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 */ 119f9df6458SAndrew Perepechko SEL_VALIDATE_TRANS, /* compute validatetrans decision */ 1206174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 1211da177e4SLinus Torvalds }; 1221da177e4SLinus Torvalds 1236174eafcSJames Carter static unsigned long sel_last_ino = SEL_INO_NEXT - 1; 1246174eafcSJames Carter 125f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 126bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 127e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1283bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 129f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 130f0ee2e46SJames Carter 1311da177e4SLinus Torvalds #define TMPBUFLEN 12 1321da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1331da177e4SLinus Torvalds size_t count, loff_t *ppos) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1361da177e4SLinus Torvalds ssize_t length; 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); 1391da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1431da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1441da177e4SLinus Torvalds size_t count, loff_t *ppos) 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds { 147b77a493bSEric Paris char *page = NULL; 1481da177e4SLinus Torvalds ssize_t length; 1491da177e4SLinus Torvalds int new_value; 1501da177e4SLinus Torvalds 151bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1528365a719SAl Viro return -ENOMEM; 153b77a493bSEric Paris 1541da177e4SLinus Torvalds /* No partial writes. */ 155b77a493bSEric Paris if (*ppos != 0) 1568365a719SAl Viro return -EINVAL; 157b77a493bSEric Paris 1588365a719SAl Viro page = memdup_user_nul(buf, count); 1598365a719SAl Viro if (IS_ERR(page)) 1608365a719SAl Viro return PTR_ERR(page); 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds length = -EINVAL; 1631da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1641da177e4SLinus Torvalds goto out; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds if (new_value != selinux_enforcing) { 1671da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETENFORCE); 1681da177e4SLinus Torvalds if (length) 1691da177e4SLinus Torvalds goto out; 170af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 1714746ec5bSEric Paris "enforcing=%d old_enforcing=%d auid=%u ses=%u", 1724746ec5bSEric Paris new_value, selinux_enforcing, 173581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 1744746ec5bSEric Paris audit_get_sessionid(current)); 1751da177e4SLinus Torvalds selinux_enforcing = new_value; 1761da177e4SLinus Torvalds if (selinux_enforcing) 1771da177e4SLinus Torvalds avc_ss_reset(0); 1781da177e4SLinus Torvalds selnl_notify_setenforce(selinux_enforcing); 17911904167SKaiGai Kohei selinux_status_update_setenforce(selinux_enforcing); 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds length = count; 1821da177e4SLinus Torvalds out: 1838365a719SAl Viro kfree(page); 1841da177e4SLinus Torvalds return length; 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds #else 1871da177e4SLinus Torvalds #define sel_write_enforce NULL 1881da177e4SLinus Torvalds #endif 1891da177e4SLinus Torvalds 1909c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1911da177e4SLinus Torvalds .read = sel_read_enforce, 1921da177e4SLinus Torvalds .write = sel_write_enforce, 19357a62c23SArnd Bergmann .llseek = generic_file_llseek, 1941da177e4SLinus Torvalds }; 1951da177e4SLinus Torvalds 1963f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 1973f12070eSEric Paris size_t count, loff_t *ppos) 1983f12070eSEric Paris { 1993f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 2003f12070eSEric Paris ssize_t length; 201496ad9aaSAl Viro ino_t ino = file_inode(filp)->i_ino; 2023f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 2033f12070eSEric Paris security_get_reject_unknown() : !security_get_allow_unknown(); 2043f12070eSEric Paris 2053f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 2063f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2073f12070eSEric Paris } 2083f12070eSEric Paris 2093f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 2103f12070eSEric Paris .read = sel_read_handle_unknown, 21157a62c23SArnd Bergmann .llseek = generic_file_llseek, 2123f12070eSEric Paris }; 2133f12070eSEric Paris 21411904167SKaiGai Kohei static int sel_open_handle_status(struct inode *inode, struct file *filp) 21511904167SKaiGai Kohei { 21611904167SKaiGai Kohei struct page *status = selinux_kernel_status_page(); 21711904167SKaiGai Kohei 21811904167SKaiGai Kohei if (!status) 21911904167SKaiGai Kohei return -ENOMEM; 22011904167SKaiGai Kohei 22111904167SKaiGai Kohei filp->private_data = status; 22211904167SKaiGai Kohei 22311904167SKaiGai Kohei return 0; 22411904167SKaiGai Kohei } 22511904167SKaiGai Kohei 22611904167SKaiGai Kohei static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, 22711904167SKaiGai Kohei size_t count, loff_t *ppos) 22811904167SKaiGai Kohei { 22911904167SKaiGai Kohei struct page *status = filp->private_data; 23011904167SKaiGai Kohei 23111904167SKaiGai Kohei BUG_ON(!status); 23211904167SKaiGai Kohei 23311904167SKaiGai Kohei return simple_read_from_buffer(buf, count, ppos, 23411904167SKaiGai Kohei page_address(status), 23511904167SKaiGai Kohei sizeof(struct selinux_kernel_status)); 23611904167SKaiGai Kohei } 23711904167SKaiGai Kohei 23811904167SKaiGai Kohei static int sel_mmap_handle_status(struct file *filp, 23911904167SKaiGai Kohei struct vm_area_struct *vma) 24011904167SKaiGai Kohei { 24111904167SKaiGai Kohei struct page *status = filp->private_data; 24211904167SKaiGai Kohei unsigned long size = vma->vm_end - vma->vm_start; 24311904167SKaiGai Kohei 24411904167SKaiGai Kohei BUG_ON(!status); 24511904167SKaiGai Kohei 24611904167SKaiGai Kohei /* only allows one page from the head */ 24711904167SKaiGai Kohei if (vma->vm_pgoff > 0 || size != PAGE_SIZE) 24811904167SKaiGai Kohei return -EIO; 24911904167SKaiGai Kohei /* disallow writable mapping */ 25011904167SKaiGai Kohei if (vma->vm_flags & VM_WRITE) 25111904167SKaiGai Kohei return -EPERM; 25211904167SKaiGai Kohei /* disallow mprotect() turns it into writable */ 25311904167SKaiGai Kohei vma->vm_flags &= ~VM_MAYWRITE; 25411904167SKaiGai Kohei 25511904167SKaiGai Kohei return remap_pfn_range(vma, vma->vm_start, 25611904167SKaiGai Kohei page_to_pfn(status), 25711904167SKaiGai Kohei size, vma->vm_page_prot); 25811904167SKaiGai Kohei } 25911904167SKaiGai Kohei 26011904167SKaiGai Kohei static const struct file_operations sel_handle_status_ops = { 26111904167SKaiGai Kohei .open = sel_open_handle_status, 26211904167SKaiGai Kohei .read = sel_read_handle_status, 26311904167SKaiGai Kohei .mmap = sel_mmap_handle_status, 26411904167SKaiGai Kohei .llseek = generic_file_llseek, 26511904167SKaiGai Kohei }; 26611904167SKaiGai Kohei 2671da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2681da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file *file, const char __user *buf, 2691da177e4SLinus Torvalds size_t count, loff_t *ppos) 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds { 2728365a719SAl Viro char *page; 2731da177e4SLinus Torvalds ssize_t length; 2741da177e4SLinus Torvalds int new_value; 2751da177e4SLinus Torvalds 276bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2778365a719SAl Viro return -ENOMEM; 278b77a493bSEric Paris 2791da177e4SLinus Torvalds /* No partial writes. */ 280b77a493bSEric Paris if (*ppos != 0) 2818365a719SAl Viro return -EINVAL; 282b77a493bSEric Paris 2838365a719SAl Viro page = memdup_user_nul(buf, count); 2848365a719SAl Viro if (IS_ERR(page)) 2858365a719SAl Viro return PTR_ERR(page); 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds length = -EINVAL; 2881da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 2891da177e4SLinus Torvalds goto out; 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds if (new_value) { 2921da177e4SLinus Torvalds length = selinux_disable(); 293b77a493bSEric Paris if (length) 2941da177e4SLinus Torvalds goto out; 295af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 2964746ec5bSEric Paris "selinux=0 auid=%u ses=%u", 297581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 2984746ec5bSEric Paris audit_get_sessionid(current)); 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds length = count; 3021da177e4SLinus Torvalds out: 3038365a719SAl Viro kfree(page); 3041da177e4SLinus Torvalds return length; 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds #else 3071da177e4SLinus Torvalds #define sel_write_disable NULL 3081da177e4SLinus Torvalds #endif 3091da177e4SLinus Torvalds 3109c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3111da177e4SLinus Torvalds .write = sel_write_disable, 31257a62c23SArnd Bergmann .llseek = generic_file_llseek, 3131da177e4SLinus Torvalds }; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3161da177e4SLinus Torvalds size_t count, loff_t *ppos) 3171da177e4SLinus Torvalds { 3181da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3191da177e4SLinus Torvalds ssize_t length; 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3221da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 3259c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3261da177e4SLinus Torvalds .read = sel_read_policyvers, 32757a62c23SArnd Bergmann .llseek = generic_file_llseek, 3281da177e4SLinus Torvalds }; 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds /* declaration for sel_write_load */ 3311da177e4SLinus Torvalds static int sel_make_bools(void); 332e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void); 3333bb56b25SPaul Moore static int sel_make_policycap(void); 334e47c8fc5SChristopher J. PeBenito 335e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 