Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Pull security subsystem updates from James Morris:
 "Nothing major for this kernel, just maintenance updates"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (21 commits)
  apparmor: add the ability to report a sha1 hash of loaded policy
  apparmor: export set of capabilities supported by the apparmor module
  apparmor: add the profile introspection file to interface
  apparmor: add an optional profile attachment string for profiles
  apparmor: add interface files for profiles and namespaces
  apparmor: allow setting any profile into the unconfined state
  apparmor: make free_profile available outside of policy.c
  apparmor: rework namespace free path
  apparmor: update how unconfined is handled
  apparmor: change how profile replacement update is done
  apparmor: convert profile lists to RCU based locking
  apparmor: provide base for multiple profiles to be replaced at once
  apparmor: add a features/policy dir to interface
  apparmor: enable users to query whether apparmor is enabled
  apparmor: remove minimum size check for vmalloc()
  Smack: parse multiple rules per write to load2, up to PAGE_SIZE-1 bytes
  Smack: network label match fix
  security: smack: add a hash table to quicken smk_find_entry()
  security: smack: fix memleak in smk_write_rules_list()
  xattr: Constify ->name member of "struct xattr".
  ...

fs/ocfs2/xattr.h

@@ -32,7 +32,7 @@ enum ocfs2_xattr_type {
 
 struct ocfs2_security_xattr_info {
 	int enable;
-	char *name;
+	const char *name;
 	void *value;
 	size_t value_len;
 };

include/linux/security.h

@@ -1492,7 +1492,7 @@ struct security_operations {
 	int (*inode_alloc_security) (struct inode *inode);
 	void (*inode_free_security) (struct inode *inode);
 	int (*inode_init_security) (struct inode *inode, struct inode *dir,
-				    const struct qstr *qstr, char **name,
+				    const struct qstr *qstr, const char **name,
 				    void **value, size_t *len);
 	int (*inode_create) (struct inode *dir,
 			     struct dentry *dentry, umode_t mode);
@@ -1770,7 +1770,7 @@ int security_inode_init_security(struct inode *inode, struct inode *dir,
 				 const struct qstr *qstr,
 				 initxattrs initxattrs, void *fs_data);
 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
-				     const struct qstr *qstr, char **name,
+				     const struct qstr *qstr, const char **name,
 				     void **value, size_t *len);
 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode);
 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
@@ -2094,8 +2094,8 @@ static inline int security_inode_init_security(struct inode *inode,
 static inline int security_old_inode_init_security(struct inode *inode,
 						   struct inode *dir,
 						   const struct qstr *qstr,
-						   char **name, void **value,
-						   size_t *len)
+						   const char **name,
+						   void **value, size_t *len)
 {
 	return -EOPNOTSUPP;
 }

include/linux/xattr.h

@@ -31,7 +31,7 @@ struct xattr_handler {
 };
 
 struct xattr {
-	char *name;
+	const char *name;
 	void *value;
 	size_t value_len;
 };

include/uapi/linux/reiserfs_xattr.h

@@ -16,7 +16,7 @@ struct reiserfs_xattr_header {
 };
 
 struct reiserfs_security_handle {
-	char *name;
+	const char *name;
 	void *value;
 	size_t length;
 };

security/apparmor/Kconfig

@@ -29,3 +29,15 @@ config SECURITY_APPARMOR_BOOTPARAM_VALUE
 	  boot.
 
 	  If you are unsure how to answer this question, answer 1.
+
+config SECURITY_APPARMOR_HASH
+	bool "SHA1 hash of loaded profiles"
+	depends on SECURITY_APPARMOR
+	depends on CRYPTO
+	select CRYPTO_SHA1
+	default y
+
+	help
+	  This option selects whether sha1 hashing is done against loaded
+          profiles and exported for inspection to user space via the apparmor
+          filesystem.

security/apparmor/Makefile

@@ -5,6 +5,7 @@ obj-$(CONFIG_SECURITY_APPARMOR) += apparmor.o
 apparmor-y := apparmorfs.o audit.o capability.o context.o ipc.o lib.o match.o \
               path.o domain.o policy.o policy_unpack.o procattr.o lsm.o \
               resource.o sid.o file.o
+apparmor-$(CONFIG_SECURITY_APPARMOR_HASH) += crypto.o
 
 clean-files := capability_names.h rlim_names.h
 
@@ -18,7 +19,11 @@ quiet_cmd_make-caps = GEN     $@
 cmd_make-caps = echo "static const char *const capability_names[] = {" > $@ ;\
 	sed $< >>$@ -r -n -e '/CAP_FS_MASK/d' \
 	-e 's/^\#define[ \t]+CAP_([A-Z0-9_]+)[ \t]+([0-9]+)/[\2] = "\L\1",/p';\
-	echo "};" >> $@
+	echo "};" >> $@ ;\
+	echo -n '\#define AA_FS_CAPS_MASK "' >> $@ ;\
+	sed $< -r -n -e '/CAP_FS_MASK/d' \
+	    -e 's/^\#define[ \t]+CAP_([A-Z0-9_]+)[ \t]+([0-9]+)/\L\1/p' | \
+	     tr '\n' ' ' | sed -e 's/ $$/"\n/' >> $@
 
