10091da177e4SLinus Torvalds 1010b77a493bSEric Paris length = -ERANGE; 10111da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1012744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 1013744ba35eSEric Paris "payload max\n", __func__, len); 1014b77a493bSEric Paris goto out; 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds memcpy(buf, newcon, len); 10181da177e4SLinus Torvalds length = len; 10191da177e4SLinus Torvalds out: 1020b77a493bSEric Paris kfree(newcon); 1021b77a493bSEric Paris kfree(tcon); 10221da177e4SLinus Torvalds kfree(scon); 10231da177e4SLinus Torvalds return length; 10241da177e4SLinus Torvalds } 10251da177e4SLinus Torvalds 10261da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 10271da177e4SLinus Torvalds { 10281da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 10291da177e4SLinus Torvalds 10301da177e4SLinus Torvalds if (ret) { 10311da177e4SLinus Torvalds ret->i_mode = mode; 10321da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds return ret; 10351da177e4SLinus Torvalds } 10361da177e4SLinus Torvalds 10371da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 10381da177e4SLinus Torvalds size_t count, loff_t *ppos) 10391da177e4SLinus Torvalds { 10401da177e4SLinus Torvalds char *page = NULL; 10411da177e4SLinus Torvalds ssize_t length; 10421da177e4SLinus Torvalds ssize_t ret; 10431da177e4SLinus Torvalds int cur_enforcing; 1044d313f948SStephen Smalley struct inode *inode = filep->f_path.dentry->d_inode; 1045d313f948SStephen Smalley unsigned index = inode->i_ino & SEL_INO_MASK; 1046d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 10471da177e4SLinus Torvalds 1048bb003079SIngo Molnar mutex_lock(&sel_mutex); 10491da177e4SLinus Torvalds 1050d313f948SStephen Smalley ret = -EINVAL; 1051b77a493bSEric Paris if (index >= bool_num || strcmp(name, bool_pending_names[index])) 1052d313f948SStephen Smalley goto out; 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds ret = -ENOMEM; 1055b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1056b77a493bSEric Paris if (!page) 10571da177e4SLinus Torvalds goto out; 10581da177e4SLinus Torvalds 1059d313f948SStephen Smalley cur_enforcing = security_get_bool_value(index); 10601da177e4SLinus Torvalds if (cur_enforcing < 0) { 10611da177e4SLinus Torvalds ret = cur_enforcing; 10621da177e4SLinus Torvalds goto out; 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 1065d313f948SStephen Smalley bool_pending_values[index]); 106668bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 10671da177e4SLinus Torvalds out: 1068bb003079SIngo Molnar mutex_unlock(&sel_mutex); 10691da177e4SLinus Torvalds free_page((unsigned long)page); 10701da177e4SLinus Torvalds return ret; 10711da177e4SLinus Torvalds } 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 10741da177e4SLinus Torvalds size_t count, loff_t *ppos) 10751da177e4SLinus Torvalds { 10761da177e4SLinus Torvalds char *page = NULL; 1077d313f948SStephen Smalley ssize_t length; 10781da177e4SLinus Torvalds int new_value; 1079d313f948SStephen Smalley struct inode *inode = filep->f_path.dentry->d_inode; 1080d313f948SStephen Smalley unsigned index = inode->i_ino & SEL_INO_MASK; 1081d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 10821da177e4SLinus Torvalds 1083bb003079SIngo Molnar mutex_lock(&sel_mutex); 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 10861da177e4SLinus Torvalds if (length) 10871da177e4SLinus Torvalds goto out; 10881da177e4SLinus Torvalds 1089d313f948SStephen Smalley length = -EINVAL; 1090b77a493bSEric Paris if (index >= bool_num || strcmp(name, bool_pending_names[index])) 1091d313f948SStephen Smalley goto out; 1092d313f948SStephen Smalley 10931da177e4SLinus Torvalds length = -ENOMEM; 1094b77a493bSEric Paris if (count >= PAGE_SIZE) 10951da177e4SLinus Torvalds goto out; 1096d313f948SStephen Smalley 10971da177e4SLinus Torvalds /* No partial writes. */ 1098d313f948SStephen Smalley length = -EINVAL; 1099b77a493bSEric Paris if (*ppos != 0) 11001da177e4SLinus Torvalds goto out; 1101b77a493bSEric Paris 11021da177e4SLinus Torvalds length = -ENOMEM; 1103b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1104b77a493bSEric Paris if (!page) 11051da177e4SLinus Torvalds goto out; 11061da177e4SLinus Torvalds 1107d313f948SStephen Smalley length = -EFAULT; 11081da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 11091da177e4SLinus Torvalds goto out; 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds length = -EINVAL; 11121da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 11131da177e4SLinus Torvalds goto out; 11141da177e4SLinus Torvalds 11151da177e4SLinus Torvalds if (new_value) 11161da177e4SLinus Torvalds new_value = 1; 11171da177e4SLinus Torvalds 1118d313f948SStephen Smalley bool_pending_values[index] = new_value; 11191da177e4SLinus Torvalds length = count; 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds out: 1122bb003079SIngo Molnar mutex_unlock(&sel_mutex); 11231da177e4SLinus Torvalds free_page((unsigned long) page); 11241da177e4SLinus Torvalds return length; 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds 11279c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 11281da177e4SLinus Torvalds .read = sel_read_bool, 11291da177e4SLinus Torvalds .write = sel_write_bool, 113057a62c23SArnd Bergmann .llseek = generic_file_llseek, 11311da177e4SLinus Torvalds }; 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 11341da177e4SLinus Torvalds const char __user *buf, 11351da177e4SLinus