336a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 337e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3401da177e4SLinus Torvalds size_t count, loff_t *ppos) 3411da177e4SLinus Torvalds { 3421da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3431da177e4SLinus Torvalds ssize_t length; 3441da177e4SLinus Torvalds 3450719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3460719aaf5SGuido Trentalancia security_mls_enabled()); 3471da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds 3509c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3511da177e4SLinus Torvalds .read = sel_read_mls, 35257a62c23SArnd Bergmann .llseek = generic_file_llseek, 3531da177e4SLinus Torvalds }; 3541da177e4SLinus Torvalds 355cee74f47SEric Paris struct policy_load_memory { 356cee74f47SEric Paris size_t len; 357cee74f47SEric Paris void *data; 358cee74f47SEric Paris }; 359cee74f47SEric Paris 360cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 361cee74f47SEric Paris { 362cee74f47SEric Paris struct policy_load_memory *plm = NULL; 363cee74f47SEric Paris int rc; 364cee74f47SEric Paris 365cee74f47SEric Paris BUG_ON(filp->private_data); 366cee74f47SEric Paris 367cee74f47SEric Paris mutex_lock(&sel_mutex); 368cee74f47SEric Paris 369cee74f47SEric Paris rc = task_has_security(current, SECURITY__READ_POLICY); 370cee74f47SEric Paris if (rc) 371cee74f47SEric Paris goto err; 372cee74f47SEric Paris 373cee74f47SEric Paris rc = -EBUSY; 374cee74f47SEric Paris if (policy_opened) 375cee74f47SEric Paris goto err; 376cee74f47SEric Paris 377cee74f47SEric Paris rc = -ENOMEM; 378cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 379cee74f47SEric Paris if (!plm) 380cee74f47SEric Paris goto err; 381cee74f47SEric Paris 382cee74f47SEric Paris if (i_size_read(inode) != security_policydb_len()) { 3835955102cSAl Viro inode_lock(inode); 384cee74f47SEric Paris i_size_write(inode, security_policydb_len()); 3855955102cSAl Viro inode_unlock(inode); 386cee74f47SEric Paris } 387cee74f47SEric Paris 388cee74f47SEric Paris rc = security_read_policy(&plm->data, &plm->len); 389cee74f47SEric Paris if (rc) 390cee74f47SEric Paris goto err; 391cee74f47SEric Paris 392cee74f47SEric Paris policy_opened = 1; 393cee74f47SEric Paris 394cee74f47SEric Paris filp->private_data = plm; 395cee74f47SEric Paris 396cee74f47SEric Paris mutex_unlock(&sel_mutex); 397cee74f47SEric Paris 398cee74f47SEric Paris return 0; 399cee74f47SEric Paris err: 400cee74f47SEric Paris mutex_unlock(&sel_mutex); 401cee74f47SEric Paris 402cee74f47SEric Paris if (plm) 403cee74f47SEric Paris vfree(plm->data); 404cee74f47SEric Paris kfree(plm); 405cee74f47SEric Paris return rc; 406cee74f47SEric Paris } 407cee74f47SEric Paris 408cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 409cee74f47SEric Paris { 410cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 411cee74f47SEric Paris 412cee74f47SEric Paris BUG_ON(!plm); 413cee74f47SEric Paris 414cee74f47SEric Paris policy_opened = 0; 415cee74f47SEric Paris 416cee74f47SEric Paris vfree(plm->data); 417cee74f47SEric Paris kfree(plm); 418cee74f47SEric Paris 419cee74f47SEric Paris return 0; 420cee74f47SEric Paris } 421cee74f47SEric Paris 422cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 423cee74f47SEric Paris size_t count, loff_t *ppos) 424cee74f47SEric Paris { 425cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 426cee74f47SEric Paris int ret; 427cee74f47SEric Paris 428cee74f47SEric Paris mutex_lock(&sel_mutex); 429cee74f47SEric Paris 430cee74f47SEric Paris ret = task_has_security(current, SECURITY__READ_POLICY); 431cee74f47SEric Paris if (ret) 432cee74f47SEric Paris goto out; 433cee74f47SEric Paris 434cee74f47SEric Paris ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 435cee74f47SEric Paris out: 436cee74f47SEric Paris mutex_unlock(&sel_mutex); 437cee74f47SEric Paris return ret; 438cee74f47SEric Paris } 439cee74f47SEric Paris 440845ca30fSEric Paris static int sel_mmap_policy_fault(struct vm_area_struct *vma, 441845ca30fSEric Paris struct vm_fault *vmf) 442845ca30fSEric Paris { 443845ca30fSEric Paris struct policy_load_memory *plm = vma->vm_file->private_data; 444845ca30fSEric Paris unsigned long offset; 445845ca30fSEric Paris struct page *page; 446845ca30fSEric Paris 447845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 448845ca30fSEric Paris return VM_FAULT_SIGBUS; 449845ca30fSEric Paris 450845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 451845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 452845ca30fSEric Paris return VM_FAULT_SIGBUS; 453845ca30fSEric Paris 454845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 455845ca30fSEric Paris get_page(page); 456845ca30fSEric Paris 457845ca30fSEric Paris vmf->page = page; 458845ca30fSEric Paris 459845ca30fSEric Paris return 0; 460845ca30fSEric Paris } 461845ca30fSEric Paris 4627cbea8dcSKirill A. Shutemov static const struct vm_operations_struct sel_mmap_policy_ops = { 463845ca30fSEric Paris .fault = sel_mmap_policy_fault, 464845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 465845ca30fSEric Paris }; 466845ca30fSEric Paris 467ad3fa08cSJames Morris static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 468845ca30fSEric Paris { 469845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 470845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 471845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 472845ca30fSEric Paris 473845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 474845ca30fSEric Paris return -EACCES; 475845ca30fSEric Paris } 476845ca30fSEric Paris 477314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 478845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 479845ca30fSEric Paris 480845ca30fSEric Paris return 0; 481845ca30fSEric Paris } 482845ca30fSEric Paris 483cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 484cee74f47SEric Paris .open = sel_open_policy, 485cee74f47SEric Paris .read = sel_read_policy, 486845ca30fSEric Paris .mmap = sel_mmap_policy, 487cee74f47SEric Paris .release = sel_release_policy, 48847a93a5bSEric Paris .llseek = generic_file_llseek, 489cee74f47SEric Paris }; 490cee74f47SEric Paris 4911da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 4921da177e4SLinus Torvalds size_t count, loff_t *ppos) 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds { 4951da177e4SLinus Torvalds ssize_t length; 4961da177e4SLinus Torvalds void *data = NULL; 4971da177e4SLinus Torvalds 498bb003079SIngo Molnar mutex_lock(&sel_mutex); 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds length = task_has_security(current, SECURITY__LOAD_POLICY); 5011da177e4SLinus Torvalds if (length) 5021da177e4SLinus Torvalds goto out; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds /* No partial writes. */ 5051da177e4SLinus Torvalds length = -EINVAL; 506b77a493bSEric Paris if (*ppos != 0) 5071da177e4SLinus Torvalds goto out; 5081da177e4SLinus Torvalds 509b77a493bSEric Paris length = -EFBIG; 510b77a493bSEric Paris if (count > 64 * 1024 * 1024) 5111da177e4SLinus Torvalds goto out; 512b77a493bSEric Paris 513b77a493bSEric Paris length = -ENOMEM; 514b77a493bSEric Paris data = vmalloc(count); 515b77a493bSEric Paris if (!data) 516b77a493bSEric Paris goto out; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds length = -EFAULT; 5191da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5201da177e4SLinus Torvalds goto out; 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds length = security_load_policy(data, count); 5231da177e4SLinus Torvalds if (length) 5241da177e4SLinus Torvalds goto out; 5251da177e4SLinus Torvalds 526b77a493bSEric Paris length = sel_make_bools(); 527b77a493bSEric Paris if (length) 528e47c8fc5SChristopher J. PeBenito goto out1; 529e47c8fc5SChristopher J. PeBenito 530b77a493bSEric Paris length = sel_make_classes(); 531b77a493bSEric Paris if (length) 5323bb56b25SPaul Moore goto out1; 5333bb56b25SPaul Moore 534b77a493bSEric Paris length = sel_make_policycap(); 535b77a493bSEric Paris if (length) 536b77a493bSEric Paris goto out1; 537b77a493bSEric Paris 5381da177e4SLinus Torvalds length = count; 539e47c8fc5SChristopher J. PeBenito 540e47c8fc5SChristopher J. PeBenito out1: 541af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 5424746ec5bSEric Paris "policy loaded auid=%u ses=%u", 543581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 5444746ec5bSEric Paris audit_get_sessionid(current)); 5451da177e4SLinus Torvalds out: 546bb003079SIngo Molnar mutex_unlock(&sel_mutex); 5471da177e4SLinus Torvalds vfree(data); 5481da177e4SLinus Torvalds return length; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5519c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5521da177e4SLinus Torvalds .write = sel_write_load, 55357a62c23SArnd Bergmann .llseek = generic_file_llseek, 5541da177e4SLinus Torvalds }; 5551da177e4SLinus Torvalds 556ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5571da177e4SLinus Torvalds { 558b77a493bSEric Paris char *canon = NULL; 559ce9982d0SStephen Smalley u32 sid, len; 5601da177e4SLinus Torvalds ssize_t length; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds length = task_has_security(current, SECURITY__CHECK_CONTEXT); 5631da177e4SLinus Torvalds if (length) 564b77a493bSEric Paris goto out; 5651da177e4SLinus Torvalds 56652a4c640SNikolay Aleksandrov length = security_context_to_sid(buf, size, &sid, GFP_KERNEL); 567b77a493bSEric Paris if (length) 568b77a493bSEric Paris goto out; 5691da177e4SLinus Torvalds 570ce9982d0SStephen Smalley length = security_sid_to_context(sid, &canon, &len); 571b77a493bSEric Paris if (length) 572b77a493bSEric Paris goto out; 573ce9982d0SStephen Smalley 574b77a493bSEric Paris length = -ERANGE; 575ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 