 
 # Build a lower case string table of rlimit names.

security/apparmor/apparmorfs.c

@@ -12,6 +12,7 @@
  * License.
  */
 
+#include <linux/ctype.h>
 #include <linux/security.h>
 #include <linux/vmalloc.h>
 #include <linux/module.h>
@@ -19,14 +20,55 @@
 #include <linux/uaccess.h>
 #include <linux/namei.h>
 #include <linux/capability.h>
+#include <linux/rcupdate.h>
 
 #include "include/apparmor.h"
 #include "include/apparmorfs.h"
 #include "include/audit.h"
 #include "include/context.h"
+#include "include/crypto.h"
 #include "include/policy.h"
 #include "include/resource.h"
 
+/**
+ * aa_mangle_name - mangle a profile name to std profile layout form
+ * @name: profile name to mangle  (NOT NULL)
+ * @target: buffer to store mangled name, same length as @name (MAYBE NULL)
+ *
+ * Returns: length of mangled name
+ */
+static int mangle_name(char *name, char *target)
+{
+	char *t = target;
+
+	while (*name == '/' || *name == '.')
+		name++;
+
+	if (target) {
+		for (; *name; name++) {
+			if (*name == '/')
+				*(t)++ = '.';
+			else if (isspace(*name))
+				*(t)++ = '_';
+			else if (isalnum(*name) || strchr("._-", *name))
+				*(t)++ = *name;
+		}
+
+		*t = 0;
+	} else {
+		int len = 0;
+		for (; *name; name++) {
+			if (isalnum(*name) || isspace(*name) ||
+			    strchr("/._-", *name))
+				len++;
+		}
+
+		return len;
+	}
+
+	return t - target;
+}
+
 /**
  * aa_simple_write_to_buffer - common routine for getting policy from user
  * @op: operation doing the user buffer copy
@@ -182,8 +224,567 @@ const struct file_operations aa_fs_seq_file_ops = {
 	.release	= single_release,
 };
 
