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trunk/caitsith-patch/security/caitsith/permission.c (diff) trunk/caitsith-patch/caitsith/mclsm.c trunk/caitsith-patch/caitsith/lsm-2.6.27.c (diff) trunk/caitsith-patch/caitsith/lsm-2.6.29.c (diff) trunk/caitsith-patch/caitsith/lsm.c (diff) trunk/caitsith-patch/caitsith/lsm-4.2.c (diff) trunk/caitsith-patch/caitsith/probe.c (diff) trunk/caitsith-patch/caitsith/lsm-2.6.27-vfs.c (diff)| @@ -1450,7 +1450,7 @@ | ||
| 1450 | 1450 | static int cs_old_open_permission(struct dentry *dentry, struct vfsmount *mnt, |
| 1451 | 1451 | const int flag) |
| 1452 | 1452 | { |
| 1453 | - struct path path = { mnt, dentry }; | |
| 1453 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1454 | 1454 | return cs_open_permission(&path, flag); |
| 1455 | 1455 | } |
| 1456 | 1456 |
| @@ -1590,7 +1590,7 @@ | ||
| 1590 | 1590 | static int cs_chmod_permission(struct dentry *dentry, struct vfsmount *vfsmnt, |
| 1591 | 1591 | mode_t mode) |
| 1592 | 1592 | { |
| 1593 | - struct path path = { vfsmnt, dentry }; | |
| 1593 | + struct path path = { .mnt = vfsmnt, .dentry = dentry }; | |
| 1594 | 1594 | return cs_path_number_perm(CS_MAC_CHMOD, &path, mode & S_IALLUGO); |
| 1595 | 1595 | } |
| 1596 | 1596 |
| @@ -1610,7 +1610,7 @@ | ||
| 1610 | 1610 | kuid_t user, kgid_t group) |
| 1611 | 1611 | { |
| 1612 | 1612 | int error = 0; |
| 1613 | - struct path path = { vfsmnt, dentry }; | |
| 1613 | + struct path path = { .mnt = vfsmnt, .dentry = dentry }; | |
| 1614 | 1614 | if (uid_valid(user)) |
| 1615 | 1615 | error = cs_path_number_perm(CS_MAC_CHOWN, &path, |
| 1616 | 1616 | from_kuid(&init_user_ns, user)); |
| @@ -1636,7 +1636,7 @@ | ||
| 1636 | 1636 | uid_t user, gid_t group) |
| 1637 | 1637 | { |
| 1638 | 1638 | int error = 0; |
| 1639 | - struct path path = { vfsmnt, dentry }; | |
| 1639 | + struct path path = { .mnt = vfsmnt, .dentry = dentry }; | |
| 1640 | 1640 | if (user == (uid_t) -1 && group == (gid_t) -1) |
| 1641 | 1641 | return 0; |
| 1642 | 1642 | if (user != (uid_t) -1) |
| @@ -1708,7 +1708,7 @@ | ||
| 1708 | 1708 | */ |
| 1709 | 1709 | static int cs_umount_permission(struct vfsmount *mnt, int flags) |
| 1710 | 1710 | { |
| 1711 | - struct path path = { mnt, mnt->mnt_root }; | |
| 1711 | + struct path path = { .mnt = mnt, .dentry = mnt->mnt_root }; | |
| 1712 | 1712 | return cs_path_number_perm(CS_MAC_UMOUNT, &path, flags); |
| 1713 | 1713 | } |
| 1714 | 1714 |
| @@ -1727,7 +1727,7 @@ | ||
| 1727 | 1727 | { |
| 1728 | 1728 | int error = 0; |
| 1729 | 1729 | const unsigned int perm = mode & S_IALLUGO; |
| 1730 | - struct path path = { mnt, dentry }; | |
| 1730 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1731 | 1731 | switch (mode & S_IFMT) { |
| 1732 | 1732 | case S_IFCHR: |
| 1733 | 1733 | error = cs_mkdev_perm(CS_MAC_MKCHAR, &path, perm, dev); |
| @@ -1761,7 +1761,7 @@ | ||
| 1761 | 1761 | static int cs_mkdir_permission(struct dentry *dentry, struct vfsmount *mnt, |
| 1762 | 1762 | unsigned int mode) |
| 1763 | 1763 | { |
| 1764 | - struct path path = { mnt, dentry }; | |
| 1764 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1765 | 1765 | return cs_path_number_perm(CS_MAC_MKDIR, &path, mode); |
| 1766 | 1766 | } |
| 1767 | 1767 |
| @@ -1775,7 +1775,7 @@ | ||
| 1775 | 1775 | */ |
| 1776 | 1776 | static int cs_rmdir_permission(struct dentry *dentry, struct vfsmount *mnt) |
| 1777 | 1777 | { |
| 1778 | - struct path path = { mnt, dentry }; | |
| 1778 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1779 | 1779 | return cs_path_perm(CS_MAC_RMDIR, &path); |
| 1780 | 1780 | } |
| 1781 | 1781 |
| @@ -1789,7 +1789,7 @@ | ||
| 1789 | 1789 | */ |
| 1790 | 1790 | static int cs_unlink_permission(struct dentry *dentry, struct vfsmount *mnt) |
| 1791 | 1791 | { |
| 1792 | - struct path path = { mnt, dentry }; | |
| 1792 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1793 | 1793 | return cs_path_perm(CS_MAC_UNLINK, &path); |
| 1794 | 1794 | } |
| 1795 | 1795 |
| @@ -1805,7 +1805,7 @@ | ||
| 1805 | 1805 | */ |
| 1806 | 1806 | static int cs_getattr_permission(struct vfsmount *mnt, struct dentry *dentry) |
| 1807 | 1807 | { |
| 1808 | - struct path path = { mnt, dentry }; | |
| 1808 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1809 | 1809 | return cs_path_perm(CS_MAC_GETATTR, &path); |
| 1810 | 1810 | } |
| 1811 | 1811 |
| @@ -1821,7 +1821,7 @@ | ||
| 1821 | 1821 | */ |
| 1822 | 1822 | static int cs_truncate_permission(struct dentry *dentry, struct vfsmount *mnt) |
| 1823 | 1823 | { |
| 1824 | - struct path path = { mnt, dentry }; | |
| 1824 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1825 | 1825 | return cs_path_perm(CS_MAC_TRUNCATE, &path); |
| 1826 | 1826 | } |
| 1827 | 1827 |
| @@ -1838,8 +1838,8 @@ | ||
| 1838 | 1838 | struct dentry *new_dentry, |
| 1839 | 1839 | struct vfsmount *mnt) |
| 1840 | 1840 | { |
| 1841 | - struct path old = { mnt, old_dentry }; | |
| 1842 | - struct path new = { mnt, new_dentry }; | |
| 1841 | + struct path old = { .mnt = mnt, .dentry = old_dentry }; | |
| 1842 | + struct path new = { .mnt = mnt, .dentry = new_dentry }; | |
| 1843 | 1843 | return cs_path2_perm(CS_MAC_RENAME, &old, &new); |
| 1844 | 1844 | } |
| 1845 | 1845 |
| @@ -1855,8 +1855,8 @@ | ||
| 1855 | 1855 | static int cs_link_permission(struct dentry *old_dentry, |
| 1856 | 1856 | struct dentry *new_dentry, struct vfsmount *mnt) |
| 1857 | 1857 | { |
| 1858 | - struct path old = { mnt, old_dentry }; | |
| 1859 | - struct path new = { mnt, new_dentry }; | |
| 1858 | + struct path old = { .mnt = mnt, .dentry = old_dentry }; | |
| 1859 | + struct path new = { .mnt = mnt, .dentry = new_dentry }; | |
| 1860 | 1860 | return cs_path2_perm(CS_MAC_LINK, &old, &new); |
| 1861 | 1861 | } |
| 1862 | 1862 |
| @@ -1872,7 +1872,7 @@ | ||
| 1872 | 1872 | */ |
| 1873 | 1873 | static int cs_open_exec_permission(struct dentry *dentry, struct vfsmount *mnt) |
| 1874 | 1874 | { |
| 1875 | - struct path path = { mnt, dentry }; | |
| 1875 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1876 | 1876 | return (cs_current_flags() & CS_TASK_IS_IN_EXECVE) ? |
| 1877 | 1877 | cs_open_permission(&path, O_RDONLY + 1) : 0; |
| 1878 | 1878 | } |
| @@ -1887,7 +1887,7 @@ | ||
| 1887 | 1887 | */ |
| 1888 | 1888 | static int cs_uselib_permission(struct dentry *dentry, struct vfsmount *mnt) |
| 1889 | 1889 | { |
| 1890 | - struct path path = { mnt, dentry }; | |
| 1890 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 1891 | 1891 | return cs_open_permission(&path, O_RDONLY + 1); |
| 1892 | 1892 | } |
| 1893 | 1893 |
| @@ -1,1508 +0,0 @@ | ||
| 1 | -/* | |
| 2 | - * mclsm.c | |
| 3 | - * | |
| 4 | - * Copyright (C) 2010-2013 Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | |
| 5 | - * | |
| 6 | - * Version: 0.1.15 2015/08/06 | |
| 7 | - */ | |
| 8 | - | |
| 9 | -#include "caitsith.h" | |
| 10 | -#include "probe.h" | |
| 11 | - | |
| 12 | -/* Prototype definition. */ | |
| 13 | -static void cs_task_security_gc(void); | |
| 14 | -static int cs_copy_cred_security(const struct cred *new, | |
| 15 | - const struct cred *old, gfp_t gfp); | |
| 16 | -static struct cs_security *cs_find_cred_security(const struct cred *cred); | |
| 17 | -static DEFINE_SPINLOCK(cs_task_security_list_lock); | |
| 18 | -static atomic_t cs_in_execve_tasks = ATOMIC_INIT(0); | |
| 19 | -/* | |
| 20 | - * List of "struct cs_security" for "struct pid". | |
| 21 | - * | |
| 22 | - * All instances on this list is guaranteed that "struct cs_security"->pid != | |
| 23 | - * NULL. Also, instances on this list that are in execve() are guaranteed that | |
| 24 | - * "struct cs_security"->cred remembers "struct linux_binprm"->cred with a | |
| 25 | - * refcount on "struct linux_binprm"->cred. | |
| 26 | - */ | |
| 27 | -struct list_head cs_task_security_list[CS_MAX_TASK_SECURITY_HASH]; | |
| 28 | -/* | |
| 29 | - * List of "struct cs_security" for "struct cred". | |
| 30 | - * | |
| 31 | - * Since the number of "struct cred" is nearly equals to the number of | |
| 32 | - * "struct pid", we allocate hash tables like cs_task_security_list. | |
| 33 | - * | |
| 34 | - * All instances on this list are guaranteed that "struct cs_security"->pid == | |
| 35 | - * NULL and "struct cs_security"->cred != NULL. | |
| 36 | - */ | |
| 37 | -static struct list_head cs_cred_security_list[CS_MAX_TASK_SECURITY_HASH]; | |
| 38 | - | |
| 39 | -/* Dummy security context for avoiding NULL pointer dereference. */ | |
| 40 | -static struct cs_security cs_oom_security = { | |
| 41 | - .cs_domain_info = &cs_kernel_domain | |
| 42 | -}; | |
| 43 | - | |
| 44 | -/* Dummy security context for avoiding NULL pointer dereference. */ | |
| 45 | -static struct cs_security cs_default_security = { | |
| 46 | - .cs_domain_info = &cs_kernel_domain | |
| 47 | -}; | |
| 48 | - | |
| 49 | -/* For exporting variables and functions. */ | |
| 50 | -struct caitsith_exports caitsith_exports; | |
| 51 | - | |
| 52 | -/* Original hooks. */ | |
| 53 | -static union security_list_options original_cred_prepare; | |
| 54 | -static union security_list_options original_cred_free; | |
| 55 | -static union security_list_options original_cred_alloc_blank; | |
| 56 | - | |
| 57 | -#if !defined(CONFIG_CAITSITH_DEBUG) | |
| 58 | -#define cs_debug_trace(pos) do { } while (0) | |
| 59 | -#else | |
| 60 | -#define cs_debug_trace(pos) \ | |
| 61 | - do { \ | |
| 62 | - static bool done; \ | |
| 63 | - if (!done) { \ | |
| 64 | - printk(KERN_INFO \ | |
| 65 | - "CAITSITH: Debug trace: " pos " of 4\n"); \ | |
| 66 | - done = true; \ | |
| 67 | - } \ | |
| 68 | - } while (0) | |
| 69 | -#endif | |
| 70 | - | |
| 71 | -/** | |
| 72 | - * cs_clear_execve - Release memory used by do_execve(). | |
| 73 | - * | |
| 74 | - * @ret: 0 if do_execve() succeeded, negative value otherwise. | |
| 75 | - * @security: Pointer to "struct cs_security". | |
| 76 | - * | |
| 77 | - * Returns nothing. | |
| 78 | - */ | |
| 79 | -static void cs_clear_execve(int ret, struct cs_security *security) | |
| 80 | -{ | |
| 81 | - struct cs_request_info *r; | |
| 82 | - if (security == &cs_default_security || security == &cs_oom_security) | |
| 83 | - return; | |
| 84 | - r = security->r; | |
| 85 | - security->r = NULL; | |
| 86 | - if (!r) | |
| 87 | - return; | |
| 88 | - atomic_dec(&cs_in_execve_tasks); | |
| 89 | - cs_finish_execve(ret, r); | |
| 90 | -} | |
| 91 | - | |
| 92 | -/** | |
| 93 | - * cs_rcu_free - RCU callback for releasing "struct cs_security". | |
| 94 | - * | |
| 95 | - * @rcu: Pointer to "struct rcu_head". | |
| 96 | - * | |
| 97 | - * Returns nothing. | |
| 98 | - */ | |
| 99 | -static void cs_rcu_free(struct rcu_head *rcu) | |
| 100 | -{ | |
| 101 | - struct cs_security *ptr = container_of(rcu, typeof(*ptr), rcu); | |
| 102 | - struct cs_request_info *r = ptr->r; | |
| 103 | - /* | |
| 104 | - * If this security context was associated with "struct pid" and | |
| 105 | - * ptr->cs_flags has CS_TASK_IS_IN_EXECVE set, it indicates that a | |
| 106 | - * "struct task_struct" associated with this security context exited | |
| 107 | - * immediately after do_execve() has failed. | |
