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-rw-r--r--security/Kconfig1
-rw-r--r--security/Makefile2
-rw-r--r--security/inode.c347
-rw-r--r--security/keys/internal.h26
-rw-r--r--security/keys/key.c81
-rw-r--r--security/keys/keyctl.c301
-rw-r--r--security/keys/keyring.c86
-rw-r--r--security/keys/proc.c2
-rw-r--r--security/keys/process_keys.c164
-rw-r--r--security/keys/request_key.c36
-rw-r--r--security/keys/request_key_auth.c2
-rw-r--r--security/seclvl.c237
-rw-r--r--security/selinux/avc.c4
-rw-r--r--security/selinux/hooks.c32
-rw-r--r--security/selinux/ss/services.c4
15 files changed, 841 insertions, 484 deletions
diff --git a/security/Kconfig b/security/Kconfig
index dcf04a09185..64d3f1e9ca8 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -35,6 +35,7 @@ config KEYS_DEBUG_PROC_KEYS
config SECURITY
bool "Enable different security models"
+ depends on SYSFS
help
This allows you to choose different security modules to be
configured into your kernel.
diff --git a/security/Makefile b/security/Makefile
index 197cc2f3f1e..8cbbf2f3670 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -11,7 +11,7 @@ obj-y += commoncap.o
endif
# Object file lists
-obj-$(CONFIG_SECURITY) += security.o dummy.o
+obj-$(CONFIG_SECURITY) += security.o dummy.o inode.o
# Must precede capability.o in order to stack properly.
obj-$(CONFIG_SECURITY_SELINUX) += selinux/built-in.o
obj-$(CONFIG_SECURITY_CAPABILITIES) += commoncap.o capability.o
diff --git a/security/inode.c b/security/inode.c
new file mode 100644
index 00000000000..a5964502ae3
--- /dev/null
+++ b/security/inode.c
@@ -0,0 +1,347 @@
+/*
+ * inode.c - securityfs
+ *
+ * Copyright (C) 2005 Greg Kroah-Hartman <gregkh@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * Based on fs/debugfs/inode.c which had the following copyright notice:
+ * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004 IBM Inc.
+ */
+
+/* #define DEBUG */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/pagemap.h>
+#include <linux/init.h>
+#include <linux/namei.h>
+#include <linux/security.h>
+
+#define SECURITYFS_MAGIC 0x73636673
+
+static struct vfsmount *mount;
+static int mount_count;
+
+/*
+ * TODO:
+ * I think I can get rid of these default_file_ops, but not quite sure...
+ */
+static ssize_t default_read_file(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return 0;
+}
+
+static ssize_t default_write_file(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return count;
+}
+
+static int default_open(struct inode *inode, struct file *file)
+{
+ if (inode->u.generic_ip)
+ file->private_data = inode->u.generic_ip;
+
+ return 0;
+}
+
+static struct file_operations default_file_ops = {
+ .read = default_read_file,
+ .write = default_write_file,
+ .open = default_open,
+};
+
+static struct inode *get_inode(struct super_block *sb, int mode, dev_t dev)
+{
+ struct inode *inode = new_inode(sb);
+
+ if (inode) {
+ inode->i_mode = mode;
+ inode->i_uid = 0;
+ inode->i_gid = 0;
+ inode->i_blksize = PAGE_CACHE_SIZE;
+ inode->i_blocks = 0;
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ switch (mode & S_IFMT) {
+ default:
+ init_special_inode(inode, mode, dev);
+ break;
+ case S_IFREG:
+ inode->i_fop = &default_file_ops;
+ break;
+ case S_IFDIR:
+ inode->i_op = &simple_dir_inode_operations;
+ inode->i_fop = &simple_dir_operations;
+
+ /* directory inodes start off with i_nlink == 2 (for "." entry) */
+ inode->i_nlink++;
+ break;
+ }
+ }
+ return inode;
+}
+
+/* SMP-safe */
+static int mknod(struct inode *dir, struct dentry *dentry,
+ int mode, dev_t dev)
+{
+ struct inode *inode;
+ int error = -EPERM;
+
+ if (dentry->d_inode)
+ return -EEXIST;
+
+ inode = get_inode(dir->i_sb, mode, dev);
+ if (inode) {
+ d_instantiate(dentry, inode);
+ dget(dentry);
+ error = 0;
+ }
+ return error;
+}
+
+static int mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ int res;
+
+ mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
+ res = mknod(dir, dentry, mode, 0);
+ if (!res)
+ dir->i_nlink++;
+ return res;
+}
+
+static int create(struct inode *dir, struct dentry *dentry, int mode)
+{
+ mode = (mode & S_IALLUGO) | S_IFREG;
+ return mknod(dir, dentry, mode, 0);
+}
+
+static inline int positive(struct dentry *dentry)
+{
+ return dentry->d_inode && !d_unhashed(dentry);
+}
+
+static int fill_super(struct super_block *sb, void *data, int silent)
+{
+ static struct tree_descr files[] = {{""}};
+
+ return simple_fill_super(sb, SECURITYFS_MAGIC, files);
+}
+
+static struct super_block *get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data)
+{
+ return get_sb_single(fs_type, flags, data, fill_super);
+}
+
+static struct file_system_type fs_type = {
+ .owner = THIS_MODULE,
+ .name = "securityfs",
+ .get_sb = get_sb,
+ .kill_sb = kill_litter_super,
+};
+
+static int create_by_name(const char *name, mode_t mode,
+ struct dentry *parent,
+ struct dentry **dentry)
+{
+ int error = 0;
+
+ *dentry = NULL;
+
+ /* If the parent is not specified, we create it in the root.
+ * We need the root dentry to do this, which is in the super
+ * block. A pointer to that is in the struct vfsmount that we
+ * have around.
+ */
+ if (!parent ) {
+ if (mount && mount->mnt_sb) {
+ parent = mount->mnt_sb->s_root;
+ }
+ }
+ if (!parent) {
+ pr_debug("securityfs: Ah! can not find a parent!\n");
+ return -EFAULT;
+ }
+
+ down(&parent->d_inode->i_sem);
+ *dentry = lookup_one_len(name, parent, strlen(name));
+ if (!IS_ERR(dentry)) {
+ if ((mode & S_IFMT) == S_IFDIR)
+ error = mkdir(parent->d_inode, *dentry, mode);
+ else
+ error = create(parent->d_inode, *dentry, mode);
+ } else
+ error = PTR_ERR(dentry);
+ up(&parent->d_inode->i_sem);
+
+ return error;
+}
+
+/**
+ * securityfs_create_file - create a file in the securityfs filesystem
+ *
+ * @name: a pointer to a string containing the name of the file to create.
+ * @mode: the permission that the file should have
+ * @parent: a pointer to the parent dentry for this file. This should be a
+ * directory dentry if set. If this paramater is NULL, then the
+ * file will be created in the root of the securityfs filesystem.
+ * @data: a pointer to something that the caller will want to get to later
+ * on. The inode.u.generic_ip pointer will point to this value on
+ * the open() call.
+ * @fops: a pointer to a struct file_operations that should be used for
+ * this file.
+ *
+ * This is the basic "create a file" function for securityfs. It allows for a
+ * wide range of flexibility in createing a file, or a directory (if you
+ * want to create a directory, the securityfs_create_dir() function is
+ * recommended to be used instead.)
+ *
+ * This function will return a pointer to a dentry if it succeeds. This
+ * pointer must be passed to the securityfs_remove() function when the file is
+ * to be removed (no automatic cleanup happens if your module is unloaded,
+ * you are responsible here.) If an error occurs, NULL will be returned.
+ *
+ * If securityfs is not enabled in the kernel, the value -ENODEV will be
+ * returned. It is not wise to check for this value, but rather, check for
+ * NULL or !NULL instead as to eliminate the need for #ifdef in the calling
+ * code.
+ */
+struct dentry *securityfs_create_file(const char *name, mode_t mode,
+ struct dentry *parent, void *data,
+ struct file_operations *fops)
+{
+ struct dentry *dentry = NULL;
+ int error;
+
+ pr_debug("securityfs: creating file '%s'\n",name);
+
+ error = simple_pin_fs("securityfs", &mount, &mount_count);
+ if (error) {
+ dentry = ERR_PTR(error);
+ goto exit;
+ }
+
+ error = create_by_name(name, mode, parent, &dentry);
+ if (error) {
+ dentry = ERR_PTR(error);
+ simple_release_fs(&mount, &mount_count);
+ goto exit;
+ }
+
+ if (dentry->d_inode) {
+ if (fops)
+ dentry->d_inode->i_fop = fops;
+ if (data)
+ dentry->d_inode->u.generic_ip = data;
+ }
+exit:
+ return dentry;
+}
+EXPORT_SYMBOL_GPL(securityfs_create_file);
+
+/**
+ * securityfs_create_dir - create a directory in the securityfs filesystem
+ *
+ * @name: a pointer to a string containing the name of the directory to
+ * create.
+ * @parent: a pointer to the parent dentry for this file. This should be a
+ * directory dentry if set. If this paramater is NULL, then the
+ * directory will be created in the root of the securityfs filesystem.
+ *
+ * This function creates a directory in securityfs with the given name.
