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", 472be4d74fSChris PeBenito "open_perms", 482be4d74fSChris PeBenito "redhat1", 492be4d74fSChris PeBenito "always_check_network" 503bb56b25SPaul Moore }; 513bb56b25SPaul Moore 521da177e4SLinus Torvalds unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds static int __init checkreqprot_setup(char *str) 551da177e4SLinus Torvalds { 56f5269710SEric Paris unsigned long checkreqprot; 5729707b20SJingoo Han if (!kstrtoul(str, 0, &checkreqprot)) 58f5269710SEric Paris selinux_checkreqprot = checkreqprot ? 1 : 0; 591da177e4SLinus Torvalds return 1; 601da177e4SLinus Torvalds } 611da177e4SLinus Torvalds __setup("checkreqprot=", checkreqprot_setup); 621da177e4SLinus Torvalds 63bb003079SIngo Molnar static DEFINE_MUTEX(sel_mutex); 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds /* global data for booleans */ 661872981bSEric Paris static struct dentry *bool_dir; 671872981bSEric Paris static int bool_num; 68d313f948SStephen Smalley static char **bool_pending_names; 691872981bSEric Paris static int *bool_pending_values; 701da177e4SLinus Torvalds 71e47c8fc5SChristopher J. PeBenito /* global data for classes */ 721872981bSEric Paris static struct dentry *class_dir; 73e47c8fc5SChristopher J. PeBenito static unsigned long last_class_ino; 74e47c8fc5SChristopher J. PeBenito 75cee74f47SEric Paris static char policy_opened; 76cee74f47SEric Paris 773bb56b25SPaul Moore /* global data for policy capabilities */ 781872981bSEric Paris static struct dentry *policycap_dir; 793bb56b25SPaul Moore 801da177e4SLinus Torvalds /* Check whether a task is allowed to use a security operation. */ 811da177e4SLinus Torvalds static int task_has_security(struct task_struct *tsk, 821da177e4SLinus Torvalds u32 perms) 831da177e4SLinus Torvalds { 84c69e8d9cSDavid Howells const struct task_security_struct *tsec; 85c69e8d9cSDavid Howells u32 sid = 0; 861da177e4SLinus Torvalds 87c69e8d9cSDavid Howells rcu_read_lock(); 88c69e8d9cSDavid Howells tsec = __task_cred(tsk)->security; 89c69e8d9cSDavid Howells if (tsec) 90c69e8d9cSDavid Howells sid = tsec->sid; 91c69e8d9cSDavid Howells rcu_read_unlock(); 921da177e4SLinus Torvalds if (!tsec) 931da177e4SLinus Torvalds return -EACCES; 941da177e4SLinus Torvalds 95c69e8d9cSDavid Howells return avc_has_perm(sid, SECINITSID_SECURITY, 961da177e4SLinus Torvalds SECCLASS_SECURITY, perms, NULL); 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds enum sel_inos { 1001da177e4SLinus Torvalds SEL_ROOT_INO = 2, 1011da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 1021da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 1031da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 1041da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 1051da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 1061da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 1071da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 1081da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 1091da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 1101da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 1111da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 1121da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 1131da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 1144e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 1153f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 1163f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 11711904167SKaiGai Kohei SEL_STATUS, /* export current status using mmap() */ 118cee74f47SEric Paris SEL_POLICY, /* allow userspace to read the in kernel policy */ 1196174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 1201da177e4SLinus Torvalds }; 1211da177e4SLinus Torvalds 1226174eafcSJames Carter static unsigned long sel_last_ino = SEL_INO_NEXT - 1; 1236174eafcSJames Carter 124f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 125bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 126e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1273bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 128f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 129f0ee2e46SJames Carter 1301da177e4SLinus Torvalds #define TMPBUFLEN 12 1311da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1321da177e4SLinus Torvalds size_t count, loff_t *ppos) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1351da177e4SLinus Torvalds ssize_t length; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 1381da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1421da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1431da177e4SLinus Torvalds size_t count, loff_t *ppos) 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds { 146b77a493bSEric Paris char *page = NULL; 1471da177e4SLinus Torvalds ssize_t length; 1481da177e4SLinus Torvalds int new_value; 1491da177e4SLinus Torvalds 150b77a493bSEric Paris length = -ENOMEM; 151bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 152b77a493bSEric Paris goto out; 153b77a493bSEric Paris 1541da177e4SLinus Torvalds /* No partial writes. */ 1556436a123SJoe Perches length = -EINVAL; 156b77a493bSEric Paris if (*ppos != 0) 157b77a493bSEric Paris goto out; 158b77a493bSEric Paris 159b77a493bSEric Paris length = -ENOMEM; 1601da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 1611da177e4SLinus Torvalds if (!page) 162b77a493bSEric Paris goto out; 163b77a493bSEric Paris 1641da177e4SLinus Torvalds length = -EFAULT; 1651da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 1661da177e4SLinus Torvalds goto out; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds length = -EINVAL; 1691da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1701da177e4SLinus Torvalds goto out; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1731da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1741da177e4SLinus Torvalds if (length) 1751da177e4SLinus Torvalds goto out; 176af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 1774746ec5bSEric Paris "enforcing=%d old_enforcing=%d auid=%u ses=%u", 1784746ec5bSEric Paris new_value, selinux_enforcing, 179581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 1804746ec5bSEric Paris audit_get_sessionid(current)); 1811da177e4SLinus Torvalds selinux_enforcing = new_value; 1821da177e4SLinus Torvalds if (selinux_enforcing) 1831da177e4SLinus Torvalds avc_ss_reset(0); 1841da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 18511904167SKaiGai Kohei selinux_status_update_setenforce(selinux_enforcing); 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds length = count; 1881da177e4SLinus Torvalds out: 1891da177e4SLinus Torvalds free_page((unsigned long) page); 1901da177e4SLinus Torvalds return length; 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds #else 1931da177e4SLinus Torvalds #define sel_write_enforce NULL 1941da177e4SLinus Torvalds #endif 1951da177e4SLinus Torvalds 1969c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1971da177e4SLinus Torvalds .read = sel_read_enforce, 1981da177e4SLinus Torvalds .write = sel_write_enforce, 19957a62c23SArnd Bergmann .llseek = generic_file_llseek, 2001da177e4SLinus Torvalds }; 2011da177e4SLinus Torvalds 2023f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 2033f12070eSEric Paris size_t count, loff_t *ppos) 2043f12070eSEric Paris { 2053f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 2063f12070eSEric Paris ssize_t length; 207496ad9aaSAl Viro ino_t ino = file_inode(filp)->i_ino; 2083f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 2093f12070eSEric Paris security_get_reject_unknown() : !security_get_allow_unknown(); 2103f12070eSEric Paris 2113f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 2123f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2133f12070eSEric Paris } 2143f12070eSEric Paris 2153f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 2163f12070eSEric Paris .read = sel_read_handle_unknown, 21757a62c23SArnd Bergmann .llseek = generic_file_llseek, 2183f12070eSEric Paris }; 2193f12070eSEric Paris 22011904167SKaiGai Kohei static int sel_open_handle_status(struct inode *inode, struct file *filp) 22111904167SKaiGai Kohei { 22211904167SKaiGai Kohei struct page *status = selinux_kernel_status_page(); 22311904167SKaiGai Kohei 22411904167SKaiGai Kohei if (!status) 22511904167SKaiGai Kohei return -ENOMEM; 22611904167SKaiGai Kohei 22711904167SKaiGai Kohei filp->private_data = status; 22811904167SKaiGai Kohei 22911904167SKaiGai Kohei return 0; 23011904167SKaiGai Kohei } 23111904167SKaiGai Kohei 23211904167SKaiGai Kohei static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, 23311904167SKaiGai Kohei size_t count, loff_t *ppos) 23411904167SKaiGai Kohei { 23511904167SKaiGai Kohei struct page *status = filp->private_data; 23611904167SKaiGai Kohei 23711904167SKaiGai Kohei BUG_ON(!status); 23811904167SKaiGai Kohei 23911904167SKaiGai Kohei return simple_read_from_buffer(buf, count, ppos, 24011904167SKaiGai Kohei page_address(status), 24111904167SKaiGai Kohei sizeof(struct selinux_kernel_status)); 24211904167SKaiGai Kohei } 24311904167SKaiGai Kohei 24411904167SKaiGai Kohei static int sel_mmap_handle_status(struct file *filp, 24511904167SKaiGai Kohei struct vm_area_struct *vma) 24611904167SKaiGai Kohei { 24711904167SKaiGai Kohei struct page *status = filp->private_data; 24811904167SKaiGai Kohei unsigned long size = vma->vm_end - vma->vm_start; 24911904167SKaiGai Kohei 25011904167SKaiGai Kohei BUG_ON(!status); 25111904167SKaiGai Kohei 25211904167SKaiGai Kohei /* only allows one page from the head */ 25311904167SKaiGai Kohei if (vma->vm_pgoff > 0 || size != PAGE_SIZE) 25411904167SKaiGai Kohei return -EIO; 25511904167SKaiGai Kohei /* disallow writable mapping */ 25611904167SKaiGai Kohei if (vma->vm_flags & VM_WRITE) 25711904167SKaiGai Kohei return -EPERM; 25811904167SKaiGai