| 108 | - */ | |
| 109 | - if (ptr->pid && (ptr->cs_flags & CS_TASK_IS_IN_EXECVE)) { | |
| 110 | - cs_debug_trace("1"); | |
| 111 | - atomic_dec(&cs_in_execve_tasks); | |
| 112 | - } | |
| 113 | - /* | |
| 114 | - * If this security context was associated with "struct pid", | |
| 115 | - * drop refcount obtained by get_pid() in cs_find_task_security(). | |
| 116 | - */ | |
| 117 | - if (ptr->pid) { | |
| 118 | - cs_debug_trace("2"); | |
| 119 | - put_pid(ptr->pid); | |
| 120 | - } | |
| 121 | - if (r) { | |
| 122 | - cs_debug_trace("3"); | |
| 123 | - kfree(r->handler_path); | |
| 124 | - kfree(r); | |
| 125 | - } | |
| 126 | - kfree(ptr); | |
| 127 | -} | |
| 128 | - | |
| 129 | -/** | |
| 130 | - * cs_del_security - Release "struct cs_security". | |
| 131 | - * | |
| 132 | - * @ptr: Pointer to "struct cs_security". | |
| 133 | - * | |
| 134 | - * Returns nothing. | |
| 135 | - */ | |
| 136 | -static void cs_del_security(struct cs_security *ptr) | |
| 137 | -{ | |
| 138 | - unsigned long flags; | |
| 139 | - if (ptr == &cs_default_security || ptr == &cs_oom_security) | |
| 140 | - return; | |
| 141 | - spin_lock_irqsave(&cs_task_security_list_lock, flags); | |
| 142 | - list_del_rcu(&ptr->list); | |
| 143 | - spin_unlock_irqrestore(&cs_task_security_list_lock, flags); | |
| 144 | - call_rcu(&ptr->rcu, cs_rcu_free); | |
| 145 | -} | |
| 146 | - | |
| 147 | -/** | |
| 148 | - * cs_add_cred_security - Add "struct cs_security" to list. | |
| 149 | - * | |
| 150 | - * @ptr: Pointer to "struct cs_security". | |
| 151 | - * | |
| 152 | - * Returns nothing. | |
| 153 | - */ | |
| 154 | -static void cs_add_cred_security(struct cs_security *ptr) | |
| 155 | -{ | |
| 156 | - unsigned long flags; | |
| 157 | - struct list_head *list = &cs_cred_security_list | |
| 158 | - [hash_ptr((void *) ptr->cred, CS_TASK_SECURITY_HASH_BITS)]; | |
| 159 | -#ifdef CONFIG_CAITSITH_DEBUG | |
| 160 | - if (ptr->pid) | |
| 161 | - printk(KERN_INFO "CAITSITH: \"struct cs_security\"->pid != NULL" | |
| 162 | - "\n"); | |
| 163 | -#endif | |
| 164 | - ptr->pid = NULL; | |
| 165 | - spin_lock_irqsave(&cs_task_security_list_lock, flags); | |
| 166 | - list_add_rcu(&ptr->list, list); | |
| 167 | - spin_unlock_irqrestore(&cs_task_security_list_lock, flags); | |
| 168 | -} | |
| 169 | - | |
| 170 | -/** | |
| 171 | - * cs_task_create - Make snapshot of security context for new task. | |
| 172 | - * | |
| 173 | - * @clone_flags: Flags passed to clone(). | |
| 174 | - * | |
| 175 | - * Returns 0 on success, negative value otherwise. | |
| 176 | - */ | |
| 177 | -static int cs_task_create(unsigned long clone_flags) | |
| 178 | -{ | |
| 179 | - struct cs_security *old_security; | |
| 180 | - struct cs_security *new_security; | |
| 181 | - struct cred *cred = prepare_creds(); | |
| 182 | - if (!cred) | |
| 183 | - return -ENOMEM; | |
| 184 | - old_security = cs_find_task_security(current); | |
| 185 | - new_security = cs_find_cred_security(cred); | |
| 186 | - new_security->cs_domain_info = old_security->cs_domain_info; | |
| 187 | - new_security->cs_flags = old_security->cs_flags; | |
| 188 | - return commit_creds(cred); | |
| 189 | -} | |
| 190 | - | |
| 191 | -/** | |
| 192 | - * cs_cred_prepare - Allocate memory for new credentials. | |
| 193 | - * | |
| 194 | - * @new: Pointer to "struct cred". | |
| 195 | - * @old: Pointer to "struct cred". | |
| 196 | - * @gfp: Memory allocation flags. | |
| 197 | - * | |
| 198 | - * Returns 0 on success, negative value otherwise. | |
| 199 | - */ | |
| 200 | -static int cs_cred_prepare(struct cred *new, const struct cred *old, | |
| 201 | - gfp_t gfp) | |
| 202 | -{ | |
| 203 | - int rc1; | |
| 204 | - /* | |
| 205 | - * For checking whether reverting domain transition is needed or not. | |
| 206 | - * | |
| 207 | - * See cs_find_task_security() for reason. | |
| 208 | - */ | |
| 209 | - if (gfp == GFP_KERNEL) | |
| 210 | - cs_find_task_security(current); | |
| 211 | - rc1 = cs_copy_cred_security(new, old, gfp); | |
| 212 | - if (gfp == GFP_KERNEL) | |
| 213 | - cs_task_security_gc(); | |
| 214 | - if (original_cred_prepare.cred_prepare) { | |
| 215 | - const int rc2 = original_cred_prepare.cred_prepare(new, old, | |
| 216 | - gfp); | |
| 217 | - if (rc2) { | |
| 218 | - cs_del_security(cs_find_cred_security(new)); | |
| 219 | - return rc2; | |
| 220 | - } | |
| 221 | - } | |
| 222 | - return rc1; | |
| 223 | -} | |
| 224 | - | |
| 225 | -/** | |
| 226 | - * cs_cred_free - Release memory used by credentials. | |
| 227 | - * | |
| 228 | - * @cred: Pointer to "struct cred". | |
| 229 | - * | |
| 230 | - * Returns nothing. | |
| 231 | - */ | |
| 232 | -static void cs_cred_free(struct cred *cred) | |
| 233 | -{ | |
| 234 | - if (original_cred_free.cred_free) | |
| 235 | - original_cred_free.cred_free(cred); | |
| 236 | - cs_del_security(cs_find_cred_security(cred)); | |
| 237 | -} | |
| 238 | - | |
| 239 | -/** | |
| 240 | - * cs_alloc_cred_security - Allocate memory for new credentials. | |
| 241 | - * | |
| 242 | - * @cred: Pointer to "struct cred". | |
| 243 | - * @gfp: Memory allocation flags. | |
| 244 | - * | |
| 245 | - * Returns 0 on success, negative value otherwise. | |
| 246 | - */ | |
| 247 | -static int cs_alloc_cred_security(const struct cred *cred, gfp_t gfp) | |
| 248 | -{ | |
| 249 | - struct cs_security *new_security = kzalloc(sizeof(*new_security), | |
| 250 | - gfp); | |
| 251 | - if (!new_security) | |
| 252 | - return -ENOMEM; | |
| 253 | - new_security->cred = cred; | |
| 254 | - cs_add_cred_security(new_security); | |
| 255 | - return 0; | |
| 256 | -} | |
| 257 | - | |
| 258 | -/** | |
| 259 | - * cs_cred_alloc_blank - Allocate memory for new credentials. | |
| 260 | - * | |
| 261 | - * @new: Pointer to "struct cred". | |
| 262 | - * @gfp: Memory allocation flags. | |
| 263 | - * | |
| 264 | - * Returns 0 on success, negative value otherwise. | |
| 265 | - */ | |
| 266 | -static int cs_cred_alloc_blank(struct cred *new, gfp_t gfp) | |
| 267 | -{ | |
| 268 | - const int rc1 = cs_alloc_cred_security(new, gfp); | |
| 269 | - if (original_cred_alloc_blank.cred_alloc_blank) { | |
| 270 | - const int rc2 = original_cred_alloc_blank. | |
| 271 | - cred_alloc_blank(new, gfp); | |
| 272 | - if (rc2) { | |
| 273 | - cs_del_security(cs_find_cred_security(new)); | |
| 274 | - return rc2; | |
| 275 | - } | |
| 276 | - } | |
| 277 | - return rc1; | |
| 278 | -} | |
| 279 | - | |
| 280 | -/** | |
| 281 | - * cs_cred_transfer - Transfer "struct cs_security" between credentials. | |
| 282 | - * | |
| 283 | - * @new: Pointer to "struct cred". | |
| 284 | - * @old: Pointer to "struct cred". | |
| 285 | - * | |
| 286 | - * Returns nothing. | |
| 287 | - */ | |
| 288 | -static void cs_cred_transfer(struct cred *new, const struct cred *old) | |
| 289 | -{ | |
| 290 | - struct cs_security *new_security = cs_find_cred_security(new); | |
| 291 | - struct cs_security *old_security = cs_find_cred_security(old); | |
| 292 | - if (new_security == &cs_default_security || | |
| 293 | - new_security == &cs_oom_security || | |
| 294 | - old_security == &cs_default_security || | |
| 295 | - old_security == &cs_oom_security) | |
| 296 | - return; | |
| 297 | - new_security->cs_flags = old_security->cs_flags; | |
| 298 | - new_security->cs_domain_info = old_security->cs_domain_info; | |
| 299 | -} | |
| 300 | - | |
| 301 | -/** | |
| 302 | - * cs_bprm_committing_creds - A hook which is called when do_execve() succeeded. | |
| 303 | - * | |
| 304 | - * @bprm: Pointer to "struct linux_binprm". | |
| 305 | - * | |
| 306 | - * Returns nothing. | |
| 307 | - */ | |
| 308 | -static void cs_bprm_committing_creds(struct linux_binprm *bprm) | |
| 309 | -{ | |
| 310 | - struct cs_security *old_security = cs_current_security(); | |
| 311 | - struct cs_security *new_security; | |
| 312 | - if (old_security == &cs_default_security || | |
| 313 | - old_security == &cs_oom_security) | |
| 314 | - return; | |
| 315 | - cs_clear_execve(0, old_security); | |
| 316 | - /* Update current task's cred's domain for future fork(). */ | |
| 317 | - new_security = cs_find_cred_security(bprm->cred); | |
| 318 | - new_security->cs_flags = old_security->cs_flags; | |
| 319 | - new_security->cs_domain_info = old_security->cs_domain_info; | |
| 320 | -} | |
| 321 | - | |
| 322 | -#ifndef CONFIG_CAITSITH_OMIT_USERSPACE_LOADER | |
| 323 | - | |
| 324 | -/** | |
| 325 | - * cs_policy_loader_exists - Check whether /sbin/caitsith-init exists. | |
| 326 | - * | |
| 327 | - * Returns true if /sbin/caitsith-init exists, false otherwise. | |
| 328 | - */ | |
| 329 | -static _Bool cs_policy_loader_exists(void) | |
| 330 | -{ | |
| 331 | - struct path path; | |
| 332 | - if (kern_path(CONFIG_CAITSITH_POLICY_LOADER, LOOKUP_FOLLOW, &path) | |
| 333 | - == 0) { | |
| 334 | - path_put(&path); | |
| 335 | - return 1; | |
| 336 | - } | |
| 337 | - printk(KERN_INFO "Not activating CaitSith as %s does not exist.\n", | |
| 338 | - CONFIG_CAITSITH_POLICY_LOADER); | |
| 339 | - return 0; | |
| 340 | -} | |
| 341 | - | |
| 342 | -/** | |
| 343 | - * cs_load_policy - Run external policy loader to load policy. | |
| 344 | - * | |
| 345 | - * @filename: The program about to start. | |
| 346 | - * | |
| 347 | - * Returns nothing. | |
| 348 | - * | |
| 349 | - * This function checks whether @filename is /sbin/init, and if so | |
| 350 | - * invoke /sbin/caitsith-init and wait for the termination of | |
| 351 | - * /sbin/caitsith-init and then continues invocation of /sbin/init. | |
| 352 | - * /sbin/caitsith-init reads policy files in /etc/caitsith/ directory and | |
| 353 | - * writes to /proc/caitsith/ interfaces. | |
| 354 | - */ | |
| 355 | -static void cs_load_policy(const char *filename) | |
| 356 | -{ | |
| 357 | - static _Bool done; | |
| 358 | - if (done) | |
| 359 | - return; | |
| 360 | - if (strcmp(filename, CONFIG_CAITSITH_ACTIVATION_TRIGGER)) | |
| 361 | - return; | |
| 362 | - if (!cs_policy_loader_exists()) | |
| 363 | - return; | |
| 364 | - done = 1; | |
| 365 | - { | |
| 366 | - char *argv[2]; | |
| 367 | - char *envp[3]; | |
| 368 | - printk(KERN_INFO "Calling %s to load policy. Please wait.\n", | |
| 369 | - CONFIG_CAITSITH_POLICY_LOADER); | |
| 370 | - argv[0] = (char *) CONFIG_CAITSITH_POLICY_LOADER; | |
| 371 | - argv[1] = NULL; | |
| 372 | - envp[0] = "HOME=/"; | |
| 373 | - envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
| 374 | - envp[2] = NULL; | |
| 375 | - call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC); | |
| 376 | - } | |
| 377 | - cs_check_profile(); | |
| 378 | -} | |
| 379 | - | |
| 380 | -#endif | |
| 381 | - | |
| 382 | -/** | |
| 383 | - * cs_bprm_check_security - Check permission for execve(). | |
| 384 | - * | |
| 385 | - * @bprm: Pointer to "struct linux_binprm". | |
| 386 | - * | |
| 387 | - * Returns 0 on success, negative value otherwise. | |
| 388 | - */ | |
| 389 | -static int cs_bprm_check_security(struct linux_binprm *bprm) | |
| 390 | -{ | |
| 391 | - struct cs_security *security = cs_current_security(); | |
| 392 | - int rc; | |
