#include "common.h"
#include <linux/slab.h>
-/* Keyword array for single path operations. */
+/* Keyword array for operations with one pathname. */
static const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
[TOMOYO_TYPE_READ_WRITE] = "read/write",
[TOMOYO_TYPE_EXECUTE] = "execute",
[TOMOYO_TYPE_READ] = "read",
[TOMOYO_TYPE_WRITE] = "write",
- [TOMOYO_TYPE_CREATE] = "create",
[TOMOYO_TYPE_UNLINK] = "unlink",
- [TOMOYO_TYPE_MKDIR] = "mkdir",
[TOMOYO_TYPE_RMDIR] = "rmdir",
- [TOMOYO_TYPE_MKFIFO] = "mkfifo",
- [TOMOYO_TYPE_MKSOCK] = "mksock",
- [TOMOYO_TYPE_MKBLOCK] = "mkblock",
- [TOMOYO_TYPE_MKCHAR] = "mkchar",
[TOMOYO_TYPE_TRUNCATE] = "truncate",
[TOMOYO_TYPE_SYMLINK] = "symlink",
[TOMOYO_TYPE_REWRITE] = "rewrite",
- [TOMOYO_TYPE_IOCTL] = "ioctl",
- [TOMOYO_TYPE_CHMOD] = "chmod",
- [TOMOYO_TYPE_CHOWN] = "chown",
- [TOMOYO_TYPE_CHGRP] = "chgrp",
[TOMOYO_TYPE_CHROOT] = "chroot",
[TOMOYO_TYPE_MOUNT] = "mount",
[TOMOYO_TYPE_UMOUNT] = "unmount",
};
-/* Keyword array for double path operations. */
+/* Keyword array for operations with one pathname and three numbers. */
+static const char *tomoyo_path_number3_keyword
+[TOMOYO_MAX_PATH_NUMBER3_OPERATION] = {
+ [TOMOYO_TYPE_MKBLOCK] = "mkblock",
+ [TOMOYO_TYPE_MKCHAR] = "mkchar",
+};
+
+/* Keyword array for operations with two pathnames. */
static const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION] = {
- [TOMOYO_TYPE_LINK] = "link",
- [TOMOYO_TYPE_RENAME] = "rename",
+ [TOMOYO_TYPE_LINK] = "link",
+ [TOMOYO_TYPE_RENAME] = "rename",
[TOMOYO_TYPE_PIVOT_ROOT] = "pivot_root",
};
+/* Keyword array for operations with one pathname and one number. */
+static const char *tomoyo_path_number_keyword
+[TOMOYO_MAX_PATH_NUMBER_OPERATION] = {
+ [TOMOYO_TYPE_CREATE] = "create",
+ [TOMOYO_TYPE_MKDIR] = "mkdir",
+ [TOMOYO_TYPE_MKFIFO] = "mkfifo",
+ [TOMOYO_TYPE_MKSOCK] = "mksock",
+ [TOMOYO_TYPE_IOCTL] = "ioctl",
+ [TOMOYO_TYPE_CHMOD] = "chmod",
+ [TOMOYO_TYPE_CHOWN] = "chown",
+ [TOMOYO_TYPE_CHGRP] = "chgrp",
+};
+
void tomoyo_put_name_union(struct tomoyo_name_union *ptr)
{
if (!ptr)
return false;
}
+void tomoyo_put_number_union(struct tomoyo_number_union *ptr)
+{
+ if (ptr && ptr->is_group)
+ tomoyo_put_number_group(ptr->group);
+}
+
+bool tomoyo_compare_number_union(const unsigned long value,
+ const struct tomoyo_number_union *ptr)
+{
+ if (ptr->is_group)
+ return tomoyo_number_matches_group(value, value, ptr->group);
+ return value >= ptr->values[0] && value <= ptr->values[1];
+}
+
+/**
+ * tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
+ *
+ * @r: Pointer to "struct tomoyo_request_info" to initialize.
+ * @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
+ *
+ * Returns mode.
+ */
+static int tomoyo_init_request_info(struct tomoyo_request_info *r,
+ struct tomoyo_domain_info *domain)
+{
+ memset(r, 0, sizeof(*r));
+ if (!domain)
+ domain = tomoyo_domain();
+ r->domain = domain;
+ r->mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+ return r->mode;
+}
+
+static void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
+ __attribute__ ((format(printf, 2, 3)));
+/**
+ * tomoyo_warn_log - Print warning or error message on console.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @fmt: The printf()'s format string, followed by parameters.