Kohei /* disallow mprotect() turns it into writable */ 25911904167SKaiGai Kohei vma->vm_flags &= ~VM_MAYWRITE; 26011904167SKaiGai Kohei 26111904167SKaiGai Kohei return remap_pfn_range(vma, vma->vm_start, 26211904167SKaiGai Kohei page_to_pfn(status), 26311904167SKaiGai Kohei size, vma->vm_page_prot); 26411904167SKaiGai Kohei } 26511904167SKaiGai Kohei 26611904167SKaiGai Kohei static const struct file_operations sel_handle_status_ops = { 26711904167SKaiGai Kohei .open = sel_open_handle_status, 26811904167SKaiGai Kohei .read = sel_read_handle_status, 26911904167SKaiGai Kohei .mmap = sel_mmap_handle_status, 27011904167SKaiGai Kohei .llseek = generic_file_llseek, 27111904167SKaiGai Kohei }; 27211904167SKaiGai Kohei 2731da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2741da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file *file, const char __user *buf, 2751da177e4SLinus Torvalds size_t count, loff_t *ppos) 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds { 278b77a493bSEric Paris char *page = NULL; 2791da177e4SLinus Torvalds ssize_t length; 2801da177e4SLinus Torvalds int new_value; 2811da177e4SLinus Torvalds 282b77a493bSEric Paris length = -ENOMEM; 283bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2846eab04a8SJustin P. Mattock goto out; 285b77a493bSEric Paris 2861da177e4SLinus Torvalds /* No partial writes. */ 287b77a493bSEric Paris length = -EINVAL; 288b77a493bSEric Paris if (*ppos != 0) 289b77a493bSEric Paris goto out; 290b77a493bSEric Paris 291b77a493bSEric Paris length = -ENOMEM; 2921da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 2931da177e4SLinus Torvalds if (!page) 294b77a493bSEric Paris goto out; 295b77a493bSEric Paris 2961da177e4SLinus Torvalds length = -EFAULT; 2971da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 2981da177e4SLinus Torvalds goto out; 2991da177e4SLinus Torvalds 3001da177e4SLinus Torvalds length = -EINVAL; 3011da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 3021da177e4SLinus Torvalds goto out; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds if (new_value) { 3051da177e4SLinus Torvalds length = selinux_disable(); 306b77a493bSEric Paris if (length) 3071da177e4SLinus Torvalds goto out; 308af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 3094746ec5bSEric Paris "selinux=0 auid=%u ses=%u", 310581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 3114746ec5bSEric Paris audit_get_sessionid(current)); 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds length = count; 3151da177e4SLinus Torvalds out: 3161da177e4SLinus Torvalds free_page((unsigned long) page); 3171da177e4SLinus Torvalds return length; 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds #else 3201da177e4SLinus Torvalds #define sel_write_disable NULL 3211da177e4SLinus Torvalds #endif 3221da177e4SLinus Torvalds 3239c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3241da177e4SLinus Torvalds .write = sel_write_disable, 32557a62c23SArnd Bergmann .llseek = generic_file_llseek, 3261da177e4SLinus Torvalds }; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3291da177e4SLinus Torvalds size_t count, loff_t *ppos) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3321da177e4SLinus Torvalds ssize_t length; 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3351da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3361da177e4SLinus Torvalds } 3371da177e4SLinus Torvalds 3389c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3391da177e4SLinus Torvalds .read = sel_read_policyvers, 34057a62c23SArnd Bergmann .llseek = generic_file_llseek, 3411da177e4SLinus Torvalds }; 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* declaration for sel_write_load */ 3441da177e4SLinus Torvalds static int sel_make_bools(void); 345e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void); 3463bb56b25SPaul Moore static int sel_make_policycap(void); 347e47c8fc5SChristopher J. PeBenito 348e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 349a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 350e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3531da177e4SLinus Torvalds size_t count, loff_t *ppos) 3541da177e4SLinus Torvalds { 3551da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3561da177e4SLinus Torvalds ssize_t length; 3571da177e4SLinus Torvalds 3580719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3590719aaf5SGuido Trentalancia security_mls_enabled()); 3601da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3611da177e4SLinus Torvalds } 3621da177e4SLinus Torvalds 3639c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3641da177e4SLinus Torvalds .read = sel_read_mls, 36557a62c23SArnd Bergmann .llseek = generic_file_llseek, 3661da177e4SLinus Torvalds }; 3671da177e4SLinus Torvalds 368cee74f47SEric Paris struct policy_load_memory { 369cee74f47SEric Paris size_t len; 370cee74f47SEric Paris void *data; 371cee74f47SEric Paris }; 372cee74f47SEric Paris 373cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 374cee74f47SEric Paris { 375cee74f47SEric Paris struct policy_load_memory *plm = NULL; 376cee74f47SEric Paris int rc; 377cee74f47SEric Paris 378cee74f47SEric Paris BUG_ON(filp->private_data); 379cee74f47SEric Paris 380cee74f47SEric Paris mutex_lock(&sel_mutex); 381cee74f47SEric Paris 382cee74f47SEric Paris rc = task_has_security(current, SECURITY__READ_POLICY); 383cee74f47SEric Paris if (rc) 384cee74f47SEric Paris goto err; 385cee74f47SEric Paris 386cee74f47SEric Paris rc = -EBUSY; 387cee74f47SEric Paris if (policy_opened) 388cee74f47SEric Paris goto err; 389cee74f47SEric Paris 390cee74f47SEric Paris rc = -ENOMEM; 391cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 392cee74f47SEric Paris if (!plm) 393cee74f47SEric Paris goto err; 394cee74f47SEric Paris 395cee74f47SEric Paris if (i_size_read(inode) != security_policydb_len()) { 396cee74f47SEric Paris mutex_lock(&inode->i_mutex); 397cee74f47SEric Paris i_size_write(inode, security_policydb_len()); 398cee74f47SEric Paris mutex_unlock(&inode->i_mutex); 399cee74f47SEric Paris } 400cee74f47SEric Paris 401cee74f47SEric Paris rc = security_read_policy(&plm->data, &plm->len); 402cee74f47SEric Paris if (rc) 403cee74f47SEric Paris goto err; 404cee74f47SEric Paris 405cee74f47SEric Paris policy_opened = 1; 406cee74f47SEric Paris 407cee74f47SEric Paris filp->private_data = plm; 408cee74f47SEric Paris 409cee74f47SEric Paris mutex_unlock(&sel_mutex); 410cee74f47SEric Paris 411cee74f47SEric Paris return 0; 412cee74f47SEric Paris err: 413cee74f47SEric Paris mutex_unlock(&sel_mutex); 414cee74f47SEric Paris 415cee74f47SEric Paris if (plm) 416cee74f47SEric Paris vfree(plm->data); 417cee74f47SEric Paris kfree(plm); 418cee74f47SEric Paris return rc; 419cee74f47SEric Paris } 420cee74f47SEric Paris 421cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 422cee74f47SEric Paris { 423cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 424cee74f47SEric Paris 425cee74f47SEric Paris BUG_ON(!plm); 426cee74f47SEric Paris 427cee74f47SEric Paris policy_opened = 0; 428cee74f47SEric Paris 429cee74f47SEric Paris vfree(plm->data); 430cee74f47SEric Paris kfree(plm); 431cee74f47SEric Paris 432cee74f47SEric Paris return 0; 433cee74f47SEric Paris } 434cee74f47SEric Paris 435cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 436cee74f47SEric Paris size_t count, loff_t *ppos) 437cee74f47SEric Paris { 438cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 439cee74f47SEric Paris int ret; 440cee74f47SEric Paris 441cee74f47SEric Paris mutex_lock(&sel_mutex); 442cee74f47SEric Paris 443cee74f47SEric Paris ret = task_has_security(current, SECURITY__READ_POLICY); 444cee74f47SEric Paris if (ret) 445cee74f47SEric Paris goto out; 446cee74f47SEric Paris 447cee74f47SEric Paris ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 448cee74f47SEric Paris out: 449cee74f47SEric Paris mutex_unlock(&sel_mutex); 450cee74f47SEric Paris return ret; 451cee74f47SEric Paris } 452cee74f47SEric Paris 453845ca30fSEric Paris static int sel_mmap_policy_fault(struct vm_area_struct *vma, 454845ca30fSEric Paris struct vm_fault *vmf) 455845ca30fSEric Paris { 456845ca30fSEric Paris struct policy_load_memory *plm = vma->vm_file->private_data; 457845ca30fSEric Paris unsigned long offset; 458845ca30fSEric Paris struct page *page; 459845ca30fSEric Paris 460845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 461845ca30fSEric Paris return VM_FAULT_SIGBUS; 462845ca30fSEric Paris 463845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 464845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 465845ca30fSEric Paris return VM_FAULT_SIGBUS; 466845ca30fSEric Paris 467845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 468845ca30fSEric Paris get_page(page); 469845ca30fSEric Paris 470845ca30fSEric Paris vmf->page = page; 471845ca30fSEric Paris 472845ca30fSEric Paris return 0; 473845ca30fSEric Paris } 474845ca30fSEric Paris 4757cbea8dcSKirill A. Shutemov static const struct vm_operations_struct sel_mmap_policy_ops = { 476845ca30fSEric Paris .fault = sel_mmap_policy_fault, 477845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 478845ca30fSEric Paris }; 479845ca30fSEric Paris 480ad3fa08cSJames Morris static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 481845ca30fSEric Paris { 482845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 483845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 484845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 485845ca30fSEric Paris 486845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 487845ca30fSEric Paris return -EACCES; 488845ca30fSEric Paris } 489845ca30fSEric Paris 490314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 491845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 492845ca30fSEric Paris 493845ca30fSEric Paris return 0; 494845ca30fSEric Paris } 