| 393 | - if (security == &cs_default_security || security == &cs_oom_security) | |
| 394 | - return -ENOMEM; | |
| 395 | - if (security->r) | |
| 396 | - return 0; | |
| 397 | -#ifndef CONFIG_CAITSITH_OMIT_USERSPACE_LOADER | |
| 398 | - if (!cs_policy_loaded) | |
| 399 | - cs_load_policy(bprm->filename); | |
| 400 | -#endif | |
| 401 | - rc = cs_start_execve(bprm, &security->r); | |
| 402 | - if (security->r) | |
| 403 | - atomic_inc(&cs_in_execve_tasks); | |
| 404 | - return rc; | |
| 405 | -} | |
| 406 | - | |
| 407 | -/** | |
| 408 | - * cs_file_open - Check permission for open(). | |
| 409 | - * | |
| 410 | - * @f: Pointer to "struct file". | |
| 411 | - * @cred: Pointer to "struct cred". | |
| 412 | - * | |
| 413 | - * Returns 0 on success, negative value otherwise. | |
| 414 | - */ | |
| 415 | -static int cs_file_open(struct file *f, const struct cred *cred) | |
| 416 | -{ | |
| 417 | - return cs_open_permission(&f->f_path, f->f_flags); | |
| 418 | -} | |
| 419 | - | |
| 420 | -#ifdef CONFIG_SECURITY_PATH | |
| 421 | - | |
| 422 | -/** | |
| 423 | - * cs_path_chown - Check permission for chown()/chgrp(). | |
| 424 | - * | |
| 425 | - * @path: Pointer to "struct path". | |
| 426 | - * @user: User ID. | |
| 427 | - * @group: Group ID. | |
| 428 | - * | |
| 429 | - * Returns 0 on success, negative value otherwise. | |
| 430 | - */ | |
| 431 | -static int cs_path_chown(struct path *path, kuid_t user, kgid_t group) | |
| 432 | -{ | |
| 433 | - return cs_chown_permission(path, user, group); | |
| 434 | -} | |
| 435 | - | |
| 436 | -/** | |
| 437 | - * cs_path_chmod - Check permission for chmod(). | |
| 438 | - * | |
| 439 | - * @path: Pointer to "struct path". | |
| 440 | - * @mode: Mode. | |
| 441 | - * | |
| 442 | - * Returns 0 on success, negative value otherwise. | |
| 443 | - */ | |
| 444 | -static int cs_path_chmod(struct path *path, umode_t mode) | |
| 445 | -{ | |
| 446 | - return cs_chmod_permission(path, mode); | |
| 447 | -} | |
| 448 | - | |
| 449 | -/** | |
| 450 | - * cs_path_chroot - Check permission for chroot(). | |
| 451 | - * | |
| 452 | - * @path: Pointer to "struct path". | |
| 453 | - * | |
| 454 | - * Returns 0 on success, negative value otherwise. | |
| 455 | - */ | |
| 456 | -static int cs_path_chroot(struct path *path) | |
| 457 | -{ | |
| 458 | - return cs_chroot_permission(path); | |
| 459 | -} | |
| 460 | - | |
| 461 | -/** | |
| 462 | - * cs_path_truncate - Check permission for truncate(). | |
| 463 | - * | |
| 464 | - * @path: Pointer to "struct path". | |
| 465 | - * | |
| 466 | - * Returns 0 on success, negative value otherwise. | |
| 467 | - */ | |
| 468 | -static int cs_path_truncate(struct path *path) | |
| 469 | -{ | |
| 470 | - return cs_truncate_permission(path); | |
| 471 | -} | |
| 472 | - | |
| 473 | -#else | |
| 474 | - | |
| 475 | -/** | |
| 476 | - * cs_inode_setattr - Check permission for chown()/chgrp()/chmod()/truncate(). | |
| 477 | - * | |
| 478 | - * @dentry: Pointer to "struct dentry". | |
| 479 | - * @attr: Pointer to "struct iattr". | |
| 480 | - * | |
| 481 | - * Returns 0 on success, negative value otherwise. | |
| 482 | - */ | |
| 483 | -static int cs_inode_setattr(struct dentry *dentry, struct iattr *attr) | |
| 484 | -{ | |
| 485 | - int rc = 0; | |
| 486 | - struct path path = { NULL, dentry }; | |
| 487 | - if (attr->ia_valid & ATTR_UID) | |
| 488 | - rc = cs_chown_permission(&path, attr->ia_uid, INVALID_GID); | |
| 489 | - if (!rc && (attr->ia_valid & ATTR_GID)) | |
| 490 | - rc = cs_chown_permission(&path, INVALID_UID, attr->ia_gid); | |
| 491 | - if (!rc && (attr->ia_valid & ATTR_MODE)) | |
| 492 | - rc = cs_chmod_permission(&path, attr->ia_mode); | |
| 493 | - if (!rc && (attr->ia_valid & ATTR_SIZE)) | |
| 494 | - rc = cs_truncate_permission(&path); | |
| 495 | - return rc; | |
| 496 | -} | |
| 497 | - | |
| 498 | -#endif | |
| 499 | - | |
| 500 | -/** | |
| 501 | - * cs_inode_getattr - Check permission for stat(). | |
| 502 | - * | |
| 503 | - * @path: Pointer to "struct path". | |
| 504 | - * | |
| 505 | - * Returns 0 on success, negative value otherwise. | |
| 506 | - */ | |
| 507 | -static int cs_inode_getattr(const struct path *path) | |
| 508 | -{ | |
| 509 | - return cs_getattr_permission(path); | |
| 510 | -} | |
| 511 | - | |
| 512 | -#ifdef CONFIG_SECURITY_PATH | |
| 513 | - | |
| 514 | -/** | |
| 515 | - * cs_path_mknod - Check permission for mknod(). | |
| 516 | - * | |
| 517 | - * @dir: Pointer to "struct path". | |
| 518 | - * @dentry: Pointer to "struct dentry". | |
| 519 | - * @mode: Create mode. | |
| 520 | - * @dev: Device major/minor number. | |
| 521 | - * | |
| 522 | - * Returns 0 on success, negative value otherwise. | |
| 523 | - */ | |
| 524 | -static int cs_path_mknod(struct path *dir, struct dentry *dentry, | |
| 525 | - umode_t mode, unsigned int dev) | |
| 526 | -{ | |
| 527 | - struct path path = { dir->mnt, dentry }; | |
| 528 | - return cs_mknod_permission(&path, mode, dev); | |
| 529 | -} | |
| 530 | - | |
| 531 | -/** | |
| 532 | - * cs_path_mkdir - Check permission for mkdir(). | |
| 533 | - * | |
| 534 | - * @dir: Pointer to "struct path". | |
| 535 | - * @dentry: Pointer to "struct dentry". | |
| 536 | - * @mode: Create mode. | |
| 537 | - * | |
| 538 | - * Returns 0 on success, negative value otherwise. | |
| 539 | - */ | |
| 540 | -static int cs_path_mkdir(struct path *dir, struct dentry *dentry, | |
| 541 | - umode_t mode) | |
| 542 | -{ | |
| 543 | - struct path path = { dir->mnt, dentry }; | |
| 544 | - return cs_mkdir_permission(&path, mode); | |
| 545 | -} | |
| 546 | - | |
| 547 | -/** | |
| 548 | - * cs_path_rmdir - Check permission for rmdir(). | |
| 549 | - * | |
| 550 | - * @dir: Pointer to "struct path". | |
| 551 | - * @dentry: Pointer to "struct dentry". | |
| 552 | - * | |
| 553 | - * Returns 0 on success, negative value otherwise. | |
| 554 | - */ | |
| 555 | -static int cs_path_rmdir(struct path *dir, struct dentry *dentry) | |
| 556 | -{ | |
| 557 | - struct path path = { dir->mnt, dentry }; | |
| 558 | - return cs_rmdir_permission(&path); | |
| 559 | -} | |
| 560 | - | |
| 561 | -/** | |
| 562 | - * cs_path_unlink - Check permission for unlink(). | |
| 563 | - * | |
| 564 | - * @dir: Pointer to "struct path". | |
| 565 | - * @dentry: Pointer to "struct dentry". | |
| 566 | - * | |
| 567 | - * Returns 0 on success, negative value otherwise. | |
| 568 | - */ | |
| 569 | -static int cs_path_unlink(struct path *dir, struct dentry *dentry) | |
| 570 | -{ | |
| 571 | - struct path path = { dir->mnt, dentry }; | |
| 572 | - return cs_unlink_permission(&path); | |
| 573 | -} | |
| 574 | - | |
| 575 | -/** | |
| 576 | - * cs_path_symlink - Check permission for symlink(). | |
| 577 | - * | |
| 578 | - * @dir: Pointer to "struct path". | |
| 579 | - * @dentry: Pointer to "struct dentry". | |
| 580 | - * @old_name: Content of symbolic link. | |
| 581 | - * | |
| 582 | - * Returns 0 on success, negative value otherwise. | |
| 583 | - */ | |
| 584 | -static int cs_path_symlink(struct path *dir, struct dentry *dentry, | |
| 585 | - const char *old_name) | |
| 586 | -{ | |
| 587 | - struct path path = { dir->mnt, dentry }; | |
| 588 | - return cs_symlink_permission(&path, old_name); | |
| 589 | -} | |
| 590 | - | |
| 591 | -/** | |
| 592 | - * cs_path_rename - Check permission for rename(). | |
| 593 | - * | |
| 594 | - * @old_dir: Pointer to "struct path". | |
| 595 | - * @old_dentry: Pointer to "struct dentry". | |
| 596 | - * @new_dir: Pointer to "struct path". | |
| 597 | - * @new_dentry: Pointer to "struct dentry". | |
| 598 | - * | |
| 599 | - * Returns 0 on success, negative value otherwise. | |
| 600 | - */ | |
| 601 | -static int cs_path_rename(struct path *old_dir, struct dentry *old_dentry, | |
| 602 | - struct path *new_dir, struct dentry *new_dentry) | |
| 603 | -{ | |
| 604 | - struct path old = { old_dir->mnt, old_dentry }; | |
| 605 | - struct path new = { new_dir->mnt, new_dentry }; | |
| 606 | - return cs_rename_permission(&old, &new); | |
| 607 | -} | |
| 608 | - | |
| 609 | -/** | |
| 610 | - * cs_path_link - Check permission for link(). | |
| 611 | - * | |
| 612 | - * @old_dentry: Pointer to "struct dentry". | |
| 613 | - * @new_dir: Pointer to "struct path". | |
| 614 | - * @new_dentry: Pointer to "struct dentry". | |
| 615 | - * | |
| 616 | - * Returns 0 on success, negative value otherwise. | |
| 617 | - */ | |
| 618 | -static int cs_path_link(struct dentry *old_dentry, struct path *new_dir, | |
| 619 | - struct dentry *new_dentry) | |
| 620 | -{ | |
| 621 | - struct path old = { new_dir->mnt, old_dentry }; | |
| 622 | - struct path new = { new_dir->mnt, new_dentry }; | |
| 623 | - return cs_link_permission(&old, &new); | |
| 624 | -} | |
| 625 | - | |
| 626 | -#else | |
| 627 | - | |
| 628 | -/** | |
| 629 | - * cs_inode_mknod - Check permission for mknod(). | |
| 630 | - * | |
| 631 | - * @dir: Pointer to "struct inode". | |
| 632 | - * @dentry: Pointer to "struct dentry". | |
| 633 | - * @mode: Create mode. | |
| 634 | - * @dev: Device major/minor number. | |
| 635 | - * | |
| 636 | - * Returns 0 on success, negative value otherwise. | |
| 637 | - */ | |
| 638 | -static int cs_inode_mknod(struct inode *dir, struct dentry *dentry, | |
| 639 | - umode_t mode, dev_t dev) | |
| 640 | -{ | |
| 641 | - struct path path = { NULL, dentry }; | |
| 642 | - return cs_mknod_permission(&path, mode, dev); | |
| 643 | -} | |
| 644 | - | |
| 645 | -/** | |
| 646 | - * cs_inode_mkdir - Check permission for mkdir(). | |
| 647 | - * | |
| 648 | - * @dir: Pointer to "struct inode". | |
| 649 | - * @dentry: Pointer to "struct dentry". | |
| 650 | - * @mode: Create mode. | |
| 651 | - * | |
| 652 | - * Returns 0 on success, negative value otherwise. | |
| 653 | - */ | |
| 654 | -static int cs_inode_mkdir(struct inode *dir, struct dentry *dentry, | |
| 655 | - umode_t mode) | |
| 656 | -{ | |
| 657 | - struct path path = { NULL, dentry }; | |
| 658 | - return cs_mkdir_permission(&path, mode); | |
| 659 | -} | |
| 660 | - | |
| 661 | -/** | |
| 662 | - * cs_inode_rmdir - Check permission for rmdir(). | |
| 663 | - * | |
| 664 | - * @dir: Pointer to "struct inode". | |
| 665 | - * @dentry: Pointer to "struct dentry". | |
| 666 | - * | |
| 667 | - * Returns 0 on success, negative value otherwise. | |
| 668 | - */ | |
| 669 | -static int cs_inode_rmdir(struct inode *dir, struct dentry *dentry) | |
| 670 | -{ | |
| 671 | - struct path path = { NULL, dentry }; | |
| 672 | - return cs_rmdir_permission(&path); | |
| 673 | -} | |
| 674 | - | |
| 675 | -/** | |
| 676 | - * cs_inode_unlink - Check permission for unlink(). | |
| 677 | - * | |
| 678 | - * @dir: Pointer to "struct inode". | |
| 679 | - * @dentry: Pointer to "struct dentry". | |
| 680 | - * | |
| 681 | - * Returns 0 on success, negative value otherwise. | |
| 682 | - */ | |
| 683 | -static int cs_inode_unlink(struct inode *dir, struct dentry *dentry) | |
| 684 | -{ | |
| 685 | - struct path path = { NULL, dentry }; | |
| 686 | - return cs_unlink_permission(&path); | |
| 687 | -} | |
| 688 | - | |
| 689 | -/** | |