+ */
+static void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
+{
+ int len = PAGE_SIZE;
+ va_list args;
+ char *buffer;
+ if (!tomoyo_verbose_mode(r->domain))
+ return;
+ while (1) {
+ int len2;
+ buffer = kmalloc(len, GFP_NOFS);
+ if (!buffer)
+ return;
+ va_start(args, fmt);
+ len2 = vsnprintf(buffer, len - 1, fmt, args);
+ va_end(args);
+ if (len2 <= len - 1) {
+ buffer[len2] = '\0';
+ break;
+ }
+ len = len2 + 1;
+ kfree(buffer);
+ }
+ printk(KERN_WARNING "TOMOYO-%s: Access %s denied for %s\n",
+ r->mode == TOMOYO_CONFIG_ENFORCING ? "ERROR" : "WARNING",
+ buffer, tomoyo_get_last_name(r->domain));
+ kfree(buffer);
+}
+
/**
* tomoyo_path2keyword - Get the name of single path operation.
*
? tomoyo_path_keyword[operation] : NULL;
}
+/**
+ * tomoyo_path_number32keyword - Get the name of path/number/number/number operations.
+ *
+ * @operation: Type of operation.
+ *
+ * Returns the name of path/number/number/number operation.
+ */
+const char *tomoyo_path_number32keyword(const u8 operation)
+{
+ return (operation < TOMOYO_MAX_PATH_NUMBER3_OPERATION)
+ ? tomoyo_path_number3_keyword[operation] : NULL;
+}
+
/**
* tomoyo_path22keyword - Get the name of double path operation.
*
? tomoyo_path2_keyword[operation] : NULL;
}
+/**
+ * tomoyo_path_number2keyword - Get the name of path/number operations.
+ *
+ * @operation: Type of operation.
+ *
+ * Returns the name of path/number operation.
+ */
+const char *tomoyo_path_number2keyword(const u8 operation)
+{
+ return (operation < TOMOYO_MAX_PATH_NUMBER_OPERATION)
+ ? tomoyo_path_number_keyword[operation] : NULL;
+}
+
/**
* tomoyo_strendswith - Check whether the token ends with the given token.
*
/**
* tomoyo_update_file_acl - Update file's read/write/execute ACL.
*
- * @filename: Filename.
* @perm: Permission (between 1 to 7).
+ * @filename: Filename.
* @domain: Pointer to "struct tomoyo_domain_info".
* @is_delete: True if it is a delete request.
*
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_update_file_acl(const char *filename, u8 perm,
+static int tomoyo_update_file_acl(u8 perm, const char *filename,
struct tomoyo_domain_info * const domain,
const bool is_delete)
{
}
/**
- * tomoyo_path_acl2 - Check permission for single path operation.
+ * tomoyo_path_acl - Check permission for single path operation.
*
- * @domain: Pointer to "struct tomoyo_domain_info".
+ * @r: Pointer to "struct tomoyo_request_info".
* @filename: Filename to check.
* @perm: Permission.
* @may_use_pattern: True if patterned ACL is permitted.
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_path_acl2(const struct tomoyo_domain_info *domain,
- const struct tomoyo_path_info *filename,
- const u32 perm, const bool may_use_pattern)
+static int tomoyo_path_acl(const struct tomoyo_request_info *r,
+ const struct tomoyo_path_info *filename,
+ const u32 perm, const bool may_use_pattern)
{
+ struct tomoyo_domain_info *domain = r->domain;
struct tomoyo_acl_info *ptr;
int error = -EPERM;
if (ptr->type != TOMOYO_TYPE_PATH_ACL)
continue;
acl = container_of(ptr, struct tomoyo_path_acl, head);
- if (perm <= 0xFFFF) {
- if (!(acl->perm & perm))
- continue;
- } else {
- if (!(acl->perm_high & (perm >> 16)))
- continue;
- }
- if (!tomoyo_compare_name_union_pattern(filename, &acl->name,
+ if (!(acl->perm & perm) ||
+ !tomoyo_compare_name_union_pattern(filename, &acl->name,
may_use_pattern))
continue;
error = 0;
}
/**
- * tomoyo_check_file_acl - Check permission for opening files.
- *
- * @domain: Pointer to "struct tomoyo_domain_info".
- * @filename: Filename to check.
- * @operation: Mode ("read" or "write" or "read/write" or "execute").
- *
- * Returns 0 on success, -EPERM otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static int tomoyo_check_file_acl(const struct tomoyo_domain_info *domain,
- const struct tomoyo_path_info *filename,
- const u8 operation)
-{
- u32 perm = 0;
-
- if (!tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE))
- return 0;
- if (operation == 6)
- perm = 1 << TOMOYO_TYPE_READ_WRITE;
- else if (operation == 4)
- perm = 1 << TOMOYO_TYPE_READ;
- else if (operation == 2)
- perm = 1 << TOMOYO_TYPE_WRITE;
- else if (operation == 1)
- perm = 1 << TOMOYO_TYPE_EXECUTE;
- else
- BUG();
- return tomoyo_path_acl2(domain, filename, perm, operation != 1);
-}
-
-/**
- * tomoyo_check_file_perm2 - Check permission for opening files.