Torvalds size_t count, loff_t *ppos) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds char *page = NULL; 1138d313f948SStephen Smalley ssize_t length; 11391da177e4SLinus Torvalds int new_value; 11401da177e4SLinus Torvalds 1141bb003079SIngo Molnar mutex_lock(&sel_mutex); 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 11441da177e4SLinus Torvalds if (length) 11451da177e4SLinus Torvalds goto out; 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds length = -ENOMEM; 1148b77a493bSEric Paris if (count >= PAGE_SIZE) 11491da177e4SLinus Torvalds goto out; 1150b77a493bSEric Paris 11511da177e4SLinus Torvalds /* No partial writes. */ 1152b77a493bSEric Paris length = -EINVAL; 1153b77a493bSEric Paris if (*ppos != 0) 11541da177e4SLinus Torvalds goto out; 1155b77a493bSEric Paris 11561da177e4SLinus Torvalds length = -ENOMEM; 1157b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1158b77a493bSEric Paris if (!page) 11591da177e4SLinus Torvalds goto out; 11601da177e4SLinus Torvalds 1161d313f948SStephen Smalley length = -EFAULT; 11621da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 11631da177e4SLinus Torvalds goto out; 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds length = -EINVAL; 11661da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 11671da177e4SLinus Torvalds goto out; 11681da177e4SLinus Torvalds 1169b77a493bSEric Paris length = 0; 11701872981bSEric Paris if (new_value && bool_pending_values) 1171b77a493bSEric Paris length = security_set_bools(bool_num, bool_pending_values); 11721da177e4SLinus Torvalds 1173b77a493bSEric Paris if (!length) 11741da177e4SLinus Torvalds length = count; 11751da177e4SLinus Torvalds 11761da177e4SLinus Torvalds out: 1177bb003079SIngo Molnar mutex_unlock(&sel_mutex); 11781da177e4SLinus Torvalds free_page((unsigned long) page); 11791da177e4SLinus Torvalds return length; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 11829c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 11831da177e4SLinus Torvalds .write = sel_commit_bools_write, 118457a62c23SArnd Bergmann .llseek = generic_file_llseek, 11851da177e4SLinus Torvalds }; 11861da177e4SLinus Torvalds 11870c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 11881da177e4SLinus Torvalds { 11890955dc03SStephen Smalley struct list_head *node; 11901da177e4SLinus Torvalds 11912fd6b7f5SNick Piggin spin_lock(&de->d_lock); 11921da177e4SLinus Torvalds node = de->d_subdirs.next; 11931da177e4SLinus Torvalds while (node != &de->d_subdirs) { 11945160ee6fSEric Dumazet struct dentry *d = list_entry(node, struct dentry, d_u.d_child); 11952fd6b7f5SNick Piggin 11962fd6b7f5SNick Piggin spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED); 11971da177e4SLinus Torvalds list_del_init(node); 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds if (d->d_inode) { 1200dc0474beSNick Piggin dget_dlock(d); 12012fd6b7f5SNick Piggin spin_unlock(&de->d_lock); 12022fd6b7f5SNick Piggin spin_unlock(&d->d_lock); 12031da177e4SLinus Torvalds d_delete(d); 12041da177e4SLinus Torvalds simple_unlink(de->d_inode, d); 12051da177e4SLinus Torvalds dput(d); 12062fd6b7f5SNick Piggin spin_lock(&de->d_lock); 12072fd6b7f5SNick Piggin } else 12082fd6b7f5SNick Piggin spin_unlock(&d->d_lock); 12091da177e4SLinus Torvalds node = de->d_subdirs.next; 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12122fd6b7f5SNick Piggin spin_unlock(&de->d_lock); 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds static int sel_make_bools(void) 12181da177e4SLinus Torvalds { 1219b77a493bSEric Paris int i, ret; 12201da177e4SLinus Torvalds ssize_t len; 12211da177e4SLinus Torvalds struct dentry *dentry = NULL; 12221da177e4SLinus Torvalds struct dentry *dir = bool_dir; 12231da177e4SLinus Torvalds struct inode *inode = NULL; 12241da177e4SLinus Torvalds struct inode_security_struct *isec; 12251da177e4SLinus Torvalds char **names = NULL, *page; 12261da177e4SLinus Torvalds int num; 12271da177e4SLinus Torvalds int *values = NULL; 12281da177e4SLinus Torvalds u32 sid; 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds /* remove any existing files */ 12318007f102SXiaotian Feng for (i = 0; i < bool_num; i++) 12328007f102SXiaotian Feng kfree(bool_pending_names[i]); 1233d313f948SStephen Smalley kfree(bool_pending_names); 12341da177e4SLinus Torvalds kfree(bool_pending_values); 1235d313f948SStephen Smalley bool_pending_names = NULL; 123620c19e41SDavi Arnaut bool_pending_values = NULL; 12371da177e4SLinus Torvalds 12380c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 12391da177e4SLinus Torvalds 1240b77a493bSEric Paris ret = -ENOMEM; 12411872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 12421872981bSEric Paris if (!page) 1243b77a493bSEric Paris goto out; 12441da177e4SLinus Torvalds 12451da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 1246b77a493bSEric Paris if (ret) 12471da177e4SLinus Torvalds goto out; 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1250b77a493bSEric Paris ret = -ENOMEM; 12511da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1252b77a493bSEric Paris if (!dentry) 1253b77a493bSEric Paris goto out; 12541da177e4SLinus Torvalds 1255b77a493bSEric Paris ret = -ENOMEM; 1256b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 1257b77a493bSEric Paris if (!inode) 1258b77a493bSEric Paris goto out; 1259b77a493bSEric Paris 12601da177e4SLinus Torvalds ret = -EINVAL; 1261b77a493bSEric Paris len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 