+ *
+ * This function will return a pointer to a dentry if it succeeds. This
+ * pointer must be passed to the securityfs_remove() function when the file is
+ * to be removed (no automatic cleanup happens if your module is unloaded,
+ * you are responsible here.) If an error occurs, NULL will be returned.
+ *
+ * If securityfs is not enabled in the kernel, the value -ENODEV will be
+ * returned. It is not wise to check for this value, but rather, check for
+ * NULL or !NULL instead as to eliminate the need for #ifdef in the calling
+ * code.
+ */
+struct dentry *securityfs_create_dir(const char *name, struct dentry *parent)
+{
+ return securityfs_create_file(name,
+ S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
+ parent, NULL, NULL);
+}
+EXPORT_SYMBOL_GPL(securityfs_create_dir);
+
+/**
+ * securityfs_remove - removes a file or directory from the securityfs filesystem
+ *
+ * @dentry: a pointer to a the dentry of the file or directory to be
+ * removed.
+ *
+ * This function removes a file or directory in securityfs that was previously
+ * created with a call to another securityfs function (like
+ * securityfs_create_file() or variants thereof.)
+ *
+ * This function is required to be called in order for the file to be
+ * removed, no automatic cleanup of files will happen when a module is
+ * removed, you are responsible here.
+ */
+void securityfs_remove(struct dentry *dentry)
+{
+ struct dentry *parent;
+
+ if (!dentry)
+ return;
+
+ parent = dentry->d_parent;
+ if (!parent || !parent->d_inode)
+ return;
+
+ down(&parent->d_inode->i_sem);
+ if (positive(dentry)) {
+ if (dentry->d_inode) {
+ if (S_ISDIR(dentry->d_inode->i_mode))
+ simple_rmdir(parent->d_inode, dentry);
+ else
+ simple_unlink(parent->d_inode, dentry);
+ dput(dentry);
+ }
+ }
+ up(&parent->d_inode->i_sem);
+ simple_release_fs(&mount, &mount_count);
+}
+EXPORT_SYMBOL_GPL(securityfs_remove);
+
+static decl_subsys(security, NULL, NULL);
+
+static int __init securityfs_init(void)
+{
+ int retval;
+
+ kset_set_kset_s(&security_subsys, kernel_subsys);
+ retval = subsystem_register(&security_subsys);
+ if (retval)
+ return retval;
+
+ retval = register_filesystem(&fs_type);
+ if (retval)
+ subsystem_unregister(&security_subsys);
+ return retval;
+}
+
+static void __exit securityfs_exit(void)
+{
+ simple_release_fs(&mount, &mount_count);
+ unregister_filesystem(&fs_type);
+ subsystem_unregister(&security_subsys);
+}
+
+core_initcall(securityfs_init);
+module_exit(securityfs_exit);
+MODULE_LICENSE("GPL");
+
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 46c8602661c..db99ed434f3 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -71,26 +71,26 @@ extern void keyring_publish_name(struct key *keyring);
extern int __key_link(struct key *keyring, struct key *key);
-extern struct key *__keyring_search_one(struct key *keyring,
- const struct key_type *type,
- const char *description,
- key_perm_t perm);
+extern key_ref_t __keyring_search_one(key_ref_t keyring_ref,
+ const struct key_type *type,
+ const char *description,
+ key_perm_t perm);
extern struct key *keyring_search_instkey(struct key *keyring,
key_serial_t target_id);
typedef int (*key_match_func_t)(const struct key *, const void *);
-extern struct key *keyring_search_aux(struct key *keyring,
- struct task_struct *tsk,
- struct key_type *type,
- const void *description,
- key_match_func_t match);
+extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
+ struct task_struct *tsk,
+ struct key_type *type,
+ const void *description,
+ key_match_func_t match);
-extern struct key *search_process_keyrings(struct key_type *type,
- const void *description,
- key_match_func_t match,
- struct task_struct *tsk);
+extern key_ref_t search_process_keyrings(struct key_type *type,
+ const void *description,
+ key_match_func_t match,
+ struct task_struct *tsk);
extern struct key *find_keyring_by_name(const char *name, key_serial_t bound);
diff --git a/security/keys/key.c b/security/keys/key.c
index fb89f984446..2182be9e930 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -693,14 +693,15 @@ void key_type_put(struct key_type *ktype)
* - the key has an incremented refcount
* - we need to put the key if we get an error
*/
-static inline struct key *__key_update(struct key *key, const void *payload,
- size_t plen)
+static inline key_ref_t __key_update(key_ref_t key_ref,
+ const void *payload, size_t plen)
{
+ struct key *key = key_ref_to_ptr(key_ref);
int ret;
/* need write permission on the key to update it */
ret = -EACCES;
- if (!key_permission(key, KEY_WRITE))
+ if (!key_permission(key_ref, KEY_WRITE))
goto error;
ret = -EEXIST;
@@ -719,12 +720,12 @@ static inline struct key *__key_update(struct key *key, const void *payload,
if (ret < 0)
goto error;
- out:
- return key;
+out:
+ return key_ref;
- error:
+error:
key_put(key);
- key = ERR_PTR(ret);
+ key_ref = ERR_PTR(ret);
goto out;
} /* end __key_update() */
@@ -734,52 +735,56 @@ static inline struct key *__key_update(struct key *key, const void *payload,
* search the specified keyring for a key of the same description; if one is
* found, update it, otherwise add a new one
*/
-struct key *key_create_or_update(struct key *keyring,
- const char *type,
- const char *description,
- const void *payload,
- size_t plen,
- int not_in_quota)
+key_ref_t key_create_or_update(key_ref_t keyring_ref,
+ const char *type,
+ const char *description,
+ const void *payload,
+ size_t plen,
+ int not_in_quota)
{
struct key_type *ktype;
- struct key *key = NULL;
+ struct key *keyring, *key = NULL;
key_perm_t perm;
+ key_ref_t key_ref;
int ret;
- key_check(keyring);
-
/* look up the key type to see if it's one of the registered kernel
* types */
ktype = key_type_lookup(type);
if (IS_ERR(ktype)) {
- key = ERR_PTR(-ENODEV);
+ key_ref = ERR_PTR(-ENODEV);
goto error;
}
- ret = -EINVAL;
+ key_ref = ERR_PTR(-EINVAL);
if (!ktype->match || !ktype->instantiate)
goto error_2;
+ keyring = key_ref_to_ptr(keyring_ref);
+
+ key_check(keyring);
+
+ down_write(&keyring->sem);
+
+ /* if we're going to allocate a new key, we're going to have
+ * to modify the keyring */
+ key_ref = ERR_PTR(-EACCES);
+ if (!key_permission(keyring_ref, KEY_WRITE))
+ goto error_3;
+
/* search for an existing key of the same type and description in the
* destination keyring
*/
- down_write(&keyring->sem);
-
- key = __keyring_search_one(keyring, ktype, description, 0);
- if (!IS_ERR(key))
+ key_ref = __keyring_search_one(keyring_ref, ktype, description, 0);
+ if (!IS_ERR(key_ref))
goto found_matching_key;
- /* if we're going to allocate a new key, we're going to have to modify
- * the keyring */
- ret = -EACCES;
- if (!key_permission(keyring, KEY_WRITE))
- goto error_3;
-
/* decide on the permissions we want */
- perm = KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_LINK;
+ perm = KEY_POS_VIEW | KEY_POS_SEARCH | KEY_POS_LINK;
+ perm |= KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_LINK;
if (ktype->read)
- perm |= KEY_USR_READ;
+ perm |= KEY_POS_READ | KEY_USR_READ;
if (ktype == &key_type_keyring || ktype->update)
perm |= KEY_USR_WRITE;
@@ -788,7 +793,7 @@ struct key *key_create_or_update(struct key *keyring,
key = key_alloc(ktype, description, current->fsuid, current->fsgid,
perm, not_in_quota);
if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = ERR_PTR(PTR_ERR(key));
goto error_3;
}
@@ -796,15 +801,18 @@ struct key *key_create_or_update(struct key *keyring,
ret = __key_instantiate_and_link(key, payload, plen, keyring, NULL);
if (ret < 0) {
key_put(key);
- key = ERR_PTR(ret);
+ key_ref = ERR_PTR(ret);
+ goto error_3;
}
+ key_ref = make_key_ref(key, is_key_possessed(keyring_ref));
+
error_3:
up_write(&keyring->sem);
error_2:
key_type_put(ktype);
error:
- return key;
+ return key_ref;
found_matching_key:
/* we found a matching key, so we're going to try to update it
@@ -813,7 +821,7 @@ struct key *key_create_or_update(struct key *keyring,
up_write(&keyring->sem);
key_type_put(ktype);
- key = __key_update(key, payload, plen);
+ key_ref = __key_update(key_ref, payload, plen);