+ * tomoyo_file_perm - Check permission for opening files.
*
- * @domain: Pointer to "struct tomoyo_domain_info".
+ * @r: Pointer to "struct tomoyo_request_info".
* @filename: Filename to check.
- * @perm: Mode ("read" or "write" or "read/write" or "execute").
- * @operation: Operation name passed used for verbose mode.
- * @mode: Access control mode.
+ * @mode: Mode ("read" or "write" or "read/write" or "execute").
*
* Returns 0 on success, negative value otherwise.
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_check_file_perm2(struct tomoyo_domain_info * const domain,
- const struct tomoyo_path_info *filename,
- const u8 perm, const char *operation,
- const u8 mode)
+static int tomoyo_file_perm(struct tomoyo_request_info *r,
+ const struct tomoyo_path_info *filename,
+ const u8 mode)
{
- const bool is_enforce = (mode == 3);
const char *msg = "<unknown>";
int error = 0;
+ u32 perm = 0;
if (!filename)
return 0;
- error = tomoyo_check_file_acl(domain, filename, perm);
- if (error && perm == 4 && !domain->ignore_global_allow_read
- && tomoyo_is_globally_readable_file(filename))
- error = 0;
- if (perm == 6)
+
+ if (mode == 6) {
msg = tomoyo_path2keyword(TOMOYO_TYPE_READ_WRITE);
- else if (perm == 4)
+ perm = 1 << TOMOYO_TYPE_READ_WRITE;
+ } else if (mode == 4) {
msg = tomoyo_path2keyword(TOMOYO_TYPE_READ);
- else if (perm == 2)
+ perm = 1 << TOMOYO_TYPE_READ;
+ } else if (mode == 2) {
msg = tomoyo_path2keyword(TOMOYO_TYPE_WRITE);
- else if (perm == 1)
+ perm = 1 << TOMOYO_TYPE_WRITE;
+ } else if (mode == 1) {
msg = tomoyo_path2keyword(TOMOYO_TYPE_EXECUTE);
- else
+ perm = 1 << TOMOYO_TYPE_EXECUTE;
+ } else
BUG();
+ error = tomoyo_path_acl(r, filename, perm, mode != 1);
+ if (error && mode == 4 && !r->domain->ignore_global_allow_read
+ && tomoyo_is_globally_readable_file(filename))
+ error = 0;
if (!error)
return 0;
- if (tomoyo_verbose_mode(domain))
- printk(KERN_WARNING "TOMOYO-%s: Access '%s(%s) %s' denied "
- "for %s\n", tomoyo_get_msg(is_enforce), msg, operation,
- filename->name, tomoyo_get_last_name(domain));
- if (is_enforce)
+ tomoyo_warn_log(r, "%s %s", msg, filename->name);
+ if (r->mode == TOMOYO_CONFIG_ENFORCING)
return error;
- if (mode == 1 && tomoyo_domain_quota_is_ok(domain)) {
+ if (tomoyo_domain_quota_is_ok(r)) {
/* Don't use patterns for execute permission. */
- const struct tomoyo_path_info *patterned_file = (perm != 1) ?
+ const struct tomoyo_path_info *patterned_file = (mode != 1) ?
tomoyo_get_file_pattern(filename) : filename;
- tomoyo_update_file_acl(patterned_file->name, perm,
- domain, false);
+ tomoyo_update_file_acl(mode, patterned_file->name, r->domain,
+ false);
}
return 0;
}
-/**
- * tomoyo_write_file_policy - Update file related list.
- *
- * @data: String to parse.
- * @domain: Pointer to "struct tomoyo_domain_info".
- * @is_delete: True if it is a delete request.