1262b77a493bSEric Paris if (len < 0) 1263b77a493bSEric Paris goto out; 1264b77a493bSEric Paris 12651da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1266b77a493bSEric Paris if (len >= PAGE_SIZE) 1267b77a493bSEric Paris goto out; 1268b77a493bSEric Paris 12691da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 12701872981bSEric Paris ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); 12711872981bSEric Paris if (ret) 1272b77a493bSEric Paris goto out; 1273b77a493bSEric Paris 12741da177e4SLinus Torvalds isec->sid = sid; 12751da177e4SLinus Torvalds isec->initialized = 1; 12761da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1277bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 12781da177e4SLinus Torvalds d_add(dentry, inode); 12791da177e4SLinus Torvalds } 12801da177e4SLinus Torvalds bool_num = num; 1281d313f948SStephen Smalley bool_pending_names = names; 12821da177e4SLinus Torvalds bool_pending_values = values; 1283b77a493bSEric Paris 1284b77a493bSEric Paris free_page((unsigned long)page); 1285b77a493bSEric Paris return 0; 12861da177e4SLinus Torvalds out: 12871da177e4SLinus Torvalds free_page((unsigned long)page); 1288b77a493bSEric Paris 12891da177e4SLinus Torvalds if (names) { 12909a5f04bfSJesper Juhl for (i = 0; i < num; i++) 12911da177e4SLinus Torvalds kfree(names[i]); 12921da177e4SLinus Torvalds kfree(names); 12931da177e4SLinus Torvalds } 129420c19e41SDavi Arnaut kfree(values); 12950c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1296b77a493bSEric Paris 1297b77a493bSEric Paris return ret; 12981da177e4SLinus Torvalds } 12991da177e4SLinus Torvalds 13001da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 13011da177e4SLinus Torvalds 13021872981bSEric Paris struct dentry *selinux_null; 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 13051da177e4SLinus Torvalds size_t count, loff_t *ppos) 13061da177e4SLinus Torvalds { 13071da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 13081da177e4SLinus Torvalds ssize_t length; 13091da177e4SLinus Torvalds 13101da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 13111da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 13151da177e4SLinus Torvalds const char __user *buf, 13161da177e4SLinus Torvalds size_t count, loff_t *ppos) 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds { 1319b77a493bSEric Paris char *page = NULL; 13201da177e4SLinus Torvalds ssize_t ret; 13211da177e4SLinus Torvalds int new_value; 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 13241da177e4SLinus Torvalds if (ret) 1325b77a493bSEric Paris goto out; 1326b77a493bSEric Paris 1327b77a493bSEric Paris ret = -ENOMEM; 1328b77a493bSEric Paris if (count >= PAGE_SIZE) 1329b77a493bSEric Paris goto out; 1330b77a493bSEric Paris 1331b77a493bSEric Paris /* No partial writes. */ 1332b77a493bSEric Paris ret = -EINVAL; 1333b77a493bSEric Paris if (*ppos != 0) 1334b77a493bSEric Paris goto out; 1335b77a493bSEric Paris 1336b77a493bSEric Paris ret = -ENOMEM; 1337b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1338b77a493bSEric Paris if (!page) 1339b77a493bSEric Paris goto out; 1340b77a493bSEric Paris 1341b77a493bSEric Paris ret = -EFAULT; 1342b77a493bSEric Paris if (copy_from_user(page, buf, count)) 1343b77a493bSEric Paris goto out; 1344b77a493bSEric Paris 1345b77a493bSEric Paris ret = -EINVAL; 1346b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1347b77a493bSEric Paris goto out; 1348b77a493bSEric Paris 13491da177e4SLinus Torvalds avc_cache_threshold = new_value; 1350b77a493bSEric Paris 13511da177e4SLinus Torvalds ret = count; 13521da177e4SLinus Torvalds out: 1353b77a493bSEric Paris free_page((unsigned long)page); 13541da177e4SLinus Torvalds return ret; 13551da177e4SLinus Torvalds } 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 13581da177e4SLinus Torvalds size_t count, loff_t *ppos) 13591da177e4SLinus Torvalds { 13601da177e4SLinus Torvalds char *page; 1361b77a493bSEric Paris ssize_t length; 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1364b77a493bSEric Paris if (!page) 1365b77a493bSEric Paris return -ENOMEM; 1366b77a493bSEric Paris 1367b77a493bSEric Paris length = avc_get_hash_stats(page); 1368b77a493bSEric Paris if (length >= 0) 1369b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 13701da177e4SLinus Torvalds free_page((unsigned long)page); 1371b77a493bSEric Paris 1372b77a493bSEric Paris return length; 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds 13759c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 13761da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 13771da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 137857a62c23SArnd Bergmann .llseek = generic_file_llseek, 13791da177e4SLinus Torvalds }; 13801da177e4SLinus Torvalds 13819c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 13821da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 138357a62c23SArnd Bergmann .llseek = generic_file_llseek, 13841da177e4SLinus Torvalds }; 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 13871da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 13881da177e4SLinus Torvalds { 13891da177e4SLinus Torvalds int cpu; 13901da177e4SLinus Torvalds 13914f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 13921da177e4SLinus Torvalds if (!cpu_possible(cpu)) 13931da177e4SLinus Torvalds continue; 13941da177e4SLinus Torvalds *idx = cpu + 1; 13951da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 13961da177e4SLinus Torvalds } 13971da177e4SLinus