| 690 | - * cs_inode_symlink - Check permission for symlink(). | |
| 691 | - * | |
| 692 | - * @dir: Pointer to "struct inode". | |
| 693 | - * @dentry: Pointer to "struct dentry". | |
| 694 | - * @old_name: Content of symbolic link. | |
| 695 | - * | |
| 696 | - * Returns 0 on success, negative value otherwise. | |
| 697 | - */ | |
| 698 | -static int cs_inode_symlink(struct inode *dir, struct dentry *dentry, | |
| 699 | - const char *old_name) | |
| 700 | -{ | |
| 701 | - struct path path = { NULL, dentry }; | |
| 702 | - return cs_symlink_permission(&path, old_name); | |
| 703 | -} | |
| 704 | - | |
| 705 | -/** | |
| 706 | - * cs_inode_rename - Check permission for rename(). | |
| 707 | - * | |
| 708 | - * @old_dir: Pointer to "struct inode". | |
| 709 | - * @old_dentry: Pointer to "struct dentry". | |
| 710 | - * @new_dir: Pointer to "struct inode". | |
| 711 | - * @new_dentry: Pointer to "struct dentry". | |
| 712 | - * | |
| 713 | - * Returns 0 on success, negative value otherwise. | |
| 714 | - */ | |
| 715 | -static int cs_inode_rename(struct inode *old_dir, struct dentry *old_dentry, | |
| 716 | - struct inode *new_dir, struct dentry *new_dentry) | |
| 717 | -{ | |
| 718 | - struct path old = { NULL, old_dentry }; | |
| 719 | - struct path new = { NULL, new_dentry }; | |
| 720 | - return cs_rename_permission(&old, &new); | |
| 721 | -} | |
| 722 | - | |
| 723 | -/** | |
| 724 | - * cs_inode_link - Check permission for link(). | |
| 725 | - * | |
| 726 | - * @old_dentry: Pointer to "struct dentry". | |
| 727 | - * @dir: Pointer to "struct inode". | |
| 728 | - * @new_dentry: Pointer to "struct dentry". | |
| 729 | - * | |
| 730 | - * Returns 0 on success, negative value otherwise. | |
| 731 | - */ | |
| 732 | -static int cs_inode_link(struct dentry *old_dentry, struct inode *dir, | |
| 733 | - struct dentry *new_dentry) | |
| 734 | -{ | |
| 735 | - struct path old = { NULL, old_dentry }; | |
| 736 | - struct path new = { NULL, new_dentry }; | |
| 737 | - return cs_link_permission(&old, &new); | |
| 738 | -} | |
| 739 | - | |
| 740 | -/** | |
| 741 | - * cs_inode_create - Check permission for creat(). | |
| 742 | - * | |
| 743 | - * @dir: Pointer to "struct inode". | |
| 744 | - * @dentry: Pointer to "struct dentry". | |
| 745 | - * @mode: Create mode. | |
| 746 | - * | |
| 747 | - * Returns 0 on success, negative value otherwise. | |
| 748 | - */ | |
| 749 | -static int cs_inode_create(struct inode *dir, struct dentry *dentry, | |
| 750 | - umode_t mode) | |
| 751 | -{ | |
| 752 | - struct path path = { NULL, dentry }; | |
| 753 | - return cs_mknod_permission(&path, mode, 0); | |
| 754 | -} | |
| 755 | - | |
| 756 | -#endif | |
| 757 | - | |
| 758 | -#ifdef CONFIG_SECURITY_NETWORK | |
| 759 | - | |
| 760 | -#include <net/sock.h> | |
| 761 | - | |
| 762 | -/* Structure for remembering an accept()ed socket's status. */ | |
| 763 | -struct cs_socket_tag { | |
| 764 | - struct list_head list; | |
| 765 | - struct inode *inode; | |
| 766 | - int status; | |
| 767 | - struct rcu_head rcu; | |
| 768 | -}; | |
| 769 | - | |
| 770 | -/* | |
| 771 | - * List for managing accept()ed sockets. | |
| 772 | - * Since we don't need to keep an accept()ed socket into this list after | |
| 773 | - * once the permission was granted, the number of entries in this list is | |
| 774 | - * likely small. Therefore, we don't use hash tables. | |
| 775 | - */ | |
| 776 | -static LIST_HEAD(cs_accepted_socket_list); | |
| 777 | -/* Lock for protecting cs_accepted_socket_list . */ | |
| 778 | -static DEFINE_SPINLOCK(cs_accepted_socket_list_lock); | |
| 779 | - | |
| 780 | -/** | |
| 781 | - * cs_socket_rcu_free - RCU callback for releasing "struct cs_socket_tag". | |
| 782 | - * | |
| 783 | - * @rcu: Pointer to "struct rcu_head". | |
| 784 | - * | |
| 785 | - * Returns nothing. | |
| 786 | - */ | |
| 787 | -static void cs_socket_rcu_free(struct rcu_head *rcu) | |
| 788 | -{ | |
| 789 | - struct cs_socket_tag *ptr = container_of(rcu, typeof(*ptr), rcu); | |
| 790 | - kfree(ptr); | |
| 791 | -} | |
| 792 | - | |
| 793 | -/** | |
| 794 | - * cs_update_socket_tag - Update tag associated with accept()ed sockets. | |
| 795 | - * | |
| 796 | - * @inode: Pointer to "struct inode". | |
| 797 | - * @status: New status. | |
| 798 | - * | |
| 799 | - * Returns nothing. | |
| 800 | - * | |
| 801 | - * If @status == 0, memory for that socket will be released after RCU grace | |
| 802 | - * period. | |
| 803 | - */ | |
| 804 | -static void cs_update_socket_tag(struct inode *inode, int status) | |
| 805 | -{ | |
| 806 | - struct cs_socket_tag *ptr; | |
| 807 | - /* | |
| 808 | - * Protect whole section because multiple threads may call this | |
| 809 | - * function with same "sock" via cs_validate_socket(). | |
| 810 | - */ | |
| 811 | - spin_lock(&cs_accepted_socket_list_lock); | |
| 812 | - rcu_read_lock(); | |
| 813 | - list_for_each_entry_rcu(ptr, &cs_accepted_socket_list, list) { | |
| 814 | - if (ptr->inode != inode) | |
| 815 | - continue; | |
| 816 | - ptr->status = status; | |
| 817 | - if (status) | |
| 818 | - break; | |
| 819 | - list_del_rcu(&ptr->list); | |
| 820 | - call_rcu(&ptr->rcu, cs_socket_rcu_free); | |
| 821 | - break; | |
| 822 | - } | |
| 823 | - rcu_read_unlock(); | |
| 824 | - spin_unlock(&cs_accepted_socket_list_lock); | |
| 825 | -} | |
| 826 | - | |
| 827 | -/** | |
| 828 | - * cs_validate_socket - Check post accept() permission if needed. | |
| 829 | - * | |
| 830 | - * @sock: Pointer to "struct socket". | |
| 831 | - * | |
| 832 | - * Returns 0 on success, negative value otherwise. | |
| 833 | - */ | |
| 834 | -static int cs_validate_socket(struct socket *sock) | |
| 835 | -{ | |
| 836 | - struct inode *inode = SOCK_INODE(sock); | |
| 837 | - struct cs_socket_tag *ptr; | |
| 838 | - int ret = 0; | |
| 839 | - rcu_read_lock(); | |
| 840 | - list_for_each_entry_rcu(ptr, &cs_accepted_socket_list, list) { | |
| 841 | - if (ptr->inode != inode) | |
| 842 | - continue; | |
| 843 | - ret = ptr->status; | |
| 844 | - break; | |
| 845 | - } | |
| 846 | - rcu_read_unlock(); | |
| 847 | - if (ret <= 0) | |
| 848 | - /* | |
| 849 | - * This socket is not an accept()ed socket or this socket is | |
| 850 | - * an accept()ed socket and post accept() permission is done. | |
| 851 | - */ | |
| 852 | - return ret; | |
| 853 | - /* | |
| 854 | - * Check post accept() permission now. | |
| 855 | - * | |
| 856 | - * Strictly speaking, we need to pass both listen()ing socket and | |
| 857 | - * accept()ed socket to __cs_socket_post_accept_permission(). | |
| 858 | - * But since socket's family and type are same for both sockets, | |
| 859 | - * passing the accept()ed socket in place for the listen()ing socket | |
| 860 | - * will work. | |
| 861 | - */ | |
| 862 | - ret = cs_socket_post_accept_permission(sock, sock); | |
| 863 | - /* | |
| 864 | - * If permission was granted, we forget that this is an accept()ed | |
| 865 | - * socket. Otherwise, we remember that this socket needs to return | |
| 866 | - * error for subsequent socketcalls. | |
| 867 | - */ | |
| 868 | - cs_update_socket_tag(inode, ret); | |
| 869 | - return ret; | |
| 870 | -} | |
| 871 | - | |
| 872 | -/** | |
| 873 | - * cs_socket_accept - Check permission for accept(). | |
| 874 | - * | |
| 875 | - * @sock: Pointer to "struct socket". | |
| 876 | - * @newsock: Pointer to "struct socket". | |
| 877 | - * | |
| 878 | - * Returns 0 on success, negative value otherwise. | |
| 879 | - * | |
| 880 | - * This hook is used for setting up environment for doing post accept() | |
| 881 | - * permission check. If dereferencing sock->ops->something() were ordered by | |
| 882 | - * rcu_dereference(), we could replace sock->ops with "a copy of original | |
| 883 | - * sock->ops with modified sock->ops->accept()" using rcu_assign_pointer() | |
| 884 | - * in order to do post accept() permission check before returning to userspace. | |
| 885 | - * If we make the copy in security_socket_post_create(), it would be possible | |
| 886 | - * to safely replace sock->ops here, but we don't do so because we don't want | |
| 887 | - * to allocate memory for sockets which do not call sock->ops->accept(). | |
| 888 | - * Therefore, we do post accept() permission check upon next socket syscalls | |
| 889 | - * rather than between sock->ops->accept() and returning to userspace. | |
| 890 | - * This means that if a socket was close()d before calling some socket | |
| 891 | - * syscalls, post accept() permission check will not be done. | |
| 892 | - */ | |
| 893 | -static int cs_socket_accept(struct socket *sock, struct socket *newsock) | |
| 894 | -{ | |
| 895 | - struct cs_socket_tag *ptr; | |
| 896 | - const int rc = cs_validate_socket(sock); | |
| 897 | - if (rc < 0) | |
| 898 | - return rc; | |
| 899 | - ptr = kzalloc(sizeof(*ptr), GFP_KERNEL); | |
| 900 | - if (!ptr) | |
| 901 | - return -ENOMEM; | |
| 902 | - /* | |
| 903 | - * Subsequent LSM hooks will receive "newsock". Therefore, I mark | |
| 904 | - * "newsock" as "an accept()ed socket but post accept() permission | |
| 905 | - * check is not done yet" by allocating memory using inode of the | |
| 906 | - * "newsock" as a search key. | |
| 907 | - */ | |
| 908 | - ptr->inode = SOCK_INODE(newsock); | |
| 909 | - ptr->status = 1; /* Check post accept() permission later. */ | |
| 910 | - spin_lock(&cs_accepted_socket_list_lock); | |
| 911 | - list_add_tail_rcu(&ptr->list, &cs_accepted_socket_list); | |
| 912 | - spin_unlock(&cs_accepted_socket_list_lock); | |
| 913 | - return 0; | |
| 914 | -} | |
| 915 | - | |
| 916 | -/** | |
| 917 | - * cs_socket_listen - Check permission for listen(). | |
| 918 | - * | |
| 919 | - * @sock: Pointer to "struct socket". | |
| 920 | - * @backlog: Backlog parameter. | |
| 921 | - * | |
| 922 | - * Returns 0 on success, negative value otherwise. | |
| 923 | - */ | |
| 924 | -static int cs_socket_listen(struct socket *sock, int backlog) | |
| 925 | -{ | |
| 926 | - const int rc = cs_validate_socket(sock); | |
| 927 | - if (rc < 0) | |
| 928 | - return rc; | |
| 929 | - return cs_socket_listen_permission(sock); | |
| 930 | -} | |
| 931 | - | |
| 932 | -/** | |
| 933 | - * cs_socket_connect - Check permission for connect(). | |
| 934 | - * | |
| 935 | - * @sock: Pointer to "struct socket". | |
| 936 | - * @addr: Pointer to "struct sockaddr". | |
| 937 | - * @addr_len: Size of @addr. | |
| 938 | - * | |
| 939 | - * Returns 0 on success, negative value otherwise. | |
| 940 | - */ | |
| 941 | -static int cs_socket_connect(struct socket *sock, struct sockaddr *addr, | |
| 942 | - int addr_len) | |
| 943 | -{ | |
| 944 | - const int rc = cs_validate_socket(sock); | |
| 945 | - if (rc < 0) | |
| 946 | - return rc; | |
| 947 | - return cs_socket_connect_permission(sock, addr, addr_len); | |
| 948 | -} | |
| 949 | - | |
| 950 | -/** | |
| 951 | - * cs_socket_bind - Check permission for bind(). | |
| 952 | - * | |
| 953 | - * @sock: Pointer to "struct socket". | |
| 954 | - * @addr: Pointer to "struct sockaddr". | |
| 955 | - * @addr_len: Size of @addr. | |
| 956 | - * | |