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
- const bool is_delete)
-{
- char *filename = strchr(data, ' ');
- char *filename2;
- unsigned int perm;
- u8 type;
-
- if (!filename)
- return -EINVAL;
- *filename++ = '\0';
- if (sscanf(data, "%u", &perm) == 1)
- return tomoyo_update_file_acl(filename, (u8) perm, domain,
- is_delete);
- if (strncmp(data, "allow_", 6))
- goto out;
- data += 6;
- for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
- if (strcmp(data, tomoyo_path_keyword[type]))
- continue;
- return tomoyo_update_path_acl(type, filename, domain,
- is_delete);
- }
- filename2 = strchr(filename, ' ');
- if (!filename2)
- goto out;
- *filename2++ = '\0';
- for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
- if (strcmp(data, tomoyo_path2_keyword[type]))
- continue;
- return tomoyo_update_path2_acl(type, filename, filename2,
- domain, is_delete);
- }
- out:
- return -EINVAL;
-}
-
/**
* tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
*
struct tomoyo_domain_info *const domain,
const bool is_delete)
{
- static const u32 tomoyo_rw_mask =
+ static const u16 tomoyo_rw_mask =
(1 << TOMOYO_TYPE_READ) | (1 << TOMOYO_TYPE_WRITE);
- const u32 perm = 1 << type;
+ const u16 perm = 1 << type;
struct tomoyo_acl_info *ptr;
struct tomoyo_path_acl e = {
.head.type = TOMOYO_TYPE_PATH_ACL,
- .perm_high = perm >> 16,
.perm = perm
};
int error = is_delete ? -ENOENT : -ENOMEM;
if (!tomoyo_is_same_path_acl(acl, &e))
continue;
if (is_delete) {
- if (perm <= 0xFFFF)
- acl->perm &= ~perm;
- else
- acl->perm_high &= ~(perm >> 16);
+ acl->perm &= ~perm;
if ((acl->perm & tomoyo_rw_mask) != tomoyo_rw_mask)
acl->perm &= ~(1 << TOMOYO_TYPE_READ_WRITE);
else if (!(acl->perm & (1 << TOMOYO_TYPE_READ_WRITE)))
acl->perm &= ~tomoyo_rw_mask;
} else {
- if (perm <= 0xFFFF)
- acl->perm |= perm;
- else
- acl->perm_high |= (perm >> 16);
+ acl->perm |= perm;
if ((acl->perm & tomoyo_rw_mask) == tomoyo_rw_mask)
acl->perm |= 1 << TOMOYO_TYPE_READ_WRITE;
else if (acl->perm & (1 << TOMOYO_TYPE_READ_WRITE))
return error;
}
+/**
+ * tomoyo_update_path_number3_acl - Update "struct tomoyo_path_number3_acl" list.
+ *
+ * @type: Type of operation.
+ * @filename: Filename.
+ * @mode: Create mode.
+ * @major: Device major number.
+ * @minor: Device minor number.
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static inline int tomoyo_update_path_number3_acl(const u8 type,
+ const char *filename,
+ char *mode,
+ char *major, char *minor,
+ struct tomoyo_domain_info *
+ const domain,
+ const bool is_delete)
+{
+ const u8 perm = 1 << type;
+ struct tomoyo_acl_info *ptr;
+ struct tomoyo_path_number3_acl e = {
+ .head.type = TOMOYO_TYPE_PATH_NUMBER3_ACL,
+ .perm = perm
+ };
+ int error = is_delete ? -ENOENT : -ENOMEM;
+ if (!tomoyo_parse_name_union(filename, &e.name) ||
+ !tomoyo_parse_number_union(mode, &e.mode) ||
+ !tomoyo_parse_number_union(major, &e.major) ||
+ !tomoyo_parse_number_union(minor, &e.minor))
+ goto out;
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+ struct tomoyo_path_number3_acl *acl =
+ container_of(ptr, struct tomoyo_path_number3_acl, head);
+ if (!tomoyo_is_same_path_number3_acl(acl, &e))
+ continue;
+ if (is_delete)
+ acl->perm &= ~perm;
+ else
+ acl->perm |= perm;
+ error = 0;
+ break;
+ }
+ if (!is_delete && error) {
+ struct tomoyo_path_number3_acl *entry =
+ tomoyo_commit_ok(&e, sizeof(e));
+ if (entry) {
+ list_add_tail_rcu(&entry->head.list,
+ &domain->acl_info_list);
+ error = 0;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ out:
+ tomoyo_put_name_union(&e.name);
+ tomoyo_put_number_union(&e.mode);
+ tomoyo_put_number_union(&e.major);
+ tomoyo_put_number_union(&e.minor);
+ return error;
+}
+
/**
* tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
*
}
/**
- * tomoyo_path_acl - Check permission for single path operation.
+ * tomoyo_path_number3_acl - Check permission for path/number/number/number operation.
*
- * @domain: Pointer to "struct tomoyo_domain_info".
- * @type: Type of operation.
+ * @r: Pointer to "struct tomoyo_request_info".
* @filename: Filename to check.
+ * @perm: Permission.
+ * @mode: Create mode.
+ * @major: Device major number.
+ * @minor: Device minor number.
*
- * Returns 0 on success, negative value otherwise.
+ * Returns 0 on success, -EPERM otherwise.