Torvalds return NULL; 13981da177e4SLinus Torvalds } 13991da177e4SLinus Torvalds 14001da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 14011da177e4SLinus Torvalds { 14021da177e4SLinus Torvalds loff_t n = *pos - 1; 14031da177e4SLinus Torvalds 14041da177e4SLinus Torvalds if (*pos == 0) 14051da177e4SLinus Torvalds return SEQ_START_TOKEN; 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 14081da177e4SLinus Torvalds } 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 14111da177e4SLinus Torvalds { 14121da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 14131da177e4SLinus Torvalds } 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 14161da177e4SLinus Torvalds { 14171da177e4SLinus Torvalds struct avc_cache_stats *st = v; 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 14201da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 14211da177e4SLinus Torvalds "frees\n"); 1422257313b2SLinus Torvalds else { 1423257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1424257313b2SLinus Torvalds unsigned int misses = st->misses; 1425257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1426257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1427257313b2SLinus Torvalds hits, misses, st->allocations, 14281da177e4SLinus Torvalds st->reclaims, st->frees); 1429257313b2SLinus Torvalds } 14301da177e4SLinus Torvalds return 0; 14311da177e4SLinus Torvalds } 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 14341da177e4SLinus Torvalds { } 14351da177e4SLinus Torvalds 14361996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 14371da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 14381da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 14391da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 14401da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 14411da177e4SLinus Torvalds }; 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 14441da177e4SLinus Torvalds { 14451da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 14461da177e4SLinus Torvalds } 14471da177e4SLinus Torvalds 14489c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 14491da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 14501da177e4SLinus Torvalds .read = seq_read, 14511da177e4SLinus Torvalds .llseek = seq_lseek, 14521da177e4SLinus Torvalds .release = seq_release, 14531da177e4SLinus Torvalds }; 14541da177e4SLinus Torvalds #endif 14551da177e4SLinus Torvalds 14561da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 14571da177e4SLinus Torvalds { 1458b77a493bSEric Paris int i; 14591da177e4SLinus Torvalds static struct tree_descr files[] = { 14601da177e4SLinus Torvalds { "cache_threshold", 14611da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 14621da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 14631da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 14641da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 14651da177e4SLinus Torvalds #endif 14661da177e4SLinus Torvalds }; 14671da177e4SLinus Torvalds 14686e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 14691da177e4SLinus Torvalds struct inode *inode; 14701da177e4SLinus Torvalds struct dentry *dentry; 14711da177e4SLinus Torvalds 14721da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1473b77a493bSEric Paris if (!dentry) 1474b77a493bSEric Paris return -ENOMEM; 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 1477b77a493bSEric Paris if (!inode) 1478b77a493bSEric Paris return -ENOMEM; 1479b77a493bSEric Paris 14801da177e4SLinus Torvalds inode->i_fop = files[i].ops; 14816174eafcSJames Carter inode->i_ino = ++sel_last_ino; 14821da177e4SLinus Torvalds d_add(dentry, inode); 14831da177e4SLinus Torvalds } 1484b77a493bSEric Paris 1485b77a493bSEric Paris return 0; 14861da177e4SLinus Torvalds } 14871da177e4SLinus Torvalds 1488f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1489f0ee2e46SJames Carter size_t count, loff_t *ppos) 1490f0ee2e46SJames Carter { 1491f0ee2e46SJames Carter struct inode *inode; 1492f0ee2e46SJames Carter char *con; 1493f0ee2e46SJames Carter u32 sid, len; 1494f0ee2e46SJames Carter ssize_t ret; 1495f0ee2e46SJames Carter 1496f0ee2e46SJames Carter inode = file->f_path.dentry->d_inode; 1497f0ee2e46SJames Carter sid = inode->i_ino&SEL_INO_MASK; 1498f0ee2e46SJames Carter ret = security_sid_to_context(sid, &con, &len); 1499b77a493bSEric Paris if (ret) 1500f0ee2e46SJames Carter return ret; 1501f0ee2e46SJames Carter 1502f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1503f0ee2e46SJames Carter kfree(con); 1504f0ee2e46SJames Carter return ret; 1505f0ee2e46SJames Carter } 1506f0ee2e46SJames Carter 1507f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1508f0ee2e46SJames Carter .read = sel_read_initcon, 150957a62c23SArnd Bergmann .llseek = generic_file_llseek, 1510f0ee2e46SJames Carter }; 1511f0ee2e46SJames Carter 1512f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1513f0ee2e46SJames Carter { 1514b77a493bSEric Paris int i; 1515f0ee2e46SJames Carter 1516f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1517f0ee2e46SJames Carter struct inode *inode; 1518f0ee2e46SJames Carter struct dentry *dentry; 1519f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1520b77a493bSEric Paris if (!dentry) 1521b77a493bSEric Paris return -ENOMEM; 1522f0ee2e46SJames Carter 1523f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1524b77a493bSEric Paris if (!inode) 1525b77a493bSEric Paris return -ENOMEM; 1526b77a493bSEric Paris 