576744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 577744ba35eSEric Paris "payload max\n", __func__, len); 578ce9982d0SStephen Smalley goto out; 579ce9982d0SStephen Smalley } 580ce9982d0SStephen Smalley 581ce9982d0SStephen Smalley memcpy(buf, canon, len); 582ce9982d0SStephen Smalley length = len; 5831da177e4SLinus Torvalds out: 584ce9982d0SStephen Smalley kfree(canon); 5851da177e4SLinus Torvalds return length; 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 5891da177e4SLinus Torvalds size_t count, loff_t *ppos) 5901da177e4SLinus Torvalds { 5911da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 5921da177e4SLinus Torvalds ssize_t length; 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); 5951da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 5991da177e4SLinus Torvalds size_t count, loff_t *ppos) 6001da177e4SLinus Torvalds { 6018365a719SAl Viro char *page; 6021da177e4SLinus Torvalds ssize_t length; 6031da177e4SLinus Torvalds unsigned int new_value; 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETCHECKREQPROT); 6061da177e4SLinus Torvalds if (length) 6078365a719SAl Viro return length; 6081da177e4SLinus Torvalds 609bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 6108365a719SAl Viro return -ENOMEM; 611b77a493bSEric Paris 6121da177e4SLinus Torvalds /* No partial writes. */ 613b77a493bSEric Paris if (*ppos != 0) 6148365a719SAl Viro return -EINVAL; 615b77a493bSEric Paris 6168365a719SAl Viro page = memdup_user_nul(buf, count); 6178365a719SAl Viro if (IS_ERR(page)) 6188365a719SAl Viro return PTR_ERR(page); 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds length = -EINVAL; 6211da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6221da177e4SLinus Torvalds goto out; 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds selinux_checkreqprot = new_value ? 1 : 0; 6251da177e4SLinus Torvalds length = count; 6261da177e4SLinus Torvalds out: 6278365a719SAl Viro kfree(page); 6281da177e4SLinus Torvalds return length; 6291da177e4SLinus Torvalds } 6309c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6311da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6321da177e4SLinus Torvalds .write = sel_write_checkreqprot, 63357a62c23SArnd Bergmann .llseek = generic_file_llseek, 6341da177e4SLinus Torvalds }; 6351da177e4SLinus Torvalds 636f9df6458SAndrew Perepechko static ssize_t sel_write_validatetrans(struct file *file, 637f9df6458SAndrew Perepechko const char __user *buf, 638f9df6458SAndrew Perepechko size_t count, loff_t *ppos) 639f9df6458SAndrew Perepechko { 640f9df6458SAndrew Perepechko char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; 641f9df6458SAndrew Perepechko char *req = NULL; 642f9df6458SAndrew Perepechko u32 osid, nsid, tsid; 643f9df6458SAndrew Perepechko u16 tclass; 644f9df6458SAndrew Perepechko int rc; 645f9df6458SAndrew Perepechko 646f9df6458SAndrew Perepechko rc = task_has_security(current, SECURITY__VALIDATE_TRANS); 647f9df6458SAndrew Perepechko if (rc) 648f9df6458SAndrew Perepechko goto out; 649f9df6458SAndrew Perepechko 650f9df6458SAndrew Perepechko rc = -ENOMEM; 651f9df6458SAndrew Perepechko if (count >= PAGE_SIZE) 652f9df6458SAndrew Perepechko goto out; 653f9df6458SAndrew Perepechko 654f9df6458SAndrew Perepechko /* No partial writes. */ 655f9df6458SAndrew Perepechko rc = -EINVAL; 656f9df6458SAndrew Perepechko if (*ppos != 0) 657f9df6458SAndrew Perepechko goto out; 658f9df6458SAndrew Perepechko 659f9df6458SAndrew Perepechko rc = -ENOMEM; 660f9df6458SAndrew Perepechko req = kzalloc(count + 1, GFP_KERNEL); 661f9df6458SAndrew Perepechko if (!req) 662f9df6458SAndrew Perepechko goto out; 663f9df6458SAndrew Perepechko 664f9df6458SAndrew Perepechko rc = -EFAULT; 665f9df6458SAndrew Perepechko if (copy_from_user(req, buf, count)) 666f9df6458SAndrew Perepechko goto out; 667f9df6458SAndrew Perepechko 668f9df6458SAndrew Perepechko rc = -ENOMEM; 669f9df6458SAndrew Perepechko oldcon = kzalloc(count + 1, GFP_KERNEL); 670f9df6458SAndrew Perepechko if (!oldcon) 671f9df6458SAndrew Perepechko goto out; 672f9df6458SAndrew Perepechko 673f9df6458SAndrew Perepechko newcon = kzalloc(count + 1, GFP_KERNEL); 674f9df6458SAndrew Perepechko if (!newcon) 675f9df6458SAndrew Perepechko goto out; 676f9df6458SAndrew Perepechko 677f9df6458SAndrew Perepechko taskcon = kzalloc(count + 1, GFP_KERNEL); 678f9df6458SAndrew Perepechko if (!taskcon) 679f9df6458SAndrew Perepechko goto out; 680f9df6458SAndrew Perepechko 681f9df6458SAndrew Perepechko rc = -EINVAL; 682f9df6458SAndrew Perepechko if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) 683f9df6458SAndrew Perepechko goto out; 684f9df6458SAndrew Perepechko 685f9df6458SAndrew Perepechko rc = security_context_str_to_sid(oldcon, &osid, GFP_KERNEL); 686f9df6458SAndrew Perepechko if (rc) 687f9df6458SAndrew Perepechko goto out; 688f9df6458SAndrew Perepechko 689f9df6458SAndrew Perepechko rc = security_context_str_to_sid(newcon, &nsid, GFP_KERNEL); 690f9df6458SAndrew Perepechko if (rc) 691f9df6458SAndrew Perepechko goto out; 692f9df6458SAndrew Perepechko 693f9df6458SAndrew Perepechko rc = security_context_str_to_sid(taskcon, &tsid, GFP_KERNEL); 694f9df6458SAndrew Perepechko if (rc) 695f9df6458SAndrew Perepechko goto out; 696f9df6458SAndrew Perepechko 697f9df6458SAndrew Perepechko rc = security_validate_transition_user(osid, nsid, tsid, tclass); 698f9df6458SAndrew Perepechko if (!rc) 699f9df6458SAndrew Perepechko rc = count; 700f9df6458SAndrew Perepechko out: 701f9df6458SAndrew Perepechko kfree(req); 702f9df6458SAndrew Perepechko kfree(oldcon); 703f9df6458SAndrew Perepechko kfree(newcon); 704f9df6458SAndrew Perepechko kfree(taskcon); 705f9df6458SAndrew Perepechko return rc; 706f9df6458SAndrew Perepechko } 707f9df6458SAndrew Perepechko 708f9df6458SAndrew Perepechko static const struct file_operations sel_transition_ops = { 709f9df6458SAndrew Perepechko .write = sel_write_validatetrans, 710f9df6458SAndrew Perepechko .llseek = generic_file_llseek, 711f9df6458SAndrew Perepechko }; 712f9df6458SAndrew Perepechko 7131da177e4SLinus Torvalds /* 7141da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 7151da177e4SLinus Torvalds */ 7161da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 7171da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 7181da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 7191da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 7201da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 7231da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 7241da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 7251da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 7261da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 7271da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 728ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 7291da177e4SLinus Torvalds }; 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 7321da177e4SLinus Torvalds { 733496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 7341da177e4SLinus Torvalds char *data; 7351da177e4SLinus Torvalds ssize_t rv; 7361da177e4SLinus Torvalds 7376e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 7381da177e4SLinus Torvalds return -EINVAL; 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 7411da177e4SLinus Torvalds if (IS_ERR(data)) 7421da177e4SLinus Torvalds return PTR_ERR(data); 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 7451da177e4SLinus Torvalds if (rv > 0) { 7461da177e4SLinus Torvalds simple_transaction_set(file, rv); 7471da177e4SLinus Torvalds rv = size; 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds return rv; 7501da177e4SLinus Torvalds } 7511da177e4SLinus Torvalds 7529c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 7531da177e4SLinus Torvalds .write = selinux_transaction_write, 7541da177e4SLinus Torvalds .read = simple_transaction_read, 7551da177e4SLinus Torvalds .release = simple_transaction_release, 75657a62c23SArnd Bergmann .llseek = generic_file_llseek, 7571da177e4SLinus Torvalds }; 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds /* 7601da177e4SLinus Torvalds * payload - write methods 7611da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 7621da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 7631da177e4SLinus Torvalds */ 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 7661da177e4SLinus Torvalds { 767b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 7681da177e4SLinus Torvalds u32 ssid, tsid; 7691da177e4SLinus Torvalds u16 tclass; 7701da177e4SLinus Torvalds struct av_decision avd; 7711da177e4SLinus Torvalds ssize_t length; 7721da177e4SLinus Torvalds 7731da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_AV); 7741da177e4SLinus Torvalds if (length) 775b77a493bSEric Paris goto out; 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds length = -ENOMEM; 77889d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 7791da177e4SLinus Torvalds if (!scon) 780b77a493bSEric Paris goto out; 7811da177e4SLinus Torvalds 782b77a493bSEric Paris length = -ENOMEM; 78389d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 7841da177e4SLinus Torvalds if (!tcon) 7851da177e4SLinus Torvalds goto out; 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds length = -EINVAL; 78819439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 789b77a493bSEric Paris goto out; 7901da177e4SLinus Torvalds 79144be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 792b77a493bSEric Paris if (length) 793b77a493bSEric Paris goto out; 794b77a493bSEric Paris 79544be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 796b77a493bSEric Paris if (length) 797b77a493bSEric Paris goto out; 7981da177e4SLinus Torvalds 79919439d05SStephen Smalley security_compute_av_user(ssid, tsid, tclass, &avd); 