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_path_acl(struct tomoyo_domain_info *domain, const u8 type,
- const struct tomoyo_path_info *filename)
+static int tomoyo_path_number3_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_path_info *filename,
+ const u16 perm, const unsigned int mode,
+ const unsigned int major,
+ const unsigned int minor)
{
- if (!tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE))
- return 0;
- return tomoyo_path_acl2(domain, filename, 1 << type, 1);
+ struct tomoyo_domain_info *domain = r->domain;
+ struct tomoyo_acl_info *ptr;
+ int error = -EPERM;
+ list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+ struct tomoyo_path_number3_acl *acl;
+ if (ptr->type != TOMOYO_TYPE_PATH_NUMBER3_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_path_number3_acl, head);
+ if (!tomoyo_compare_number_union(mode, &acl->mode))
+ continue;
+ if (!tomoyo_compare_number_union(major, &acl->major))
+ continue;
+ if (!tomoyo_compare_number_union(minor, &acl->minor))
+ continue;
+ if (!(acl->perm & perm))
+ continue;
+ if (!tomoyo_compare_name_union(filename, &acl->name))
+ continue;
+ error = 0;
+ break;
+ }
+ return error;
}
/**
* tomoyo_path2_acl - Check permission for double path operation.
*
- * @domain: Pointer to "struct tomoyo_domain_info".
+ * @r: Pointer to "struct tomoyo_request_info".
* @type: Type of operation.
* @filename1: First filename to check.
* @filename2: Second filename to check.
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_path2_acl(const struct tomoyo_domain_info *domain,
- const u8 type,
+static int tomoyo_path2_acl(const struct tomoyo_request_info *r, const u8 type,
const struct tomoyo_path_info *filename1,
const struct tomoyo_path_info *filename2)
{
+ const struct tomoyo_domain_info *domain = r->domain;
struct tomoyo_acl_info *ptr;
const u8 perm = 1 << type;
int error = -EPERM;
- if (!tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE))
- return 0;
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
struct tomoyo_path2_acl *acl;
if (ptr->type != TOMOYO_TYPE_PATH2_ACL)
}
/**
- * tomoyo_path_permission2 - Check permission for single path operation.
+ * tomoyo_path_permission - Check permission for single path operation.
*
- * @domain: Pointer to "struct tomoyo_domain_info".
+ * @r: Pointer to "struct tomoyo_request_info".
* @operation: Type of operation.
* @filename: Filename to check.
- * @mode: Access control mode.
*
* Returns 0 on success, negative value otherwise.
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_path_permission2(struct tomoyo_domain_info *const domain,
- u8 operation,
- const struct tomoyo_path_info *filename,
- const u8 mode)
+static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
+ const struct tomoyo_path_info *filename)
{
- const char *msg;
int error;
- const bool is_enforce = (mode == 3);
- if (!mode)
- return 0;
next:
- error = tomoyo_path_acl(domain, operation, filename);
- msg = tomoyo_path2keyword(operation);
+ error = tomoyo_path_acl(r, filename, 1 << operation, 1);
if (!error)
goto ok;
- if (tomoyo_verbose_mode(domain))
- printk(KERN_WARNING "TOMOYO-%s: Access '%s %s' denied for %s\n",
- tomoyo_get_msg(is_enforce), msg, filename->name,
- tomoyo_get_last_name(domain));
- if (mode == 1 && tomoyo_domain_quota_is_ok(domain)) {
+ tomoyo_warn_log(r, "%s %s", tomoyo_path2keyword(operation),
+ filename->name);
+ if (tomoyo_domain_quota_is_ok(r)) {
const char *name = tomoyo_get_file_pattern(filename)->name;
- tomoyo_update_path_acl(operation, name, domain, false);
+ tomoyo_update_path_acl(operation, name, r->domain, false);
}
- if (!is_enforce)
+ if (r->mode != TOMOYO_CONFIG_ENFORCING)
error = 0;
ok:
/*
return error;
}
+/**
+ * tomoyo_path_number_acl - Check permission for ioctl/chmod/chown/chgrp operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @type: Operation.
+ * @filename: Filename to check.
+ * @number: Number.
+ *
+ * Returns 0 on success, -EPERM otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_path_number_acl(struct tomoyo_request_info *r, const u8 type,
+ const struct tomoyo_path_info *filename,
+ const unsigned long number)
+{
+ struct tomoyo_domain_info *domain = r->domain;
+ struct tomoyo_acl_info *ptr;
+ const u8 perm = 1 << type;
+ int error = -EPERM;
+ list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+ struct tomoyo_path_number_acl *acl;
+ if (ptr->type != TOMOYO_TYPE_PATH_NUMBER_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_path_number_acl,
+ head);
+ if (!(acl->perm & perm) ||
+ !tomoyo_compare_number_union(number, &acl->number) ||
+ !tomoyo_compare_name_union(filename, &acl->name))
+ continue;
+ error = 0;
+ break;
+ }
+ return error;
+}
+
+/**
+ * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
+ *
+ * @type: Type of operation.
+ * @filename: Filename.
+ * @number: Number.