-/** Base file system setup **/
+static int aa_fs_seq_profile_open(struct inode *inode, struct file *file,
+				  int (*show)(struct seq_file *, void *))
+{
+	struct aa_replacedby *r = aa_get_replacedby(inode->i_private);
+	int error = single_open(file, show, r);
+
+	if (error) {
+		file->private_data = NULL;
+		aa_put_replacedby(r);
+	}
+
+	return error;
+}
+
+static int aa_fs_seq_profile_release(struct inode *inode, struct file *file)
+{
+	struct seq_file *seq = (struct seq_file *) file->private_data;
+	if (seq)
+		aa_put_replacedby(seq->private);
+	return single_release(inode, file);
+}
+
+static int aa_fs_seq_profname_show(struct seq_file *seq, void *v)
+{
+	struct aa_replacedby *r = seq->private;
+	struct aa_profile *profile = aa_get_profile_rcu(&r->profile);
+	seq_printf(seq, "%s\n", profile->base.name);
+	aa_put_profile(profile);
+
+	return 0;
+}
+
+static int aa_fs_seq_profname_open(struct inode *inode, struct file *file)
+{
+	return aa_fs_seq_profile_open(inode, file, aa_fs_seq_profname_show);
+}
+
+static const struct file_operations aa_fs_profname_fops = {
+	.owner		= THIS_MODULE,
+	.open		= aa_fs_seq_profname_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= aa_fs_seq_profile_release,
+};
+
+static int aa_fs_seq_profmode_show(struct seq_file *seq, void *v)
+{
+	struct aa_replacedby *r = seq->private;
+	struct aa_profile *profile = aa_get_profile_rcu(&r->profile);
+	seq_printf(seq, "%s\n", aa_profile_mode_names[profile->mode]);
+	aa_put_profile(profile);
+
+	return 0;
+}
+
+static int aa_fs_seq_profmode_open(struct inode *inode, struct file *file)
+{
+	return aa_fs_seq_profile_open(inode, file, aa_fs_seq_profmode_show);
+}
+
+static const struct file_operations aa_fs_profmode_fops = {
+	.owner		= THIS_MODULE,
+	.open		= aa_fs_seq_profmode_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= aa_fs_seq_profile_release,
+};
+
+static int aa_fs_seq_profattach_show(struct seq_file *seq, void *v)
+{
+	struct aa_replacedby *r = seq->private;
+	struct aa_profile *profile = aa_get_profile_rcu(&r->profile);
+	if (profile->attach)
+		seq_printf(seq, "%s\n", profile->attach);
+	else if (profile->xmatch)
+		seq_puts(seq, "<unknown>\n");
+	else
+		seq_printf(seq, "%s\n", profile->base.name);
+	aa_put_profile(profile);
+
+	return 0;
+}
+
+static int aa_fs_seq_profattach_open(struct inode *inode, struct file *file)
+{
+	return aa_fs_seq_profile_open(inode, file, aa_fs_seq_profattach_show);
+}
+
+static const struct file_operations aa_fs_profattach_fops = {
+	.owner		= THIS_MODULE,
+	.open		= aa_fs_seq_profattach_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= aa_fs_seq_profile_release,
+};
+
+static int aa_fs_seq_hash_show(struct seq_file *seq, void *v)
+{
+	struct aa_replacedby *r = seq->private;
+	struct aa_profile *profile = aa_get_profile_rcu(&r->profile);
+	unsigned int i, size = aa_hash_size();
+
+	if (profile->hash) {
+		for (i = 0; i < size; i++)
+			seq_printf(seq, "%.2x", profile->hash[i]);
+		seq_puts(seq, "\n");
+	}
+
+	return 0;
+}
+
+static int aa_fs_seq_hash_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, aa_fs_seq_hash_show, inode->i_private);
+}
+
+static const struct file_operations aa_fs_seq_hash_fops = {
+	.owner		= THIS_MODULE,
+	.open		= aa_fs_seq_hash_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+/** fns to setup dynamic per profile/namespace files **/
+void __aa_fs_profile_rmdir(struct aa_profile *profile)
+{
+	struct aa_profile *child;
+	int i;
+
+	if (!profile)
+		return;
+
+	list_for_each_entry(child, &profile->base.profiles, base.list)
+		__aa_fs_profile_rmdir(child);
+
+	for (i = AAFS_PROF_SIZEOF - 1; i >= 0; --i) {
+		struct aa_replacedby *r;
+		if (!profile->dents[i])
+			continue;
+
+		r = profile->dents[i]->d_inode->i_private;
+		securityfs_remove(profile->dents[i]);
+		aa_put_replacedby(r);
+		profile->dents[i] = NULL;
+	}
+}
+
+void __aa_fs_profile_migrate_dents(struct aa_profile *old,
+				   struct aa_profile *new)
+{
+	int i;
+
+	for (i = 0; i < AAFS_PROF_SIZEOF; i++) {
+		new->dents[i] = old->dents[i];
+		old->dents[i] = NULL;
+	}
+}
+
+static struct dentry *create_profile_file(struct dentry *dir, const char *name,
+					  struct aa_profile *profile,
+					  const struct file_operations *fops)
+{
+	struct aa_replacedby *r = aa_get_replacedby(profile->replacedby);
+	struct dentry *dent;
+
+	dent = securityfs_create_file(name, S_IFREG | 0444, dir, r, fops);
+	if (IS_ERR(dent))
+		aa_put_replacedby(r);
+
+	return dent;
+}
+
+/* requires lock be held */
+int __aa_fs_profile_mkdir(struct aa_profile *profile, struct dentry *parent)
+{
+	struct aa_profile *child;
+	struct dentry *dent = NULL, *dir;
+	int error;
+
+	if (!parent) {
+		struct aa_profile *p;
+		p = aa_deref_parent(profile);
+		dent = prof_dir(p);
+		/* adding to parent that previously didn't have children */
+		dent = securityfs_create_dir("profiles", dent);
+		if (IS_ERR(dent))
+			goto fail;
+		prof_child_dir(p) = parent = dent;
+	}
+
+	if (!profile->dirname) {
+		int len, id_len;
+		len = mangle_name(profile->base.name, NULL);
+		id_len = snprintf(NULL, 0, ".%ld", profile->ns->uniq_id);
+
+		profile->dirname = kmalloc(len + id_len + 1, GFP_KERNEL);
+		if (!profile->dirname)
+			goto fail;
+
+		mangle_name(profile->base.name, profile->dirname);
+		sprintf(profile->dirname + len, ".%ld", profile->ns->uniq_id++);
+	}
+
+	dent = securityfs_create_dir(profile->dirname, parent);
+	if (IS_ERR(dent))
+		goto fail;
+	prof_dir(profile) = dir = dent;
+
+	dent = create_profile_file(dir, "name", profile, &aa_fs_profname_fops);
+	if (IS_ERR(dent))
+		goto fail;
+	profile->dents[AAFS_PROF_NAME] = dent;
+
+	dent = create_profile_file(dir, "mode", profile, &aa_fs_profmode_fops);
+	if (IS_ERR(dent))
+		goto fail;
+	profile->dents[AAFS_PROF_MODE] = dent;
+
+	dent = create_profile_file(dir, "attach", profile,
+				   &aa_fs_profattach_fops);
+	if (IS_ERR(dent))
+		goto fail;
+	profile->dents[AAFS_PROF_ATTACH] = dent;
+
+	if (profile->hash) {
+		dent = create_profile_file(dir, "sha1", profile,
+					   &aa_fs_seq_hash_fops);
+		if (IS_ERR(dent))
+			goto fail;
+		profile->dents[AAFS_PROF_HASH] = dent;
+	}
+
+	list_for_each_entry(child, &profile->base.profiles, base.list) {
+		error = __aa_fs_profile_mkdir(child, prof_child_dir(profile));
+		if (error)
+			goto fail2;
+	}
+
+	return 0;
+
+fail:
+	error = PTR_ERR(dent);
+
+fail2:
+	__aa_fs_profile_rmdir(profile);
+
+	return error;
+}
+
+void __aa_fs_namespace_rmdir(struct aa_namespace *ns)
+{
+	struct aa_namespace *sub;
+	struct aa_profile *child;
+	int i;
+
+	if (!ns)
+		return;
+
+	list_for_each_entry(child, &ns->base.profiles, base.list)
+		__aa_fs_profile_rmdir(child);
+
+	list_for_each_entry(sub, &ns->sub_ns, base.list) {
+		mutex_lock(&sub->lock);
+		__aa_fs_namespace_rmdir(sub);
+		mutex_unlock(&sub->lock);
+	}
 