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 8028a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 803f1c6381aSEric Paris avd.allowed, 0xffffffff, 8041da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 8058a6f83afSKaiGai Kohei avd.seqno, avd.flags); 8061da177e4SLinus Torvalds out: 807b77a493bSEric Paris kfree(tcon); 8081da177e4SLinus Torvalds kfree(scon); 8091da177e4SLinus Torvalds return length; 8101da177e4SLinus Torvalds } 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 8131da177e4SLinus Torvalds { 814b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 815f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 8161da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8171da177e4SLinus Torvalds u16 tclass; 8181da177e4SLinus Torvalds ssize_t length; 819b77a493bSEric Paris char *newcon = NULL; 8201da177e4SLinus Torvalds u32 len; 821f50a3ec9SKohei Kaigai int nargs; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_CREATE); 8241da177e4SLinus Torvalds if (length) 825b77a493bSEric Paris goto out; 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds length = -ENOMEM; 82889d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8291da177e4SLinus Torvalds if (!scon) 830b77a493bSEric Paris goto out; 8311da177e4SLinus Torvalds 832b77a493bSEric Paris length = -ENOMEM; 83389d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8341da177e4SLinus Torvalds if (!tcon) 8351da177e4SLinus Torvalds goto out; 8361da177e4SLinus Torvalds 837f50a3ec9SKohei Kaigai length = -ENOMEM; 838f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 839f50a3ec9SKohei Kaigai if (!namebuf) 840b77a493bSEric Paris goto out; 8411da177e4SLinus Torvalds 842f50a3ec9SKohei Kaigai length = -EINVAL; 843f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 844f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 845f50a3ec9SKohei Kaigai goto out; 8460f7e4c33SKohei Kaigai if (nargs == 4) { 8470f7e4c33SKohei Kaigai /* 8480f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 8490f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 8500f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 8510f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 8520f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 8530f7e4c33SKohei Kaigai */ 8540f7e4c33SKohei Kaigai char *r, *w; 8550f7e4c33SKohei Kaigai int c1, c2; 8560f7e4c33SKohei Kaigai 8570f7e4c33SKohei Kaigai r = w = namebuf; 8580f7e4c33SKohei Kaigai do { 8590f7e4c33SKohei Kaigai c1 = *r++; 8600f7e4c33SKohei Kaigai if (c1 == '+') 8610f7e4c33SKohei Kaigai c1 = ' '; 8620f7e4c33SKohei Kaigai else if (c1 == '%') { 863af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 864af7ff2c2SAndy Shevchenko if (c1 < 0) 8650f7e4c33SKohei Kaigai goto out; 866af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 867af7ff2c2SAndy Shevchenko if (c2 < 0) 8680f7e4c33SKohei Kaigai goto out; 8690f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 8700f7e4c33SKohei Kaigai } 8710f7e4c33SKohei Kaigai *w++ = c1; 8720f7e4c33SKohei Kaigai } while (c1 != '\0'); 8730f7e4c33SKohei Kaigai 874f50a3ec9SKohei Kaigai objname = namebuf; 8750f7e4c33SKohei Kaigai } 876f50a3ec9SKohei Kaigai 87744be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 878b77a493bSEric Paris if (length) 879b77a493bSEric Paris goto out; 880b77a493bSEric Paris 88144be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 882b77a493bSEric Paris if (length) 883b77a493bSEric Paris goto out; 8841da177e4SLinus Torvalds 885f50a3ec9SKohei Kaigai length = security_transition_sid_user(ssid, tsid, tclass, 886f50a3ec9SKohei Kaigai objname, &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 894b77a493bSEric Paris length = -ERANGE; 8951da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 896744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 897744ba35eSEric Paris "payload max\n", __func__, len); 898b77a493bSEric Paris goto out; 8991da177e4SLinus Torvalds } 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds memcpy(buf, newcon, len); 9021da177e4SLinus Torvalds length = len; 9031da177e4SLinus Torvalds out: 904b77a493bSEric Paris kfree(newcon); 905f50a3ec9SKohei Kaigai kfree(namebuf); 906b77a493bSEric Paris kfree(tcon); 9071da177e4SLinus Torvalds kfree(scon); 9081da177e4SLinus Torvalds return length; 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 9121da177e4SLinus Torvalds { 913b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9141da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9151da177e4SLinus Torvalds u16 tclass; 9161da177e4SLinus Torvalds ssize_t length; 917b77a493bSEric Paris char *newcon = NULL; 9181da177e4SLinus Torvalds u32 len; 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_RELABEL); 9211da177e4SLinus Torvalds if (length) 922b77a493bSEric Paris goto out; 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds length = -ENOMEM; 92589d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9261da177e4SLinus Torvalds if (!scon) 927b77a493bSEric Paris goto out; 9281da177e4SLinus Torvalds 929b77a493bSEric Paris length = -ENOMEM; 93089d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9311da177e4SLinus Torvalds if (!tcon) 9321da177e4SLinus Torvalds goto out; 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds length = -EINVAL; 9351da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 936b77a493bSEric Paris goto out; 9371da177e4SLinus Torvalds 93844be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 939b77a493bSEric Paris if (length) 940b77a493bSEric Paris goto out; 941b77a493bSEric Paris 94244be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 943b77a493bSEric Paris if (length) 944b77a493bSEric Paris goto out; 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds length = security_change_sid(ssid, tsid, tclass, &newsid); 947b77a493bSEric Paris if (length) 948b77a493bSEric Paris goto out; 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 951b77a493bSEric Paris if (length) 952b77a493bSEric Paris goto out; 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds length = -ERANGE; 955b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 956b77a493bSEric Paris goto out; 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds memcpy(buf, newcon, len); 9591da177e4SLinus Torvalds length = len; 9601da177e4SLinus Torvalds out: 961b77a493bSEric Paris kfree(newcon); 962b77a493bSEric Paris kfree(tcon); 9631da177e4SLinus Torvalds kfree(scon); 9641da177e4SLinus Torvalds return length; 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 9681da177e4SLinus Torvalds { 969b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 970b77a493bSEric Paris u32 sid, *sids = NULL; 9711da177e4SLinus Torvalds ssize_t length; 9721da177e4SLinus Torvalds char *newcon; 9731da177e4SLinus Torvalds int i, rc; 9741da177e4SLinus Torvalds u32 len, nsids; 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_USER); 9771da177e4SLinus Torvalds if (length) 9786eab04a8SJustin P. Mattock goto out; 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds length = -ENOMEM; 98189d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 9821da177e4SLinus Torvalds if (!con) 9836eab04a8SJustin P. Mattock goto out; 9841da177e4SLinus Torvalds 985b77a493bSEric Paris length = -ENOMEM; 98689d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 9871da177e4SLinus Torvalds if (!user) 9881da177e4SLinus Torvalds goto out; 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds length = -EINVAL; 9911da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 992b77a493bSEric Paris goto out; 9931da177e4SLinus Torvalds 99444be2f65SRasmus Villemoes length = security_context_str_to_sid(con, &sid, GFP_KERNEL); 995b77a493bSEric Paris if (length) 996b77a493bSEric Paris goto out; 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds length = security_get_user_sids(sid, user, &sids, &nsids); 999b77a493bSEric Paris if (length) 1000b77a493bSEric Paris goto out; 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 10031da177e4SLinus Torvalds ptr = buf + length; 10041da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 10051da177e4SLinus Torvalds rc = security_sid_to_context(sids[i], &newcon, &len); 10061da177e4SLinus Torvalds if (rc) { 10071da177e4SLinus Torvalds length = rc; 1008b77a493bSEric Paris goto out; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 10111da177e4SLinus Torvalds kfree(newcon); 10121da177e4SLinus Torvalds length = -ERANGE; 1013b77a493bSEric Paris goto out; 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds memcpy(ptr, newcon, len); 10161da177e4SLinus Torvalds kfree(newcon); 10171da177e4SLinus Torvalds ptr += len; 10181da177e4SLinus Torvalds length += len; 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds out: 1021b77a493bSEric Paris kfree(sids); 1022b77a493bSEric Paris kfree(user); 10231da177e4SLinus Torvalds kfree(con); 10241da177e4SLinus Torvalds return length; 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 10281da177e4SLinus Torvalds { 1029b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 10301da177e4SLinus Torvalds u32 ssid, tsid, newsid; 10311da177e4SLinus Torvalds u16 tclass; 10321da177e4SLinus Torvalds ssize_t length; 1033b77a493bSEric Paris char *newcon = NULL; 10341da177e4SLinus Torvalds u32 len; 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds length = task_has_security(current, SECURITY__COMPUTE_MEMBER); 10371da177e4SLinus Torvalds if (length) 1038b77a493bSEric Paris goto out; 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds length = -ENOMEM; 104189d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 10421da177e4SLinus Torvalds if (!scon) 10436eab04a8SJustin P. Mattock goto out; 10441da177e4SLinus Torvalds 1045b77a493bSEric Paris length = -ENOMEM; 104689d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 