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static inline int tomoyo_update_path_number_acl(const u8 type,
+ const char *filename,
+ char *number,
+ struct tomoyo_domain_info *
+ const domain,
+ const bool is_delete)
+{
+ const u8 perm = 1 << type;
+ struct tomoyo_acl_info *ptr;
+ struct tomoyo_path_number_acl e = {
+ .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL,
+ .perm = perm
+ };
+ int error = is_delete ? -ENOENT : -ENOMEM;
+ if (!domain)
+ return -EINVAL;
+ if (!tomoyo_parse_name_union(filename, &e.name))
+ return -EINVAL;
+ if (!tomoyo_parse_number_union(number, &e.number))
+ goto out;
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+ struct tomoyo_path_number_acl *acl =
+ container_of(ptr, struct tomoyo_path_number_acl, head);
+ if (!tomoyo_is_same_path_number_acl(acl, &e))
+ continue;
+ if (is_delete)
+ acl->perm &= ~perm;
+ else
+ acl->perm |= perm;
+ error = 0;
+ break;
+ }
+ if (!is_delete && error) {
+ struct tomoyo_path_number_acl *entry =
+ tomoyo_commit_ok(&e, sizeof(e));
+ if (entry) {
+ list_add_tail_rcu(&entry->head.list,
+ &domain->acl_info_list);
+ error = 0;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ out:
+ tomoyo_put_name_union(&e.name);
+ tomoyo_put_number_union(&e.number);
+ return error;
+}
+
+/**
+ * tomoyo_path_number_perm2 - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
+ *
+ * @r: Pointer to "strct tomoyo_request_info".
+ * @filename: Filename to check.
+ * @number: Number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_path_number_perm2(struct tomoyo_request_info *r,
+ const u8 type,
+ const struct tomoyo_path_info *filename,
+ const unsigned long number)
+{
+ char buffer[64];
+ int error;
+ u8 radix;
+
+ if (!filename)
+ return 0;
+ switch (type) {
+ case TOMOYO_TYPE_CREATE:
+ case TOMOYO_TYPE_MKDIR:
+ case TOMOYO_TYPE_MKFIFO:
+ case TOMOYO_TYPE_MKSOCK:
+ case TOMOYO_TYPE_CHMOD:
+ radix = TOMOYO_VALUE_TYPE_OCTAL;
+ break;
+ case TOMOYO_TYPE_IOCTL:
+ radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
+ break;
+ default:
+ radix = TOMOYO_VALUE_TYPE_DECIMAL;
+ break;
+ }
+ tomoyo_print_ulong(buffer, sizeof(buffer), number, radix);
+ error = tomoyo_path_number_acl(r, type, filename, number);
+ if (!error)
+ return 0;
+ tomoyo_warn_log(r, "%s %s %s", tomoyo_path_number2keyword(type),
+ filename->name, buffer);
+ if (tomoyo_domain_quota_is_ok(r))
+ tomoyo_update_path_number_acl(type,
+ tomoyo_get_file_pattern(filename)
+ ->name, buffer, r->domain, false);
+ if (r->mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
+ *
+ * @type: Type of operation.
+ * @path: Pointer to "struct path".
+ * @number: Number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_path_number_perm(const u8 type, struct path *path,
+ unsigned long number)
+{
+ struct tomoyo_request_info r;
+ int error = -ENOMEM;
+ struct tomoyo_path_info *buf;
+ int idx;
+
+ if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED ||
+ !path->mnt || !path->dentry)
+ return 0;
+ idx = tomoyo_read_lock();
+ buf = tomoyo_get_path(path);
+ if (!buf)
+ goto out;
+ if (type == TOMOYO_TYPE_MKDIR && !buf->is_dir) {
+ /*
+ * tomoyo_get_path() reserves space for appending "/."
+ */
+ strcat((char *) buf->name, "/");
+ tomoyo_fill_path_info(buf);
+ }
+ error = tomoyo_path_number_perm2(&r, type, buf, number);
+ out:
+ kfree(buf);
+ tomoyo_read_unlock(idx);
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ return error;
+}
+
/**
* tomoyo_check_exec_perm - Check permission for "execute".