+	for (i = AAFS_NS_SIZEOF - 1; i >= 0; --i) {
+		securityfs_remove(ns->dents[i]);
+		ns->dents[i] = NULL;
+	}
+}
+
+int __aa_fs_namespace_mkdir(struct aa_namespace *ns, struct dentry *parent,
+			    const char *name)
+{
+	struct aa_namespace *sub;
+	struct aa_profile *child;
+	struct dentry *dent, *dir;
+	int error;
+
+	if (!name)
+		name = ns->base.name;
+
+	dent = securityfs_create_dir(name, parent);
+	if (IS_ERR(dent))
+		goto fail;
+	ns_dir(ns) = dir = dent;
+
+	dent = securityfs_create_dir("profiles", dir);
+	if (IS_ERR(dent))
+		goto fail;
+	ns_subprofs_dir(ns) = dent;
+
+	dent = securityfs_create_dir("namespaces", dir);
+	if (IS_ERR(dent))
+		goto fail;
+	ns_subns_dir(ns) = dent;
+
+	list_for_each_entry(child, &ns->base.profiles, base.list) {
+		error = __aa_fs_profile_mkdir(child, ns_subprofs_dir(ns));
+		if (error)
+			goto fail2;
+	}
+
+	list_for_each_entry(sub, &ns->sub_ns, base.list) {
+		mutex_lock(&sub->lock);
+		error = __aa_fs_namespace_mkdir(sub, ns_subns_dir(ns), NULL);
+		mutex_unlock(&sub->lock);
+		if (error)
+			goto fail2;
+	}
+
+	return 0;
+
+fail:
+	error = PTR_ERR(dent);
+
+fail2:
+	__aa_fs_namespace_rmdir(ns);
+
+	return error;
+}
+
+
+#define list_entry_next(pos, member) \
+	list_entry(pos->member.next, typeof(*pos), member)
+#define list_entry_is_head(pos, head, member) (&pos->member == (head))
+
+/**
+ * __next_namespace - find the next namespace to list
+ * @root: root namespace to stop search at (NOT NULL)
+ * @ns: current ns position (NOT NULL)
+ *
+ * Find the next namespace from @ns under @root and handle all locking needed
+ * while switching current namespace.
+ *
+ * Returns: next namespace or NULL if at last namespace under @root
+ * Requires: ns->parent->lock to be held
+ * NOTE: will not unlock root->lock
+ */
+static struct aa_namespace *__next_namespace(struct aa_namespace *root,
+					     struct aa_namespace *ns)
+{
+	struct aa_namespace *parent, *next;
+
+	/* is next namespace a child */
+	if (!list_empty(&ns->sub_ns)) {
+		next = list_first_entry(&ns->sub_ns, typeof(*ns), base.list);
+		mutex_lock(&next->lock);
+		return next;
+	}
+
+	/* check if the next ns is a sibling, parent, gp, .. */
+	parent = ns->parent;
+	while (parent) {
+		mutex_unlock(&ns->lock);
+		next = list_entry_next(ns, base.list);
+		if (!list_entry_is_head(next, &parent->sub_ns, base.list)) {
+			mutex_lock(&next->lock);
+			return next;
+		}
+		if (parent == root)
+			return NULL;
+		ns = parent;
+		parent = parent->parent;
+	}
+
+	return NULL;
+}
+
+/**
+ * __first_profile - find the first profile in a namespace
+ * @root: namespace that is root of profiles being displayed (NOT NULL)
+ * @ns: namespace to start in   (NOT NULL)
+ *
+ * Returns: unrefcounted profile or NULL if no profile
+ * Requires: profile->ns.lock to be held
+ */
+static struct aa_profile *__first_profile(struct aa_namespace *root,
+					  struct aa_namespace *ns)
+{
+	for (; ns; ns = __next_namespace(root, ns)) {
+		if (!list_empty(&ns->base.profiles))
+			return list_first_entry(&ns->base.profiles,
+						struct aa_profile, base.list);
+	}
+	return NULL;
+}
+
+/**
+ * __next_profile - step to the next profile in a profile tree
+ * @profile: current profile in tree (NOT NULL)
+ *
+ * Perform a depth first traversal on the profile tree in a namespace
+ *
+ * Returns: next profile or NULL if done
+ * Requires: profile->ns.lock to be held
+ */
+static struct aa_profile *__next_profile(struct aa_profile *p)
+{
+	struct aa_profile *parent;
+	struct aa_namespace *ns = p->ns;
+
+	/* is next profile a child */
+	if (!list_empty(&p->base.profiles))
+		return list_first_entry(&p->base.profiles, typeof(*p),
+					base.list);
+
+	/* is next profile a sibling, parent sibling, gp, sibling, .. */
+	parent = rcu_dereference_protected(p->parent,
+					   mutex_is_locked(&p->ns->lock));
+	while (parent) {
+		p = list_entry_next(p, base.list);