| 957 | - * Returns 0 on success, negative value otherwise. | |
| 958 | - */ | |
| 959 | -static int cs_socket_bind(struct socket *sock, struct sockaddr *addr, | |
| 960 | - int addr_len) | |
| 961 | -{ | |
| 962 | - const int rc = cs_validate_socket(sock); | |
| 963 | - if (rc < 0) | |
| 964 | - return rc; | |
| 965 | - return cs_socket_bind_permission(sock, addr, addr_len); | |
| 966 | -} | |
| 967 | - | |
| 968 | -/** | |
| 969 | - * cs_socket_sendmsg - Check permission for sendmsg(). | |
| 970 | - * | |
| 971 | - * @sock: Pointer to "struct socket". | |
| 972 | - * @msg: Pointer to "struct msghdr". | |
| 973 | - * @size: Size of message. | |
| 974 | - * | |
| 975 | - * Returns 0 on success, negative value otherwise. | |
| 976 | - */ | |
| 977 | -static int cs_socket_sendmsg(struct socket *sock, struct msghdr *msg, | |
| 978 | - int size) | |
| 979 | -{ | |
| 980 | - const int rc = cs_validate_socket(sock); | |
| 981 | - if (rc < 0) | |
| 982 | - return rc; | |
| 983 | - return cs_socket_sendmsg_permission(sock, msg, size); | |
| 984 | -} | |
| 985 | - | |
| 986 | -/** | |
| 987 | - * cs_socket_recvmsg - Check permission for recvmsg(). | |
| 988 | - * | |
| 989 | - * @sock: Pointer to "struct socket". | |
| 990 | - * @msg: Pointer to "struct msghdr". | |
| 991 | - * @size: Size of message. | |
| 992 | - * @flags: Flags. | |
| 993 | - * | |
| 994 | - * Returns 0 on success, negative value otherwise. | |
| 995 | - */ | |
| 996 | -static int cs_socket_recvmsg(struct socket *sock, struct msghdr *msg, | |
| 997 | - int size, int flags) | |
| 998 | -{ | |
| 999 | - return cs_validate_socket(sock); | |
| 1000 | -} | |
| 1001 | - | |
| 1002 | -/** | |
| 1003 | - * cs_socket_getsockname - Check permission for getsockname(). | |
| 1004 | - * | |
| 1005 | - * @sock: Pointer to "struct socket". | |
| 1006 | - * | |
| 1007 | - * Returns 0 on success, negative value otherwise. | |
| 1008 | - */ | |
| 1009 | -static int cs_socket_getsockname(struct socket *sock) | |
| 1010 | -{ | |
| 1011 | - return cs_validate_socket(sock); | |
| 1012 | -} | |
| 1013 | - | |
| 1014 | -/** | |
| 1015 | - * cs_socket_getpeername - Check permission for getpeername(). | |
| 1016 | - * | |
| 1017 | - * @sock: Pointer to "struct socket". | |
| 1018 | - * | |
| 1019 | - * Returns 0 on success, negative value otherwise. | |
| 1020 | - */ | |
| 1021 | -static int cs_socket_getpeername(struct socket *sock) | |
| 1022 | -{ | |
| 1023 | - return cs_validate_socket(sock); | |
| 1024 | -} | |
| 1025 | - | |
| 1026 | -/** | |
| 1027 | - * cs_socket_getsockopt - Check permission for getsockopt(). | |
| 1028 | - * | |
| 1029 | - * @sock: Pointer to "struct socket". | |
| 1030 | - * @level: Level. | |
| 1031 | - * @optname: Option's name, | |
| 1032 | - * | |
| 1033 | - * Returns 0 on success, negative value otherwise. | |
| 1034 | - */ | |
| 1035 | -static int cs_socket_getsockopt(struct socket *sock, int level, int optname) | |
| 1036 | -{ | |
| 1037 | - return cs_validate_socket(sock); | |
| 1038 | -} | |
| 1039 | - | |
| 1040 | -/** | |
| 1041 | - * cs_socket_setsockopt - Check permission for setsockopt(). | |
| 1042 | - * | |
| 1043 | - * @sock: Pointer to "struct socket". | |
| 1044 | - * @level: Level. | |
| 1045 | - * @optname: Option's name, | |
| 1046 | - * | |
| 1047 | - * Returns 0 on success, negative value otherwise. | |
| 1048 | - */ | |
| 1049 | -static int cs_socket_setsockopt(struct socket *sock, int level, int optname) | |
| 1050 | -{ | |
| 1051 | - return cs_validate_socket(sock); | |
| 1052 | -} | |
| 1053 | - | |
| 1054 | -/** | |
| 1055 | - * cs_socket_shutdown - Check permission for shutdown(). | |
| 1056 | - * | |
| 1057 | - * @sock: Pointer to "struct socket". | |
| 1058 | - * @how: Shutdown mode. | |
| 1059 | - * | |
| 1060 | - * Returns 0 on success, negative value otherwise. | |
| 1061 | - */ | |
| 1062 | -static int cs_socket_shutdown(struct socket *sock, int how) | |
| 1063 | -{ | |
| 1064 | - return cs_validate_socket(sock); | |
| 1065 | -} | |
| 1066 | - | |
| 1067 | -#define SOCKFS_MAGIC 0x534F434B | |
| 1068 | - | |
| 1069 | -/** | |
| 1070 | - * cs_inode_free_security - Release memory associated with an inode. | |
| 1071 | - * | |
| 1072 | - * @inode: Pointer to "struct inode". | |
| 1073 | - * | |
| 1074 | - * Returns nothing. | |
| 1075 | - * | |
| 1076 | - * We use this hook for releasing memory associated with an accept()ed socket. | |
| 1077 | - */ | |
| 1078 | -static void cs_inode_free_security(struct inode *inode) | |
| 1079 | -{ | |
| 1080 | - if (inode->i_sb && inode->i_sb->s_magic == SOCKFS_MAGIC) | |
| 1081 | - cs_update_socket_tag(inode, 0); | |
| 1082 | -} | |
| 1083 | - | |
| 1084 | -#endif | |
| 1085 | - | |
| 1086 | -/** | |
| 1087 | - * cs_sb_pivotroot - Check permission for pivot_root(). | |
| 1088 | - * | |
| 1089 | - * @old_path: Pointer to "struct path". | |
| 1090 | - * @new_path: Pointer to "struct path". | |
| 1091 | - * | |
| 1092 | - * Returns 0 on success, negative value otherwise. | |
| 1093 | - */ | |
| 1094 | -static int cs_sb_pivotroot(struct path *old_path, struct path *new_path) | |
| 1095 | -{ | |
| 1096 | - return cs_pivot_root_permission(old_path, new_path); | |
| 1097 | -} | |
| 1098 | - | |
| 1099 | -/** | |
| 1100 | - * cs_sb_mount - Check permission for mount(). | |
| 1101 | - * | |
| 1102 | - * @dev_name: Name of device file. | |
| 1103 | - * @path: Pointer to "struct path". | |
| 1104 | - * @type: Name of filesystem type. Maybe NULL. | |
| 1105 | - * @flags: Mount options. | |
| 1106 | - * @data_page: Optional data. Maybe NULL. | |
| 1107 | - * | |
| 1108 | - * Returns 0 on success, negative value otherwise. | |
| 1109 | - */ | |
| 1110 | -static int cs_sb_mount(const char *dev_name, struct path *path, | |
| 1111 | - const char *type, unsigned long flags, void *data_page) | |
| 1112 | -{ | |
| 1113 | - return cs_mount_permission(dev_name, path, type, flags, data_page); | |
| 1114 | -} | |
| 1115 | - | |
| 1116 | -/** | |
| 1117 | - * cs_sb_umount - Check permission for umount(). | |
| 1118 | - * | |
| 1119 | - * @mnt: Pointer to "struct vfsmount". | |
| 1120 | - * @flags: Unmount flags. | |
| 1121 | - * | |
| 1122 | - * Returns 0 on success, negative value otherwise. | |
| 1123 | - */ | |
| 1124 | -static int cs_sb_umount(struct vfsmount *mnt, int flags) | |
| 1125 | -{ | |
| 1126 | - struct path path = { mnt, mnt->mnt_root }; | |
| 1127 | - return cs_umount_permission(&path, flags); | |
| 1128 | -} | |
| 1129 | - | |
| 1130 | -/** | |
| 1131 | - * cs_file_fcntl - Check permission for fcntl(). | |
| 1132 | - * | |
| 1133 | - * @file: Pointer to "struct file". | |
| 1134 | - * @cmd: Command number. | |
| 1135 | - * @arg: Value for @cmd. | |
| 1136 | - * | |
| 1137 | - * Returns 0 on success, negative value otherwise. | |
| 1138 | - */ | |
| 1139 | -static int cs_file_fcntl(struct file *file, unsigned int cmd, | |
| 1140 | - unsigned long arg) | |
| 1141 | -{ | |
| 1142 | - return cs_fcntl_permission(file, cmd, arg); | |
| 1143 | -} | |
| 1144 | - | |
| 1145 | -/** | |
| 1146 | - * cs_file_ioctl - Check permission for ioctl(). | |
| 1147 | - * | |
| 1148 | - * @filp: Pointer to "struct file". | |
| 1149 | - * @cmd: Command number. | |
| 1150 | - * @arg: Value for @cmd. | |
| 1151 | - * | |
| 1152 | - * Returns 0 on success, negative value otherwise. | |
| 1153 | - */ | |
| 1154 | -static int cs_file_ioctl(struct file *filp, unsigned int cmd, | |
| 1155 | - unsigned long arg) | |
| 1156 | -{ | |
| 1157 | - return cs_ioctl_permission(filp, cmd, arg); | |
| 1158 | -} | |
| 1159 | - | |
| 1160 | -#define MY_HOOK_INIT(HEAD, HOOK) \ | |
| 1161 | - { .head = &probe_dummy_security_hook_heads.HEAD, \ | |
| 1162 | - .hook = { .HEAD = HOOK } } | |
| 1163 | - | |
| 1164 | -static struct security_hook_list caitsith_hooks[] = { | |
| 1165 | - /* Security context allocator. */ | |
| 1166 | - MY_HOOK_INIT(cred_free, cs_cred_free), | |
| 1167 | - MY_HOOK_INIT(cred_prepare, cs_cred_prepare), | |
| 1168 | - MY_HOOK_INIT(cred_alloc_blank, cs_cred_alloc_blank), | |
| 1169 | - MY_HOOK_INIT(cred_transfer, cs_cred_transfer), | |
| 1170 | - MY_HOOK_INIT(task_create, cs_task_create), | |
| 1171 | - /* Security context updater for successful execve(). */ | |
| 1172 | - MY_HOOK_INIT(bprm_check_security, cs_bprm_check_security), | |
| 1173 | - MY_HOOK_INIT(bprm_committing_creds, cs_bprm_committing_creds), | |
| 1174 | - /* Various permission checker. */ | |
| 1175 | - MY_HOOK_INIT(file_open, cs_file_open), | |
| 1176 | - MY_HOOK_INIT(file_fcntl, cs_file_fcntl), | |
| 1177 | - MY_HOOK_INIT(file_ioctl, cs_file_ioctl), | |
| 1178 | - MY_HOOK_INIT(sb_pivotroot, cs_sb_pivotroot), | |
| 1179 | - MY_HOOK_INIT(sb_mount, cs_sb_mount), | |
| 1180 | - MY_HOOK_INIT(sb_umount, cs_sb_umount), | |
| 1181 | -#ifdef CONFIG_SECURITY_PATH | |
| 1182 | - MY_HOOK_INIT(path_mknod, cs_path_mknod), | |
| 1183 | - MY_HOOK_INIT(path_mkdir, cs_path_mkdir), | |
| 1184 | - MY_HOOK_INIT(path_rmdir, cs_path_rmdir), | |
| 1185 | - MY_HOOK_INIT(path_unlink, cs_path_unlink), | |
| 1186 | - MY_HOOK_INIT(path_symlink, cs_path_symlink), | |
| 1187 | - MY_HOOK_INIT(path_rename, cs_path_rename), | |
| 1188 | - MY_HOOK_INIT(path_link, cs_path_link), | |
| 1189 | - MY_HOOK_INIT(path_truncate, cs_path_truncate), | |
| 1190 | - MY_HOOK_INIT(path_chmod, cs_path_chmod), | |
| 1191 | - MY_HOOK_INIT(path_chown, cs_path_chown), | |
| 1192 | - MY_HOOK_INIT(path_chroot, cs_path_chroot), | |
| 1193 | -#else | |
| 1194 | - MY_HOOK_INIT(inode_mknod, cs_inode_mknod), | |
| 1195 | - MY_HOOK_INIT(inode_mkdir, cs_inode_mkdir), | |
| 1196 | - MY_HOOK_INIT(inode_rmdir, cs_inode_rmdir), | |
| 1197 | - MY_HOOK_INIT(inode_unlink, cs_inode_unlink), | |
| 1198 | - MY_HOOK_INIT(inode_symlink, cs_inode_symlink), | |
| 1199 | - MY_HOOK_INIT(inode_rename, cs_inode_rename), | |
| 1200 | - MY_HOOK_INIT(inode_link, cs_inode_link), | |
| 1201 | - MY_HOOK_INIT(inode_create, cs_inode_create), | |
| 1202 | - MY_HOOK_INIT(inode_setattr, cs_inode_setattr), | |
| 1203 | -#endif | |
| 1204 | - MY_HOOK_INIT(inode_getattr, cs_inode_getattr), | |
| 1205 | -#ifdef CONFIG_SECURITY_NETWORK | |
| 1206 | - MY_HOOK_INIT(socket_bind, cs_socket_bind), | |
| 1207 | - MY_HOOK_INIT(socket_connect, cs_socket_connect), | |
| 1208 | - MY_HOOK_INIT(socket_listen, cs_socket_listen), | |
| 1209 | - MY_HOOK_INIT(socket_sendmsg, cs_socket_sendmsg), | |
| 1210 | - MY_HOOK_INIT(socket_recvmsg, cs_socket_recvmsg), | |
| 1211 | - MY_HOOK_INIT(socket_getsockname, cs_socket_getsockname), | |
| 1212 | - MY_HOOK_INIT(socket_getpeername, cs_socket_getpeername), | |
| 1213 | - MY_HOOK_INIT(socket_getsockopt, cs_socket_getsockopt), | |
| 1214 | - MY_HOOK_INIT(socket_setsockopt, cs_socket_setsockopt), | |
| 1215 | - MY_HOOK_INIT(socket_shutdown, cs_socket_shutdown), | |
| 1216 | - MY_HOOK_INIT(socket_accept, cs_socket_accept), | |
| 1217 | - MY_HOOK_INIT(inode_free_security, cs_inode_free_security), | |
| 1218 | -#endif | |
| 1219 | -}; | |
| 1220 | - | |
| 1221 | -static inline void add_hook(struct security_hook_list *hook) | |
| 1222 | -{ | |
| 1223 | - list_add_tail_rcu(&hook->list, hook->head); | |