goto error;
} /* end key_create_or_update() */
@@ -824,15 +832,16 @@ EXPORT_SYMBOL(key_create_or_update);
/*
* update a key
*/
-int key_update(struct key *key, const void *payload, size_t plen)
+int key_update(key_ref_t key_ref, const void *payload, size_t plen)
{
+ struct key *key = key_ref_to_ptr(key_ref);
int ret;
key_check(key);
/* the key must be writable */
ret = -EACCES;
- if (!key_permission(key, KEY_WRITE))
+ if (!key_permission(key_ref, KEY_WRITE))
goto error;
/* attempt to update it if supported */
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index a6516a64b29..4c670ee6acf 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -34,7 +34,7 @@ asmlinkage long sys_add_key(const char __user *_type,
size_t plen,
key_serial_t ringid)
{
- struct key *keyring, *key;
+ key_ref_t keyring_ref, key_ref;
char type[32], *description;
void *payload;
long dlen, ret;
@@ -86,25 +86,25 @@ asmlinkage long sys_add_key(const char __user *_type,
}
/* find the target keyring (which must be writable) */
- keyring = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
- if (IS_ERR(keyring)) {
- ret = PTR_ERR(keyring);
+ keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+ if (IS_ERR(keyring_ref)) {
+ ret = PTR_ERR(keyring_ref);
goto error3;
}
/* create or update the requested key and add it to the target
* keyring */
- key = key_create_or_update(keyring, type, description,
- payload, plen, 0);
- if (!IS_ERR(key)) {
- ret = key->serial;
- key_put(key);
+ key_ref = key_create_or_update(keyring_ref, type, description,
+ payload, plen, 0);
+ if (!IS_ERR(key_ref)) {
+ ret = key_ref_to_ptr(key_ref)->serial;
+ key_ref_put(key_ref);
}
else {
- ret = PTR_ERR(key);
+ ret = PTR_ERR(key_ref);
}
- key_put(keyring);
+ key_ref_put(keyring_ref);
error3:
kfree(payload);
error2:
@@ -131,7 +131,8 @@ asmlinkage long sys_request_key(const char __user *_type,
key_serial_t destringid)
{
struct key_type *ktype;
- struct key *key, *dest;
+ struct key *key;
+ key_ref_t dest_ref;
char type[32], *description, *callout_info;
long dlen, ret;
@@ -187,11 +188,11 @@ asmlinkage long sys_request_key(const char __user *_type,
}
/* get the destination keyring if specified */
- dest = NULL;
+ dest_ref = NULL;
if (destringid) {
- dest = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
- if (IS_ERR(dest)) {
- ret = PTR_ERR(dest);
+ dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
+ if (IS_ERR(dest_ref)) {
+ ret = PTR_ERR(dest_ref);
goto error3;
}
}
@@ -204,7 +205,8 @@ asmlinkage long sys_request_key(const char __user *_type,
}
/* do the search */
- key = request_key_and_link(ktype, description, callout_info, dest);
+ key = request_key_and_link(ktype, description, callout_info,
+ key_ref_to_ptr(dest_ref));
if (IS_ERR(key)) {
ret = PTR_ERR(key);
goto error5;
@@ -216,7 +218,7 @@ asmlinkage long sys_request_key(const char __user *_type,
error5:
key_type_put(ktype);
error4:
- key_put(dest);
+ key_ref_put(dest_ref);
error3:
kfree(callout_info);
error2:
@@ -234,17 +236,17 @@ asmlinkage long sys_request_key(const char __user *_type,
*/
long keyctl_get_keyring_ID(key_serial_t id, int create)
{
- struct key *key;
+ key_ref_t key_ref;
long ret;
- key = lookup_user_key(NULL, id, create, 0, KEY_SEARCH);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = lookup_user_key(NULL, id, create, 0, KEY_SEARCH);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
goto error;
}
- ret = key->serial;
- key_put(key);
+ ret = key_ref_to_ptr(key_ref)->serial;
+ key_ref_put(key_ref);
error:
return ret;
@@ -302,7 +304,7 @@ long keyctl_update_key(key_serial_t id,
const void __user *_payload,
size_t plen)
{
- struct key *key;
+ key_ref_t key_ref;
void *payload;
long ret;
@@ -324,16 +326,16 @@ long keyctl_update_key(key_serial_t id,
}
/* find the target key (which must be writable) */
- key = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
goto error2;
}
/* update the key */
- ret = key_update(key, payload, plen);
+ ret = key_update(key_ref, payload, plen);
- key_put(key);
+ key_ref_put(key_ref);
error2:
kfree(payload);
error:
@@ -349,19 +351,19 @@ long keyctl_update_key(key_serial_t id,
*/
long keyctl_revoke_key(key_serial_t id)
{
- struct key *key;
+ key_ref_t key_ref;
long ret;
- key = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
goto error;
}
- key_revoke(key);
+ key_revoke(key_ref_to_ptr(key_ref));
ret = 0;
- key_put(key);
+ key_ref_put(key_ref);
error:
return ret;
@@ -375,18 +377,18 @@ long keyctl_revoke_key(key_serial_t id)
*/
long keyctl_keyring_clear(key_serial_t ringid)
{
- struct key *keyring;
+ key_ref_t keyring_ref;
long ret;
- keyring = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
- if (IS_ERR(keyring)) {
- ret = PTR_ERR(keyring);
+ keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+ if (IS_ERR(keyring_ref)) {
+ ret = PTR_ERR(keyring_ref);
goto error;
}
- ret = keyring_clear(keyring);
+ ret = keyring_clear(key_ref_to_ptr(keyring_ref));
- key_put(keyring);
+ key_ref_put(keyring_ref);
error:
return ret;
@@ -401,26 +403,26 @@ long keyctl_keyring_clear(key_serial_t ringid)
*/
long keyctl_keyring_link(key_serial_t id, key_serial_t ringid)
{
- struct key *keyring, *key;
+ key_ref_t keyring_ref, key_ref;
long ret;
- keyring = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
- if (IS_ERR(keyring)) {
- ret = PTR_ERR(keyring);
+ keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+ if (IS_ERR(keyring_ref)) {
+ ret = PTR_ERR(keyring_ref);
goto error;
}
- key = lookup_user_key(NULL, id, 1, 0, KEY_LINK);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = lookup_user_key(NULL, id, 1, 0, KEY_LINK);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
goto error2;
}
- ret = key_link(keyring, key);
+ ret = key_link(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref));
- key_put(key);
+ key_ref_put(key_ref);
error2:
- key_put(keyring);
+ key_ref_put(keyring_ref);
error:
return ret;
@@ -435,26 +437,26 @@ long keyctl_keyring_link(key_serial_t id, key_serial_t ringid)
*/
long keyctl_keyring_unlink(key_serial_t id, key_serial_t ringid)
{
- struct key *keyring, *key;
+ key_ref_t keyring_ref, key_ref;
long ret;
- keyring = lookup_user_key(NULL, ringid, 0, 0, KEY_WRITE);
- if (IS_ERR(keyring)) {
- ret = PTR_ERR(keyring);
+ keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_WRITE);
+ if (IS_ERR(keyring_ref)) {
+ ret = PTR_ERR(keyring_ref);
goto error;
}
- key = lookup_user_key(NULL, id, 0, 0, 0);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = lookup_user_key(NULL, id, 0, 0, 0);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
goto error2;
}
- ret = key_unlink(keyring, key);
+ ret = key_unlink(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref));
- key_put(key);
+ key_ref_put(key_ref);
error2:
- key_put(keyring);
+ key_ref_put(keyring_ref);
error:
return ret;
@@ -476,24 +478,26 @@ long keyctl_describe_key(key_serial_t keyid,
size_t buflen)
{
struct key *key, *instkey;
+ key_ref_t key_ref;
char *tmpbuf;
long ret;
- key = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
- if (IS_ERR(key)) {
+ key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
+ if (IS_ERR(key_ref)) {
/* viewing a key under construction is permitted if we have the
* authorisation token handy */
- if (PTR_ERR(key) == -EACCES) {
+ if (PTR_ERR(key_ref) == -EACCES) {
instkey = key_get_instantiation_authkey(keyid);
if (!IS_ERR(instkey)) {
key_put(instkey);
- key = lookup_user_key(NULL, keyid, 0, 1, 0);
- if (!IS_ERR(key))
+ key_ref = lookup_user_key(NULL, keyid,
+ 0, 1, 0);
+ if (!IS_ERR(key_ref))
goto okay;
}
}
- ret = PTR_ERR(key);
+ ret = PTR_ERR(key_ref);
goto error;
}
@@ -504,13 +508,16 @@ okay:
if (!tmpbuf)
goto error2;
+ key = key_ref_to_ptr(key_ref);
+
ret = snprintf(tmpbuf, PAGE_SIZE - 1,
- "%s;%d;%d;%06x;%s",
- key->type->name,
- key->uid,
- key->gid,
- key->perm,
- key->description ? key->description :""
+ "%s;%d;%d;%08x;%s",
+ key_ref_to_ptr(key_ref)->type->name,
+ key_ref_to_ptr(key_ref)->uid,
+ key_ref_to_ptr(key_ref)->gid,
+ key_ref_to_ptr(key_ref)->perm,
+ key_ref_to_ptr(key_ref)->description ?