1527f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1528f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1529f0ee2e46SJames Carter d_add(dentry, inode); 1530f0ee2e46SJames Carter } 1531b77a493bSEric Paris 1532b77a493bSEric Paris return 0; 1533f0ee2e46SJames Carter } 1534f0ee2e46SJames Carter 1535e47c8fc5SChristopher J. PeBenito static inline unsigned int sel_div(unsigned long a, unsigned long b) 1536e47c8fc5SChristopher J. PeBenito { 1537e47c8fc5SChristopher J. PeBenito return a / b - (a % b < 0); 1538e47c8fc5SChristopher J. PeBenito } 1539e47c8fc5SChristopher J. PeBenito 1540e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1541e47c8fc5SChristopher J. PeBenito { 1542e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1543e47c8fc5SChristopher J. PeBenito } 1544e47c8fc5SChristopher J. PeBenito 1545e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1546e47c8fc5SChristopher J. PeBenito { 1547e47c8fc5SChristopher J. PeBenito return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); 1548e47c8fc5SChristopher J. PeBenito } 1549e47c8fc5SChristopher J. PeBenito 1550e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1551e47c8fc5SChristopher J. PeBenito { 1552e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1553e47c8fc5SChristopher J. PeBenito } 1554e47c8fc5SChristopher J. PeBenito 1555e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1556e47c8fc5SChristopher J. PeBenito { 1557e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1558e47c8fc5SChristopher J. PeBenito } 1559e47c8fc5SChristopher J. PeBenito 1560e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1561e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1562e47c8fc5SChristopher J. PeBenito { 1563e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1564e47c8fc5SChristopher J. PeBenito char *page; 1565e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1566e47c8fc5SChristopher J. PeBenito 1567e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1568b77a493bSEric Paris if (!page) 1569b77a493bSEric Paris return -ENOMEM; 1570e47c8fc5SChristopher J. PeBenito 1571e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); 1572e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1573e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1574b77a493bSEric Paris 1575e47c8fc5SChristopher J. PeBenito return rc; 1576e47c8fc5SChristopher J. PeBenito } 1577e47c8fc5SChristopher J. PeBenito 1578e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1579e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 158057a62c23SArnd Bergmann .llseek = generic_file_llseek, 1581e47c8fc5SChristopher J. PeBenito }; 1582e47c8fc5SChristopher J. PeBenito 1583e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1584e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1585e47c8fc5SChristopher J. PeBenito { 1586e47c8fc5SChristopher J. PeBenito ssize_t rc, len; 1587e47c8fc5SChristopher J. PeBenito char *page; 1588e47c8fc5SChristopher J. PeBenito unsigned long ino = file->f_path.dentry->d_inode->i_ino; 1589e47c8fc5SChristopher J. PeBenito 1590e47c8fc5SChristopher J. PeBenito page = (char *)__get_free_page(GFP_KERNEL); 1591b77a493bSEric Paris if (!page) 1592b77a493bSEric Paris return -ENOMEM; 1593e47c8fc5SChristopher J. PeBenito 1594e47c8fc5SChristopher J. PeBenito len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); 1595e47c8fc5SChristopher J. PeBenito rc = simple_read_from_buffer(buf, count, ppos, page, len); 1596e47c8fc5SChristopher J. PeBenito free_page((unsigned long)page); 1597b77a493bSEric Paris 1598e47c8fc5SChristopher J. PeBenito return rc; 1599e47c8fc5SChristopher J. PeBenito } 1600e47c8fc5SChristopher J. PeBenito 1601e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1602e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 160357a62c23SArnd Bergmann .llseek = generic_file_llseek, 1604e47c8fc5SChristopher J. PeBenito }; 1605e47c8fc5SChristopher J. PeBenito 16063bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 16073bb56b25SPaul Moore size_t count, loff_t *ppos) 16083bb56b25SPaul Moore { 16093bb56b25SPaul Moore int value; 16103bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 16113bb56b25SPaul Moore ssize_t length; 16123bb56b25SPaul Moore unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; 16133bb56b25SPaul Moore 16143bb56b25SPaul Moore value = security_policycap_supported(i_ino & SEL_INO_MASK); 16153bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 16163bb56b25SPaul Moore 16173bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 16183bb56b25SPaul Moore } 16193bb56b25SPaul Moore 16203bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 16213bb56b25SPaul Moore .read = sel_read_policycap, 162257a62c23SArnd Bergmann .llseek = generic_file_llseek, 16233bb56b25SPaul Moore }; 16243bb56b25SPaul Moore 1625e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1626e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1627e47c8fc5SChristopher J. PeBenito { 1628b77a493bSEric Paris int i, rc, nperms; 1629e47c8fc5SChristopher J. PeBenito char **perms; 1630e47c8fc5SChristopher J. PeBenito 1631e47c8fc5SChristopher J. PeBenito rc = security_get_permissions(objclass, &perms, &nperms); 1632e47c8fc5SChristopher J. PeBenito if (rc) 1633b77a493bSEric Paris return rc; 1634e47c8fc5SChristopher J. PeBenito 1635e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1636e47c8fc5SChristopher J. PeBenito struct inode *inode; 1637e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1638e47c8fc5SChristopher