10471da177e4SLinus Torvalds if (!tcon) 10481da177e4SLinus Torvalds goto out; 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds length = -EINVAL; 10511da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1052b77a493bSEric Paris goto out; 10531da177e4SLinus Torvalds 105444be2f65SRasmus Villemoes length = security_context_str_to_sid(scon, &ssid, GFP_KERNEL); 1055b77a493bSEric Paris if (length) 1056b77a493bSEric Paris goto out; 1057b77a493bSEric Paris 105844be2f65SRasmus Villemoes length = security_context_str_to_sid(tcon, &tsid, GFP_KERNEL); 1059b77a493bSEric Paris if (length) 1060b77a493bSEric Paris goto out; 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds length = security_member_sid(ssid, tsid, tclass, &newsid); 1063b77a493bSEric Paris if (length) 1064b77a493bSEric Paris goto out; 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds length = security_sid_to_context(newsid, &newcon, &len); 1067b77a493bSEric Paris if (length) 1068b77a493bSEric Paris goto out; 10691da177e4SLinus Torvalds 1070b77a493bSEric Paris length = -ERANGE; 10711da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1072744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 1073744ba35eSEric Paris "payload max\n", __func__, len); 1074b77a493bSEric Paris goto out; 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds 10771da177e4SLinus Torvalds memcpy(buf, newcon, len); 10781da177e4SLinus Torvalds length = len; 10791da177e4SLinus Torvalds out: 1080b77a493bSEric Paris kfree(newcon); 1081b77a493bSEric Paris kfree(tcon); 10821da177e4SLinus Torvalds kfree(scon); 10831da177e4SLinus Torvalds return length; 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 10871da177e4SLinus Torvalds { 10881da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds if (ret) { 10911da177e4SLinus Torvalds ret->i_mode = mode; 1092078cd827SDeepa Dinamani ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds return ret; 10951da177e4SLinus Torvalds } 10961da177e4SLinus Torvalds 10971da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 10981da177e4SLinus Torvalds size_t count, loff_t *ppos) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds char *page = NULL; 11011da177e4SLinus Torvalds ssize_t length; 11021da177e4SLinus Torvalds ssize_t ret; 11031da177e4SLinus Torvalds int cur_enforcing; 1104496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1105d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 11061da177e4SLinus Torvalds 1107bb003079SIngo Molnar mutex_lock(&sel_mutex); 11081da177e4SLinus Torvalds 1109d313f948SStephen Smalley ret = -EINVAL; 1110b77a493bSEric Paris if (index >= bool_num || strcmp(name, bool_pending_names[index])) 1111d313f948SStephen Smalley goto out; 11121da177e4SLinus Torvalds 11131da177e4SLinus Torvalds ret = -ENOMEM; 1114b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1115b77a493bSEric Paris if (!page) 11161da177e4SLinus Torvalds goto out; 11171da177e4SLinus Torvalds 1118d313f948SStephen Smalley cur_enforcing = security_get_bool_value(index); 11191da177e4SLinus Torvalds if (cur_enforcing < 0) { 11201da177e4SLinus Torvalds ret = cur_enforcing; 11211da177e4SLinus Torvalds goto out; 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 1124d313f948SStephen Smalley bool_pending_values[index]); 112568bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 11261da177e4SLinus Torvalds out: 1127bb003079SIngo Molnar mutex_unlock(&sel_mutex); 11281da177e4SLinus Torvalds free_page((unsigned long)page); 11291da177e4SLinus Torvalds return ret; 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 11331da177e4SLinus Torvalds size_t count, loff_t *ppos) 11341da177e4SLinus Torvalds { 11351da177e4SLinus Torvalds char *page = NULL; 1136d313f948SStephen Smalley ssize_t length; 11371da177e4SLinus Torvalds int new_value; 1138496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1139d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 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 1147d313f948SStephen Smalley length = -EINVAL; 1148b77a493bSEric Paris if (index >= bool_num || strcmp(name, bool_pending_names[index])) 1149d313f948SStephen Smalley goto out; 1150d313f948SStephen Smalley 11511da177e4SLinus Torvalds length = -ENOMEM; 1152b77a493bSEric Paris if (count >= PAGE_SIZE) 11531da177e4SLinus Torvalds goto out; 1154d313f948SStephen Smalley 11551da177e4SLinus Torvalds /* No partial writes. */ 1156d313f948SStephen Smalley length = -EINVAL; 1157b77a493bSEric Paris if (*ppos != 0) 11581da177e4SLinus Torvalds goto out; 1159b77a493bSEric Paris 11608365a719SAl Viro page = memdup_user_nul(buf, count); 11618365a719SAl Viro if (IS_ERR(page)) { 11628365a719SAl Viro length = PTR_ERR(page); 11638365a719SAl Viro page = NULL; 11641da177e4SLinus Torvalds goto out; 11658365a719SAl Viro } 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds length = -EINVAL; 11681da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 11691da177e4SLinus Torvalds goto out; 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds if (new_value) 11721da177e4SLinus Torvalds new_value = 1; 11731da177e4SLinus Torvalds 1174d313f948SStephen Smalley bool_pending_values[index] = new_value; 11751da177e4SLinus Torvalds length = count; 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds out: 1178bb003079SIngo Molnar mutex_unlock(&sel_mutex); 11798365a719SAl Viro kfree(page); 11801da177e4SLinus Torvalds return length; 11811da177e4SLinus Torvalds } 11821da177e4SLinus Torvalds 11839c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 11841da177e4SLinus Torvalds .read = sel_read_bool, 11851da177e4SLinus Torvalds .write = sel_write_bool, 118657a62c23SArnd Bergmann .llseek = generic_file_llseek, 11871da177e4SLinus Torvalds }; 11881da177e4SLinus Torvalds 11891da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 11901da177e4SLinus Torvalds const char __user *buf, 11911da177e4SLinus Torvalds size_t count, loff_t *ppos) 11921da177e4SLinus Torvalds { 11931da177e4SLinus Torvalds char *page = NULL; 1194d313f948SStephen Smalley ssize_t length; 11951da177e4SLinus Torvalds int new_value; 11961da177e4SLinus Torvalds 1197bb003079SIngo Molnar mutex_lock(&sel_mutex); 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds length = task_has_security(current, SECURITY__SETBOOL); 12001da177e4SLinus Torvalds if (length) 12011da177e4SLinus Torvalds goto out; 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds length = -ENOMEM; 1204b77a493bSEric Paris if (count >= PAGE_SIZE) 12051da177e4SLinus Torvalds goto out; 1206b77a493bSEric Paris 12071da177e4SLinus Torvalds /* No partial writes. */ 1208b77a493bSEric Paris length = -EINVAL; 1209b77a493bSEric Paris if (*ppos != 0) 12101da177e4SLinus Torvalds goto out; 1211b77a493bSEric Paris 12128365a719SAl Viro page = memdup_user_nul(buf, count); 12138365a719SAl Viro if (IS_ERR(page)) { 12148365a719SAl Viro length = PTR_ERR(page); 12158365a719SAl Viro page = NULL; 12161da177e4SLinus Torvalds goto out; 12178365a719SAl Viro } 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds length = -EINVAL; 12201da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 12211da177e4SLinus Torvalds goto out; 12221da177e4SLinus Torvalds 1223b77a493bSEric Paris length = 0; 12241872981bSEric Paris if (new_value && bool_pending_values) 1225b77a493bSEric Paris length = security_set_bools(bool_num, bool_pending_values); 12261da177e4SLinus Torvalds 1227b77a493bSEric Paris if (!length) 12281da177e4SLinus Torvalds length = count; 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds out: 1231bb003079SIngo Molnar mutex_unlock(&sel_mutex); 12328365a719SAl Viro kfree(page); 12331da177e4SLinus Torvalds return length; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 12369c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 12371da177e4SLinus Torvalds .write = sel_commit_bools_write, 123857a62c23SArnd Bergmann .llseek = generic_file_llseek, 12391da177e4SLinus Torvalds }; 12401da177e4SLinus Torvalds 12410c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 12421da177e4SLinus Torvalds { 1243ad52184bSAl Viro d_genocide(de); 1244ad52184bSAl Viro shrink_dcache_parent(de); 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds static int sel_make_bools(void) 12501da177e4SLinus Torvalds { 1251b77a493bSEric Paris int i, ret; 12521da177e4SLinus Torvalds ssize_t len; 12531da177e4SLinus Torvalds struct dentry *dentry = NULL; 12541da177e4SLinus Torvalds struct dentry *dir = bool_dir; 12551da177e4SLinus Torvalds struct inode *inode = NULL; 12561da177e4SLinus Torvalds struct inode_security_struct *isec; 12571da177e4SLinus Torvalds char **names = NULL, *page; 12581da177e4SLinus Torvalds int num; 12591da177e4SLinus Torvalds int *values = NULL; 12601da177e4SLinus Torvalds u32 sid; 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds /* remove any existing files */ 12638007f102SXiaotian Feng for (i = 0; i < bool_num; i++) 12648007f102SXiaotian Feng kfree(bool_pending_names[i]); 1265d313f948SStephen Smalley kfree(bool_pending_names); 12661da177e4SLinus Torvalds kfree(bool_pending_values); 1267154c50caSEric Paris bool_num = 0; 1268d313f948SStephen Smalley bool_pending_names = NULL; 126920c19e41SDavi Arnaut bool_pending_values = NULL; 12701da177e4SLinus Torvalds 12710c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 12721da177e4SLinus Torvalds 1273b77a493bSEric Paris ret = -ENOMEM; 12741872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 12751872981bSEric Paris if (!page) 1276b77a493bSEric Paris goto out; 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds ret = security_get_bools(&num, &names, &values); 1279b77a493bSEric Paris if (ret) 12801da177e4SLinus Torvalds goto out; 12811da177e4SLinus Torvalds 