+ key_ref_to_ptr(key_ref)->description : ""
);
/* include a NUL char at the end of the data */
@@ -530,7 +537,7 @@ okay:
kfree(tmpbuf);
error2:
- key_put(key);
+ key_ref_put(key_ref);
error:
return ret;
@@ -552,7 +559,7 @@ long keyctl_keyring_search(key_serial_t ringid,
key_serial_t destringid)
{
struct key_type *ktype;
- struct key *keyring, *key, *dest;
+ key_ref_t keyring_ref, key_ref, dest_ref;
char type[32], *description;
long dlen, ret;
@@ -581,18 +588,18 @@ long keyctl_keyring_search(key_serial_t ringid,
goto error2;
/* get the keyring at which to begin the search */
- keyring = lookup_user_key(NULL, ringid, 0, 0, KEY_SEARCH);
- if (IS_ERR(keyring)) {
- ret = PTR_ERR(keyring);
+ keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_SEARCH);
+ if (IS_ERR(keyring_ref)) {
+ ret = PTR_ERR(keyring_ref);
goto error2;
}
/* get the destination keyring if specified */
- dest = NULL;
+ dest_ref = NULL;
if (destringid) {
- dest = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
- if (IS_ERR(dest)) {
- ret = PTR_ERR(dest);
+ dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
+ if (IS_ERR(dest_ref)) {
+ ret = PTR_ERR(dest_ref);
goto error3;
}
}
@@ -605,9 +612,9 @@ long keyctl_keyring_search(key_serial_t ringid,
}
/* do the search */
- key = keyring_search(keyring, ktype, description);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = keyring_search(keyring_ref, ktype, description);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
/* treat lack or presence of a negative key the same */
if (ret == -EAGAIN)
@@ -616,26 +623,26 @@ long keyctl_keyring_search(key_serial_t ringid,
}
/* link the resulting key to the destination keyring if we can */
- if (dest) {
+ if (dest_ref) {
ret = -EACCES;
- if (!key_permission(key, KEY_LINK))
+ if (!key_permission(key_ref, KEY_LINK))
goto error6;
- ret = key_link(dest, key);
+ ret = key_link(key_ref_to_ptr(dest_ref), key_ref_to_ptr(key_ref));
if (ret < 0)
goto error6;
}
- ret = key->serial;
+ ret = key_ref_to_ptr(key_ref)->serial;
error6:
- key_put(key);
+ key_ref_put(key_ref);
error5:
key_type_put(ktype);
error4:
- key_put(dest);
+ key_ref_put(dest_ref);
error3:
- key_put(keyring);
+ key_ref_put(keyring_ref);
error2:
kfree(description);
error:
@@ -645,16 +652,6 @@ long keyctl_keyring_search(key_serial_t ringid,
/*****************************************************************************/
/*
- * see if the key we're looking at is the target key
- */
-static int keyctl_read_key_same(const struct key *key, const void *target)
-{
- return key == target;
-
-} /* end keyctl_read_key_same() */
-
-/*****************************************************************************/
-/*
* read a user key's payload
* - the keyring must be readable or the key must be searchable from the
* process's keyrings
@@ -665,38 +662,33 @@ static int keyctl_read_key_same(const struct key *key, const void *target)
*/
long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen)
{
- struct key *key, *skey;
+ struct key *key;
+ key_ref_t key_ref;
long ret;
/* find the key first */
- key = lookup_user_key(NULL, keyid, 0, 0, 0);
- if (!IS_ERR(key)) {
- /* see if we can read it directly */
- if (key_permission(key, KEY_READ))
- goto can_read_key;
-
- /* we can't; see if it's searchable from this process's
- * keyrings
- * - we automatically take account of the fact that it may be
- * dangling off an instantiation key
- */
- skey = search_process_keyrings(key->type, key,
- keyctl_read_key_same, current);
- if (!IS_ERR(skey))
- goto can_read_key2;
-
- ret = PTR_ERR(skey);
- if (ret == -EAGAIN)
- ret = -EACCES;
- goto error2;
+ key_ref = lookup_user_key(NULL, keyid, 0, 0, 0);
+ if (IS_ERR(key_ref)) {
+ ret = -ENOKEY;
+ goto error;
}
- ret = -ENOKEY;
- goto error;
+ key = key_ref_to_ptr(key_ref);
+
+ /* see if we can read it directly */
+ if (key_permission(key_ref, KEY_READ))
+ goto can_read_key;
+
+ /* we can't; see if it's searchable from this process's keyrings
+ * - we automatically take account of the fact that it may be
+ * dangling off an instantiation key
+ */
+ if (!is_key_possessed(key_ref)) {
+ ret = -EACCES;
+ goto error2;
+ }
/* the key is probably readable - now try to read it */
- can_read_key2:
- key_put(skey);
can_read_key:
ret = key_validate(key);
if (ret == 0) {
@@ -727,18 +719,21 @@ long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen)
long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
{
struct key *key;
+ key_ref_t key_ref;
long ret;
ret = 0;
if (uid == (uid_t) -1 && gid == (gid_t) -1)
goto error;
- key = lookup_user_key(NULL, id, 1, 1, 0);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = lookup_user_key(NULL, id, 1, 1, 0);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
goto error;
}
+ key = key_ref_to_ptr(key_ref);
+
/* make the changes with the locks held to prevent chown/chown races */
ret = -EACCES;
down_write(&key->sem);
@@ -784,18 +779,21 @@ long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
long keyctl_setperm_key(key_serial_t id, key_perm_t perm)
{
struct key *key;
+ key_ref_t key_ref;
long ret;
ret = -EINVAL;
- if (perm & ~(KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL))
+ if (perm & ~(KEY_POS_ALL | KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL))
goto error;
- key = lookup_user_key(NULL, id, 1, 1, 0);
- if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = lookup_user_key(NULL, id, 1, 1, 0);
+ if (IS_ERR(key_ref)) {
+ ret = PTR_ERR(key_ref);
goto error;
}
+ key = key_ref_to_ptr(key_ref);
+
/* make the changes with the locks held to prevent chown/chmod races */
ret = -EACCES;
down_write(&key->sem);
@@ -824,7 +822,8 @@ long keyctl_instantiate_key(key_serial_t id,
key_serial_t ringid)
{
struct request_key_auth *rka;
- struct key *instkey, *keyring;
+ struct key *instkey;
+ key_ref_t keyring_ref;
void *payload;
long ret;
@@ -857,21 +856,21 @@ long keyctl_instantiate_key(key_serial_t id,
/* find the destination keyring amongst those belonging to the
* requesting task */
- keyring = NULL;
+ keyring_ref = NULL;
if (ringid) {
- keyring = lookup_user_key(rka->context, ringid, 1, 0,
- KEY_WRITE);
- if (IS_ERR(keyring)) {
- ret = PTR_ERR(keyring);
+ keyring_ref = lookup_user_key(rka->context, ringid, 1, 0,
+ KEY_WRITE);
+ if (IS_ERR(keyring_ref)) {
+ ret = PTR_ERR(keyring_ref);
goto error3;
}
}
/* instantiate the key and link it into a keyring */
ret = key_instantiate_and_link(rka->target_key, payload, plen,
- keyring, instkey);
+ key_ref_to_ptr(keyring_ref), instkey);
- key_put(keyring);
+ key_ref_put(keyring_ref);
error3:
key_put(instkey);
error2:
@@ -889,7 +888,8 @@ long keyctl_instantiate_key(key_serial_t id,
long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid)
{
struct request_key_auth *rka;
- struct key *instkey, *keyring;
+ struct key *instkey;
+ key_ref_t keyring_ref;
long ret;
/* find the instantiation authorisation key */
@@ -903,19 +903,20 @@ long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid)
/* find the destination keyring if present (which must also be
* writable) */
- keyring = NULL;
+ keyring_ref = NULL;
if (ringid) {
- keyring = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
- if (IS_ERR(keyring)) {
- ret = PTR_ERR(keyring);
+ keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+ if (IS_ERR(keyring_ref)) {
+ ret = PTR_ERR(keyring_ref);
goto error2;
}
}
/* instantiate the key and link it into a keyring */
- ret = key_negate_and_link(rka->target_key, timeout, keyring, instkey);
+ ret = key_negate_and_link(rka->target_key, timeout,
+ key_ref_to_ptr(keyring_ref), instkey);
- key_put(keyring);
+ key_ref_put(keyring_ref);
error2:
key_put(instkey);
error:
diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index 9c208c756df..0639396dd44 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -309,7 +309,7 @@ struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
int ret;
keyring = key_alloc(&key_type_keyring, description,
- uid, gid, KEY_USR_ALL, not_in_quota);
+ uid, gid, KEY_POS_ALL | KEY_USR_ALL, not_in_quota);
if (!IS_ERR(keyring)) {
ret = key_instantiate_and_link(keyring, NULL, 0, dest, NULL);
@@ -333,12 +333,13 @@ struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
* - we rely on RCU to prevent the keyring lists from disappearing on us
* - we return -EAGAIN if we didn't find any matching key
* - we return -ENOKEY if we only found negative matching keys
+ * - we propagate the possession attribute from the keyring ref to the key ref
*/
-struct key *keyring_search_aux(struct key *keyring,
- struct task_struct *context,
- struct key_type *type,
- const void *description,
- key_match_func_t match)
+key_ref_t keyring_search_aux(key_ref_t keyring_ref,
+ struct task_struct *context,
+ struct key_type *type,
+ const void *description,
+ key_match_func_t match)
{
struct {