| 1224 | -} | |
| 1225 | - | |
| 1226 | -static void __init swap_hook(struct security_hook_list *hook, | |
| 1227 | - union security_list_options *original) | |
| 1228 | -{ | |
| 1229 | - struct list_head *list = hook->head; | |
| 1230 | - if (list_empty(list)) { | |
| 1231 | - add_hook(hook); | |
| 1232 | - } else { | |
| 1233 | - struct security_hook_list *shp = | |
| 1234 | - list_last_entry(list, struct security_hook_list, list); | |
| 1235 | - *original = shp->hook; | |
| 1236 | - smp_wmb(); | |
| 1237 | - shp->hook = hook->hook; | |
| 1238 | - } | |
| 1239 | -} | |
| 1240 | - | |
| 1241 | -/** | |
| 1242 | - * cs_init - Initialize this module. | |
| 1243 | - * | |
| 1244 | - * Returns 0 on success, negative value otherwise. | |
| 1245 | - */ | |
| 1246 | -static int __init cs_init(void) | |
| 1247 | -{ | |
| 1248 | - int idx; | |
| 1249 | - struct security_hook_heads *hooks = probe_security_hook_heads(); | |
| 1250 | - if (!hooks) | |
| 1251 | - goto out; | |
| 1252 | - for (idx = 0; idx < ARRAY_SIZE(caitsith_hooks); idx++) | |
| 1253 | - caitsith_hooks[idx].head = ((void *) hooks) | |
| 1254 | - + ((unsigned long) caitsith_hooks[idx].head) | |
| 1255 | - - ((unsigned long) &probe_dummy_security_hook_heads); | |
| 1256 | - caitsith_exports.find_task_by_vpid = probe_find_task_by_vpid(); | |
| 1257 | - if (!caitsith_exports.find_task_by_vpid) | |
| 1258 | - goto out; | |
| 1259 | - caitsith_exports.find_task_by_pid_ns = probe_find_task_by_pid_ns(); | |
| 1260 | - if (!caitsith_exports.find_task_by_pid_ns) | |
| 1261 | - goto out; | |
| 1262 | - caitsith_exports.d_absolute_path = probe_d_absolute_path(); | |
| 1263 | - if (!caitsith_exports.d_absolute_path) | |
| 1264 | - goto out; | |
| 1265 | - for (idx = 0; idx < CS_MAX_TASK_SECURITY_HASH; idx++) { | |
| 1266 | - INIT_LIST_HEAD(&cs_cred_security_list[idx]); | |
| 1267 | - INIT_LIST_HEAD(&cs_task_security_list[idx]); | |
| 1268 | - } | |
| 1269 | - cs_init_module(); | |
| 1270 | - swap_hook(&caitsith_hooks[0], &original_cred_free); | |
| 1271 | - swap_hook(&caitsith_hooks[1], &original_cred_prepare); | |
| 1272 | - swap_hook(&caitsith_hooks[2], &original_cred_alloc_blank); | |
| 1273 | - for (idx = 3; idx < ARRAY_SIZE(caitsith_hooks); idx++) | |
| 1274 | - add_hook(&caitsith_hooks[idx]); | |
| 1275 | - return 0; | |
| 1276 | -out: | |
| 1277 | - return -EINVAL; | |
| 1278 | -} | |
| 1279 | - | |
| 1280 | -module_init(cs_init); | |
| 1281 | -MODULE_LICENSE("GPL"); | |
| 1282 | - | |
| 1283 | -/** | |
| 1284 | - * cs_used_by_cred - Check whether the given domain is in use or not. | |
| 1285 | - * | |
| 1286 | - * @domain: Pointer to "struct cs_domain_info". | |
| 1287 | - * | |
| 1288 | - * Returns true if @domain is in use, false otherwise. | |
| 1289 | - * | |
| 1290 | - * Caller holds rcu_read_lock(). | |
| 1291 | - */ | |
| 1292 | -bool cs_used_by_cred(const struct cs_domain_info *domain) | |
| 1293 | -{ | |
| 1294 | - int idx; | |
| 1295 | - struct cs_security *ptr; | |
| 1296 | - for (idx = 0; idx < CS_MAX_TASK_SECURITY_HASH; idx++) { | |
| 1297 | - struct list_head *list = &cs_cred_security_list[idx]; | |
| 1298 | - list_for_each_entry_rcu(ptr, list, list) { | |
| 1299 | - struct cs_request_info *r = ptr->r; | |
| 1300 | - if (ptr->cs_domain_info == domain || | |
| 1301 | - (r && r->previous_domain == domain)) { | |
| 1302 | - return true; | |
| 1303 | - } | |
| 1304 | - } | |
| 1305 | - } | |
| 1306 | - return false; | |
| 1307 | -} | |
| 1308 | - | |
| 1309 | -/** | |
| 1310 | - * cs_add_task_security - Add "struct cs_security" to list. | |
| 1311 | - * | |
| 1312 | - * @ptr: Pointer to "struct cs_security". | |
| 1313 | - * @list: Pointer to "struct list_head". | |
| 1314 | - * | |
| 1315 | - * Returns nothing. | |
| 1316 | - */ | |
| 1317 | -static void cs_add_task_security(struct cs_security *ptr, | |
| 1318 | - struct list_head *list) | |
| 1319 | -{ | |
| 1320 | - unsigned long flags; | |
| 1321 | - spin_lock_irqsave(&cs_task_security_list_lock, flags); | |
| 1322 | - list_add_rcu(&ptr->list, list); | |
| 1323 | - spin_unlock_irqrestore(&cs_task_security_list_lock, flags); | |
| 1324 | -} | |
| 1325 | - | |
| 1326 | -/** | |
| 1327 | - * cs_find_task_security - Find "struct cs_security" for given task. | |
| 1328 | - * | |
| 1329 | - * @task: Pointer to "struct task_struct". | |
| 1330 | - * | |
| 1331 | - * Returns pointer to "struct cs_security" on success, &cs_oom_security on | |
| 1332 | - * out of memory, &cs_default_security otherwise. | |
| 1333 | - * | |
| 1334 | - * If @task is current thread and "struct cs_security" for current thread was | |
| 1335 | - * not found, I try to allocate it. But if allocation failed, current thread | |
| 1336 | - * will be killed by SIGKILL. Note that if current->pid == 1, sending SIGKILL | |
| 1337 | - * won't work. | |
| 1338 | - */ | |
| 1339 | -struct cs_security *cs_find_task_security(const struct task_struct *task) | |
| 1340 | -{ | |
| 1341 | - struct cs_security *ptr; | |
| 1342 | - struct list_head *list = &cs_task_security_list | |
| 1343 | - [hash_ptr((void *) task, CS_TASK_SECURITY_HASH_BITS)]; | |
| 1344 | - /* Make sure INIT_LIST_HEAD() in cs_mm_init() takes effect. */ | |
| 1345 | - while (!list->next); | |
| 1346 | - rcu_read_lock(); | |
| 1347 | - list_for_each_entry_rcu(ptr, list, list) { | |
| 1348 | - if (ptr->pid != task->pids[PIDTYPE_PID].pid) | |
| 1349 | - continue; | |
| 1350 | - rcu_read_unlock(); | |
| 1351 | - /* | |
| 1352 | - * Current thread needs to transit from old domain to new | |
| 1353 | - * domain before do_execve() succeeds in order to check | |
| 1354 | - * permission for interpreters and environment variables using | |
| 1355 | - * new domain's ACL rules. The domain transition has to be | |
| 1356 | - * visible from other CPU in order to allow interactive | |
| 1357 | - * enforcing mode. Also, the domain transition has to be | |
| 1358 | - * reverted if do_execve() failed. However, an LSM hook for | |
| 1359 | - * reverting domain transition is missing. | |
| 1360 | - * | |
| 1361 | - * security_prepare_creds() is called from prepare_creds() from | |
| 1362 | - * prepare_bprm_creds() from do_execve() before setting | |
| 1363 | - * current->in_execve flag, and current->in_execve flag is | |
| 1364 | - * cleared by the time next do_execve() request starts. | |
| 1365 | - * This means that we can emulate the missing LSM hook for | |
| 1366 | - * reverting domain transition, by calling this function from | |
| 1367 | - * security_prepare_creds(). | |
| 1368 | - * | |
| 1369 | - * If current->in_execve is not set but ptr->cs_flags has | |
| 1370 | - * CS_TASK_IS_IN_EXECVE set, it indicates that do_execve() | |
| 1371 | - * has failed and reverting domain transition is needed. | |
| 1372 | - */ | |
| 1373 | - if (task == current && | |
| 1374 | - (ptr->cs_flags & CS_TASK_IS_IN_EXECVE) && | |
| 1375 | - !current->in_execve) { | |
| 1376 | - cs_debug_trace("4"); | |
| 1377 | - cs_clear_execve(-1, ptr); | |
| 1378 | - } | |
| 1379 | - return ptr; | |
| 1380 | - } | |
| 1381 | - rcu_read_unlock(); | |
| 1382 | - if (task != current) { | |
| 1383 | - /* | |
| 1384 | - * If a thread does nothing after fork(), caller will reach | |
| 1385 | - * here because "struct cs_security" for that thread is not | |
| 1386 | - * yet allocated. But that thread is keeping a snapshot of | |
| 1387 | - * "struct cs_security" taken as of cs_task_create() | |
| 1388 | - * associated with that thread's "struct cred". | |
| 1389 | - * | |
| 1390 | - * Since that snapshot will be used as initial data when that | |
| 1391 | - * thread allocates "struct cs_security" for that thread, we | |
| 1392 | - * can return that snapshot rather than &cs_default_security. | |
| 1393 | - * | |
| 1394 | - * Since this function is called by only cs_select_one() and | |
| 1395 | - * cs_read_pid() (via cs_task_domain() and cs_task_flags()), | |
| 1396 | - * it is guaranteed that caller has called rcu_read_lock() | |
| 1397 | - * (via cs_tasklist_lock()) before finding this thread and | |
| 1398 | - * this thread is valid. Therefore, we can do __task_cred(task) | |
| 1399 | - * like get_robust_list() does. | |
| 1400 | - */ | |
| 1401 | - return cs_find_cred_security(__task_cred(task)); | |
| 1402 | - } | |
| 1403 | - /* Use GFP_ATOMIC because caller may have called rcu_read_lock(). */ | |
| 1404 | - ptr = kzalloc(sizeof(*ptr), GFP_ATOMIC); | |
| 1405 | - if (!ptr) { | |
| 1406 | - printk(KERN_WARNING "Unable to allocate memory for pid=%u\n", | |
| 1407 | - task->pid); | |
| 1408 | - send_sig(SIGKILL, current, 0); | |
| 1409 | - return &cs_oom_security; | |
| 1410 | - } | |
| 1411 | - *ptr = *cs_find_cred_security(task->cred); | |
| 1412 | - /* We can shortcut because task == current. */ | |
| 1413 | - ptr->pid = get_pid(((struct task_struct *) task)-> | |
| 1414 | - pids[PIDTYPE_PID].pid); | |
| 1415 | - ptr->cred = NULL; | |
| 1416 | - cs_add_task_security(ptr, list); | |
| 1417 | - return ptr; | |
| 1418 | -} | |
| 1419 | - | |
| 1420 | -/** | |
| 1421 | - * cs_copy_cred_security - Allocate memory for new credentials. | |
| 1422 | - * | |
| 1423 | - * @new: Pointer to "struct cred". | |
| 1424 | - * @old: Pointer to "struct cred". | |
| 1425 | - * @gfp: Memory allocation flags. | |
| 1426 | - * | |
| 1427 | - * Returns 0 on success, negative value otherwise. | |
| 1428 | - */ | |
| 1429 | -static int cs_copy_cred_security(const struct cred *new, | |
| 1430 | - const struct cred *old, gfp_t gfp) | |
| 1431 | -{ | |
| 1432 | - struct cs_security *old_security = cs_find_cred_security(old); | |
| 1433 | - struct cs_security *new_security = | |
| 1434 | - kzalloc(sizeof(*new_security), gfp); | |
| 1435 | - if (!new_security) | |
| 1436 | - return -ENOMEM; | |
| 1437 | - *new_security = *old_security; | |
| 1438 | - new_security->cred = new; | |
| 1439 | - cs_add_cred_security(new_security); | |
| 1440 | - return 0; | |
| 1441 | -} | |
| 1442 | - | |
| 1443 | -/** | |
| 1444 | - * cs_find_cred_security - Find "struct cs_security" for given credential. | |
| 1445 | - * | |
| 1446 | - * @cred: Pointer to "struct cred". | |
| 1447 | - * | |
| 1448 | - * Returns pointer to "struct cs_security" on success, &cs_default_security | |
| 1449 | - * otherwise. | |
| 1450 | - */ | |
| 1451 | -static struct cs_security *cs_find_cred_security(const struct cred *cred) | |
| 1452 | -{ | |
| 1453 | - struct cs_security *ptr; | |
| 1454 | - struct list_head *list = &cs_cred_security_list | |
| 1455 | - [hash_ptr((void *) cred, CS_TASK_SECURITY_HASH_BITS)]; | |
| 1456 | - rcu_read_lock(); | |
| 1457 | - list_for_each_entry_rcu(ptr, list, list) { | |
| 1458 | - if (ptr->cred != cred) | |
| 1459 | - continue; | |
| 1460 | - rcu_read_unlock(); | |
| 1461 | - return ptr; | |
| 1462 | - } | |
| 1463 | - rcu_read_unlock(); | |
| 1464 | - return &cs_default_security; | |
| 1465 | -} | |
| 1466 | - | |
| 1467 | -/** | |
| 1468 | - * cs_task_security_gc - Do garbage collection for "struct task_struct". | |
| 1469 | - * | |
| 1470 | - * Returns nothing. | |
| 1471 | - * | |