12821da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1283b77a493bSEric Paris ret = -ENOMEM; 12841da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1285b77a493bSEric Paris if (!dentry) 1286b77a493bSEric Paris goto out; 12871da177e4SLinus Torvalds 1288b77a493bSEric Paris ret = -ENOMEM; 1289b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 1290b77a493bSEric Paris if (!inode) 1291b77a493bSEric Paris goto out; 1292b77a493bSEric Paris 12931da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1294cc1dad71SAl Viro len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 1295b77a493bSEric Paris if (len >= PAGE_SIZE) 1296b77a493bSEric Paris goto out; 1297b77a493bSEric Paris 12981da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 12991872981bSEric Paris ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); 13001872981bSEric Paris if (ret) 1301b77a493bSEric Paris goto out; 1302b77a493bSEric Paris 13031da177e4SLinus Torvalds isec->sid = sid; 13041da177e4SLinus Torvalds isec->initialized = 1; 13051da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1306bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 13071da177e4SLinus Torvalds d_add(dentry, inode); 13081da177e4SLinus Torvalds } 13091da177e4SLinus Torvalds bool_num = num; 1310d313f948SStephen Smalley bool_pending_names = names; 13111da177e4SLinus Torvalds bool_pending_values = values; 1312b77a493bSEric Paris 1313b77a493bSEric Paris free_page((unsigned long)page); 1314b77a493bSEric Paris return 0; 13151da177e4SLinus Torvalds out: 13161da177e4SLinus Torvalds free_page((unsigned long)page); 1317b77a493bSEric Paris 13181da177e4SLinus Torvalds if (names) { 13199a5f04bfSJesper Juhl for (i = 0; i < num; i++) 13201da177e4SLinus Torvalds kfree(names[i]); 13211da177e4SLinus Torvalds kfree(names); 13221da177e4SLinus Torvalds } 132320c19e41SDavi Arnaut kfree(values); 13240c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1325b77a493bSEric Paris 1326b77a493bSEric Paris return ret; 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds #define NULL_FILE_NAME "null" 13301da177e4SLinus Torvalds 1331765927b2SAl Viro struct path selinux_null; 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 13341da177e4SLinus Torvalds size_t count, loff_t *ppos) 13351da177e4SLinus Torvalds { 13361da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 13371da177e4SLinus Torvalds ssize_t length; 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); 13401da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 13411da177e4SLinus Torvalds } 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 13441da177e4SLinus Torvalds const char __user *buf, 13451da177e4SLinus Torvalds size_t count, loff_t *ppos) 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds { 13488365a719SAl Viro char *page; 13491da177e4SLinus Torvalds ssize_t ret; 1350309c5fadSHeinrich Schuchardt unsigned int new_value; 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds ret = task_has_security(current, SECURITY__SETSECPARAM); 13531da177e4SLinus Torvalds if (ret) 13548365a719SAl Viro return ret; 1355b77a493bSEric Paris 1356b77a493bSEric Paris if (count >= PAGE_SIZE) 13578365a719SAl Viro return -ENOMEM; 1358b77a493bSEric Paris 1359b77a493bSEric Paris /* No partial writes. */ 1360b77a493bSEric Paris if (*ppos != 0) 13618365a719SAl Viro return -EINVAL; 1362b77a493bSEric Paris 13638365a719SAl Viro page = memdup_user_nul(buf, count); 13648365a719SAl Viro if (IS_ERR(page)) 13658365a719SAl Viro return PTR_ERR(page); 1366b77a493bSEric Paris 1367b77a493bSEric Paris ret = -EINVAL; 1368b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1369b77a493bSEric Paris goto out; 1370b77a493bSEric Paris 13711da177e4SLinus Torvalds avc_cache_threshold = new_value; 1372b77a493bSEric Paris 13731da177e4SLinus Torvalds ret = count; 13741da177e4SLinus Torvalds out: 13758365a719SAl Viro kfree(page); 13761da177e4SLinus Torvalds return ret; 13771da177e4SLinus Torvalds } 13781da177e4SLinus Torvalds 13791da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 13801da177e4SLinus Torvalds size_t count, loff_t *ppos) 13811da177e4SLinus Torvalds { 13821da177e4SLinus Torvalds char *page; 1383b77a493bSEric Paris ssize_t length; 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1386b77a493bSEric Paris if (!page) 1387b77a493bSEric Paris return -ENOMEM; 1388b77a493bSEric Paris 1389b77a493bSEric Paris length = avc_get_hash_stats(page); 1390b77a493bSEric Paris if (length >= 0) 1391b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 13921da177e4SLinus Torvalds free_page((unsigned long)page); 1393b77a493bSEric Paris 1394b77a493bSEric Paris return length; 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds 13979c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 13981da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 13991da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 140057a62c23SArnd Bergmann .llseek = generic_file_llseek, 14011da177e4SLinus Torvalds }; 14021da177e4SLinus Torvalds 14039c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 14041da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 140557a62c23SArnd Bergmann .llseek = generic_file_llseek, 14061da177e4SLinus Torvalds }; 14071da177e4SLinus Torvalds 14081da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 14091da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 14101da177e4SLinus Torvalds { 14111da177e4SLinus Torvalds int cpu; 14121da177e4SLinus Torvalds 14134f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 14141da177e4SLinus Torvalds if (!cpu_possible(cpu)) 14151da177e4SLinus Torvalds continue; 14161da177e4SLinus Torvalds *idx = cpu + 1; 14171da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 14181da177e4SLinus Torvalds } 14191da177e4SLinus Torvalds return NULL; 14201da177e4SLinus Torvalds } 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 14231da177e4SLinus Torvalds { 14241da177e4SLinus Torvalds loff_t n = *pos - 1; 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds if (*pos == 0) 14271da177e4SLinus Torvalds return SEQ_START_TOKEN; 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 14331da177e4SLinus Torvalds { 14341da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 14351da177e4SLinus Torvalds } 14361da177e4SLinus Torvalds 14371da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 14381da177e4SLinus Torvalds { 14391da177e4SLinus Torvalds struct avc_cache_stats *st = v; 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 14421da177e4SLinus Torvalds seq_printf(seq, "lookups hits misses allocations reclaims " 14431da177e4SLinus Torvalds "frees\n"); 1444257313b2SLinus Torvalds else { 1445257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1446257313b2SLinus Torvalds unsigned int misses = st->misses; 1447257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1448257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1449257313b2SLinus Torvalds hits, misses, st->allocations, 14501da177e4SLinus Torvalds st->reclaims, st->frees); 1451257313b2SLinus Torvalds } 14521da177e4SLinus Torvalds return 0; 14531da177e4SLinus Torvalds } 14541da177e4SLinus Torvalds 14551da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 14561da177e4SLinus Torvalds { } 14571da177e4SLinus Torvalds 14581996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 14591da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 14601da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 14611da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 14621da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 14631da177e4SLinus Torvalds }; 14641da177e4SLinus Torvalds 14651da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 14661da177e4SLinus Torvalds { 14671da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 14681da177e4SLinus Torvalds } 14691da177e4SLinus Torvalds 14709c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 14711da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 14721da177e4SLinus Torvalds .read = seq_read, 14731da177e4SLinus Torvalds .llseek = seq_lseek, 14741da177e4SLinus Torvalds .release = seq_release, 14751da177e4SLinus Torvalds }; 14761da177e4SLinus Torvalds #endif 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 14791da177e4SLinus Torvalds { 1480b77a493bSEric Paris int i; 14811da177e4SLinus Torvalds static struct tree_descr files[] = { 14821da177e4SLinus Torvalds { "cache_threshold", 14831da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 14841da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 14851da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 14861da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 14871da177e4SLinus Torvalds #endif 14881da177e4SLinus Torvalds }; 14891da177e4SLinus Torvalds 14906e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 14911da177e4SLinus Torvalds struct inode *inode; 14921da177e4SLinus Torvalds struct dentry *dentry; 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1495b77a493bSEric Paris if (!dentry) 1496b77a493bSEric Paris return -ENOMEM; 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 1499b77a493bSEric Paris if (!inode) 1500b77a493bSEric Paris return -ENOMEM; 1501b77a493bSEric Paris 15021da177e4SLinus Torvalds inode->i_fop = files[i].ops; 15036174eafcSJames Carter inode->i_ino = ++sel_last_ino; 15041da177e4SLinus Torvalds d_add(dentry, inode); 15051da177e4SLinus Torvalds } 1506b77a493bSEric Paris 1507b77a493bSEric Paris return 0; 15081da177e4SLinus Torvalds } 15091da177e4SLinus Torvalds 1510f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1511f0ee2e46SJames Carter size_t count, loff_t *ppos) 1512f0ee2e46SJames Carter { 1513f0ee2e46SJames Carter char *con; 1514f0ee2e46SJames Carter u32 sid, len; 1515f0ee2e46SJames Carter ssize_t ret; 1516f0ee2e46SJames