struct keyring_list *keylist;
@@ -347,29 +348,33 @@ struct key *keyring_search_aux(struct key *keyring,
struct keyring_list *keylist;
struct timespec now;
- struct key *key;
+ unsigned long possessed;
+ struct key *keyring, *key;
+ key_ref_t key_ref;
long err;
int sp, kix;
+ keyring = key_ref_to_ptr(keyring_ref);
+ possessed = is_key_possessed(keyring_ref);
key_check(keyring);
- rcu_read_lock();
-
/* top keyring must have search permission to begin the search */
- key = ERR_PTR(-EACCES);
- if (!key_task_permission(keyring, context, KEY_SEARCH))
+ key_ref = ERR_PTR(-EACCES);
+ if (!key_task_permission(keyring_ref, context, KEY_SEARCH))
goto error;
- key = ERR_PTR(-ENOTDIR);
+ key_ref = ERR_PTR(-ENOTDIR);
if (keyring->type != &key_type_keyring)
goto error;
+ rcu_read_lock();
+
now = current_kernel_time();
err = -EAGAIN;
sp = 0;
/* start processing a new keyring */
- descend:
+descend:
if (test_bit(KEY_FLAG_REVOKED, &keyring->flags))
goto not_this_keyring;
@@ -397,7 +402,8 @@ struct key *keyring_search_aux(struct key *keyring,
continue;
/* key must have search permissions */
- if (!key_task_permission(key, context, KEY_SEARCH))
+ if (!key_task_permission(make_key_ref(key, possessed),
+ context, KEY_SEARCH))
continue;
/* we set a different error code if we find a negative key */
@@ -411,7 +417,7 @@ struct key *keyring_search_aux(struct key *keyring,
/* search through the keyrings nested in this one */
kix = 0;
- ascend:
+ascend:
for (; kix < keylist->nkeys; kix++) {
key = keylist->keys[kix];
if (key->type != &key_type_keyring)
@@ -423,7 +429,8 @@ struct key *keyring_search_aux(struct key *keyring,
if (sp >= KEYRING_SEARCH_MAX_DEPTH)
continue;
- if (!key_task_permission(key, context, KEY_SEARCH))
+ if (!key_task_permission(make_key_ref(key, possessed),
+ context, KEY_SEARCH))
continue;
/* stack the current position */
@@ -438,7 +445,7 @@ struct key *keyring_search_aux(struct key *keyring,
/* the keyring we're looking at was disqualified or didn't contain a
* matching key */
- not_this_keyring:
+not_this_keyring:
if (sp > 0) {
/* resume the processing of a keyring higher up in the tree */
sp--;
@@ -447,16 +454,18 @@ struct key *keyring_search_aux(struct key *keyring,
goto ascend;
}
- key = ERR_PTR(err);
- goto error;
+ key_ref = ERR_PTR(err);
+ goto error_2;
/* we found a viable match */
- found:
+found:
atomic_inc(&key->usage);
key_check(key);
- error:
+ key_ref = make_key_ref(key, possessed);
+error_2:
rcu_read_unlock();
- return key;
+error:
+ return key_ref;
} /* end keyring_search_aux() */
@@ -469,9 +478,9 @@ struct key *keyring_search_aux(struct key *keyring,
* - we return -EAGAIN if we didn't find any matching key
* - we return -ENOKEY if we only found negative matching keys
*/
-struct key *keyring_search(struct key *keyring,
- struct key_type *type,
- const char *description)
+key_ref_t keyring_search(key_ref_t keyring,
+ struct key_type *type,
+ const char *description)
{
if (!type->match)
return ERR_PTR(-ENOKEY);
@@ -488,15 +497,19 @@ EXPORT_SYMBOL(keyring_search);
* search the given keyring only (no recursion)
* - keyring must be locked by caller
*/
-struct key *__keyring_search_one(struct key *keyring,
- const struct key_type *ktype,
- const char *description,
- key_perm_t perm)
+key_ref_t __keyring_search_one(key_ref_t keyring_ref,
+ const struct key_type *ktype,
+ const char *description,
+ key_perm_t perm)
{
struct keyring_list *klist;
- struct key *key;
+ unsigned long possessed;
+ struct key *keyring, *key;
int loop;
+ keyring = key_ref_to_ptr(keyring_ref);
+ possessed = is_key_possessed(keyring_ref);
+
rcu_read_lock();
klist = rcu_dereference(keyring->payload.subscriptions);
@@ -507,21 +520,21 @@ struct key *__keyring_search_one(struct key *keyring,
if (key->type == ktype &&
(!key->type->match ||
key->type->match(key, description)) &&
- key_permission(key, perm) &&
+ key_permission(make_key_ref(key, possessed),
+ perm) &&
!test_bit(KEY_FLAG_REVOKED, &key->flags)
)
goto found;
}
}
- key = ERR_PTR(-ENOKEY);
- goto error;
+ rcu_read_unlock();
+ return ERR_PTR(-ENOKEY);
found:
atomic_inc(&key->usage);
- error:
rcu_read_unlock();
- return key;
+ return make_key_ref(key, possessed);
} /* end __keyring_search_one() */
@@ -603,7 +616,8 @@ struct key *find_keyring_by_name(const char *name, key_serial_t bound)
if (strcmp(keyring->description, name) != 0)
continue;
- if (!key_permission(keyring, KEY_SEARCH))
+ if (!key_permission(make_key_ref(keyring, 0),
+ KEY_SEARCH))
continue;
/* found a potential candidate, but we still need to
diff --git a/security/keys/proc.c b/security/keys/proc.c
index c55cf1fd082..12b750e51fb 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -167,7 +167,7 @@ static int proc_keys_show(struct seq_file *m, void *v)
#define showflag(KEY, LETTER, FLAG) \
(test_bit(FLAG, &(KEY)->flags) ? LETTER : '-')
- seq_printf(m, "%08x %c%c%c%c%c%c %5d %4s %06x %5d %5d %-9.9s ",
+ seq_printf(m, "%08x %c%c%c%c%c%c %5d %4s %08x %5d %5d %-9.9s ",
key->serial,
showflag(key, 'I', KEY_FLAG_INSTANTIATED),
showflag(key, 'R', KEY_FLAG_REVOKED),
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index c089f78fb94..d42d2158ce1 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -39,7 +39,7 @@ struct key root_user_keyring = {
.type = &key_type_keyring,
.user = &root_key_user,
.sem = __RWSEM_INITIALIZER(root_user_keyring.sem),
- .perm = KEY_USR_ALL,
+ .perm = KEY_POS_ALL | KEY_USR_ALL,
.flags = 1 << KEY_FLAG_INSTANTIATED,
.description = "_uid.0",
#ifdef KEY_DEBUGGING
@@ -54,7 +54,7 @@ struct key root_session_keyring = {
.type = &key_type_keyring,
.user = &root_key_user,
.sem = __RWSEM_INITIALIZER(root_session_keyring.sem),
- .perm = KEY_USR_ALL,
+ .perm = KEY_POS_ALL | KEY_USR_ALL,
.flags = 1 << KEY_FLAG_INSTANTIATED,
.description = "_uid_ses.0",
#ifdef KEY_DEBUGGING
@@ -98,7 +98,7 @@ int alloc_uid_keyring(struct user_struct *user)
user->session_keyring = session_keyring;
ret = 0;
- error:
+error:
return ret;
} /* end alloc_uid_keyring() */
@@ -156,7 +156,7 @@ int install_thread_keyring(struct task_struct *tsk)
ret = 0;
key_put(old);
- error:
+error:
return ret;
} /* end install_thread_keyring() */
@@ -193,7 +193,7 @@ int install_process_keyring(struct task_struct *tsk)
}
ret = 0;
- error:
+error:
return ret;
} /* end install_process_keyring() */
@@ -236,7 +236,7 @@ static int install_session_keyring(struct task_struct *tsk,
/* we're using RCU on the pointer */
synchronize_rcu();
key_put(old);
- error:
+error:
return ret;
} /* end install_session_keyring() */
@@ -376,13 +376,13 @@ void key_fsgid_changed(struct task_struct *tsk)
* - we return -EAGAIN if we didn't find any matching key
* - we return -ENOKEY if we found only negative matching keys
*/
-struct key *search_process_keyrings(struct key_type *type,
- const void *description,
- key_match_func_t match,
- struct task_struct *context)
+key_ref_t search_process_keyrings(struct key_type *type,
+ const void *description,
+ key_match_func_t match,
+ struct task_struct *context)
{
struct request_key_auth *rka;
- struct key *key, *ret, *err, *instkey;
+ key_ref_t key_ref, ret, err, instkey_ref;
/* we want to return -EAGAIN or -ENOKEY if any of the keyrings were
* searchable, but we failed to find a key or we found a negative key;
@@ -391,46 +391,48 @@ struct key *search_process_keyrings(struct key_type *type,
*
* in terms of priority: success > -ENOKEY > -EAGAIN > other error
*/
- key = NULL;
+ key_ref = NULL;
ret = NULL;
err = ERR_PTR(-EAGAIN);
/* search the thread keyring first */
if (context->thread_keyring) {
- key = keyring_search_aux(context->thread_keyring,
- context, type, description, match);
- if (!IS_ERR(key))
+ key_ref = keyring_search_aux(
+ make_key_ref(context->thread_keyring, 1),
+ context, type, description, match);
+ if (!IS_ERR(key_ref))
goto found;
- switch (PTR_ERR(key)) {
+ switch (PTR_ERR(key_ref)) {
case -EAGAIN: /* no key */
if (ret)
break;
case -ENOKEY: /* negative key */
- ret = key;
+ ret = key_ref;
break;
default:
- err = key;
+ err = key_ref;
break;
}
}
/* search the process keyring second */
if (context->signal->process_keyring) {
- key = keyring_search_aux(context->signal->process_keyring,
- context, type, description, match);
- if (!IS_ERR(key))
+ key_ref = keyring_search_aux(
+ make_key_ref(context->signal->process_keyring, 1),
+ context, type, description, match);
+ if (!IS_ERR(key_ref))
goto found;
- switch (PTR_ERR(key)) {
+ switch (PTR_ERR(key_ref)) {
case -EAGAIN: /* no key */
if (ret)
break;
case -ENOKEY: /* negative key */
- ret = key;
+ ret = key_ref;
break;
default:
- err = key;
+ err = key_ref;
break;
}
}
@@ -438,23 +440,25 @@ struct key *search_process_keyrings(struct key_type *type,
/* search the session keyring */
if (context->signal->session_keyring) {
rcu_read_lock();
- key = keyring_search_aux(