J. PeBenito 1639b77a493bSEric Paris rc = -ENOMEM; 1640e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1641b77a493bSEric Paris if (!dentry) 1642b77a493bSEric Paris goto out; 1643e47c8fc5SChristopher J. PeBenito 1644e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1645b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1646b77a493bSEric Paris if (!inode) 1647b77a493bSEric Paris goto out; 1648b77a493bSEric Paris 1649e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1650e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1651e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1652e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1653e47c8fc5SChristopher J. PeBenito } 1654b77a493bSEric Paris rc = 0; 1655b77a493bSEric Paris out: 1656e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1657e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1658e47c8fc5SChristopher J. PeBenito kfree(perms); 1659e47c8fc5SChristopher J. PeBenito return rc; 1660e47c8fc5SChristopher J. PeBenito } 1661e47c8fc5SChristopher J. PeBenito 1662e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1663e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1664e47c8fc5SChristopher J. PeBenito { 1665e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1666e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1667e47c8fc5SChristopher J. PeBenito int rc; 1668e47c8fc5SChristopher J. PeBenito 1669e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1670b77a493bSEric Paris if (!dentry) 1671b77a493bSEric Paris return -ENOMEM; 1672e47c8fc5SChristopher J. PeBenito 1673e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1674b77a493bSEric Paris if (!inode) 1675b77a493bSEric Paris return -ENOMEM; 1676e47c8fc5SChristopher J. PeBenito 1677e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1678e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1679e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1680e47c8fc5SChristopher J. PeBenito 1681e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "perms"); 1682b77a493bSEric Paris if (!dentry) 1683b77a493bSEric Paris return -ENOMEM; 1684e47c8fc5SChristopher J. PeBenito 1685e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); 1686e47c8fc5SChristopher J. PeBenito if (rc) 1687b77a493bSEric Paris return rc; 1688e47c8fc5SChristopher J. PeBenito 1689e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1690e47c8fc5SChristopher J. PeBenito 1691e47c8fc5SChristopher J. PeBenito return rc; 1692e47c8fc5SChristopher J. PeBenito } 1693e47c8fc5SChristopher J. PeBenito 1694e47c8fc5SChristopher J. PeBenito static void sel_remove_classes(void) 1695e47c8fc5SChristopher J. PeBenito { 1696e47c8fc5SChristopher J. PeBenito struct list_head *class_node; 1697e47c8fc5SChristopher J. PeBenito 1698e47c8fc5SChristopher J. PeBenito list_for_each(class_node, &class_dir->d_subdirs) { 1699e47c8fc5SChristopher J. PeBenito struct dentry *class_subdir = list_entry(class_node, 1700e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1701e47c8fc5SChristopher J. PeBenito struct list_head *class_subdir_node; 1702e47c8fc5SChristopher J. PeBenito 1703e47c8fc5SChristopher J. PeBenito list_for_each(class_subdir_node, &class_subdir->d_subdirs) { 1704e47c8fc5SChristopher J. PeBenito struct dentry *d = list_entry(class_subdir_node, 1705e47c8fc5SChristopher J. PeBenito struct dentry, d_u.d_child); 1706e47c8fc5SChristopher J. PeBenito 1707e47c8fc5SChristopher J. PeBenito if (d->d_inode) 1708e47c8fc5SChristopher J. PeBenito if (d->d_inode->i_mode & S_IFDIR) 1709e47c8fc5SChristopher J. PeBenito sel_remove_entries(d); 1710e47c8fc5SChristopher J. PeBenito } 1711e47c8fc5SChristopher J. PeBenito 1712e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_subdir); 1713e47c8fc5SChristopher J. PeBenito } 1714e47c8fc5SChristopher J. PeBenito 1715e47c8fc5SChristopher J. PeBenito sel_remove_entries(class_dir); 1716e47c8fc5SChristopher J. PeBenito } 1717e47c8fc5SChristopher J. PeBenito 1718e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void) 1719e47c8fc5SChristopher J. PeBenito { 1720b77a493bSEric Paris int rc, nclasses, i; 1721e47c8fc5SChristopher J. PeBenito char **classes; 1722e47c8fc5SChristopher J. PeBenito 1723e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 1724e47c8fc5SChristopher J. PeBenito sel_remove_classes(); 1725e47c8fc5SChristopher J. PeBenito 1726e47c8fc5SChristopher J. PeBenito rc = security_get_classes(&classes, &nclasses); 1727b77a493bSEric Paris if (rc) 1728b77a493bSEric Paris return rc; 1729e47c8fc5SChristopher J. PeBenito 1730e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 1731e47c8fc5SChristopher J. PeBenito last_class_ino = sel_class_to_ino(nclasses + 2); 1732e47c8fc5SChristopher J. PeBenito 1733e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1734e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1735e47c8fc5SChristopher J. PeBenito 1736e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1737b77a493bSEric Paris class_name_dir = d_alloc_name(class_dir, classes[i]); 1738b77a493bSEric Paris if (!class_name_dir) 1739b77a493bSEric Paris goto out; 1740e47c8fc5SChristopher J. PeBenito 1741e47c8fc5SChristopher J. PeBenito rc = sel_make_dir(class_dir->d_inode, class_name_dir, 1742e47c8fc5SChristopher J. PeBenito &last_class_ino); 1743e47c8fc5SChristopher J. PeBenito if (rc) 1744b77a493bSEric Paris goto out; 1745e47c8fc5SChristopher J. PeBenito 