495845ca30fSEric Paris 496cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 497cee74f47SEric Paris .open = sel_open_policy, 498cee74f47SEric Paris .read = sel_read_policy, 499845ca30fSEric Paris .mmap = sel_mmap_policy, 500cee74f47SEric Paris .release = sel_release_policy, 50147a93a5bSEric Paris .llseek = generic_file_llseek, 502cee74f47SEric Paris }; 503cee74f47SEric Paris 5041da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 5051da177e4SLinus Torvalds size_t count, loff_t *ppos) 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds { 5081da177e4SLinus Torvalds ssize_t length; 5091da177e4SLinus Torvalds void *data = NULL; 5101da177e4SLinus Torvalds 511bb003079SIngo Molnar mutex_lock(&sel_mutex); 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 5141da177e4SLinus Torvalds if (length) 5151da177e4SLinus Torvalds goto out; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds /* No partial writes. */ 5181da177e4SLinus Torvalds length = -EINVAL; 519b77a493bSEric Paris if (*ppos != 0) 5201da177e4SLinus Torvalds goto out; 5211da177e4SLinus Torvalds 522b77a493bSEric Paris length = -EFBIG; 523b77a493bSEric Paris if (count > 64 * 1024 * 1024) 5241da177e4SLinus Torvalds goto out; 525b77a493bSEric Paris 526b77a493bSEric Paris length = -ENOMEM; 527b77a493bSEric Paris data = vmalloc(count); 528b77a493bSEric Paris if (!data) 529b77a493bSEric Paris goto out; 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds length = -EFAULT; 5321da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5331da177e4SLinus Torvalds goto out; 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds length = security_load_policy(data, count); 5361da177e4SLinus Torvalds if (length) 5371da177e4SLinus Torvalds goto out; 5381da177e4SLinus Torvalds 539b77a493bSEric Paris length = sel_make_bools(); 540b77a493bSEric Paris if (length) 541e47c8fc5SChristopher J. PeBenito goto out1; 542e47c8fc5SChristopher J. PeBenito 543b77a493bSEric Paris length = sel_make_classes(); 544b77a493bSEric Paris if (length) 5453bb56b25SPaul Moore goto out1; 5463bb56b25SPaul Moore 547b77a493bSEric Paris length = sel_make_policycap(); 548b77a493bSEric Paris if (length) 549b77a493bSEric Paris goto out1; 550b77a493bSEric Paris 5511da177e4SLinus Torvalds length = count; 552e47c8fc5SChristopher J. PeBenito 553e47c8fc5SChristopher J. PeBenito out1: 554af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 5554746ec5bSEric Paris "policy loaded auid=%u ses=%u", 556581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 5574746ec5bSEric Paris audit_get_sessionid(current)); 5581da177e4SLinus Torvalds out: 559bb003079SIngo Molnar mutex_unlock(&sel_mutex); 5601da177e4SLinus Torvalds vfree(data); 5611da177e4SLinus Torvalds return length; 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds 5649c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5651da177e4SLinus Torvalds .write = sel_write_load, 56657a62c23SArnd Bergmann .llseek = generic_file_llseek, 5671da177e4SLinus Torvalds }; 5681da177e4SLinus Torvalds 569ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5701da177e4SLinus Torvalds { 571b77a493bSEric Paris char *canon = NULL; 572ce9982d0SStephen Smalley u32 sid, len; 5731da177e4SLinus Torvalds ssize_t length; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 5761da177e4SLinus Torvalds if (length) 577b77a493bSEric Paris goto out; 5781da177e4SLinus Torvalds 57952a4c640SNikolay Aleksandrov length = security_context_to_sid(buf, size, &sid, GFP_KERNEL); 580b77a493bSEric Paris if (length) 581b77a493bSEric Paris goto out; 5821da177e4SLinus Torvalds 583ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 584b77a493bSEric Paris if (length) 585b77a493bSEric Paris goto out; 586ce9982d0SStephen Smalley 587b77a493bSEric Paris length = -ERANGE; 588ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 589744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 590744ba35eSEric Paris "payload max\n", __func__, len); 591ce9982d0SStephen Smalley goto out; 592ce9982d0SStephen Smalley } 593ce9982d0SStephen Smalley 594ce9982d0SStephen Smalley memcpy(buf, canon, len); 595ce9982d0SStephen Smalley length = len; 5961da177e4SLinus Torvalds out: 597ce9982d0SStephen Smalley kfree(canon); 5981da177e4SLinus Torvalds return length; 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 6021da177e4SLinus Torvalds size_t count, loff_t *ppos) 6031da177e4SLinus Torvalds { 6041da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 6051da177e4SLinus Torvalds ssize_t length; 6061da177e4SLinus Torvalds 6071da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 6081da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6121da177e4SLinus Torvalds size_t count, loff_t *ppos) 6131da177e4SLinus Torvalds { 614b77a493bSEric Paris char *page = NULL; 6151da177e4SLinus Torvalds ssize_t length; 6161da177e4SLinus Torvalds unsigned int new_value; 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 6191da177e4SLinus Torvalds if (length) 620b77a493bSEric Paris goto out; 6211da177e4SLinus Torvalds 622b77a493bSEric Paris length = -ENOMEM; 623bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 624b77a493bSEric Paris goto out; 625b77a493bSEric Paris 6261da177e4SLinus Torvalds /* No partial writes. */ 627b77a493bSEric Paris length = -EINVAL; 628b77a493bSEric Paris if (*ppos != 0) 629b77a493bSEric Paris goto out; 630b77a493bSEric Paris 631b77a493bSEric Paris length = -ENOMEM; 6321da177e4SLinus Torvalds page = (char *)get_zeroed_page(GFP_KERNEL); 6331da177e4SLinus Torvalds if (!page) 634b77a493bSEric Paris goto out; 635b77a493bSEric Paris 6361da177e4SLinus Torvalds length = -EFAULT; 6371da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 6381da177e4SLinus Torvalds goto out; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds length = -EINVAL; 6411da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6421da177e4SLinus Torvalds goto out; 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 6451da177e4SLinus Torvalds length = count; 6461da177e4SLinus Torvalds out: 6471da177e4SLinus Torvalds free_page((unsigned long) page); 6481da177e4SLinus Torvalds return length; 6491da177e4SLinus Torvalds } 6509c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6511da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6521da177e4SLinus Torvalds .write = sel_write_checkreqprot, 65357a62c23SArnd Bergmann .llseek = generic_file_llseek, 6541da177e4SLinus Torvalds }; 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds /* 6571da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 6581da177e4SLinus Torvalds */ 6591da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 6601da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 6611da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 6621da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 6631da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 6661da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 6671da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 6681da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 6691da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 6701da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 671ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 6721da177e4SLinus Torvalds }; 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 6751da177e4SLinus Torvalds { 676496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 6771da177e4SLinus Torvalds char *data; 6781da177e4SLinus Torvalds ssize_t rv; 6791da177e4SLinus Torvalds 6806e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 6811da177e4SLinus Torvalds return -EINVAL; 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 6841da177e4SLinus Torvalds if (IS_ERR(data)) 6851da177e4SLinus Torvalds return PTR_ERR(data); 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 6881da177e4SLinus Torvalds if (rv > 0) { 6891da177e4SLinus Torvalds simple_transaction_set(file, rv); 6901da177e4SLinus Torvalds rv = size; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds return rv; 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds 6959c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 6961da177e4SLinus Torvalds .write = selinux_transaction_write, 6971da177e4SLinus Torvalds .read = simple_transaction_read, 6981da177e4SLinus Torvalds .release = simple_transaction_release, 69957a62c23SArnd Bergmann .llseek = generic_file_llseek, 7001da177e4SLinus Torvalds }; 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds /* 7031da177e4SLinus Torvalds * payload - write methods 7041da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 7051da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 7061da177e4SLinus Torvalds */ 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 7091da177e4SLinus Torvalds { 710b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 7111da177e4SLinus Torvalds u32 ssid, tsid; 7121da177e4SLinus Torvalds u16 tclass; 7131da177e4SLinus Torvalds struct av_decision avd; 7141da177e4SLinus Torvalds ssize_t length; 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 7171da177e4SLinus Torvalds if (length) 718b77a493bSEric Paris goto out; 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds length = -ENOMEM; 72189d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 7221da177e4SLinus Torvalds if (!scon) 723b77a493bSEric Paris goto out; 7241da177e4SLinus Torvalds 725b77a493bSEric Paris length = -ENOMEM; 72689d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 7271da177e4SLinus Torvalds if (!tcon) 7281da177e4SLinus Torvalds goto out; 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds length = -EINVAL; 73119439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 732b77a493bSEric Paris goto out; 7331da177e4SLinus Torvalds 73444be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 735b77a493bSEric Paris if (length) 