+		if (!list_entry_is_head(p, &parent->base.profiles, base.list))
+			return p;
+		p = parent;
+		parent = rcu_dereference_protected(parent->parent,
+					    mutex_is_locked(&parent->ns->lock));
+	}
+
+	/* is next another profile in the namespace */
+	p = list_entry_next(p, base.list);
+	if (!list_entry_is_head(p, &ns->base.profiles, base.list))
+		return p;
+
+	return NULL;
+}
+
+/**
+ * next_profile - step to the next profile in where ever it may be
+ * @root: root namespace  (NOT NULL)
+ * @profile: current profile  (NOT NULL)
+ *
+ * Returns: next profile or NULL if there isn't one
+ */
+static struct aa_profile *next_profile(struct aa_namespace *root,
+				       struct aa_profile *profile)
+{
+	struct aa_profile *next = __next_profile(profile);
+	if (next)
+		return next;
+
+	/* finished all profiles in namespace move to next namespace */
+	return __first_profile(root, __next_namespace(root, profile->ns));
+}
+
+/**
+ * p_start - start a depth first traversal of profile tree
+ * @f: seq_file to fill
+ * @pos: current position
+ *
+ * Returns: first profile under current namespace or NULL if none found
+ *
+ * acquires first ns->lock
+ */
+static void *p_start(struct seq_file *f, loff_t *pos)
+{
+	struct aa_profile *profile = NULL;
+	struct aa_namespace *root = aa_current_profile()->ns;
+	loff_t l = *pos;
+	f->private = aa_get_namespace(root);
+
+
+	/* find the first profile */
+	mutex_lock(&root->lock);
+	profile = __first_profile(root, root);
+
+	/* skip to position */
+	for (; profile && l > 0; l--)
+		profile = next_profile(root, profile);
+
+	return profile;
+}
+
+/**
+ * p_next - read the next profile entry
+ * @f: seq_file to fill
+ * @p: profile previously returned
+ * @pos: current position
+ *
+ * Returns: next profile after @p or NULL if none
+ *
+ * may acquire/release locks in namespace tree as necessary
+ */
+static void *p_next(struct seq_file *f, void *p, loff_t *pos)
+{
+	struct aa_profile *profile = p;
+	struct aa_namespace *ns = f->private;
+	(*pos)++;
+
+	return next_profile(ns, profile);
+}
+
+/**
+ * p_stop - stop depth first traversal
+ * @f: seq_file we are filling
+ * @p: the last profile writen
+ *
+ * Release all locking done by p_start/p_next on namespace tree
+ */
+static void p_stop(struct seq_file *f, void *p)
+{
+	struct aa_profile *profile = p;
+	struct aa_namespace *root = f->private, *ns;
+
+	if (profile) {
+		for (ns = profile->ns; ns && ns != root; ns = ns->parent)
+			mutex_unlock(&ns->lock);
+	}
+	mutex_unlock(&root->lock);
+	aa_put_namespace(root);
+}
+
+/**
+ * seq_show_profile - show a profile entry
+ * @f: seq_file to file
+ * @p: current position (profile)    (NOT NULL)
+ *
+ * Returns: error on failure
+ */
+static int seq_show_profile(struct seq_file *f, void *p)
+{
+	struct aa_profile *profile = (struct aa_profile *)p;
+	struct aa_namespace *root = f->private;
+
+	if (profile->ns != root)
+		seq_printf(f, ":%s://", aa_ns_name(root, profile->ns));
+	seq_printf(f, "%s (%s)\n", profile->base.hname,
+		   aa_profile_mode_names[profile->mode]);
+
+	return 0;
+}
+
+static const struct seq_operations aa_fs_profiles_op = {
+	.start = p_start,
+	.next = p_next,
+	.stop = p_stop,
+	.show = seq_show_profile,
+};
+
+static int profiles_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &aa_fs_profiles_op);
+}
+
+static int profiles_release(struct inode *inode, struct file *file)
+{
+	return seq_release(inode, file);
+}
+
+static const struct file_operations aa_fs_profiles_fops = {
+	.open = profiles_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = profiles_release,
+};
+
+
+/** Base file system setup **/
 static struct aa_fs_entry aa_fs_entry_file[] = {
 	AA_FS_FILE_STRING("mask", "create read write exec append mmap_exec " \
 				  "link lock"),
@@ -198,11 +799,18 @@ static struct aa_fs_entry aa_fs_entry_domain[] = {
 	{ }
 };
 