| 1472 | - * Since security_task_free() is missing, I can't release memory associated | |
| 1473 | - * with "struct task_struct" when a task dies. Therefore, I hold a reference on | |
| 1474 | - * "struct pid" and runs garbage collection when associated | |
| 1475 | - * "struct task_struct" has gone. | |
| 1476 | - */ | |
| 1477 | -static void cs_task_security_gc(void) | |
| 1478 | -{ | |
| 1479 | - static DEFINE_SPINLOCK(lock); | |
| 1480 | - static atomic_t gc_counter = ATOMIC_INIT(0); | |
| 1481 | - unsigned int idx; | |
| 1482 | - /* | |
| 1483 | - * If some process is doing execve(), try to garbage collection now. | |
| 1484 | - * We should kfree() memory associated with "struct cs_security"->r | |
| 1485 | - * as soon as execve() has completed in order to compensate for lack of | |
| 1486 | - * security_bprm_free() and security_task_free() hooks. | |
| 1487 | - * | |
| 1488 | - * Otherwise, reduce frequency for performance reason. | |
| 1489 | - */ | |
| 1490 | - if (!atomic_read(&cs_in_execve_tasks) && | |
| 1491 | - atomic_inc_return(&gc_counter) < 1024) | |
| 1492 | - return; | |
| 1493 | - if (!spin_trylock(&lock)) | |
| 1494 | - return; | |
| 1495 | - atomic_set(&gc_counter, 0); | |
| 1496 | - rcu_read_lock(); | |
| 1497 | - for (idx = 0; idx < CS_MAX_TASK_SECURITY_HASH; idx++) { | |
| 1498 | - struct cs_security *ptr; | |
| 1499 | - struct list_head *list = &cs_task_security_list[idx]; | |
| 1500 | - list_for_each_entry_rcu(ptr, list, list) { | |
| 1501 | - if (pid_task(ptr->pid, PIDTYPE_PID)) | |
| 1502 | - continue; | |
| 1503 | - cs_del_security(ptr); | |
| 1504 | - } | |
| 1505 | - } | |
| 1506 | - rcu_read_unlock(); | |
| 1507 | - spin_unlock(&lock); | |
| 1508 | -} |
| @@ -437,7 +437,7 @@ | ||
| 437 | 437 | static int cs_inode_setattr(struct dentry *dentry, struct iattr *attr) |
| 438 | 438 | { |
| 439 | 439 | int rc = 0; |
| 440 | - struct path path = { NULL, dentry }; | |
| 440 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 441 | 441 | if (attr->ia_valid & ATTR_UID) |
| 442 | 442 | rc = cs_chown_permission(&path, attr->ia_uid, -1); |
| 443 | 443 | if (!rc && (attr->ia_valid & ATTR_GID)) |
| @@ -462,7 +462,7 @@ | ||
| 462 | 462 | */ |
| 463 | 463 | static int cs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) |
| 464 | 464 | { |
| 465 | - struct path path = { mnt, dentry }; | |
| 465 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 466 | 466 | int rc = cs_getattr_permission(&path); |
| 467 | 467 | if (rc) |
| 468 | 468 | return rc; |
| @@ -483,7 +483,7 @@ | ||
| 483 | 483 | static int cs_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, |
| 484 | 484 | dev_t dev) |
| 485 | 485 | { |
| 486 | - struct path path = { NULL, dentry }; | |
| 486 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 487 | 487 | int rc = cs_mknod_permission(&path, mode, dev); |
| 488 | 488 | if (rc) |
| 489 | 489 | return rc; |
| @@ -502,7 +502,7 @@ | ||
| 502 | 502 | */ |
| 503 | 503 | static int cs_inode_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
| 504 | 504 | { |
| 505 | - struct path path = { NULL, dentry }; | |
| 505 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 506 | 506 | int rc = cs_mkdir_permission(&path, mode); |
| 507 | 507 | if (rc) |
| 508 | 508 | return rc; |
| @@ -520,7 +520,7 @@ | ||
| 520 | 520 | */ |
| 521 | 521 | static int cs_inode_rmdir(struct inode *dir, struct dentry *dentry) |
| 522 | 522 | { |
| 523 | - struct path path = { NULL, dentry }; | |
| 523 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 524 | 524 | int rc = cs_rmdir_permission(&path); |
| 525 | 525 | if (rc) |
| 526 | 526 | return rc; |
| @@ -538,7 +538,7 @@ | ||
| 538 | 538 | */ |
| 539 | 539 | static int cs_inode_unlink(struct inode *dir, struct dentry *dentry) |
| 540 | 540 | { |
| 541 | - struct path path = { NULL, dentry }; | |
| 541 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 542 | 542 | int rc = cs_unlink_permission(&path); |
| 543 | 543 | if (rc) |
| 544 | 544 | return rc; |
| @@ -558,7 +558,7 @@ | ||
| 558 | 558 | static int cs_inode_symlink(struct inode *dir, struct dentry *dentry, |
| 559 | 559 | const char *old_name) |
| 560 | 560 | { |
| 561 | - struct path path = { NULL, dentry }; | |
| 561 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 562 | 562 | int rc = cs_symlink_permission(&path, old_name); |
| 563 | 563 | if (rc) |
| 564 | 564 | return rc; |
| @@ -622,7 +622,7 @@ | ||
| 622 | 622 | static int cs_inode_create(struct inode *dir, struct dentry *dentry, |
| 623 | 623 | int mode) |
| 624 | 624 | { |
| 625 | - struct path path = { NULL, dentry }; | |
| 625 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 626 | 626 | int rc = cs_mknod_permission(&path, mode, 0); |
| 627 | 627 | if (rc) |
| 628 | 628 | return rc; |
| @@ -1055,7 +1055,7 @@ | ||
| 1055 | 1055 | */ |
| 1056 | 1056 | static int cs_sb_umount(struct vfsmount *mnt, int flags) |
| 1057 | 1057 | { |
| 1058 | - struct path path = { mnt, mnt->mnt_root }; | |
| 1058 | + struct path path = { .mnt = mnt, .dentry = mnt->mnt_root }; | |
| 1059 | 1059 | int rc = cs_umount_permission(&path, flags); |
| 1060 | 1060 | if (rc) |
| 1061 | 1061 | return rc; |
| @@ -625,7 +625,7 @@ | ||
| 625 | 625 | static int cs_path_chmod(struct dentry *dentry, struct vfsmount *vfsmnt, |
| 626 | 626 | mode_t mode) |
| 627 | 627 | { |
| 628 | - struct path path = { vfsmnt, dentry }; | |
| 628 | + struct path path = { .mnt = vfsmnt, .dentry = dentry }; | |
| 629 | 629 | int rc = cs_chmod_permission(&path, mode); |
| 630 | 630 | if (rc) |
| 631 | 631 | return rc; |
| @@ -708,7 +708,7 @@ | ||
| 708 | 708 | { |
| 709 | 709 | int rc = 0; |
| 710 | 710 | #if !defined(CONFIG_SECURITY_PATH) || LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) |
| 711 | - struct path path = { NULL, dentry }; | |
| 711 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 712 | 712 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0) |
| 713 | 713 | if (attr->ia_valid & ATTR_UID) |
| 714 | 714 | rc = cs_chown_permission(&path, attr->ia_uid, INVALID_GID); |
| @@ -763,7 +763,7 @@ | ||
| 763 | 763 | */ |
| 764 | 764 | static int cs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) |
| 765 | 765 | { |
| 766 | - struct path path = { mnt, dentry }; | |
| 766 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 767 | 767 | int rc = cs_getattr_permission(&path); |
| 768 | 768 | if (rc) |
| 769 | 769 | return rc; |
| @@ -790,7 +790,7 @@ | ||
| 790 | 790 | static int cs_path_mknod(struct path *dir, struct dentry *dentry, |
| 791 | 791 | umode_t mode, unsigned int dev) |
| 792 | 792 | { |
| 793 | - struct path path = { dir->mnt, dentry }; | |
| 793 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 794 | 794 | int rc = cs_mknod_permission(&path, mode, dev); |
| 795 | 795 | if (rc) |
| 796 | 796 | return rc; |
| @@ -810,7 +810,7 @@ | ||
| 810 | 810 | static int cs_path_mkdir(struct path *dir, struct dentry *dentry, |
| 811 | 811 | umode_t mode) |
| 812 | 812 | { |
| 813 | - struct path path = { dir->mnt, dentry }; | |
| 813 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 814 | 814 | int rc = cs_mkdir_permission(&path, mode); |
| 815 | 815 | if (rc) |
| 816 | 816 | return rc; |
| @@ -833,7 +833,7 @@ | ||
| 833 | 833 | static int cs_path_mknod(struct path *dir, struct dentry *dentry, int mode, |
| 834 | 834 | unsigned int dev) |
| 835 | 835 | { |
| 836 | - struct path path = { dir->mnt, dentry }; | |
| 836 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 837 | 837 | int rc = cs_mknod_permission(&path, mode, dev); |
| 838 | 838 | if (rc) |
| 839 | 839 | return rc; |
| @@ -852,7 +852,7 @@ | ||
| 852 | 852 | */ |
| 853 | 853 | static int cs_path_mkdir(struct path *dir, struct dentry *dentry, int mode) |
| 854 | 854 | { |
| 855 | - struct path path = { dir->mnt, dentry }; | |
| 855 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 856 | 856 | int rc = cs_mkdir_permission(&path, mode); |
| 857 | 857 | if (rc) |
| 858 | 858 | return rc; |
| @@ -872,7 +872,7 @@ | ||
| 872 | 872 | */ |
| 873 | 873 | static int cs_path_rmdir(struct path *dir, struct dentry *dentry) |
| 874 | 874 | { |
| 875 | - struct path path = { dir->mnt, dentry }; | |
| 875 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 876 | 876 | int rc = cs_rmdir_permission(&path); |
| 877 | 877 | if (rc) |
| 878 | 878 | return rc; |
| @@ -890,7 +890,7 @@ | ||
| 890 | 890 | */ |
| 891 | 891 | static int cs_path_unlink(struct path *dir, struct dentry *dentry) |
| 892 | 892 | { |
| 893 | - struct path path = { dir->mnt, dentry }; | |
| 893 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 894 | 894 | int rc = cs_unlink_permission(&path); |
| 895 | 895 | if (rc) |
| 896 | 896 | return rc; |
| @@ -910,7 +910,7 @@ | ||
| 910 | 910 | static int cs_path_symlink(struct path *dir, struct dentry *dentry, |
| 911 | 911 | const char *old_name) |
| 912 | 912 | { |
| 913 | - struct path path = { dir->mnt, dentry }; | |
| 913 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 914 | 914 | int rc = cs_symlink_permission(&path, old_name); |
| 915 | 915 | if (rc) |
| 916 | 916 | return rc; |
| @@ -980,7 +980,7 @@ | ||
| 980 | 980 | static int cs_inode_mknod(struct inode *dir, struct dentry *dentry, |
| 981 | 981 | umode_t mode, dev_t dev) |
| 982 | 982 | { |
| 983 | - struct path path = { NULL, dentry }; | |
| 983 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 984 | 984 | int rc = cs_mknod_permission(&path, mode, dev); |
| 985 | 985 | if (rc) |
| 986 | 986 | return rc; |
| @@ -1000,7 +1000,7 @@ | ||
| 1000 | 1000 | static int cs_inode_mkdir(struct inode *dir, struct dentry *dentry, |
| 1001 | 1001 | umode_t mode) |
| 1002 | 1002 | { |
| 1003 | - struct path path = { NULL, dentry }; | |
| 1003 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1004 | 1004 | int rc = cs_mkdir_permission(&path, mode); |
| 1005 | 1005 | if (rc) |
| 1006 | 1006 | return rc; |
| @@ -1023,7 +1023,7 @@ | ||
| 1023 | 1023 | static int cs_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, |
| 1024 | 1024 | dev_t dev) |
| 1025 | 1025 | { |
| 1026 | - struct path path = { NULL, dentry }; | |
| 1026 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1027 | 1027 | int rc = cs_mknod_permission(&path, mode, dev); |
| 1028 | 1028 | if (rc) |
| 1029 | 1029 | return rc; |
| @@ -1042,7 +1042,7 @@ | ||
| 1042 | 1042 | */ |
| 1043 | 1043 | static int cs_inode_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
| 1044 | 1044 | { |
| 1045 | - struct path path = { NULL, dentry }; | |
| 1045 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1046 | 1046 | int rc = cs_mkdir_permission(&path, mode); |
| 1047 | 1047 | if (rc) |
| 1048 | 1048 | return rc; |
| @@ -1062,7 +1062,7 @@ | ||
| 1062 | 1062 | */ |
| 1063 | 1063 | static int cs_inode_rmdir(struct inode *dir, struct dentry *dentry) |
| 1064 | 1064 | { |
| 1065 | - struct path path = { NULL, dentry }; | |
| 1065 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1066 | 1066 | int rc = cs_rmdir_permission(&path); |
| 1067 | 1067 | if (rc) |
| 1068 | 1068 | return rc; |
| @@ -1080,7 +1080,7 @@ | ||
| 1080 | 1080 | */ |