736b77a493bSEric Paris goto out; 737b77a493bSEric Paris 73844be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 739b77a493bSEric Paris if (length) 740b77a493bSEric Paris goto out; 7411da177e4SLinus Torvalds 74219439d05SStephen Smalley security_compute_av_user(ssid, tsid, tclass, &avd); 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 7458a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 746f1c6381aSEric Paris avd.allowed, 0xffffffff, 7471da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 7488a6f83afSKaiGai Kohei avd.seqno, avd.flags); 7491da177e4SLinus Torvalds out: 750b77a493bSEric Paris kfree(tcon); 7511da177e4SLinus Torvalds kfree(scon); 7521da177e4SLinus Torvalds return length; 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 7561da177e4SLinus Torvalds { 757b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 758f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 7591da177e4SLinus Torvalds u32 ssid, tsid, newsid; 7601da177e4SLinus Torvalds u16 tclass; 7611da177e4SLinus Torvalds ssize_t length; 762b77a493bSEric Paris char *newcon = NULL; 7631da177e4SLinus Torvalds u32 len; 764f50a3ec9SKohei Kaigai int nargs; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 7671da177e4SLinus Torvalds if (length) 768b77a493bSEric Paris goto out; 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds length = -ENOMEM; 77189d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 7721da177e4SLinus Torvalds if (!scon) 773b77a493bSEric Paris goto out; 7741da177e4SLinus Torvalds 775b77a493bSEric Paris length = -ENOMEM; 77689d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 7771da177e4SLinus Torvalds if (!tcon) 7781da177e4SLinus Torvalds goto out; 7791da177e4SLinus Torvalds 780f50a3ec9SKohei Kaigai length = -ENOMEM; 781f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 782f50a3ec9SKohei Kaigai if (!namebuf) 783b77a493bSEric Paris goto out; 7841da177e4SLinus Torvalds 785f50a3ec9SKohei Kaigai length = -EINVAL; 786f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 787f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 788f50a3ec9SKohei Kaigai goto out; 7890f7e4c33SKohei Kaigai if (nargs == 4) { 7900f7e4c33SKohei Kaigai /* 7910f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 7920f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 7930f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 7940f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 7950f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 7960f7e4c33SKohei Kaigai */ 7970f7e4c33SKohei Kaigai char *r, *w; 7980f7e4c33SKohei Kaigai int c1, c2; 7990f7e4c33SKohei Kaigai 8000f7e4c33SKohei Kaigai r = w = namebuf; 8010f7e4c33SKohei Kaigai do { 8020f7e4c33SKohei Kaigai c1 = *r++; 8030f7e4c33SKohei Kaigai if (c1 == '+') 8040f7e4c33SKohei Kaigai c1 = ' '; 8050f7e4c33SKohei Kaigai else if (c1 == '%') { 806af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 807af7ff2c2SAndy Shevchenko if (c1 < 0) 8080f7e4c33SKohei Kaigai goto out; 809af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 810af7ff2c2SAndy Shevchenko if (c2 < 0) 8110f7e4c33SKohei Kaigai goto out; 8120f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 8130f7e4c33SKohei Kaigai } 8140f7e4c33SKohei Kaigai *w++ = c1; 8150f7e4c33SKohei Kaigai } while (c1 != '\0'); 8160f7e4c33SKohei Kaigai 817f50a3ec9SKohei Kaigai objname = namebuf; 8180f7e4c33SKohei Kaigai } 819f50a3ec9SKohei Kaigai 82044be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 821b77a493bSEric Paris if (length) 822b77a493bSEric Paris goto out; 823b77a493bSEric Paris 82444be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 825b77a493bSEric Paris if (length) 826b77a493bSEric Paris goto out; 8271da177e4SLinus Torvalds 828f50a3ec9SKohei Kaigai length = security_transition_sid_user(ssid, tsid, tclass, 829f50a3ec9SKohei Kaigai objname, &newsid); 830b77a493bSEric Paris if (length) 831b77a493bSEric Paris goto out; 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 834b77a493bSEric Paris if (length) 835b77a493bSEric Paris goto out; 8361da177e4SLinus Torvalds 837b77a493bSEric Paris length = -ERANGE; 8381da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 839744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 840744ba35eSEric Paris "payload max\n", __func__, len); 841b77a493bSEric Paris goto out; 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds memcpy(buf, newcon, len); 8451da177e4SLinus Torvalds length = len; 8461da177e4SLinus Torvalds out: 847b77a493bSEric Paris kfree(newcon); 848f50a3ec9SKohei Kaigai kfree(namebuf); 849b77a493bSEric Paris kfree(tcon); 8501da177e4SLinus Torvalds kfree(scon); 8511da177e4SLinus Torvalds return length; 8521da177e4SLinus Torvalds } 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 8551da177e4SLinus Torvalds { 856b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 8571da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8581da177e4SLinus Torvalds u16 tclass; 8591da177e4SLinus Torvalds ssize_t length; 860b77a493bSEric Paris char *newcon = NULL; 8611da177e4SLinus Torvalds u32 len; 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 8641da177e4SLinus Torvalds if (length) 865b77a493bSEric Paris goto out; 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds length = -ENOMEM; 86889d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8691da177e4SLinus Torvalds if (!scon) 870b77a493bSEric Paris goto out; 8711da177e4SLinus Torvalds 872b77a493bSEric Paris length = -ENOMEM; 87389d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8741da177e4SLinus Torvalds if (!tcon) 8751da177e4SLinus Torvalds goto out; 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds length = -EINVAL; 8781da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 879b77a493bSEric Paris goto out; 8801da177e4SLinus Torvalds 88144be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 882b77a493bSEric Paris if (length) 883b77a493bSEric Paris goto out; 884b77a493bSEric Paris 88544be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 886b77a493bSEric Paris if (length) 887b77a493bSEric Paris goto out; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 890b77a493bSEric Paris if (length) 891b77a493bSEric Paris goto out; 8921da177e4SLinus Torvalds 8931da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 894b77a493bSEric Paris if (length) 895b77a493bSEric Paris goto out; 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds length = -ERANGE; 898b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 899b77a493bSEric Paris goto out; 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds memcpy(buf, newcon, len); 9021da177e4SLinus Torvalds length = len; 9031da177e4SLinus Torvalds out: 904b77a493bSEric Paris kfree(newcon); 905b77a493bSEric Paris kfree(tcon); 9061da177e4SLinus Torvalds kfree(scon); 9071da177e4SLinus Torvalds return length; 9081da177e4SLinus Torvalds } 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 9111da177e4SLinus Torvalds { 912b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 913b77a493bSEric Paris u32 sid, *sids = NULL; 9141da177e4SLinus Torvalds ssize_t length; 9151da177e4SLinus Torvalds char *newcon; 9161da177e4SLinus Torvalds int i, rc; 9171da177e4SLinus Torvalds u32 len, nsids; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 9201da177e4SLinus Torvalds if (length) 9216eab04a8SJustin P. Mattock goto out; 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds length = -ENOMEM; 92489d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 9251da177e4SLinus Torvalds if (!con) 9266eab04a8SJustin P. Mattock goto out; 9271da177e4SLinus Torvalds 928b77a493bSEric Paris length = -ENOMEM; 92989d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 9301da177e4SLinus Torvalds if (!user) 9311da177e4SLinus Torvalds goto out; 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds length = -EINVAL; 9341da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 935b77a493bSEric Paris goto out; 9361da177e4SLinus Torvalds 93744be2f65SRasmus Villemoes length = security_context_str_to_sid(con, &sid, GFP_KERNEL); 938b77a493bSEric Paris if (length) 939b77a493bSEric Paris goto out; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 942b77a493bSEric Paris if (length) 943b77a493bSEric Paris goto out; 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 9461da177e4SLinus Torvalds ptr = buf + length; 9471da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 9481da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 9491da177e4SLinus Torvalds if (rc) { 9501da177e4SLinus Torvalds length = rc; 951b77a493bSEric Paris goto out; 9521da177e4SLinus Torvalds } 9531da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 9541da177e4SLinus Torvalds kfree(newcon); 9551da177e4SLinus Torvalds length = -ERANGE; 956b77a493bSEric Paris goto out; 9571da177e4SLinus Torvalds } 9581da177e4SLinus Torvalds memcpy(ptr, newcon, len); 9591da177e4SLinus Torvalds kfree(newcon); 9601da177e4SLinus Torvalds ptr += len; 9611da177e4SLinus Torvalds length += len; 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds out: 964b77a493bSEric Paris kfree(sids); 965b77a493bSEric Paris kfree(user); 9661da177e4SLinus Torvalds kfree(con); 9671da177e4SLinus Torvalds return length; 9681da177e4SLinus Torvalds } 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 9711da177e4SLinus Torvalds { 972b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9731da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9741da177e4SLinus Torvalds u16 tclass; 9751da177e4SLinus Torvalds ssize_t length; 976b77a493bSEric Paris char *newcon = NULL; 9771da177e4SLinus Torvalds u32 len; 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 9801da177e4SLinus Torvalds if (length) 981b77a493bSEric Paris goto out; 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds length = -ENOMEM; 