Carter 1517496ad9aaSAl Viro sid = file_inode(file)->i_ino&SEL_INO_MASK; 1518f0ee2e46SJames Carter ret = security_sid_to_context(sid, &con, &len); 1519b77a493bSEric Paris if (ret) 1520f0ee2e46SJames Carter return ret; 1521f0ee2e46SJames Carter 1522f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1523f0ee2e46SJames Carter kfree(con); 1524f0ee2e46SJames Carter return ret; 1525f0ee2e46SJames Carter } 1526f0ee2e46SJames Carter 1527f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1528f0ee2e46SJames Carter .read = sel_read_initcon, 152957a62c23SArnd Bergmann .llseek = generic_file_llseek, 1530f0ee2e46SJames Carter }; 1531f0ee2e46SJames Carter 1532f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1533f0ee2e46SJames Carter { 1534b77a493bSEric Paris int i; 1535f0ee2e46SJames Carter 1536f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1537f0ee2e46SJames Carter struct inode *inode; 1538f0ee2e46SJames Carter struct dentry *dentry; 1539f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1540b77a493bSEric Paris if (!dentry) 1541b77a493bSEric Paris return -ENOMEM; 1542f0ee2e46SJames Carter 1543f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1544b77a493bSEric Paris if (!inode) 1545b77a493bSEric Paris return -ENOMEM; 1546b77a493bSEric Paris 1547f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1548f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1549f0ee2e46SJames Carter d_add(dentry, inode); 1550f0ee2e46SJames Carter } 1551b77a493bSEric Paris 1552b77a493bSEric Paris return 0; 1553f0ee2e46SJames Carter } 1554f0ee2e46SJames Carter 1555e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1556e47c8fc5SChristopher J. PeBenito { 1557e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1558e47c8fc5SChristopher J. PeBenito } 1559e47c8fc5SChristopher J. PeBenito 1560e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1561e47c8fc5SChristopher J. PeBenito { 156292ae9e82SEric Paris return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); 1563e47c8fc5SChristopher J. PeBenito } 1564e47c8fc5SChristopher J. PeBenito 1565e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1566e47c8fc5SChristopher J. PeBenito { 1567e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1568e47c8fc5SChristopher J. PeBenito } 1569e47c8fc5SChristopher J. PeBenito 1570e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1571e47c8fc5SChristopher J. PeBenito { 1572e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1573e47c8fc5SChristopher J. PeBenito } 1574e47c8fc5SChristopher J. PeBenito 1575e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1576e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1577e47c8fc5SChristopher J. PeBenito { 1578496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1579cc1dad71SAl Viro char res[TMPBUFLEN]; 1580cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); 1581cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1582e47c8fc5SChristopher J. PeBenito } 1583e47c8fc5SChristopher J. PeBenito 1584e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1585e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 158657a62c23SArnd Bergmann .llseek = generic_file_llseek, 1587e47c8fc5SChristopher J. PeBenito }; 1588e47c8fc5SChristopher J. PeBenito 1589e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1590e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1591e47c8fc5SChristopher J. PeBenito { 1592496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1593cc1dad71SAl Viro char res[TMPBUFLEN]; 1594cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); 1595cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1596e47c8fc5SChristopher J. PeBenito } 1597e47c8fc5SChristopher J. PeBenito 1598e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1599e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 160057a62c23SArnd Bergmann .llseek = generic_file_llseek, 1601e47c8fc5SChristopher J. PeBenito }; 1602e47c8fc5SChristopher J. PeBenito 16033bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 16043bb56b25SPaul Moore size_t count, loff_t *ppos) 16053bb56b25SPaul Moore { 16063bb56b25SPaul Moore int value; 16073bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 16083bb56b25SPaul Moore ssize_t length; 1609496ad9aaSAl Viro unsigned long i_ino = file_inode(file)->i_ino; 16103bb56b25SPaul Moore 16113bb56b25SPaul Moore value = security_policycap_supported(i_ino & SEL_INO_MASK); 16123bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 16133bb56b25SPaul Moore 16143bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 16153bb56b25SPaul Moore } 16163bb56b25SPaul Moore 16173bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 16183bb56b25SPaul Moore .read = sel_read_policycap, 161957a62c23SArnd Bergmann .llseek = generic_file_llseek, 16203bb56b25SPaul Moore }; 16213bb56b25SPaul Moore 1622e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1623e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1624e47c8fc5SChristopher J. PeBenito { 1625b77a493bSEric Paris int i, rc, nperms; 1626e47c8fc5SChristopher J. PeBenito char **perms; 1627e47c8fc5SChristopher J. PeBenito 1628e47c8fc5SChristopher J. PeBenito rc = security_get_permissions(objclass, &perms, &nperms); 1629e47c8fc5SChristopher J. PeBenito if (rc) 1630b77a493bSEric Paris return rc; 1631e47c8fc5SChristopher J. PeBenito 1632e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1633e47c8fc5SChristopher J. PeBenito struct inode *inode; 1634e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1635e47c8fc5SChristopher J. PeBenito 1636b77a493bSEric Paris rc = -ENOMEM; 1637e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1638b77a493bSEric Paris if (!dentry) 1639b77a493bSEric Paris goto out; 1640e47c8fc5SChristopher J. PeBenito 1641e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1642b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1643b77a493bSEric Paris if (!inode) 1644b77a493bSEric Paris goto out; 1645b77a493bSEric Paris 1646e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1647e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1648e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1649e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1650e47c8fc5SChristopher J. PeBenito } 1651b77a493bSEric Paris rc = 0; 1652b77a493bSEric Paris out: 1653e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1654e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1655e47c8fc5SChristopher J. PeBenito kfree(perms); 1656e47c8fc5SChristopher J. PeBenito return rc; 1657e47c8fc5SChristopher J. PeBenito } 1658e47c8fc5SChristopher J. PeBenito 1659e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1660e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1661e47c8fc5SChristopher J. PeBenito { 1662e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1663e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1664e47c8fc5SChristopher J. PeBenito int rc; 1665e47c8fc5SChristopher J. PeBenito 1666e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1667b77a493bSEric Paris if (!dentry) 1668b77a493bSEric Paris return -ENOMEM; 1669e47c8fc5SChristopher J. PeBenito 1670e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1671b77a493bSEric Paris if (!inode) 1672b77a493bSEric Paris return -ENOMEM; 1673e47c8fc5SChristopher J. PeBenito 1674e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1675e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1676e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1677e47c8fc5SChristopher J. PeBenito 1678a1c2aa1eSAl Viro dentry = sel_make_dir(dir, "perms", &last_class_ino); 1679a1c2aa1eSAl Viro if (IS_ERR(dentry)) 1680a1c2aa1eSAl Viro return PTR_ERR(dentry); 1681e47c8fc5SChristopher J. PeBenito 1682e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1683e47c8fc5SChristopher J. PeBenito 1684e47c8fc5SChristopher J. PeBenito return rc; 1685e47c8fc5SChristopher J. PeBenito } 1686e47c8fc5SChristopher J. PeBenito 1687e47c8fc5SChristopher J. PeBenito static int sel_make_classes(void) 1688e47c8fc5SChristopher J. PeBenito { 1689b77a493bSEric Paris int rc, nclasses, i; 1690e47c8fc5SChristopher J. PeBenito char **classes; 1691e47c8fc5SChristopher J. PeBenito 1692e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 1693ad52184bSAl Viro sel_remove_entries(class_dir); 1694e47c8fc5SChristopher J. PeBenito 1695e47c8fc5SChristopher J. PeBenito rc = security_get_classes(&classes, &nclasses); 1696b77a493bSEric Paris if (rc) 1697b77a493bSEric Paris return rc; 1698e47c8fc5SChristopher J. PeBenito 1699e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 1700e47c8fc5SChristopher J. PeBenito last_class_ino = sel_class_to_ino(nclasses + 2); 1701e47c8fc5SChristopher J. PeBenito 1702e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1703e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1704e47c8fc5SChristopher J. PeBenito 1705a1c2aa1eSAl Viro class_name_dir = sel_make_dir(class_dir, classes[i], 1706e47c8fc5SChristopher J. PeBenito &last_class_ino); 1707a1c2aa1eSAl Viro if (IS_ERR(class_name_dir)) { 1708a1c2aa1eSAl Viro rc = PTR_ERR(class_name_dir); 1709b77a493bSEric Paris goto out; 1710a1c2aa1eSAl Viro } 1711e47c8fc5SChristopher J. PeBenito 1712e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1713e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1714e47c8fc5SChristopher J. PeBenito class_name_dir); 1715e47c8fc5SChristopher J. PeBenito if (rc) 1716b77a493bSEric Paris goto out; 1717e47c8fc5SChristopher J. PeBenito } 1718b77a493bSEric Paris rc = 0; 1719b77a493bSEric Paris out: 1720e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1721e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1722e47c8fc5SChristopher J. PeBenito kfree(classes); 1723e47c8fc5SChristopher J. PeBenito return rc; 