+static struct aa_fs_entry aa_fs_entry_policy[] = {
+	AA_FS_FILE_BOOLEAN("set_load",          1),
+	{}
+};
+
 static struct aa_fs_entry aa_fs_entry_features[] = {
+	AA_FS_DIR("policy",			aa_fs_entry_policy),
 	AA_FS_DIR("domain",			aa_fs_entry_domain),
 	AA_FS_DIR("file",			aa_fs_entry_file),
 	AA_FS_FILE_U64("capability",		VFS_CAP_FLAGS_MASK),
 	AA_FS_DIR("rlimit",			aa_fs_entry_rlimit),
+	AA_FS_DIR("caps",			aa_fs_entry_caps),
 	{ }
 };
 
@@ -210,6 +818,7 @@ static struct aa_fs_entry aa_fs_entry_apparmor[] = {
 	AA_FS_FILE_FOPS(".load", 0640, &aa_fs_profile_load),
 	AA_FS_FILE_FOPS(".replace", 0640, &aa_fs_profile_replace),
 	AA_FS_FILE_FOPS(".remove", 0640, &aa_fs_profile_remove),
+	AA_FS_FILE_FOPS("profiles", 0640, &aa_fs_profiles_fops),
 	AA_FS_DIR("features", aa_fs_entry_features),
 	{ }
 };
@@ -240,6 +849,7 @@ static int __init aafs_create_file(struct aa_fs_entry *fs_file,
 	return error;
 }
 
+static void __init aafs_remove_dir(struct aa_fs_entry *fs_dir);
 /**
  * aafs_create_dir - recursively create a directory entry in the securityfs
  * @fs_dir: aa_fs_entry (and all child entries) to build (NOT NULL)
@@ -250,17 +860,16 @@ static int __init aafs_create_file(struct aa_fs_entry *fs_file,
 static int __init aafs_create_dir(struct aa_fs_entry *fs_dir,
 				  struct dentry *parent)
 {
-	int error;
 	struct aa_fs_entry *fs_file;
+	struct dentry *dir;
+	int error;
 
-	fs_dir->dentry = securityfs_create_dir(fs_dir->name, parent);
-	if (IS_ERR(fs_dir->dentry)) {
-		error = PTR_ERR(fs_dir->dentry);
-		fs_dir->dentry = NULL;
-		goto failed;
-	}
+	dir = securityfs_create_dir(fs_dir->name, parent);
+	if (IS_ERR(dir))
+		return PTR_ERR(dir);
+	fs_dir->dentry = dir;
 