1746e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1747e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1748e47c8fc5SChristopher J. PeBenito class_name_dir); 1749e47c8fc5SChristopher J. PeBenito if (rc) 1750b77a493bSEric Paris goto out; 1751e47c8fc5SChristopher J. PeBenito } 1752b77a493bSEric Paris rc = 0; 1753b77a493bSEric Paris out: 1754e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1755e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1756e47c8fc5SChristopher J. PeBenito kfree(classes); 1757e47c8fc5SChristopher J. PeBenito return rc; 1758e47c8fc5SChristopher J. PeBenito } 1759e47c8fc5SChristopher J. PeBenito 17603bb56b25SPaul Moore static int sel_make_policycap(void) 17613bb56b25SPaul Moore { 17623bb56b25SPaul Moore unsigned int iter; 17633bb56b25SPaul Moore struct dentry *dentry = NULL; 17643bb56b25SPaul Moore struct inode *inode = NULL; 17653bb56b25SPaul Moore 17663bb56b25SPaul Moore sel_remove_entries(policycap_dir); 17673bb56b25SPaul Moore 17683bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 17693bb56b25SPaul Moore if (iter < ARRAY_SIZE(policycap_names)) 17703bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, 17713bb56b25SPaul Moore policycap_names[iter]); 17723bb56b25SPaul Moore else 17733bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, "unknown"); 17743bb56b25SPaul Moore 17753bb56b25SPaul Moore if (dentry == NULL) 17763bb56b25SPaul Moore return -ENOMEM; 17773bb56b25SPaul Moore 17783bb56b25SPaul Moore inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); 17793bb56b25SPaul Moore if (inode == NULL) 17803bb56b25SPaul Moore return -ENOMEM; 17813bb56b25SPaul Moore 17823bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 17833bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 17843bb56b25SPaul Moore d_add(dentry, inode); 17853bb56b25SPaul Moore } 17863bb56b25SPaul Moore 17873bb56b25SPaul Moore return 0; 17883bb56b25SPaul Moore } 17893bb56b25SPaul Moore 17900dd4ae51SChristopher J. PeBenito static int sel_make_dir(struct inode *dir, struct dentry *dentry, 17910dd4ae51SChristopher J. PeBenito unsigned long *ino) 17921da177e4SLinus Torvalds { 17931da177e4SLinus Torvalds struct inode *inode; 17941da177e4SLinus Torvalds 1795edb20fb5SJames Morris inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1796b77a493bSEric Paris if (!inode) 1797b77a493bSEric Paris return -ENOMEM; 1798b77a493bSEric Paris 17991da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 18001da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 18010dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 180240e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1803d8c76e6fSDave Hansen inc_nlink(inode); 18041da177e4SLinus Torvalds d_add(dentry, inode); 1805edb20fb5SJames Morris /* bump link count on parent directory, too */ 1806d8c76e6fSDave Hansen inc_nlink(dir); 1807b77a493bSEric Paris 1808b77a493bSEric Paris return 0; 18091da177e4SLinus Torvalds } 18101da177e4SLinus Torvalds 18111da177e4SLinus Torvalds static int sel_fill_super(struct super_block *sb, void *data, int silent) 18121da177e4SLinus Torvalds { 18131da177e4SLinus Torvalds int ret; 18141da177e4SLinus Torvalds struct dentry *dentry; 1815edb20fb5SJames Morris struct inode *inode, *root_inode; 18161da177e4SLinus Torvalds struct inode_security_struct *isec; 18171da177e4SLinus Torvalds 18181da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 18191da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 18201da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1821ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 18221da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 18231da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 18241da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 18251da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 18261da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 18271da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 18281da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 18291da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 18301da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 18311da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 18323f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 18333f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 183411904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 1835cee74f47SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUSR}, 18361da177e4SLinus Torvalds /* last one */ {""} 18371da177e4SLinus Torvalds }; 18381da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 18391da177e4SLinus Torvalds if (ret) 1840161ce45aSJames Morris goto err; 18411da177e4SLinus Torvalds 1842edb20fb5SJames Morris root_inode = sb->s_root->d_inode; 1843edb20fb5SJames Morris 1844161ce45aSJames Morris ret = -ENOMEM; 1845b77a493bSEric Paris dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); 1846b77a493bSEric Paris if (!dentry) 1847161ce45aSJames Morris goto err; 18481da177e4SLinus Torvalds 18490dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1850cde174a8SJames Morris if (ret) 1851161ce45aSJames Morris goto err; 1852cde174a8SJames Morris 18531da177e4SLinus Torvalds bool_dir = dentry; 18541da177e4SLinus Torvalds 1855b77a493bSEric Paris ret = -ENOMEM; 18561da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1857b77a493bSEric Paris if (!dentry) 1858161ce45aSJames Morris goto err; 18591da177e4SLinus Torvalds 1860161ce45aSJames Morris ret = -ENOMEM; 