1724e47c8fc5SChristopher J. PeBenito } 1725e47c8fc5SChristopher J. PeBenito 17263bb56b25SPaul Moore static int sel_make_policycap(void) 17273bb56b25SPaul Moore { 17283bb56b25SPaul Moore unsigned int iter; 17293bb56b25SPaul Moore struct dentry *dentry = NULL; 17303bb56b25SPaul Moore struct inode *inode = NULL; 17313bb56b25SPaul Moore 17323bb56b25SPaul Moore sel_remove_entries(policycap_dir); 17333bb56b25SPaul Moore 17343bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 17353bb56b25SPaul Moore if (iter < ARRAY_SIZE(policycap_names)) 17363bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, 17373bb56b25SPaul Moore policycap_names[iter]); 17383bb56b25SPaul Moore else 17393bb56b25SPaul Moore dentry = d_alloc_name(policycap_dir, "unknown"); 17403bb56b25SPaul Moore 17413bb56b25SPaul Moore if (dentry == NULL) 17423bb56b25SPaul Moore return -ENOMEM; 17433bb56b25SPaul Moore 17443bb56b25SPaul Moore inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); 17453bb56b25SPaul Moore if (inode == NULL) 17463bb56b25SPaul Moore return -ENOMEM; 17473bb56b25SPaul Moore 17483bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 17493bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 17503bb56b25SPaul Moore d_add(dentry, inode); 17513bb56b25SPaul Moore } 17523bb56b25SPaul Moore 17533bb56b25SPaul Moore return 0; 17543bb56b25SPaul Moore } 17553bb56b25SPaul Moore 1756a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 17570dd4ae51SChristopher J. PeBenito unsigned long *ino) 17581da177e4SLinus Torvalds { 1759a1c2aa1eSAl Viro struct dentry *dentry = d_alloc_name(dir, name); 17601da177e4SLinus Torvalds struct inode *inode; 17611da177e4SLinus Torvalds 1762a1c2aa1eSAl Viro if (!dentry) 1763a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1764a1c2aa1eSAl Viro 1765a1c2aa1eSAl Viro inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1766a1c2aa1eSAl Viro if (!inode) { 1767a1c2aa1eSAl Viro dput(dentry); 1768a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1769a1c2aa1eSAl Viro } 1770b77a493bSEric Paris 17711da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 17721da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 17730dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 177440e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1775d8c76e6fSDave Hansen inc_nlink(inode); 17761da177e4SLinus Torvalds d_add(dentry, inode); 1777edb20fb5SJames Morris /* bump link count on parent directory, too */ 1778ce0b16ddSDavid Howells inc_nlink(d_inode(dir)); 1779b77a493bSEric Paris 1780a1c2aa1eSAl Viro return dentry; 17811da177e4SLinus Torvalds } 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvalds static int sel_fill_super(struct super_block *sb, void *data, int silent) 17841da177e4SLinus Torvalds { 17851da177e4SLinus Torvalds int ret; 17861da177e4SLinus Torvalds struct dentry *dentry; 1787a1c2aa1eSAl Viro struct inode *inode; 17881da177e4SLinus Torvalds struct inode_security_struct *isec; 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds static struct tree_descr selinux_files[] = { 17911da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 17921da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1793ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 17941da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 17951da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 17961da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 17971da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 17981da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 17991da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 18001da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 18011da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 18021da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 18031da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 18043f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 18053f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 180611904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 180772e8c859SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, 1808f9df6458SAndrew Perepechko [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, 1809f9df6458SAndrew Perepechko S_IWUGO}, 18101da177e4SLinus Torvalds /* last one */ {""} 18111da177e4SLinus Torvalds }; 18121da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 18131da177e4SLinus Torvalds if (ret) 1814161ce45aSJames Morris goto err; 18151da177e4SLinus Torvalds 1816a1c2aa1eSAl Viro bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &sel_last_ino); 1817a1c2aa1eSAl Viro if (IS_ERR(bool_dir)) { 1818a1c2aa1eSAl Viro ret = PTR_ERR(bool_dir); 1819a1c2aa1eSAl Viro bool_dir = NULL; 1820161ce45aSJames Morris goto err; 1821a1c2aa1eSAl Viro } 18221da177e4SLinus Torvalds 1823b77a493bSEric Paris ret = -ENOMEM; 18241da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1825b77a493bSEric Paris if (!dentry) 1826161ce45aSJames Morris goto err; 18271da177e4SLinus Torvalds 1828161ce45aSJames Morris ret = -ENOMEM; 1829b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1830b77a493bSEric Paris if (!inode) 1831161ce45aSJames Morris goto err; 1832b77a493bSEric Paris 18336174eafcSJames Carter inode->i_ino = ++sel_last_ino; 18341da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 18351da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 18361da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 18371da177e4SLinus Torvalds isec->initialized = 1; 18381da177e4SLinus Torvalds 18391da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 18401da177e4SLinus Torvalds d_add(dentry, inode); 1841765927b2SAl Viro selinux_null.dentry = dentry; 18421da177e4SLinus Torvalds 1843a1c2aa1eSAl Viro dentry = sel_make_dir(sb->s_root, "avc", &sel_last_ino); 1844a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1845a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1846161ce45aSJames Morris goto err; 1847a1c2aa1eSAl Viro } 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 18501da177e4SLinus Torvalds if (ret) 1851161ce45aSJames Morris goto err; 1852f0ee2e46SJames Carter 1853a1c2aa1eSAl Viro dentry = sel_make_dir(sb->s_root, "initial_contexts", &sel_last_ino); 1854a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1855a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1856f0ee2e46SJames Carter goto err; 1857a1c2aa1eSAl Viro } 1858f0ee2e46SJames Carter 1859f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1860f0ee2e46SJames Carter if (ret) 1861f0ee2e46SJames Carter goto err; 1862f0ee2e46SJames Carter 1863a1c2aa1eSAl Viro class_dir = sel_make_dir(sb->s_root, "class", &sel_last_ino); 1864a1c2aa1eSAl Viro if (IS_ERR(class_dir)) { 1865a1c2aa1eSAl Viro ret = PTR_ERR(class_dir); 1866a1c2aa1eSAl Viro class_dir = NULL; 1867e47c8fc5SChristopher J. PeBenito goto err; 1868a1c2aa1eSAl Viro } 1869e47c8fc5SChristopher J. PeBenito 1870a1c2aa1eSAl Viro policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", &sel_last_ino); 1871a1c2aa1eSAl Viro if (IS_ERR(policycap_dir)) { 1872a1c2aa1eSAl Viro ret = PTR_ERR(policycap_dir); 1873a1c2aa1eSAl Viro policycap_dir = NULL; 1874e47c8fc5SChristopher J. PeBenito goto err; 1875a1c2aa1eSAl Viro } 1876b77a493bSEric Paris return 0; 1877161ce45aSJames Morris err: 1878744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", 1879744ba35eSEric Paris __func__); 1880b77a493bSEric Paris return ret; 18811da177e4SLinus Torvalds } 18821da177e4SLinus Torvalds 1883fc14f2feSAl Viro static struct dentry *sel_mount(struct file_system_type *fs_type, 1884fc14f2feSAl Viro int flags, const char *dev_name, void *data) 18851da177e4SLinus Torvalds { 1886fc14f2feSAl Viro return mount_single(fs_type, flags, data, sel_fill_super); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds 18891da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 18901da177e4SLinus Torvalds .name = "selinuxfs", 1891fc14f2feSAl Viro .mount = sel_mount, 18921da177e4SLinus Torvalds .kill_sb = kill_litter_super, 18931da177e4SLinus Torvalds }; 18941da177e4SLinus Torvalds 18951da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 18961da177e4SLinus Torvalds 18971da177e4SLinus Torvalds static int __init init_sel_fs(void) 18981da177e4SLinus Torvalds { 18991da177e4SLinus Torvalds int err; 19001da177e4SLinus Torvalds 19011da177e4SLinus Torvalds if (!selinux_enabled) 19021da177e4SLinus Torvalds return 0; 19037a627e3bSGreg Kroah-Hartman 1904f9bb4882SEric W. Biederman err = sysfs_create_mount_point(fs_kobj, "selinux"); 1905f9bb4882SEric W. Biederman if (err) 1906f9bb4882SEric W. Biederman return err; 19077a627e3bSGreg Kroah-Hartman 19081da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 19097a627e3bSGreg Kroah-Hartman if (err) { 1910f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 1911b77a493bSEric Paris return err; 19127a627e3bSGreg Kroah-Hartman } 1913b77a493bSEric Paris 1914765927b2SAl Viro selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); 19151da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 19161da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 19171da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 19181da177e4SLinus Torvalds selinuxfs_mount = NULL; 19191da177e4SLinus Torvalds } 1920b77a493bSEric Paris 19211da177e4SLinus Torvalds return err; 19221da177e4SLinus Torvalds } 19231da177e4SLinus Torvalds 19241da177e4SLinus Torvalds __initcall(init_sel_fs); 19251da177e4SLinus Torvalds 19261da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 19271da177e4SLinus Torvalds void exit_sel_fs(void) 19281da177e4SLinus Torvalds { 1929f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 1930423e0ab0STim Chen kern_unmount(selinuxfs_mount); 19311da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds #endif 1934