98489d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9851da177e4SLinus Torvalds if (!scon) 9866eab04a8SJustin P. Mattock goto out; 9871da177e4SLinus Torvalds 988b77a493bSEric Paris length = -ENOMEM; 98989d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9901da177e4SLinus Torvalds if (!tcon) 9911da177e4SLinus Torvalds goto out; 9921da177e4SLinus Torvalds 9931da177e4SLinus Torvalds length = -EINVAL; 9941da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 995b77a493bSEric Paris goto out; 9961da177e4SLinus Torvalds 99744be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 998b77a493bSEric Paris if (length) 999b77a493bSEric Paris goto out; 1000b77a493bSEric Paris 100144be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 1002b77a493bSEric Paris if (length) 1003b77a493bSEric Paris goto out; 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 1006b77a493bSEric Paris if (length) 1007b77a493bSEric Paris goto out; 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 1010b77a493bSEric Paris if (length) 1011b77a493bSEric Paris goto out; 10121da177e4SLinus Torvalds 1013b77a493bSEric Paris length = -ERANGE; 10141da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1015744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 1016744ba35eSEric Paris "payload max\n", __func__, len); 1017b77a493bSEric Paris goto out; 10181da177e4SLinus Torvalds } 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds memcpy(buf, newcon, len); 10211da177e4SLinus Torvalds length = len; 10221da177e4SLinus Torvalds out: 1023b77a493bSEric Paris kfree(newcon); 1024b77a493bSEric Paris kfree(tcon); 10251da177e4SLinus Torvalds kfree(scon); 10261da177e4SLinus Torvalds return length; 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 10301da177e4SLinus Torvalds { 10311da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 10321da177e4SLinus Torvalds 10331da177e4SLinus Torvalds if (ret) { 10341da177e4SLinus Torvalds ret->i_mode = mode; 10351da177e4SLinus Torvalds ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds return ret; 10381da177e4SLinus Torvalds } 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 10411da177e4SLinus Torvalds size_t count, loff_t *ppos) 10421da177e4SLinus Torvalds { 10431da177e4SLinus Torvalds char *page = NULL; 10441da177e4SLinus Torvalds ssize_t length; 10451da177e4SLinus Torvalds ssize_t ret; 10461da177e4SLinus Torvalds int cur_enforcing; 1047496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1048d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 10491da177e4SLinus Torvalds 1050bb003079SIngo Molnar mutex_lock(&sel_mutex); 10511da177e4SLinus Torvalds 1052d313f948SStephen Smalley ret = -EINVAL; 1053b77a493bSEric Paris if (index >= bool_num || strcmp(name, bool_pending_names[index])) 1054d313f948SStephen Smalley goto out; 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds ret = -ENOMEM; 1057b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1058b77a493bSEric Paris if (!page) 10591da177e4SLinus Torvalds goto out; 10601da177e4SLinus Torvalds 1061d313f948SStephen Smalley cur_enforcing = security_get_bool_value(index); 10621da177e4SLinus Torvalds if (cur_enforcing < 0) { 10631da177e4SLinus Torvalds ret = cur_enforcing; 10641da177e4SLinus Torvalds goto out; 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 1067d313f948SStephen Smalley bool_pending_values[index]); 106868bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 10691da177e4SLinus Torvalds out: 1070bb003079SIngo Molnar mutex_unlock(&sel_mutex); 10711da177e4SLinus Torvalds free_page((unsigned long)page); 10721da177e4SLinus Torvalds return ret; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 10761da177e4SLinus Torvalds size_t count, loff_t *ppos) 10771da177e4SLinus Torvalds { 10781da177e4SLinus Torvalds char *page = NULL; 1079d313f948SStephen Smalley ssize_t length; 10801da177e4SLinus Torvalds int new_value; 1081496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1082d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 10831da177e4SLinus Torvalds 1084bb003079SIngo Molnar mutex_lock(&sel_mutex); 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 10871da177e4SLinus Torvalds if (length) 10881da177e4SLinus Torvalds goto out; 10891da177e4SLinus Torvalds 1090d313f948SStephen Smalley length = -EINVAL; 1091b77a493bSEric Paris if (index >= bool_num || strcmp(name, bool_pending_names[index])) 1092d313f948SStephen Smalley goto out; 1093d313f948SStephen Smalley 10941da177e4SLinus Torvalds length = -ENOMEM; 1095b77a493bSEric Paris if (count >= PAGE_SIZE) 10961da177e4SLinus Torvalds goto out; 1097d313f948SStephen Smalley 10981da177e4SLinus Torvalds /* No partial writes. */ 1099d313f948SStephen Smalley length = -EINVAL; 1100b77a493bSEric Paris if (*ppos != 0) 11011da177e4SLinus Torvalds goto out; 1102b77a493bSEric Paris 11031da177e4SLinus Torvalds length = -ENOMEM; 1104b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1105b77a493bSEric Paris if (!page) 11061da177e4SLinus Torvalds goto out; 11071da177e4SLinus Torvalds 1108d313f948SStephen Smalley length = -EFAULT; 11091da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 11101da177e4SLinus Torvalds goto out; 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds length = -EINVAL; 11131da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 11141da177e4SLinus Torvalds goto out; 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds if (new_value) 11171da177e4SLinus Torvalds new_value = 1; 11181da177e4SLinus Torvalds 1119d313f948SStephen Smalley bool_pending_values[index] = new_value; 11201da177e4SLinus Torvalds length = count; 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds out: 1123bb003079SIngo Molnar mutex_unlock(&sel_mutex); 11241da177e4SLinus Torvalds free_page((unsigned long) page); 11251da177e4SLinus Torvalds return length; 11261da177e4SLinus Torvalds } 11271da177e4SLinus Torvalds 11289c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 11291da177e4SLinus Torvalds .read = sel_read_bool, 11301da177e4SLinus Torvalds .write = sel_write_bool, 113157a62c23SArnd Bergmann .llseek = generic_file_llseek, 11321da177e4SLinus Torvalds }; 11331da177e4SLinus Torvalds 11341da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 11351da177e4SLinus Torvalds const char __user *buf, 11361da177e4SLinus Torvalds size_t count, loff_t *ppos) 11371da177e4SLinus Torvalds { 11381da177e4SLinus Torvalds char *page = NULL; 1139d313f948SStephen Smalley ssize_t length; 11401da177e4SLinus Torvalds int new_value; 11411da177e4SLinus Torvalds 1142bb003079SIngo Molnar mutex_lock(&sel_mutex); 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 11451da177e4SLinus Torvalds if (length) 11461da177e4SLinus Torvalds goto out; 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds length = -ENOMEM; 1149b77a493bSEric Paris if (count >= PAGE_SIZE) 11501da177e4SLinus Torvalds goto out; 1151b77a493bSEric Paris 11521da177e4SLinus Torvalds /* No partial writes. */ 1153b77a493bSEric Paris length = -EINVAL; 1154b77a493bSEric Paris if (*ppos != 0) 11551da177e4SLinus Torvalds goto out; 1156b77a493bSEric Paris 11571da177e4SLinus Torvalds length = -ENOMEM; 1158b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1159b77a493bSEric Paris if (!page) 11601da177e4SLinus Torvalds goto out; 11611da177e4SLinus Torvalds 1162d313f948SStephen Smalley length = -EFAULT; 11631da177e4SLinus Torvalds if (copy_from_user(page, buf, count)) 11641da177e4SLinus Torvalds goto out; 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds length = -EINVAL; 11671da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 11681da177e4SLinus Torvalds goto out; 11691da177e4SLinus Torvalds 1170b77a493bSEric Paris length = 0; 11711872981bSEric Paris if (new_value && bool_pending_values) 1172b77a493bSEric Paris length = security_set_bools(bool_num, bool_pending_values); 11731da177e4SLinus Torvalds 1174b77a493bSEric Paris if (!length) 11751da177e4SLinus Torvalds length = count; 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds out: 1178bb003079SIngo Molnar mutex_unlock(&sel_mutex); 11791da177e4SLinus Torvalds free_page((unsigned long) page); 11801da177e4SLinus Torvalds return length; 11811da177e4SLinus Torvalds } 11821da177e4SLinus Torvalds 11839c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 11841da177e4SLinus Torvalds .write = sel_commit_bools_write, 118557a62c23SArnd Bergmann .llseek = generic_file_llseek, 11861da177e4SLinus Torvalds }; 11871da177e4SLinus Torvalds 11880c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 11891da177e4SLinus Torvalds { 1190ad52184bSAl Viro d_genocide(de); 1191ad52184bSAl Viro shrink_dcache_parent(de); 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds static int sel_make_bools(void) 11971da177e4SLinus Torvalds { 1198b77a493bSEric Paris int i, ret; 11991da177e4SLinus Torvalds ssize_t len; 12001da177e4SLinus Torvalds struct dentry *dentry = NULL; 12011da177e4SLinus Torvalds struct dentry *dir = bool_dir; 12021da177e4SLinus Torvalds struct inode *inode = NULL; 12031da177e4SLinus Torvalds struct inode_security_struct *isec; 12041da177e4SLinus Torvalds char **names = NULL, *page; 12051da177e4SLinus Torvalds int num; 12061da177e4SLinus Torvalds int *values = NULL; 12071da177e4SLinus Torvalds u32 sid; 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds /* remove any existing files */ 12108007f102SXiaotian Feng for (i = 0; i < bool_num; i++) 12118007f102SXiaotian Feng kfree(bool_pending_names[i]); 1212d313f948SStephen Smalley kfree(bool_pending_names); 12131da177e4SLinus Torvalds kfree(bool_pending_values); 1214154c50caSEric Paris bool_num = 0; 1215d313f948SStephen Smalley bool_pending_names = NULL; 121620c19e41SDavi Arnaut bool_pending_values = NULL; 12171da177e4SLinus Torvalds 12180c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 12191da177e4SLinus Torvalds 1220b77a493bSEric Paris