*
int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain,
const struct tomoyo_path_info *filename)
{
- const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+ struct tomoyo_request_info r;
- if (!mode)
+ if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED)
return 0;
- return tomoyo_check_file_perm2(domain, filename, 1, "do_execve", mode);
+ return tomoyo_file_perm(&r, filename, 1);
}
/**
const u8 acc_mode = ACC_MODE(flag);
int error = -ENOMEM;
struct tomoyo_path_info *buf;
- const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
- const bool is_enforce = (mode == 3);
+ struct tomoyo_request_info r;
int idx;
- if (!mode || !path->mnt)
+ if (tomoyo_init_request_info(&r, domain) == TOMOYO_CONFIG_DISABLED ||
+ !path->mnt)
return 0;
if (acc_mode == 0)
return 0;
if ((acc_mode & MAY_WRITE) &&
((flag & O_TRUNC) || !(flag & O_APPEND)) &&
(tomoyo_is_no_rewrite_file(buf))) {
- error = tomoyo_path_permission2(domain, TOMOYO_TYPE_REWRITE,
- buf, mode);
+ error = tomoyo_path_permission(&r, TOMOYO_TYPE_REWRITE, buf);
}
if (!error)
- error = tomoyo_check_file_perm2(domain, buf, acc_mode, "open",
- mode);
+ error = tomoyo_file_perm(&r, buf, acc_mode);
if (!error && (flag & O_TRUNC))
- error = tomoyo_path_permission2(domain, TOMOYO_TYPE_TRUNCATE,
- buf, mode);
+ error = tomoyo_path_permission(&r, TOMOYO_TYPE_TRUNCATE, buf);
out:
kfree(buf);
tomoyo_read_unlock(idx);
- if (!is_enforce)
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
error = 0;
return error;
}
/**
- * tomoyo_path_perm - Check permission for "create", "unlink", "mkdir", "rmdir", "mkfifo", "mksock", "mkblock", "mkchar", "truncate", "symlink", "ioctl", "chmod", "chown", "chgrp", "chroot", "mount" and "unmount".
+ * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot", "mount" and "unmount".
*
* @operation: Type of operation.
* @path: Pointer to "struct path".
{
int error = -ENOMEM;
struct tomoyo_path_info *buf;
- struct tomoyo_domain_info *domain = tomoyo_domain();
- const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
- const bool is_enforce = (mode == 3);
+ struct tomoyo_request_info r;
int idx;
- if (!mode || !path->mnt)
+ if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED ||
+ !path->mnt)
return 0;
idx = tomoyo_read_lock();
buf = tomoyo_get_path(path);
if (!buf)
goto out;
switch (operation) {
- case TOMOYO_TYPE_MKDIR:
+ case TOMOYO_TYPE_REWRITE:
+ if (!tomoyo_is_no_rewrite_file(buf)) {
+ error = 0;
+ goto out;
+ }
+ break;
case TOMOYO_TYPE_RMDIR:
case TOMOYO_TYPE_CHROOT:
if (!buf->is_dir) {
tomoyo_fill_path_info(buf);
}
}
- error = tomoyo_path_permission2(domain, operation, buf, mode);
+ error = tomoyo_path_permission(&r, operation, buf);
out:
kfree(buf);
tomoyo_read_unlock(idx);
- if (!is_enforce)
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
error = 0;
return error;
}
/**
- * tomoyo_check_rewrite_permission - Check permission for "rewrite".
+ * tomoyo_path_number3_perm2 - Check permission for path/number/number/number operation.
*
- * @filp: Pointer to "struct file".
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @operation: Type of operation.
+ * @filename: Filename to check.
+ * @mode: Create mode.
+ * @dev: Device number.
*
* Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
*/
-int tomoyo_check_rewrite_permission(struct file *filp)
+static int tomoyo_path_number3_perm2(struct tomoyo_request_info *r,
+ const u8 operation,
+ const struct tomoyo_path_info *filename,
+ const unsigned int mode,
+ const unsigned int dev)
{
+ int error;
+ const unsigned int major = MAJOR(dev);
+ const unsigned int minor = MINOR(dev);
+
+ error = tomoyo_path_number3_acl(r, filename, 1 << operation, mode,
+ major, minor);
+ if (!error)
+ return 0;
+ tomoyo_warn_log(r, "%s %s 0%o %u %u",
+ tomoyo_path_number32keyword(operation),
+ filename->name, mode, major, minor);
+ if (tomoyo_domain_quota_is_ok(r)) {
+ char mode_buf[64];
+ char major_buf[64];
+ char minor_buf[64];
+ memset(mode_buf, 0, sizeof(mode_buf));
+ memset(major_buf, 0, sizeof(major_buf));
+ memset(minor_buf, 0, sizeof(minor_buf));
+ snprintf(mode_buf, sizeof(mode_buf) - 1, "0%o", mode);
+ snprintf(major_buf, sizeof(major_buf) - 1, "%u", major);
+ snprintf(minor_buf, sizeof(minor_buf) - 1, "%u", minor);
+ tomoyo_update_path_number3_acl(operation,
+ tomoyo_get_file_pattern(filename)
+ ->name, mode_buf, major_buf,
+ minor_buf, r->domain, false);
+ }
+ if (r->mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_path_number3_perm - Check permission for "mkblock" and "mkchar".
+ *
+ * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
+ * @path: Pointer to "struct path".
+ * @mode: Create mode.