- rcu_dereference(context->signal->session_keyring),
+ key_ref = keyring_search_aux(
+ make_key_ref(rcu_dereference(
+ context->signal->session_keyring),
+ 1),
context, type, description, match);
rcu_read_unlock();
- if (!IS_ERR(key))
+ if (!IS_ERR(key_ref))
goto found;
- switch (PTR_ERR(key)) {
+ switch (PTR_ERR(key_ref)) {
case -EAGAIN: /* no key */
if (ret)
break;
case -ENOKEY: /* negative key */
- ret = key;
+ ret = key_ref;
break;
default:
- err = key;
+ err = key_ref;
break;
}
@@ -465,51 +469,54 @@ struct key *search_process_keyrings(struct key_type *type,
goto no_key;
rcu_read_lock();
- instkey = __keyring_search_one(
- rcu_dereference(context->signal->session_keyring),
+ instkey_ref = __keyring_search_one(
+ make_key_ref(rcu_dereference(
+ context->signal->session_keyring),
+ 1),
&key_type_request_key_auth, NULL, 0);
rcu_read_unlock();
- if (IS_ERR(instkey))
+ if (IS_ERR(instkey_ref))
goto no_key;
- rka = instkey->payload.data;
+ rka = key_ref_to_ptr(instkey_ref)->payload.data;
- key = search_process_keyrings(type, description, match,
- rka->context);
- key_put(instkey);
+ key_ref = search_process_keyrings(type, description, match,
+ rka->context);
+ key_ref_put(instkey_ref);
- if (!IS_ERR(key))
+ if (!IS_ERR(key_ref))
goto found;
- switch (PTR_ERR(key)) {
+ switch (PTR_ERR(key_ref)) {
case -EAGAIN: /* no key */
if (ret)
break;
case -ENOKEY: /* negative key */
- ret = key;
+ ret = key_ref;
break;
default:
- err = key;
+ err = key_ref;
break;
}
}
/* or search the user-session keyring */
else {
- key = keyring_search_aux(context->user->session_keyring,
- context, type, description, match);
- if (!IS_ERR(key))
+ key_ref = keyring_search_aux(
+ make_key_ref(context->user->session_keyring, 1),
+ context, type, description, match);
+ if (!IS_ERR(key_ref))
goto found;
- switch (PTR_ERR(key)) {
+ switch (PTR_ERR(key_ref)) {
case -EAGAIN: /* no key */
if (ret)
break;
case -ENOKEY: /* negative key */
- ret = key;
+ ret = key_ref;
break;
default:
- err = key;
+ err = key_ref;
break;
}
}
@@ -517,29 +524,40 @@ struct key *search_process_keyrings(struct key_type *type,
no_key:
/* no key - decide on the error we're going to go for */
- key = ret ? ret : err;
+ key_ref = ret ? ret : err;
found:
- return key;
+ return key_ref;
} /* end search_process_keyrings() */
/*****************************************************************************/
/*
+ * see if the key we're looking at is the target key
+ */
+static int lookup_user_key_possessed(const struct key *key, const void *target)
+{
+ return key == target;
+
+} /* end lookup_user_key_possessed() */
+
+/*****************************************************************************/
+/*
* lookup a key given a key ID from userspace with a given permissions mask
* - don't create special keyrings unless so requested
* - partially constructed keys aren't found unless requested
*/
-struct key *lookup_user_key(struct task_struct *context, key_serial_t id,
- int create, int partial, key_perm_t perm)
+key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
+ int create, int partial, key_perm_t perm)
{
+ key_ref_t key_ref, skey_ref;
struct key *key;
int ret;
if (!context)
context = current;
- key = ERR_PTR(-ENOKEY);
+ key_ref = ERR_PTR(-ENOKEY);
switch (id) {
case KEY_SPEC_THREAD_KEYRING:
@@ -556,6 +574,7 @@ struct key *lookup_user_key(struct task_struct *context, key_serial_t id,
key = context->thread_keyring;
atomic_inc(&key->usage);
+ key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_PROCESS_KEYRING:
@@ -572,6 +591,7 @@ struct key *lookup_user_key(struct task_struct *context, key_serial_t id,
key = context->signal->process_keyring;
atomic_inc(&key->usage);
+ key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_SESSION_KEYRING:
@@ -579,7 +599,7 @@ struct key *lookup_user_key(struct task_struct *context, key_serial_t id,
/* always install a session keyring upon access if one
* doesn't exist yet */
ret = install_session_keyring(
- context, context->user->session_keyring);
+ context, context->user->session_keyring);
if (ret < 0)
goto error;
}
@@ -588,16 +608,19 @@ struct key *lookup_user_key(struct task_struct *context, key_serial_t id,
key = rcu_dereference(context->signal->session_keyring);
atomic_inc(&key->usage);
rcu_read_unlock();
+ key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_USER_KEYRING:
key = context->user->uid_keyring;
atomic_inc(&key->usage);
+ key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_USER_SESSION_KEYRING:
key = context->user->session_keyring;
atomic_inc(&key->usage);
+ key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_GROUP_KEYRING:
@@ -606,13 +629,28 @@ struct key *lookup_user_key(struct task_struct *context, key_serial_t id,
goto error;
default:
- key = ERR_PTR(-EINVAL);
+ key_ref = ERR_PTR(-EINVAL);
if (id < 1)
goto error;
key = key_lookup(id);
- if (IS_ERR(key))
+ if (IS_ERR(key)) {
+ key_ref = ERR_PTR(PTR_ERR(key));
goto error;
+ }
+
+ key_ref = make_key_ref(key, 0);
+
+ /* check to see if we possess the key */
+ skey_ref = search_process_keyrings(key->type, key,
+ lookup_user_key_possessed,
+ current);
+
+ if (!IS_ERR(skey_ref)) {
+ key_put(key);
+ key_ref = skey_ref;
+ }
+
break;
}
@@ -630,15 +668,15 @@ struct key *lookup_user_key(struct task_struct *context, key_serial_t id,
/* check the permissions */
ret = -EACCES;
- if (!key_task_permission(key, context, perm))
+ if (!key_task_permission(key_ref, context, perm))
goto invalid_key;
- error:
- return key;
+error:
+ return key_ref;
- invalid_key:
- key_put(key);
- key = ERR_PTR(ret);
+invalid_key:
+ key_ref_put(key_ref);
+ key_ref = ERR_PTR(ret);
goto error;
} /* end lookup_user_key() */
@@ -694,9 +732,9 @@ long join_session_keyring(const char *name)
ret = keyring->serial;
key_put(keyring);
- error2:
+error2:
up(&key_session_sem);
- error:
+error:
return ret;
} /* end join_session_keyring() */
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 90c1506d007..e6dd366d43a 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -129,7 +129,7 @@ static struct key *__request_key_construction(struct key_type *type,
/* create a key and add it to the queue */
key = key_alloc(type, description,
- current->fsuid, current->fsgid, KEY_USR_ALL, 0);
+ current->fsuid, current->fsgid, KEY_POS_ALL, 0);
if (IS_ERR(key))
goto alloc_failed;
@@ -365,14 +365,24 @@ struct key *request_key_and_link(struct key_type *type,
{
struct key_user *user;
struct key *key;
+ key_ref_t key_ref;
kenter("%s,%s,%s,%p",
type->name, description, callout_info, dest_keyring);
/* search all the process keyrings for a key */
- key = search_process_keyrings(type, description, type->match, current);
+ key_ref = search_process_keyrings(type, description, type->match,
+ current);
- if (PTR_ERR(key) == -EAGAIN) {
+ kdebug("search 1: %p", key_ref);
+
+ if (!IS_ERR(key_ref)) {
+ key = key_ref_to_ptr(key_ref);
+ }
+ else if (PTR_ERR(key_ref) != -EAGAIN) {
+ key = ERR_PTR(PTR_ERR(key_ref));
+ }
+ else {
/* the search failed, but the keyrings were searchable, so we
* should consult userspace if we can */
key = ERR_PTR(-ENOKEY);
@@ -384,7 +394,7 @@ struct key *request_key_and_link(struct key_type *type,
if (!user)
goto nomem;
- do {
+ for (;;) {
if (signal_pending(current))
goto interrupted;
@@ -397,10 +407,22 @@ struct key *request_key_and_link(struct key_type *type,
/* someone else made the key we want, so we need to
* search again as it might now be available to us */
- key = search_process_keyrings(type, description,
- type->match, current);
+ key_ref = search_process_keyrings(type, description,
+ type->match,
+ current);
+
+ kdebug("search 2: %p", key_ref);
- } while (PTR_ERR(key) == -EAGAIN);
+ if (!IS_ERR(key_ref)) {
+ key = key_ref_to_ptr(key_ref);
+ break;
+ }
+
+ if (PTR_ERR(key_ref) != -EAGAIN) {
+ key = ERR_PTR(PTR_ERR(key_ref));
+ break;
+ }
+ }
key_user_put(user);
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
index f2226463222..1ecd3d3fa9f 100644
--- a/security/keys/request_key_auth.c
+++ b/security/keys/request_key_auth.c
@@ -126,7 +126,7 @@ struct key *request_key_auth_new(struct key *target, struct key **_rkakey)
rkakey = key_alloc(&key_type_request_key_auth, desc,
current->fsuid, current->fsgid,
- KEY_USR_VIEW, 1);
+ KEY_POS_VIEW | KEY_USR_VIEW, 1);
if (IS_ERR(rkakey)) {
key_put(keyring);
kleave("= %ld", PTR_ERR(rkakey));
diff --git a/security/seclvl.c b/security/seclvl.c
index 96b1f2122f6..1caac016464 100644
--- a/security/seclvl.c
+++ b/security/seclvl.c
@@ -119,69 +119,6 @@ MODULE_PARM_DESC(hideHash, "When set to 0, reading seclvl/passwd from sysfs "
} while (0)
/**
- * kobject stuff
- */
-
-struct subsystem seclvl_subsys;
-
-struct seclvl_obj {
- char *name;
- struct list_head slot_list;
- struct kobject kobj;
-};
-
-/**
- * There is a seclvl_attribute struct for each file in sysfs.