ret = -ENOMEM; 12211872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 12221872981bSEric Paris if (!page) 1223b77a493bSEric Paris goto out; 12241da177e4SLinus Torvalds 12251da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 1226b77a493bSEric Paris if (ret) 12271da177e4SLinus Torvalds goto out; 12281da177e4SLinus Torvalds 12291da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1230b77a493bSEric Paris ret = -ENOMEM; 12311da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1232b77a493bSEric Paris if (!dentry) 1233b77a493bSEric Paris goto out; 12341da177e4SLinus Torvalds 1235b77a493bSEric Paris ret = -ENOMEM; 1236b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 1237b77a493bSEric Paris if (!inode) 1238b77a493bSEric Paris goto out; 1239b77a493bSEric Paris 12401da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1241cc1dad71SAl Viro len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 1242b77a493bSEric Paris if (len >= PAGE_SIZE) 1243b77a493bSEric Paris goto out; 1244b77a493bSEric Paris 12451da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 12461872981bSEric Paris ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); 12471872981bSEric Paris if (ret) 1248b77a493bSEric Paris goto out; 1249b77a493bSEric Paris 12501da177e4SLinus Torvalds isec->sid = sid; 12511da177e4SLinus Torvalds isec->initialized = 1; 12521da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1253bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 12541da177e4SLinus Torvalds d_add(dentry, inode); 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds bool_num = num; 1257d313f948SStephen Smalley bool_pending_names = names; 12581da177e4SLinus Torvalds bool_pending_values = values; 1259b77a493bSEric Paris 1260b77a493bSEric Paris free_page((unsigned long)page); 1261b77a493bSEric Paris return 0; 12621da177e4SLinus Torvalds out: 12631da177e4SLinus Torvalds free_page((unsigned long)page); 1264b77a493bSEric Paris 12651da177e4SLinus Torvalds if (names) { 12669a5f04bfSJesper Juhl for (i = 0; i < num; i++) 12671da177e4SLinus Torvalds kfree(names[i]); 12681da177e4SLinus Torvalds kfree(names); 12691da177e4SLinus Torvalds } 127020c19e41SDavi Arnaut kfree(values); 12710c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1272b77a493bSEric Paris 1273b77a493bSEric Paris return ret; 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 12771da177e4SLinus Torvalds 1278765927b2SAl Viro struct path selinux_null; 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 12811da177e4SLinus Torvalds size_t count, loff_t *ppos) 12821da177e4SLinus Torvalds { 12831da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 12841da177e4SLinus Torvalds ssize_t length; 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 12871da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 12881da177e4SLinus Torvalds } 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 12911da177e4SLinus Torvalds const char __user *buf, 12921da177e4SLinus Torvalds size_t count, loff_t *ppos) 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds { 1295b77a493bSEric Paris char *page = NULL; 12961da177e4SLinus Torvalds ssize_t ret; 12971da177e4SLinus Torvalds int new_value; 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 13001da177e4SLinus Torvalds if (ret) 1301b77a493bSEric Paris goto out; 1302b77a493bSEric Paris 1303b77a493bSEric Paris ret = -ENOMEM; 1304b77a493bSEric Paris if (count >= PAGE_SIZE) 1305b77a493bSEric Paris goto out; 1306b77a493bSEric Paris 1307b77a493bSEric Paris /* No partial writes. */ 1308b77a493bSEric Paris ret = -EINVAL; 1309b77a493bSEric Paris if (*ppos != 0) 1310b77a493bSEric Paris goto out; 1311b77a493bSEric Paris 1312b77a493bSEric Paris ret = -ENOMEM; 1313b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1314b77a493bSEric Paris if (!page) 1315b77a493bSEric Paris goto out; 1316b77a493bSEric Paris 1317b77a493bSEric Paris ret = -EFAULT; 1318b77a493bSEric Paris if (copy_from_user(page, buf, count)) 1319b77a493bSEric Paris goto out; 1320b77a493bSEric Paris 1321b77a493bSEric Paris ret = -EINVAL; 1322b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1323b77a493bSEric Paris goto out; 1324b77a493bSEric Paris 13251da177e4SLinus Torvalds avc_cache_threshold = new_value; 1326b77a493bSEric Paris 13271da177e4SLinus Torvalds ret = count; 13281da177e4SLinus Torvalds out: 1329b77a493bSEric Paris free_page((unsigned long)page); 13301da177e4SLinus Torvalds return ret; 13311da177e4SLinus Torvalds } 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 13341da177e4SLinus Torvalds size_t count, loff_t *ppos) 13351da177e4SLinus Torvalds { 13361da177e4SLinus Torvalds char *page; 1337b77a493bSEric Paris ssize_t length; 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1340b77a493bSEric Paris if (!page) 1341b77a493bSEric Paris return -ENOMEM; 1342b77a493bSEric Paris 1343b77a493bSEric Paris length = avc_get_hash_stats(page); 1344b77a493bSEric Paris if (length >= 0) 1345b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 13461da177e4SLinus Torvalds free_page((unsigned long)page); 1347b77a493bSEric Paris 1348b77a493bSEric Paris return length; 13491da177e4SLinus Torvalds } 13501da177e4SLinus Torvalds 13519c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 13521da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 13531da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 135457a62c23SArnd Bergmann .llseek = generic_file_llseek, 13551da177e4SLinus Torvalds }; 13561da177e4SLinus Torvalds 13579c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 13581da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 135957a62c23SArnd Bergmann .llseek = generic_file_llseek, 13601da177e4SLinus Torvalds }; 13611da177e4SLinus Torvalds 13621da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 13631da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 13641da177e4SLinus Torvalds { 13651da177e4SLinus Torvalds int cpu; 13661da177e4SLinus Torvalds 13674f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 13681da177e4SLinus Torvalds if (!cpu_possible(cpu)) 13691da177e4SLinus Torvalds continue; 13701da177e4SLinus Torvalds *idx = cpu + 1; 13711da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds return NULL; 13741da177e4SLinus Torvalds } 13751da177e4SLinus Torvalds 13761da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 13771da177e4SLinus Torvalds { 13781da177e4SLinus Torvalds loff_t n = *pos - 1; 13791da177e4SLinus Torvalds 13801da177e4SLinus Torvalds if (*pos == 0) 13811da177e4SLinus Torvalds return SEQ_START_TOKEN; 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 13841da177e4SLinus Torvalds } 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 13871da177e4SLinus Torvalds { 13881da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 13891da177e4SLinus Torvalds } 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 13921da177e4SLinus Torvalds { 13931da177e4SLinus Torvalds struct avc_cache_stats *st = v; 13941da177e4SLinus Torvalds 13951da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 13961da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 13971da177e4SLinus Torvalds "frees\n"); 1398257313b2SLinus Torvalds else { 1399257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1400257313b2SLinus Torvalds unsigned int misses = st->misses; 1401257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1402257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1403257313b2SLinus Torvalds hits, misses, st->allocations, 14041da177e4SLinus Torvalds st->reclaims, st->frees); 1405257313b2SLinus Torvalds } 14061da177e4SLinus Torvalds return 0; 14071da177e4SLinus Torvalds } 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 14101da177e4SLinus Torvalds { } 14111da177e4SLinus Torvalds 14121996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 14131da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 14141da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 14151da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 14161da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 14171da177e4SLinus Torvalds }; 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 14201da177e4SLinus Torvalds { 14211da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 14221da177e4SLinus Torvalds } 14231da177e4SLinus Torvalds 14249c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 14251da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 14261da177e4SLinus Torvalds .read = seq_read, 14271da177e4SLinus Torvalds .llseek = seq_lseek, 14281da177e4SLinus Torvalds .release = seq_release, 14291da177e4SLinus Torvalds }; 14301da177e4SLinus Torvalds #endif 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 14331da177e4SLinus Torvalds { 1434b77a493bSEric Paris int i; 14351da177e4SLinus Torvalds static struct tree_descr files[] = { 14361da177e4SLinus Torvalds { "cache_threshold", 14371da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 14381da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 14391da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 14401da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 14411da177e4SLinus Torvalds #endif 14421da177e4SLinus Torvalds }; 14431da177e4SLinus Torvalds 14446e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 14451da177e4SLinus Torvalds struct inode *inode; 14461da177e4SLinus Torvalds struct dentry *dentry; 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1449b77a493bSEric Paris if (!dentry) 1450b77a493bSEric Paris return -ENOMEM; 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 1453b77a493bSEric Paris if (!inode) 1454b77a493bSEric Paris return -ENOMEM; 1455b77a493bSEric Paris 14561da177e4SLinus Torvalds inode->i_fop = files[i].ops; 14576174eafcSJames Carter inode->i_ino = ++sel_last_ino; 14581da177e4SLinus Torvalds d_add(dentry, inode); 14591da177e4SLinus Torvalds } 1460b77a493bSEric Paris 1461b77a493bSEric Paris return 0; 14621da177e4SLinus Torvalds } 14631da177e4SLinus Torvalds 1464f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1465f0ee2e46SJames Carter size_t count, loff_t *ppos) 1466f0ee2e46SJames Carter { 1467f0ee2e46SJames Carter char *con; 1468f0ee2e46SJames Carter u32 sid, len; 1469f0ee2e46SJames Carter ssize_t ret; 1470f0ee2e46SJames Carter 1471496ad9aaSAl Viro sid = file_inode(file)->i_ino&SEL_INO_MASK; 1472f0ee2e46SJames Carter ret = security_sid_to_context(sid, &con, &len); 1473b77a493bSEric Paris if (ret) 1474f0ee2e46SJames Carter return ret; 1475f0ee2e46SJames Carter 1476f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1477f0ee2e46SJames Carter kfree(con); 1478f0ee2e46SJames Carter return ret; 1479f0ee2e46SJames Carter } 1480f0ee2e46SJames Carter 1481f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1482f0ee2e46SJames Carter .read = sel_read_initcon, 148357a62c23SArnd Bergmann .llseek = generic_file_llseek, 1484f0ee2e46SJames Carter }; 1485f0ee2e46SJames Carter 1486f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1487f0ee2e46SJames Carter { 1488b77a493bSEric Paris int i; 1489f0ee2e46SJames Carter 1490f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1491f0ee2e46SJames Carter struct inode *inode; 1492f0ee2e46SJames Carter struct dentry *dentry; 1493f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1494b77a493bSEric Paris if (!dentry) 1495b77a493bSEric Paris return -ENOMEM; 1496f0ee2e46SJames Carter 1497f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1498b77a493bSEric Paris if (!inode) 1499b77a493bSEric Paris return -ENOMEM; 1500b77a493bSEric Paris 1501f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1502f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1503f0ee2e46SJames Carter d_add(dentry, inode); 1504f0ee2e46SJames Carter } 1505b77a493bSEric Paris 1506b77a493bSEric Paris return 0; 1507f0ee2e46SJames Carter } 1508f0ee2e46SJames Carter 1509e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1510e47c8fc5SChristopher J. PeBenito { 1511e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1512e47c8fc5SChristopher J. PeBenito } 1513e47c8fc5SChristopher J. PeBenito 1514e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1515e47c8fc5SChristopher J. PeBenito { 151692ae9e82SEric Paris return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); 1517e47c8fc5SChristopher J. PeBenito } 1518e47c8fc5SChristopher J. PeBenito 1519e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1520e47c8fc5SChristopher J. PeBenito { 1521e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1522e47c8fc5SChristopher J. PeBenito } 1523e47c8fc5SChristopher J. PeBenito 1524e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1525e47c8fc5SChristopher J. PeBenito { 1526e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1527e47c8fc5SChristopher J. PeBenito } 1528e47c8fc5SChristopher J. PeBenito 1529e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1530e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1531e47c8fc5SChristopher J. PeBenito { 1532496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1533cc1dad71SAl Viro char res[TMPBUFLEN]; 1534cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); 1535cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1536e47c8fc5SChristopher J. PeBenito } 1537e47c8fc5SChristopher J. PeBenito 1538e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1539e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 154057a62c23SArnd Bergmann .llseek = generic_file_llseek, 1541e47c8fc5SChristopher J. PeBenito }; 1542e47c8fc5SChristopher J. PeBenito 1543e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1544e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1545e47c8fc5SChristopher J. PeBenito { 1546496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1547cc1dad71SAl Viro char res[TMPBUFLEN]; 1548cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); 1549cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1550e47c8fc5SChristopher J. PeBenito } 1551e47c8fc5SChristopher J. PeBenito 1552e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1553e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 155457a62c23SArnd Bergmann .llseek = generic_file_llseek, 1555e47c8fc5SChristopher J. PeBenito }; 1556e47c8fc5SChristopher J. PeBenito 15573bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 15583bb56b25SPaul Moore size_t count, loff_t *ppos) 15593bb56b25SPaul Moore { 15603bb56b25SPaul Moore int value; 15613bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 15623bb56b25SPaul Moore ssize_t length; 1563496ad9aaSAl Viro unsigned long i_ino = file_inode(file)->i_ino; 15643bb56b25SPaul Moore 15653bb56b25SPaul Moore value = security_policycap_supported(i_ino & SEL_INO_MASK); 15663bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 15673bb56b25SPaul Moore 15683bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 15693bb56b25SPaul Moore } 15703bb56b25SPaul Moore 15713bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 15723bb56b25SPaul Moore .read = sel_read_policycap, 157357a62c23SArnd Bergmann .llseek = generic_file_llseek, 15743bb56b25SPaul Moore }; 15753bb56b25SPaul Moore 1576e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1577e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1578e47c8fc5SChristopher J. PeBenito { 1579b77a493bSEric Paris int i, rc, nperms; 1580e47c8fc5SChristopher J. PeBenito char **perms; 1581e47c8fc5SChristopher J. PeBenito 1582e47c8fc5SChristopher J. PeBenito rc = security_get_permissions(objclass, &perms, &nperms); 1583e47c8fc5SChristopher J. PeBenito if (rc) 1584b77a493bSEric Paris return rc; 1585e47c8fc5SChristopher J. PeBenito 1586e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1587e47c8fc5SChristopher J. PeBenito struct inode *inode; 1588e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1589e47c8fc5SChristopher J. PeBenito 1590b77a493bSEric Paris rc = -ENOMEM; 1591e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1592b77a493bSEric Paris if (!dentry) 1593b77a493bSEric Paris goto out; 1594e47c8fc5SChristopher J. PeBenito 1595e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1596b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1597b77a493bSEric Paris if (!inode) 1598b77a493bSEric Paris goto out; 1599b77a493bSEric Paris 1600e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1601e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1602e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1603e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1604e47c8fc5SChristopher J. PeBenito } 1605b77a493bSEric Paris rc = 0; 1606b77a493bSEric Paris out: 1607e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1608e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1609e47c8fc5SChristopher J. PeBenito kfree(perms); 1610e47c8fc5SChristopher J. PeBenito return rc; 1611e47c8fc5SChristopher J. PeBenito } 1612e47c8fc5SChristopher J. PeBenito 1613e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1614e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1615e47c8fc5SChristopher J. PeBenito { 1616e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1617e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1618e47c8fc5SChristopher J. PeBenito int rc; 1619e47c8fc5SChristopher J. PeBenito 1620e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1621b77a493bSEric Paris if (!dentry) 1622b77a493bSEric Paris return -ENOMEM; 1623e47c8fc5SChristopher J. PeBenito 1624e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1625b77a493bSEric Paris if (!inode) 1626b77a493bSEric Paris return -ENOMEM; 1627e47c8fc5SChristopher J. PeBenito 1628e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1629e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1630e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1631e47c8fc5SChristopher J. PeBenito 1632a1c2aa1eSAl Viro dentry = sel_make_dir(dir, "perms", &last_class_ino); 1633a1c2aa1eSAl Viro if (IS_ERR(dentry)) 1634a1c2aa1eSAl Viro return PTR_ERR(dentry); 1635e47c8fc5SChristopher J. PeBenito 1636e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1637e47c8fc5SChristopher J. PeBenito 1638e47c8fc5SChristopher J. PeBenito return rc; 1639e47c8fc5SChristopher J. PeBenito } 1640e47c8fc5SChristopher J. PeBenito 1641e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void) 1642e47c8fc5SChristopher J. PeBenito { 1643b77a493bSEric Paris int rc, nclasses, i; 1644e47c8fc5SChristopher J. PeBenito char **classes; 1645e47c8fc5SChristopher J. PeBenito 1646e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 1647ad52184bSAl Viro sel_remove_entries(class_dir); 1648e47c8fc5SChristopher J. PeBenito 1649e47c8fc5SChristopher J. PeBenito rc = security_get_classes(&classes, &nclasses); 1650b77a493bSEric Paris if (rc) 1651b77a493bSEric Paris return rc; 1652e47c8fc5SChristopher J. PeBenito 1653e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 1654e47c8fc5SChristopher J. PeBenito last_class_ino = sel_class_to_ino(nclasses + 2); 1655e47c8fc5SChristopher J. PeBenito 1656e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1657e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1658e47c8fc5SChristopher J. PeBenito 1659a1c2aa1eSAl Viro class_name_dir = sel_make_dir(class_dir, classes[i], 1660e47c8fc5SChristopher J. PeBenito &last_class_ino); 1661a1c2aa1eSAl Viro if (IS_ERR(class_name_dir)) { 1662a1c2aa1eSAl Viro rc = PTR_ERR(class_name_dir); 1663b77a493bSEric Paris goto out; 1664a1c2aa1eSAl Viro } 1665e47c8fc5SChristopher J. PeBenito 1666e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1667e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1668e47c8fc5SChristopher J. PeBenito class_name_dir); 1669e47c8fc5SChristopher J. PeBenito if (rc) 1670b77a493bSEric Paris goto out; 1671e47c8fc5SChristopher