| 1081 | 1081 | static int cs_inode_unlink(struct inode *dir, struct dentry *dentry) |
| 1082 | 1082 | { |
| 1083 | - struct path path = { NULL, dentry }; | |
| 1083 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1084 | 1084 | int rc = cs_unlink_permission(&path); |
| 1085 | 1085 | if (rc) |
| 1086 | 1086 | return rc; |
| @@ -1100,7 +1100,7 @@ | ||
| 1100 | 1100 | static int cs_inode_symlink(struct inode *dir, struct dentry *dentry, |
| 1101 | 1101 | const char *old_name) |
| 1102 | 1102 | { |
| 1103 | - struct path path = { NULL, dentry }; | |
| 1103 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1104 | 1104 | int rc = cs_symlink_permission(&path, old_name); |
| 1105 | 1105 | if (rc) |
| 1106 | 1106 | return rc; |
| @@ -1166,7 +1166,7 @@ | ||
| 1166 | 1166 | static int cs_inode_create(struct inode *dir, struct dentry *dentry, |
| 1167 | 1167 | umode_t mode) |
| 1168 | 1168 | { |
| 1169 | - struct path path = { NULL, dentry }; | |
| 1169 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1170 | 1170 | int rc = cs_mknod_permission(&path, mode, 0); |
| 1171 | 1171 | if (rc) |
| 1172 | 1172 | return rc; |
| @@ -1188,7 +1188,7 @@ | ||
| 1188 | 1188 | static int cs_inode_create(struct inode *dir, struct dentry *dentry, |
| 1189 | 1189 | int mode) |
| 1190 | 1190 | { |
| 1191 | - struct path path = { NULL, dentry }; | |
| 1191 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 1192 | 1192 | int rc = cs_mknod_permission(&path, mode, 0); |
| 1193 | 1193 | if (rc) |
| 1194 | 1194 | return rc; |
| @@ -1670,7 +1670,7 @@ | ||
| 1670 | 1670 | */ |
| 1671 | 1671 | static int cs_sb_umount(struct vfsmount *mnt, int flags) |
| 1672 | 1672 | { |
| 1673 | - struct path path = { mnt, mnt->mnt_root }; | |
| 1673 | + struct path path = { .mnt = mnt, .dentry = mnt->mnt_root }; | |
| 1674 | 1674 | int rc = cs_umount_permission(&path, flags); |
| 1675 | 1675 | if (rc) |
| 1676 | 1676 | return rc; |
| @@ -8,7 +8,7 @@ | ||
| 8 | 8 | |
| 9 | 9 | #include <linux/version.h> |
| 10 | 10 | #include <linux/security.h> |
| 11 | -#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0) && !defined(SECURITY_NAME_MAX) | |
| 11 | +#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) | |
| 12 | 12 | #include "lsm-4.2.c" |
| 13 | 13 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29) |
| 14 | 14 | #include "lsm-2.6.29.c" |
| @@ -483,7 +483,7 @@ | ||
| 483 | 483 | static int cs_inode_setattr(struct dentry *dentry, struct iattr *attr) |
| 484 | 484 | { |
| 485 | 485 | int rc = 0; |
| 486 | - struct path path = { NULL, dentry }; | |
| 486 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 487 | 487 | if (attr->ia_valid & ATTR_UID) |
| 488 | 488 | rc = cs_chown_permission(&path, attr->ia_uid, INVALID_GID); |
| 489 | 489 | if (!rc && (attr->ia_valid & ATTR_GID)) |
| @@ -524,7 +524,7 @@ | ||
| 524 | 524 | static int cs_path_mknod(struct path *dir, struct dentry *dentry, |
| 525 | 525 | umode_t mode, unsigned int dev) |
| 526 | 526 | { |
| 527 | - struct path path = { dir->mnt, dentry }; | |
| 527 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 528 | 528 | return cs_mknod_permission(&path, mode, dev); |
| 529 | 529 | } |
| 530 | 530 |
| @@ -540,7 +540,7 @@ | ||
| 540 | 540 | static int cs_path_mkdir(struct path *dir, struct dentry *dentry, |
| 541 | 541 | umode_t mode) |
| 542 | 542 | { |
| 543 | - struct path path = { dir->mnt, dentry }; | |
| 543 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 544 | 544 | return cs_mkdir_permission(&path, mode); |
| 545 | 545 | } |
| 546 | 546 |
| @@ -554,7 +554,7 @@ | ||
| 554 | 554 | */ |
| 555 | 555 | static int cs_path_rmdir(struct path *dir, struct dentry *dentry) |
| 556 | 556 | { |
| 557 | - struct path path = { dir->mnt, dentry }; | |
| 557 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 558 | 558 | return cs_rmdir_permission(&path); |
| 559 | 559 | } |
| 560 | 560 |
| @@ -568,7 +568,7 @@ | ||
| 568 | 568 | */ |
| 569 | 569 | static int cs_path_unlink(struct path *dir, struct dentry *dentry) |
| 570 | 570 | { |
| 571 | - struct path path = { dir->mnt, dentry }; | |
| 571 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 572 | 572 | return cs_unlink_permission(&path); |
| 573 | 573 | } |
| 574 | 574 |
| @@ -584,7 +584,7 @@ | ||
| 584 | 584 | static int cs_path_symlink(struct path *dir, struct dentry *dentry, |
| 585 | 585 | const char *old_name) |
| 586 | 586 | { |
| 587 | - struct path path = { dir->mnt, dentry }; | |
| 587 | + struct path path = { .mnt = dir->mnt, .dentry = dentry }; | |
| 588 | 588 | return cs_symlink_permission(&path, old_name); |
| 589 | 589 | } |
| 590 | 590 |
| @@ -638,7 +638,7 @@ | ||
| 638 | 638 | static int cs_inode_mknod(struct inode *dir, struct dentry *dentry, |
| 639 | 639 | umode_t mode, dev_t dev) |
| 640 | 640 | { |
| 641 | - struct path path = { NULL, dentry }; | |
| 641 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 642 | 642 | return cs_mknod_permission(&path, mode, dev); |
| 643 | 643 | } |
| 644 | 644 |
| @@ -654,7 +654,7 @@ | ||
| 654 | 654 | static int cs_inode_mkdir(struct inode *dir, struct dentry *dentry, |
| 655 | 655 | umode_t mode) |
| 656 | 656 | { |
| 657 | - struct path path = { NULL, dentry }; | |
| 657 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 658 | 658 | return cs_mkdir_permission(&path, mode); |
| 659 | 659 | } |
| 660 | 660 |
| @@ -668,7 +668,7 @@ | ||
| 668 | 668 | */ |
| 669 | 669 | static int cs_inode_rmdir(struct inode *dir, struct dentry *dentry) |
| 670 | 670 | { |
| 671 | - struct path path = { NULL, dentry }; | |
| 671 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 672 | 672 | return cs_rmdir_permission(&path); |
| 673 | 673 | } |
| 674 | 674 |
| @@ -682,7 +682,7 @@ | ||
| 682 | 682 | */ |
| 683 | 683 | static int cs_inode_unlink(struct inode *dir, struct dentry *dentry) |
| 684 | 684 | { |
| 685 | - struct path path = { NULL, dentry }; | |
| 685 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 686 | 686 | return cs_unlink_permission(&path); |
| 687 | 687 | } |
| 688 | 688 |
| @@ -698,7 +698,7 @@ | ||
| 698 | 698 | static int cs_inode_symlink(struct inode *dir, struct dentry *dentry, |
| 699 | 699 | const char *old_name) |
| 700 | 700 | { |
| 701 | - struct path path = { NULL, dentry }; | |
| 701 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 702 | 702 | return cs_symlink_permission(&path, old_name); |
| 703 | 703 | } |
| 704 | 704 |
| @@ -749,7 +749,7 @@ | ||
| 749 | 749 | static int cs_inode_create(struct inode *dir, struct dentry *dentry, |
| 750 | 750 | umode_t mode) |
| 751 | 751 | { |
| 752 | - struct path path = { NULL, dentry }; | |
| 752 | + struct path path = { .mnt = NULL, .dentry = dentry }; | |
| 753 | 753 | return cs_mknod_permission(&path, mode, 0); |
| 754 | 754 | } |
| 755 | 755 |
| @@ -1123,7 +1123,7 @@ | ||
| 1123 | 1123 | */ |
| 1124 | 1124 | static int cs_sb_umount(struct vfsmount *mnt, int flags) |
| 1125 | 1125 | { |
| 1126 | - struct path path = { mnt, mnt->mnt_root }; | |
| 1126 | + struct path path = { .mnt = mnt, .dentry = mnt->mnt_root }; | |
| 1127 | 1127 | return cs_umount_permission(&path, flags); |
| 1128 | 1128 | } |
| 1129 | 1129 |
| @@ -100,7 +100,7 @@ | ||
| 100 | 100 | mntput(mnt); |
| 101 | 101 | else { |
| 102 | 102 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0) |
| 103 | - struct path path = { mnt, dentry }; | |
| 103 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 104 | 104 | file = dentry_open(&path, O_RDONLY, current_cred()); |
| 105 | 105 | #else |
| 106 | 106 | file = dentry_open(dentry, mnt, O_RDONLY |
| @@ -439,7 +439,7 @@ | ||
| 439 | 439 | struct iattr *attr) |
| 440 | 440 | { |
| 441 | 441 | int rc = 0; |
| 442 | - struct path path = { mnt, dentry }; | |
| 442 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 443 | 443 | if (attr->ia_valid & ATTR_UID) |
| 444 | 444 | rc = cs_chown_permission(&path, attr->ia_uid, -1); |
| 445 | 445 | if (!rc && (attr->ia_valid & ATTR_GID)) |
| @@ -464,7 +464,7 @@ | ||
| 464 | 464 | */ |
| 465 | 465 | static int cs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) |
| 466 | 466 | { |
| 467 | - struct path path = { mnt, dentry }; | |
| 467 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 468 | 468 | int rc = cs_getattr_permission(&path); |
| 469 | 469 | if (rc) |
| 470 | 470 | return rc; |
| @@ -486,7 +486,7 @@ | ||
| 486 | 486 | static int cs_inode_mknod(struct inode *dir, struct dentry *dentry, |
| 487 | 487 | struct vfsmount *mnt, int mode, dev_t dev) |
| 488 | 488 | { |
| 489 | - struct path path = { mnt, dentry }; | |
| 489 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 490 | 490 | int rc = cs_mknod_permission(&path, mode, dev); |
| 491 | 491 | if (rc) |
| 492 | 492 | return rc; |
| @@ -507,7 +507,7 @@ | ||
| 507 | 507 | static int cs_inode_mkdir(struct inode *dir, struct dentry *dentry, |
| 508 | 508 | struct vfsmount *mnt, int mode) |
| 509 | 509 | { |
| 510 | - struct path path = { mnt, dentry }; | |
| 510 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 511 | 511 | int rc = cs_mkdir_permission(&path, mode); |
| 512 | 512 | if (rc) |
| 513 | 513 | return rc; |
| @@ -527,7 +527,7 @@ | ||
| 527 | 527 | static int cs_inode_rmdir(struct inode *dir, struct dentry *dentry, |
| 528 | 528 | struct vfsmount *mnt) |
| 529 | 529 | { |
| 530 | - struct path path = { mnt, dentry }; | |
| 530 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 531 | 531 | int rc = cs_rmdir_permission(&path); |
| 532 | 532 | if (rc) |
| 533 | 533 | return rc; |
| @@ -547,7 +547,7 @@ | ||
| 547 | 547 | static int cs_inode_unlink(struct inode *dir, struct dentry *dentry, |
| 548 | 548 | struct vfsmount *mnt) |
| 549 | 549 | { |
| 550 | - struct path path = { mnt, dentry }; | |
| 550 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 551 | 551 | int rc = cs_unlink_permission(&path); |
| 552 | 552 | if (rc) |
| 553 | 553 | return rc; |
| @@ -568,7 +568,7 @@ | ||
| 568 | 568 | static int cs_inode_symlink(struct inode *dir, struct dentry *dentry, |
| 569 | 569 | struct vfsmount *mnt, const char *old_name) |
| 570 | 570 | { |
| 571 | - struct path path = { mnt, dentry }; | |
| 571 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 572 | 572 | int rc = cs_symlink_permission(&path, old_name); |
| 573 | 573 | if (rc) |
| 574 | 574 | return rc; |
| @@ -642,7 +642,7 @@ | ||
| 642 | 642 | static int cs_inode_create(struct inode *dir, struct dentry *dentry, |
| 643 | 643 | struct vfsmount *mnt, int mode) |
| 644 | 644 | { |
| 645 | - struct path path = { mnt, dentry }; | |
| 645 | + struct path path = { .mnt = mnt, .dentry = dentry }; | |
| 646 | 646 | int rc = cs_mknod_permission(&path, mode, 0); |
| 647 | 647 | if (rc) |
| 648 | 648 | return rc; |
| @@ -1075,7 +1075,7 @@ | ||
| 1075 | 1075 | */ |
| 1076 | 1076 | static int cs_sb_umount(struct vfsmount *mnt, int flags) |
| 1077 | 1077 | { |
| 1078 | - struct path path = { mnt, mnt->mnt_root }; | |
| 1078 | + struct path path = { .mnt = mnt, .dentry = mnt->mnt_root }; | |
| 1079 | 1079 | int rc = cs_umount_permission(&path, flags); |
| 1080 | 1080 | if (rc) |
| 1081 | 1081 | return rc; |