- *
- * In our case, we have one of these structs for "passwd" and another
- * for "seclvl".
- */
-struct seclvl_attribute {
- struct attribute attr;
- ssize_t(*show) (struct seclvl_obj *, char *);
- ssize_t(*store) (struct seclvl_obj *, const char *, size_t);
-};
-
-/**
- * When this function is called, one of the files in sysfs is being
- * written to. attribute->store is a function pointer to whatever the
- * struct seclvl_attribute store function pointer points to. It is
- * unique for "passwd" and "seclvl".
- */
-static ssize_t
-seclvl_attr_store(struct kobject *kobj,
- struct attribute *attr, const char *buf, size_t len)
-{
- struct seclvl_obj *obj = container_of(kobj, struct seclvl_obj, kobj);
- struct seclvl_attribute *attribute =
- container_of(attr, struct seclvl_attribute, attr);
- return attribute->store ? attribute->store(obj, buf, len) : -EIO;
-}
-
-static ssize_t
-seclvl_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
-{
- struct seclvl_obj *obj = container_of(kobj, struct seclvl_obj, kobj);
- struct seclvl_attribute *attribute =
- container_of(attr, struct seclvl_attribute, attr);
- return attribute->show ? attribute->show(obj, buf) : -EIO;
-}
-
-/**
- * Callback function pointers for show and store
- */
-static struct sysfs_ops seclvlfs_sysfs_ops = {
- .show = seclvl_attr_show,
- .store = seclvl_attr_store,
-};
-
-static struct kobj_type seclvl_ktype = {
- .sysfs_ops = &seclvlfs_sysfs_ops
-};
-
-decl_subsys(seclvl, &seclvl_ktype, NULL);
-
-/**
* The actual security level. Ranges between -1 and 2 inclusive.
*/
static int seclvl;
@@ -213,97 +150,44 @@ static int seclvl_sanity(int reqlvl)
}
/**
- * Called whenever the user reads the sysfs handle to this kernel
- * object
- */
-static ssize_t seclvl_read_file(struct seclvl_obj *obj, char *buff)
-{
- return snprintf(buff, PAGE_SIZE, "%d\n", seclvl);
-}
-
-/**
* security level advancement rules:
* Valid levels are -1 through 2, inclusive.
* From -1, stuck. [ in case compiled into kernel ]
* From 0 or above, can only increment.
*/
-static int do_seclvl_advance(int newlvl)
+static void do_seclvl_advance(void *data, u64 val)
{
- if (newlvl <= seclvl) {
- seclvl_printk(1, KERN_WARNING, "Cannot advance to seclvl "
- "[%d]\n", newlvl);
- return -EINVAL;
- }
+ int ret;
+ int newlvl = (int)val;
+
+ ret = seclvl_sanity(newlvl);
+ if (ret)
+ return;
+
if (newlvl > 2) {
seclvl_printk(1, KERN_WARNING, "Cannot advance to seclvl "
"[%d]\n", newlvl);
- return -EINVAL;
+ return;
}
if (seclvl == -1) {
seclvl_printk(1, KERN_WARNING, "Not allowed to advance to "
"seclvl [%d]\n", seclvl);
- return -EPERM;
+ return;
}
- seclvl = newlvl;
- return 0;
+ seclvl = newlvl; /* would it be more "correct" to set *data? */
+ return;
}
-/**
- * Called whenever the user writes to the sysfs handle to this kernel
- * object (seclvl/seclvl). It expects a single-digit number.
- */
-static ssize_t
-seclvl_write_file(struct seclvl_obj *obj, const char *buff, size_t count)
+static u64 seclvl_int_get(void *data)
{
- unsigned long val;
- if (count > 2 || (count == 2 && buff[1] != '\n')) {
- seclvl_printk(1, KERN_WARNING, "Invalid value passed to "
- "seclvl: [%s]\n", buff);
- return -EINVAL;
- }
- val = buff[0] - 48;
- if (seclvl_sanity(val)) {
- seclvl_printk(1, KERN_WARNING, "Illegal secure level "
- "requested: [%d]\n", (int)val);
- return -EPERM;
- }
- if (do_seclvl_advance(val)) {
- seclvl_printk(0, KERN_ERR, "Failure advancing security level "
- "to %lu\n", val);
- }
- return count;
+ return *(int *)data;
}
-/* Generate sysfs_attr_seclvl */
-static struct seclvl_attribute sysfs_attr_seclvl =
-__ATTR(seclvl, (S_IFREG | S_IRUGO | S_IWUSR), seclvl_read_file,
- seclvl_write_file);
+DEFINE_SIMPLE_ATTRIBUTE(seclvl_file_ops, seclvl_int_get, do_seclvl_advance, "%lld\n");
static unsigned char hashedPassword[SHA1_DIGEST_SIZE];
/**
- * Called whenever the user reads the sysfs passwd handle.
- */
-static ssize_t seclvl_read_passwd(struct seclvl_obj *obj, char *buff)
-{
- /* So just how good *is* your password? :-) */
- char tmp[3];
- int i = 0;
- buff[0] = '\0';
- if (hideHash) {
- /* Security through obscurity */
- return 0;
- }
- while (i < SHA1_DIGEST_SIZE) {
- snprintf(tmp, 3, "%02x", hashedPassword[i]);
- strncat(buff, tmp, 2);
- i++;
- }
- strcat(buff, "\n");
- return ((SHA1_DIGEST_SIZE * 2) + 1);
-}
-
-/**
* Converts a block of plaintext of into its SHA1 hashed value.
*
* It would be nice if crypto had a wrapper to do this for us linear
@@ -347,12 +231,15 @@ plaintext_to_sha1(unsigned char *hash, const char *plaintext, int len)
* object. It hashes the password and compares the hashed results.