J. PeBenito } 1672b77a493bSEric Paris rc = 0; 1673b77a493bSEric Paris out: 1674e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1675e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1676e47c8fc5SChristopher J. PeBenito kfree(classes); 1677e47c8fc5SChristopher J. PeBenito return rc; 1678e47c8fc5SChristopher J. PeBenito } 1679e47c8fc5SChristopher J. PeBenito 16803bb56b25SPaul Moore static int sel_make_policycap(void) 16813bb56b25SPaul Moore { 16823bb56b25SPaul Moore unsigned int iter; 16833bb56b25SPaul Moore struct dentry *dentry = NULL; 16843bb56b25SPaul Moore struct inode *inode = NULL; 16853bb56b25SPaul Moore 16863bb56b25SPaul Moore sel_remove_entries(policycap_dir); 16873bb56b25SPaul Moore 16883bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 16893bb56b25SPaul Moore if (iter < ARRAY_SIZE(policycap_names)) 16903bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, 16913bb56b25SPaul Moore policycap_names[iter]); 16923bb56b25SPaul Moore else 16933bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, "unknown"); 16943bb56b25SPaul Moore 16953bb56b25SPaul Moore if (dentry == NULL) 16963bb56b25SPaul Moore return -ENOMEM; 16973bb56b25SPaul Moore 16983bb56b25SPaul Moore inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); 16993bb56b25SPaul Moore if (inode == NULL) 17003bb56b25SPaul Moore return -ENOMEM; 17013bb56b25SPaul Moore 17023bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 17033bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 17043bb56b25SPaul Moore d_add(dentry, inode); 17053bb56b25SPaul Moore } 17063bb56b25SPaul Moore 17073bb56b25SPaul Moore return 0; 17083bb56b25SPaul Moore } 17093bb56b25SPaul Moore 1710a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 17110dd4ae51SChristopher J. PeBenito unsigned long *ino) 17121da177e4SLinus Torvalds { 1713a1c2aa1eSAl Viro struct dentry *dentry = d_alloc_name(dir, name); 17141da177e4SLinus Torvalds struct inode *inode; 17151da177e4SLinus Torvalds 1716a1c2aa1eSAl Viro if (!dentry) 1717a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1718a1c2aa1eSAl Viro 1719a1c2aa1eSAl Viro inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1720a1c2aa1eSAl Viro if (!inode) { 1721a1c2aa1eSAl Viro dput(dentry); 1722a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1723a1c2aa1eSAl Viro } 1724b77a493bSEric Paris 17251da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 17261da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 17270dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 172840e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1729d8c76e6fSDave Hansen inc_nlink(inode); 17301da177e4SLinus Torvalds d_add(dentry, inode); 1731edb20fb5SJames Morris /* bump link count on parent directory, too */ 1732ce0b16ddSDavid Howells inc_nlink(d_inode(dir)); 1733b77a493bSEric Paris 1734a1c2aa1eSAl Viro return dentry; 17351da177e4SLinus Torvalds } 17361da177e4SLinus Torvalds 17371da177e4SLinus Torvalds static int sel_fill_super(struct super_block *sb, void *data, int silent) 17381da177e4SLinus Torvalds { 17391da177e4SLinus Torvalds int ret; 17401da177e4SLinus Torvalds struct dentry *dentry; 1741a1c2aa1eSAl Viro struct inode *inode; 17421da177e4SLinus Torvalds struct inode_security_struct *isec; 17431da177e4SLinus Torvalds 17441da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 17451da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 17461da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1747ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 17481da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 17491da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 17501da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 17511da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 17521da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 17531da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 17541da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 17551da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 17561da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 17571da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 17583f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 17593f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 176011904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 176172e8c859SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, 17621da177e4SLinus Torvalds /* last one */ {""} 17631da177e4SLinus Torvalds }; 17641da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 17651da177e4SLinus Torvalds if (ret) 1766161ce45aSJames Morris goto err; 17671da177e4SLinus Torvalds 1768a1c2aa1eSAl Viro bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &sel_last_ino); 1769a1c2aa1eSAl Viro if (IS_ERR(bool_dir)) { 1770a1c2aa1eSAl Viro ret = PTR_ERR(bool_dir); 1771a1c2aa1eSAl Viro bool_dir = NULL; 1772161ce45aSJames Morris goto err; 1773a1c2aa1eSAl Viro } 17741da177e4SLinus Torvalds 1775b77a493bSEric Paris ret = -ENOMEM; 17761da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1777b77a493bSEric Paris if (!dentry) 1778161ce45aSJames Morris goto err; 17791da177e4SLinus Torvalds 1780161ce45aSJames Morris ret = -ENOMEM; 1781b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1782b77a493bSEric Paris if (!inode) 1783161ce45aSJames Morris goto err; 1784b77a493bSEric Paris 17856174eafcSJames Carter inode->i_ino = ++sel_last_ino; 17861da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 17871da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 17881da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 17891da177e4SLinus Torvalds isec->initialized = 1; 17901da177e4SLinus Torvalds 17911da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 17921da177e4SLinus Torvalds d_add(dentry, inode); 1793765927b2SAl Viro selinux_null.dentry = dentry; 17941da177e4SLinus Torvalds 1795a1c2aa1eSAl Viro dentry = sel_make_dir(sb->s_root, "avc", &sel_last_ino); 1796a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1797a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1798161ce45aSJames Morris goto err; 1799a1c2aa1eSAl Viro } 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 18021da177e4SLinus Torvalds if (ret) 1803161ce45aSJames Morris goto err; 1804f0ee2e46SJames Carter 1805a1c2aa1eSAl Viro dentry = sel_make_dir(sb->s_root, "initial_contexts", &sel_last_ino); 1806a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1807a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1808f0ee2e46SJames Carter goto err; 1809a1c2aa1eSAl Viro } 1810f0ee2e46SJames Carter 1811f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1812f0ee2e46SJames Carter if (ret) 1813f0ee2e46SJames Carter goto err; 1814f0ee2e46SJames Carter 1815a1c2aa1eSAl Viro class_dir = sel_make_dir(sb->s_root, "class", &sel_last_ino); 1816a1c2aa1eSAl Viro if (IS_ERR(class_dir)) { 1817a1c2aa1eSAl Viro ret = PTR_ERR(class_dir); 1818a1c2aa1eSAl Viro class_dir = NULL; 1819e47c8fc5SChristopher J. PeBenito goto err; 1820a1c2aa1eSAl Viro } 1821e47c8fc5SChristopher J. PeBenito 1822a1c2aa1eSAl Viro policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", &sel_last_ino); 1823a1c2aa1eSAl Viro if (IS_ERR(policycap_dir)) { 1824a1c2aa1eSAl Viro ret = PTR_ERR(policycap_dir); 1825a1c2aa1eSAl Viro policycap_dir = NULL; 1826e47c8fc5SChristopher J. PeBenito goto err; 1827a1c2aa1eSAl Viro } 1828b77a493bSEric Paris return 0; 1829161ce45aSJames Morris err: 1830744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", 1831744ba35eSEric Paris __func__); 1832b77a493bSEric Paris return ret; 18331da177e4SLinus Torvalds } 18341da177e4SLinus Torvalds 1835fc14f2feSAl Viro static struct dentry *sel_mount(struct file_system_type *fs_type, 1836fc14f2feSAl Viro int flags, const char *dev_name, void *data) 18371da177e4SLinus Torvalds { 1838fc14f2feSAl Viro return mount_single(fs_type, flags, data, sel_fill_super); 18391da177e4SLinus Torvalds } 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 18421da177e4SLinus Torvalds .name = "selinuxfs", 1843fc14f2feSAl Viro .mount = sel_mount, 18441da177e4SLinus Torvalds .kill_sb = kill_litter_super, 18451da177e4SLinus Torvalds }; 18461da177e4SLinus Torvalds 18471da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds static int __init init_sel_fs(void) 18501da177e4SLinus Torvalds { 18511da177e4SLinus Torvalds int err; 18521da177e4SLinus Torvalds 18531da177e4SLinus Torvalds if (!selinux_enabled) 18541da177e4SLinus Torvalds return 0; 18557a627e3bSGreg Kroah-Hartman 1856f9bb4882SEric W. Biederman err = sysfs_create_mount_point(fs_kobj, "selinux"); 1857f9bb4882SEric W. Biederman if (err) 1858f9bb4882SEric W. Biederman return err; 18597a627e3bSGreg Kroah-Hartman 18601da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 18617a627e3bSGreg Kroah-Hartman if (err) { 1862f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 1863b77a493bSEric Paris return err; 18647a627e3bSGreg Kroah-Hartman } 1865b77a493bSEric Paris 1866765927b2SAl Viro selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); 18671da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 18681da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 18691da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 18701da177e4SLinus Torvalds selinuxfs_mount = NULL; 18711da177e4SLinus Torvalds } 1872b77a493bSEric Paris 18731da177e4SLinus Torvalds return err; 18741da177e4SLinus Torvalds } 18751da177e4SLinus Torvalds 18761da177e4SLinus Torvalds __initcall(init_sel_fs); 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 18791da177e4SLinus Torvalds void exit_sel_fs(void) 18801da177e4SLinus Torvalds { 1881f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 1882423e0ab0STim Chen kern_unmount(selinuxfs_mount); 18831da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 18841da177e4SLinus Torvalds } 18851da177e4SLinus Torvalds #endif 1886