-	for (fs_file = fs_dir->v.files; fs_file->name; ++fs_file) {
+	for (fs_file = fs_dir->v.files; fs_file && fs_file->name; ++fs_file) {
 		if (fs_file->v_type == AA_FS_TYPE_DIR)
 			error = aafs_create_dir(fs_file, fs_dir->dentry);
 		else
@@ -272,6 +881,8 @@ static int __init aafs_create_dir(struct aa_fs_entry *fs_dir,
 	return 0;
 
 failed:
+	aafs_remove_dir(fs_dir);
+
 	return error;
 }
 
@@ -296,7 +907,7 @@ static void __init aafs_remove_dir(struct aa_fs_entry *fs_dir)
 {
 	struct aa_fs_entry *fs_file;
 
-	for (fs_file = fs_dir->v.files; fs_file->name; ++fs_file) {
+	for (fs_file = fs_dir->v.files; fs_file && fs_file->name; ++fs_file) {
 		if (fs_file->v_type == AA_FS_TYPE_DIR)
 			aafs_remove_dir(fs_file);
 		else
@@ -340,6 +951,11 @@ static int __init aa_create_aafs(void)
 	if (error)
 		goto error;
 
+	error = __aa_fs_namespace_mkdir(root_ns, aa_fs_entry.dentry,
+					"policy");
+	if (error)
+		goto error;
+
 	/* TODO: add support for apparmorfs_null and apparmorfs_mnt */
 
 	/* Report that AppArmor fs is enabled */

security/apparmor/capability.c

@@ -27,6 +27,11 @@
  */
 #include "capability_names.h"
 
+struct aa_fs_entry aa_fs_entry_caps[] = {
+	AA_FS_FILE_STRING("mask", AA_FS_CAPS_MASK),
+	{ }
+};
+
 struct audit_cache {
 	struct aa_profile *profile;
 	kernel_cap_t caps;

security/apparmor/context.c

@@ -112,9 +112,9 @@ int aa_replace_current_profile(struct aa_profile *profile)
 		aa_clear_task_cxt_trans(cxt);
 
 	/* be careful switching cxt->profile, when racing replacement it
-	 * is possible that cxt->profile->replacedby is the reference keeping
-	 * @profile valid, so make sure to get its reference before dropping
-	 * the reference on cxt->profile */
+	 * is possible that cxt->profile->replacedby->profile is the reference
+	 * keeping @profile valid, so make sure to get its reference before
+	 * dropping the reference on cxt->profile */
 	aa_get_profile(profile);
 	aa_put_profile(cxt->profile);
 	cxt->profile = profile;
@@ -175,7 +175,7 @@ int aa_set_current_hat(struct aa_profile *profile, u64 token)
 		abort_creds(new);
 		return -EACCES;
 	}
-	cxt->profile = aa_get_profile(aa_newest_version(profile));
+	cxt->profile = aa_get_newest_profile(profile);
 	/* clear exec on switching context */
 	aa_put_profile(cxt->onexec);
 	cxt->onexec = NULL;
@@ -212,14 +212,8 @@ int aa_restore_previous_profile(u64 token)
 	}
 
 	aa_put_profile(cxt->profile);
-	cxt->profile = aa_newest_version(cxt->previous);
+	cxt->profile = aa_get_newest_profile(cxt->previous);
 	BUG_ON(!cxt->profile);
-	if (unlikely(cxt->profile != cxt->previous)) {
-		aa_get_profile(cxt->profile);
-		aa_put_profile(cxt->previous);
-	}
-	/* ref has been transfered so avoid putting ref in clear_task_cxt */
-	cxt->previous = NULL;
 	/* clear exec && prev information when restoring to previous context */
 	aa_clear_task_cxt_trans(cxt);
 