1861b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1862b77a493bSEric Paris if (!inode) 1863161ce45aSJames Morris goto err; 1864b77a493bSEric Paris 18656174eafcSJames Carter inode->i_ino = ++sel_last_ino; 18661da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 18671da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 18681da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 18691da177e4SLinus Torvalds isec->initialized = 1; 18701da177e4SLinus Torvalds 18711da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 18721da177e4SLinus Torvalds d_add(dentry, inode); 18731da177e4SLinus Torvalds selinux_null = dentry; 18741da177e4SLinus Torvalds 1875161ce45aSJames Morris ret = -ENOMEM; 1876b77a493bSEric Paris dentry = d_alloc_name(sb->s_root, "avc"); 1877b77a493bSEric Paris if (!dentry) 1878161ce45aSJames Morris goto err; 18791da177e4SLinus Torvalds 18800dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 18811da177e4SLinus Torvalds if (ret) 1882161ce45aSJames Morris goto err; 18831da177e4SLinus Torvalds 18841da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 18851da177e4SLinus Torvalds if (ret) 1886161ce45aSJames Morris goto err; 1887f0ee2e46SJames Carter 1888f0ee2e46SJames Carter ret = -ENOMEM; 1889b77a493bSEric Paris dentry = d_alloc_name(sb->s_root, "initial_contexts"); 1890b77a493bSEric Paris if (!dentry) 1891f0ee2e46SJames Carter goto err; 1892f0ee2e46SJames Carter 18930dd4ae51SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1894f0ee2e46SJames Carter if (ret) 1895f0ee2e46SJames Carter goto err; 1896f0ee2e46SJames Carter 1897f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1898f0ee2e46SJames Carter if (ret) 1899f0ee2e46SJames Carter goto err; 1900f0ee2e46SJames Carter 1901e47c8fc5SChristopher J. PeBenito ret = -ENOMEM; 1902b77a493bSEric Paris dentry = d_alloc_name(sb->s_root, "class"); 1903b77a493bSEric Paris if (!dentry) 1904e47c8fc5SChristopher J. PeBenito goto err; 1905e47c8fc5SChristopher J. PeBenito 1906e47c8fc5SChristopher J. PeBenito ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 1907e47c8fc5SChristopher J. PeBenito if (ret) 1908e47c8fc5SChristopher J. PeBenito goto err; 1909e47c8fc5SChristopher J. PeBenito 1910e47c8fc5SChristopher J. PeBenito class_dir = dentry; 1911e47c8fc5SChristopher J. PeBenito 19123bb56b25SPaul Moore ret = -ENOMEM; 1913b77a493bSEric Paris dentry = d_alloc_name(sb->s_root, "policy_capabilities"); 1914b77a493bSEric Paris if (!dentry) 19153bb56b25SPaul Moore goto err; 19163bb56b25SPaul Moore 19173bb56b25SPaul Moore ret = sel_make_dir(root_inode, dentry, &sel_last_ino); 19183bb56b25SPaul Moore if (ret) 19193bb56b25SPaul Moore goto err; 19203bb56b25SPaul Moore 19213bb56b25SPaul Moore policycap_dir = dentry; 19223bb56b25SPaul Moore 1923b77a493bSEric Paris return 0; 1924161ce45aSJames Morris err: 1925744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", 1926744ba35eSEric Paris __func__); 1927b77a493bSEric Paris return ret; 19281da177e4SLinus Torvalds } 19291da177e4SLinus Torvalds 1930fc14f2feSAl Viro static struct dentry *sel_mount(struct file_system_type *fs_type, 1931fc14f2feSAl Viro int flags, const char *dev_name, void *data) 19321da177e4SLinus Torvalds { 1933fc14f2feSAl Viro return mount_single(fs_type, flags, data, sel_fill_super); 19341da177e4SLinus Torvalds } 19351da177e4SLinus Torvalds 19361da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 19371da177e4SLinus Torvalds .name = "selinuxfs", 1938fc14f2feSAl Viro .mount = sel_mount, 19391da177e4SLinus Torvalds .kill_sb = kill_litter_super, 19401da177e4SLinus Torvalds }; 19411da177e4SLinus Torvalds 19421da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 19437a627e3bSGreg Kroah-Hartman static struct kobject *selinuxfs_kobj; 19441da177e4SLinus Torvalds 19451da177e4SLinus Torvalds static int __init init_sel_fs(void) 19461da177e4SLinus Torvalds { 19471da177e4SLinus Torvalds int err; 19481da177e4SLinus Torvalds 19491da177e4SLinus Torvalds if (!selinux_enabled) 19501da177e4SLinus Torvalds return 0; 19517a627e3bSGreg Kroah-Hartman 19527a627e3bSGreg Kroah-Hartman selinuxfs_kobj = kobject_create_and_add("selinux", fs_kobj); 19537a627e3bSGreg Kroah-Hartman if (!selinuxfs_kobj) 19547a627e3bSGreg Kroah-Hartman return -ENOMEM; 19557a627e3bSGreg Kroah-Hartman 19561da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 19577a627e3bSGreg Kroah-Hartman if (err) { 19587a627e3bSGreg Kroah-Hartman kobject_put(selinuxfs_kobj); 1959b77a493bSEric Paris return err; 19607a627e3bSGreg Kroah-Hartman } 1961b77a493bSEric Paris 19621da177e4SLinus Torvalds selinuxfs_mount = kern_mount(&sel_fs_type); 19631da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 19641da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 19651da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 19661da177e4SLinus Torvalds selinuxfs_mount = NULL; 19671da177e4SLinus Torvalds } 1968b77a493bSEric Paris 19691da177e4SLinus Torvalds return err; 19701da177e4SLinus Torvalds } 19711da177e4SLinus Torvalds 19721da177e4SLinus Torvalds __initcall(init_sel_fs); 19731da177e4SLinus Torvalds 19741da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 19751da177e4SLinus Torvalds void exit_sel_fs(void) 19761da177e4SLinus Torvalds { 19777a627e3bSGreg Kroah-Hartman kobject_put(selinuxfs_kobj); 1978423e0ab0STim Chen kern_unmount(selinuxfs_mount); 19791da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 19801da177e4SLinus Torvalds } 19811da177e4SLinus Torvalds #endif 1982