*/
static ssize_t
-seclvl_write_passwd(struct seclvl_obj *obj, const char *buff, size_t count)
+passwd_write_file(struct file * file, const char __user * buf,
+ size_t count, loff_t *ppos)
{
int i;
unsigned char tmp[SHA1_DIGEST_SIZE];
+ char *page;
int rc;
int len;
+
if (!*passwd && !*sha1_passwd) {
seclvl_printk(0, KERN_ERR, "Attempt to password-unlock the "
"seclvl module, but neither a plain text "
@@ -363,32 +250,45 @@ seclvl_write_passwd(struct seclvl_obj *obj, const char *buff, size_t count)
"maintainer about this event.\n");
return -EINVAL;
}
- len = strlen(buff);
+
+ if (count < 0 || count >= PAGE_SIZE)
+ return -EINVAL;
+ if (*ppos != 0)
+ return -EINVAL;
+ page = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+ len = -EFAULT;
+ if (copy_from_user(page, buf, count))
+ goto out;
+
+ len = strlen(page);
/* ``echo "secret" > seclvl/passwd'' includes a newline */
- if (buff[len - 1] == '\n') {
+ if (page[len - 1] == '\n')
len--;
- }
/* Hash the password, then compare the hashed values */
- if ((rc = plaintext_to_sha1(tmp, buff, len))) {
+ if ((rc = plaintext_to_sha1(tmp, page, len))) {
seclvl_printk(0, KERN_ERR, "Error hashing password: rc = "
"[%d]\n", rc);
return rc;
}
for (i = 0; i < SHA1_DIGEST_SIZE; i++) {
- if (hashedPassword[i] != tmp[i]) {
+ if (hashedPassword[i] != tmp[i])
return -EPERM;
- }
}
seclvl_printk(0, KERN_INFO,
"Password accepted; seclvl reduced to 0.\n");
seclvl = 0;
- return count;
+ len = count;
+
+out:
+ free_page((unsigned long)page);
+ return len;
}
-/* Generate sysfs_attr_passwd */
-static struct seclvl_attribute sysfs_attr_passwd =
-__ATTR(passwd, (S_IFREG | S_IRUGO | S_IWUSR), seclvl_read_passwd,
- seclvl_write_passwd);
+static struct file_operations passwd_file_ops = {
+ .write = passwd_write_file,
+};
/**
* Explicitely disallow ptrace'ing the init process.
@@ -579,9 +479,8 @@ static void seclvl_file_free_security(struct file *filp)
*/
static int seclvl_umount(struct vfsmount *mnt, int flags)
{
- if (current->pid == 1) {
+ if (current->pid == 1)
return 0;
- }
if (seclvl == 2) {
seclvl_printk(1, KERN_WARNING, "Attempt to unmount in secure "
"level %d\n", seclvl);
@@ -647,22 +546,34 @@ static int processPassword(void)
}
/**
- * Sysfs registrations
+ * securityfs registrations
*/
-static int doSysfsRegistrations(void)
+struct dentry *dir_ino, *seclvl_ino, *passwd_ino;
+
+static int seclvlfs_register(void)
{
- int rc = 0;
- if ((rc = subsystem_register(&seclvl_subsys))) {
- seclvl_printk(0, KERN_WARNING,
- "Error [%d] registering seclvl subsystem\n", rc);
- return rc;
- }
- sysfs_create_file(&seclvl_subsys.kset.kobj, &sysfs_attr_seclvl.attr);
+ dir_ino = securityfs_create_dir("seclvl", NULL);
+ if (!dir_ino)
+ return -EFAULT;
+
+ seclvl_ino = securityfs_create_file("seclvl", S_IRUGO | S_IWUSR,
+ dir_ino, &seclvl, &seclvl_file_ops);
+ if (!seclvl_ino)
+ goto out_deldir;
if (*passwd || *sha1_passwd) {
- sysfs_create_file(&seclvl_subsys.kset.kobj,
- &sysfs_attr_passwd.attr);
+ passwd_ino = securityfs_create_file("passwd", S_IRUGO | S_IWUSR,
+ dir_ino, NULL, &passwd_file_ops);
+ if (!passwd_ino)
+ goto out_delf;
}
return 0;
+
+out_deldir:
+ securityfs_remove(dir_ino);
+out_delf:
+ securityfs_remove(seclvl_ino);
+
+ return -EFAULT;
}
/**
@@ -677,8 +588,6 @@ static int __init seclvl_init(void)
rc = -EINVAL;
goto exit;
}
- sysfs_attr_seclvl.attr.owner = THIS_MODULE;
- sysfs_attr_passwd.attr.owner = THIS_MODULE;
if (initlvl < -1 || initlvl > 2) {
seclvl_printk(0, KERN_ERR, "Error: bad initial securelevel "
"[%d].\n", initlvl);
@@ -706,7 +615,7 @@ static int __init seclvl_init(void)
} /* if primary module registered */
secondary = 1;
} /* if we registered ourselves with the security framework */
- if ((rc = doSysfsRegistrations())) {
+ if ((rc = seclvlfs_register())) {
seclvl_printk(0, KERN_ERR, "Error registering with sysfs\n");
goto exit;
}
@@ -724,12 +633,10 @@ static int __init seclvl_init(void)
*/
static void __exit seclvl_exit(void)
{
- sysfs_remove_file(&seclvl_subsys.kset.kobj, &sysfs_attr_seclvl.attr);
- if (*passwd || *sha1_passwd) {
- sysfs_remove_file(&seclvl_subsys.kset.kobj,
- &sysfs_attr_passwd.attr);
- }
- subsystem_unregister(&seclvl_subsys);
+ securityfs_remove(seclvl_ino);
+ if (*passwd || *sha1_passwd)
+ securityfs_remove(passwd_ino);
+ securityfs_remove(dir_ino);
if (secondary == 1) {
mod_unreg_security(MY_NAME, &seclvl_ops);
} else if (unregister_security(&seclvl_ops)) {
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index cf6020f8540..12e4fb72bf0 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -242,7 +242,7 @@ void __init avc_init(void)
avc_node_cachep = kmem_cache_create("avc_node", sizeof(struct avc_node),
0, SLAB_PANIC, NULL, NULL);
- audit_log(current->audit_context, AUDIT_KERNEL, "AVC INITIALIZED\n");
+ audit_log(current->audit_context, GFP_KERNEL, AUDIT_KERNEL, "AVC INITIALIZED\n");
}
int avc_get_hash_stats(char *page)
@@ -550,7 +550,7 @@ void avc_audit(u32 ssid, u32 tsid,
return;
}
- ab = audit_log_start(current->audit_context, AUDIT_AVC);
+ ab = audit_log_start(current->audit_context, GFP_ATOMIC, AUDIT_AVC);
if (!ab)
return; /* audit_panic has been called */
audit_log_format(ab, "avc: %s ", denied ? "denied" : "granted");
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index f40c8221ec1..b13be15165f 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -630,6 +630,16 @@ static inline u16 inode_mode_to_security_class(umode_t mode)
return SECCLASS_FILE;
}
+static inline int default_protocol_stream(int protocol)
+{
+ return (protocol == IPPROTO_IP || protocol == IPPROTO_TCP);
+}
+
+static inline int default_protocol_dgram(int protocol)
+{
+ return (protocol == IPPROTO_IP || protocol == IPPROTO_UDP);
+}
+
static inline u16 socket_type_to_security_class(int family, int type, int protocol)
{
switch (family) {
@@ -646,10 +656,16 @@ static inline u16 socket_type_to_security_class(int family, int type, int protoc
case PF_INET6:
switch (type) {
case SOCK_STREAM:
- return SECCLASS_TCP_SOCKET;
+ if (default_protocol_stream(protocol))
+ return SECCLASS_TCP_SOCKET;
+ else
+ return SECCLASS_RAWIP_SOCKET;
case SOCK_DGRAM:
- return SECCLASS_UDP_SOCKET;
- case SOCK_RAW:
+ if (default_protocol_dgram(protocol))
+ return SECCLASS_UDP_SOCKET;
+ else
+ return SECCLASS_RAWIP_SOCKET;
+ default:
return SECCLASS_RAWIP_SOCKET;
}
break;
@@ -2970,6 +2986,8 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
/*
* If PF_INET or PF_INET6, check name_bind permission for the port.
+ * Multiple address binding for SCTP is not supported yet: we just
+ * check the first address now.
*/
family = sock->sk->sk_family;
if (family == PF_INET || family == PF_INET6) {
@@ -3014,12 +3032,12 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
goto out;
}
- switch(sk->sk_protocol) {
- case IPPROTO_TCP:
+ switch(isec->sclass) {
+ case SECCLASS_TCP_SOCKET:
node_perm = TCP_SOCKET__NODE_BIND;
break;
- case IPPROTO_UDP:
+ case SECCLASS_UDP_SOCKET:
node_perm = UDP_SOCKET__NODE_BIND;
break;
@@ -3389,7 +3407,7 @@ static int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
err = selinux_nlmsg_lookup(isec->sclass, nlh->nlmsg_type, &perm);
if (err) {
if (err == -EINVAL) {
- audit_log(current->audit_context, AUDIT_SELINUX_ERR,
+ audit_log(current->audit_context, GFP_KERNEL, AUDIT_SELINUX_ERR,
"SELinux: unrecognized netlink message"
" type=%hu for sclass=%hu\n",
nlh->nlmsg_type, isec->sclass);
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 92b89dc99bc..aecdded55e7 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -381,7 +381,7 @@ static int security_validtrans_handle_fail(struct context *ocontext,
goto out;
if (context_struct_to_string(tcontext, &t, &tlen) < 0)
goto out;
- audit_log(current->audit_context, AUDIT_SELINUX_ERR,
+ audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"security_validate_transition: denied for"
" oldcontext=%s newcontext=%s taskcontext=%s tclass=%s",
o, n, t, policydb.p_class_val_to_name[tclass-1]);
@@ -787,7 +787,7 @@ static int compute_sid_handle_invalid_context(
goto out;
if (context_struct_to_string(newcontext, &n, &nlen) < 0)
goto out;
- audit_log(current->audit_context, AUDIT_SELINUX_ERR,
+ audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"security_compute_sid: invalid context %s"
" for scontext=%s"
" tcontext=%s"
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-07 22:23:31 +0000