+ * @dev: Device number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_path_number3_perm(const u8 operation, struct path *path,
+ const unsigned int mode, unsigned int dev)
+{
+ struct tomoyo_request_info r;
int error = -ENOMEM;
- struct tomoyo_domain_info *domain = tomoyo_domain();
- const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
- const bool is_enforce = (mode == 3);
struct tomoyo_path_info *buf;
int idx;
- if (!mode || !filp->f_path.mnt)
+ if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED ||
+ !path->mnt)
return 0;
-
idx = tomoyo_read_lock();
- buf = tomoyo_get_path(&filp->f_path);
- if (!buf)
- goto out;
- if (!tomoyo_is_no_rewrite_file(buf)) {
- error = 0;
- goto out;
+ error = -ENOMEM;
+ buf = tomoyo_get_path(path);
+ if (buf) {
+ error = tomoyo_path_number3_perm2(&r, operation, buf, mode,
+ new_decode_dev(dev));
+ kfree(buf);
}
- error = tomoyo_path_permission2(domain, TOMOYO_TYPE_REWRITE, buf, mode);
- out:
- kfree(buf);
tomoyo_read_unlock(idx);
- if (!is_enforce)
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
error = 0;
return error;
}
struct path *path2)
{
int error = -ENOMEM;
- struct tomoyo_path_info *buf1, *buf2;
- struct tomoyo_domain_info *domain = tomoyo_domain();
- const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
- const bool is_enforce = (mode == 3);
- const char *msg;
+ struct tomoyo_path_info *buf1;
+ struct tomoyo_path_info *buf2;
+ struct tomoyo_request_info r;
int idx;
- if (!mode || !path1->mnt || !path2->mnt)
+ if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED ||
+ !path1->mnt || !path2->mnt)
return 0;
idx = tomoyo_read_lock();
buf1 = tomoyo_get_path(path1);
}
}
}
- error = tomoyo_path2_acl(domain, operation, buf1, buf2);
- msg = tomoyo_path22keyword(operation);
+ error = tomoyo_path2_acl(&r, operation, buf1, buf2);
if (!error)
goto out;
- if (tomoyo_verbose_mode(domain))
- printk(KERN_WARNING "TOMOYO-%s: Access '%s %s %s' "
- "denied for %s\n", tomoyo_get_msg(is_enforce),
- msg, buf1->name, buf2->name,
- tomoyo_get_last_name(domain));
- if (mode == 1 && tomoyo_domain_quota_is_ok(domain)) {
+ tomoyo_warn_log(&r, "%s %s %s", tomoyo_path22keyword(operation),
+ buf1->name, buf2->name);
+ if (tomoyo_domain_quota_is_ok(&r)) {
const char *name1 = tomoyo_get_file_pattern(buf1)->name;
const char *name2 = tomoyo_get_file_pattern(buf2)->name;
- tomoyo_update_path2_acl(operation, name1, name2, domain,
+ tomoyo_update_path2_acl(operation, name1, name2, r.domain,
false);
}
out:
kfree(buf1);
kfree(buf2);
tomoyo_read_unlock(idx);
- if (!is_enforce)
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
error = 0;
return error;
}
+
+/**
+ * tomoyo_write_file_policy - Update file related list.
+ *
+ * @data: String to parse.
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
+ const bool is_delete)
+{
+ char *w[5];
+ u8 type;
+ if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
+ return -EINVAL;
+ if (strncmp(w[0], "allow_", 6)) {
+ unsigned int perm;
+ if (sscanf(w[0], "%u", &perm) == 1)
+ return tomoyo_update_file_acl((u8) perm, w[1], domain,
+ is_delete);
+ goto out;
+ }
+ w[0] += 6;
+ for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
+ if (strcmp(w[0], tomoyo_path_keyword[type]))
+ continue;
+ return tomoyo_update_path_acl(type, w[1], domain, is_delete);
+ }
+ if (!w[2][0])
+ goto out;
+ for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
+ if (strcmp(w[0], tomoyo_path2_keyword[type]))
+ continue;
+ return tomoyo_update_path2_acl(type, w[1], w[2], domain,
+ is_delete);
+ }
+ for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) {
+ if (strcmp(w[0], tomoyo_path_number_keyword[type]))
+ continue;
+ return tomoyo_update_path_number_acl(type, w[1], w[2], domain,
+ is_delete);
+ }
+ if (!w[3][0] || !w[4][0])
+ goto out;
+ for (type = 0; type < TOMOYO_MAX_PATH_NUMBER3_OPERATION; type++) {
+ if (strcmp(w[0], tomoyo_path_number3_keyword[type]))
+ continue;
+ return tomoyo_update_path_number3_acl(type, w[1], w[2], w[3],
+ w[4], domain, is_delete);
+ }
+ out:
+ return -EINVAL;
+}
projects / deliverable / linux.git / blobdiff