security/apparmor/crypto.c

+/*
+ * AppArmor security module
+ *
+ * This file contains AppArmor policy loading interface function definitions.
+ *
+ * Copyright 2013 Canonical Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ * Fns to provide a checksum of policy that has been loaded this can be
+ * compared to userspace policy compiles to check loaded policy is what
+ * it should be.
+ */
+
+#include <linux/crypto.h>
+
+#include "include/apparmor.h"
+#include "include/crypto.h"
+
+static unsigned int apparmor_hash_size;
+
+static struct crypto_hash *apparmor_tfm;
+
+unsigned int aa_hash_size(void)
+{
+	return apparmor_hash_size;
+}
+
+int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,
+			 size_t len)
+{
+	struct scatterlist sg[2];
+	struct hash_desc desc = {
+		.tfm = apparmor_tfm,
+		.flags = 0
+	};
+	int error = -ENOMEM;
+	u32 le32_version = cpu_to_le32(version);
+
+	if (!apparmor_tfm)
+		return 0;
+
+	sg_init_table(sg, 2);
+	sg_set_buf(&sg[0], &le32_version, 4);
+	sg_set_buf(&sg[1], (u8 *) start, len);
+
+	profile->hash = kzalloc(apparmor_hash_size, GFP_KERNEL);
+	if (!profile->hash)
+		goto fail;
+
+	error = crypto_hash_init(&desc);
+	if (error)
+		goto fail;
+	error = crypto_hash_update(&desc, &sg[0], 4);
+	if (error)
+		goto fail;
+	error = crypto_hash_update(&desc, &sg[1], len);
+	if (error)
+		goto fail;
+	error = crypto_hash_final(&desc, profile->hash);
+	if (error)
+		goto fail;
+
+	return 0;
+
+fail:
+	kfree(profile->hash);
+	profile->hash = NULL;
+
+	return error;
+}
+
+static int __init init_profile_hash(void)
+{
+	struct crypto_hash *tfm;
+
+	if (!apparmor_initialized)
+		return 0;
+
+	tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
+	if (IS_ERR(tfm)) {
+		int error = PTR_ERR(tfm);
+		AA_ERROR("failed to setup profile sha1 hashing: %d\n", error);
+		return error;
+	}
+	apparmor_tfm = tfm;
+	apparmor_hash_size = crypto_hash_digestsize(apparmor_tfm);
+
+	aa_info_message("AppArmor sha1 policy hashing enabled");
+
+	return 0;
+}
+
+late_initcall(init_profile_hash);

security/apparmor/domain.c

@@ -144,7 +144,7 @@ static struct aa_profile *__attach_match(const char *name,
 	int len = 0;
 	struct aa_profile *profile, *candidate = NULL;
 
-	list_for_each_entry(profile, head, base.list) {
+	list_for_each_entry_rcu(profile, head, base.list) {
 		if (profile->flags & PFLAG_NULL)
 			continue;
 		if (profile->xmatch && profile->xmatch_len > len) {
@@ -177,9 +177,9 @@ static struct aa_profile *find_attach(struct aa_namespace *ns,
 {
 	struct aa_profile *profile;
 
-	read_lock(&ns->lock);
+	rcu_read_lock();
 	profile = aa_get_profile(__attach_match(name, list));
-	read_unlock(&ns->lock);
+	rcu_read_unlock();
 
 	return profile;
 }
@@ -359,7 +359,7 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 	cxt = cred_cxt(bprm->cred);
 	BUG_ON(!cxt);
 
-	profile = aa_get_profile(aa_newest_version(cxt->profile));
+	profile = aa_get_newest_profile(cxt->profile);
 	/*
 	 * get the namespace from the replacement profile as replacement
 	 * can change the namespace
@@ -371,8 +371,8 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 	error = aa_path_name(&bprm->file->f_path, profile->path_flags, &buffer,
 			     &name, &info);
 	if (error) {
-		if (profile->flags &
-		    (PFLAG_IX_ON_NAME_ERROR | PFLAG_UNCONFINED))
+		if (unconfined(profile) ||
+		    (profile->flags & PFLAG_IX_ON_NAME_ERROR))
 			error = 0;
 		name = bprm->filename;
 		goto audit;
@@ -417,7 +417,7 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 
 		if (!(cp.allow & AA_MAY_ONEXEC))
 			goto audit;
-		new_profile = aa_get_profile(aa_newest_version(cxt->onexec));
+		new_profile = aa_get_newest_profile(cxt->onexec);
 		goto apply;
 	}
 
@@ -434,7 +434,7 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 				new_profile = aa_get_profile(profile);
 				goto x_clear;
 			} else if (perms.xindex & AA_X_UNCONFINED) {
-				new_profile = aa_get_profile(ns->unconfined);
+				new_profile = aa_get_newest_profile(ns->unconfined);
 				info = "ux fallback";
 			} else {
 				error = -ENOENT;
@@ -641,7 +641,10 @@ int aa_change_hat(const char *hats[], int count, u64 token, bool permtest)
 	if (count) {
 		/* attempting to change into a new hat or switch to a sibling */
 		struct aa_profile *root;
-		root = PROFILE_IS_HAT(profile) ? profile->parent : profile;
+		if (PROFILE_IS_HAT(profile))
+			root = aa_get_profile_rcu(&profile->parent);
+		else
+			root = aa_get_profile(profile);
 
 		/* find first matching hat */
 		for (i = 0; i < count && !hat; i++)
@@ -653,6 +656,7 @@ int aa_change_hat(const char *hats[], int count, u64 token, bool permtest)
 					error = -ECHILD;
 				else
 					error = -ENOENT;
+				aa_put_profile(root);
 				goto out;
 			}
 
@@ -667,6 +671,7 @@ int aa_change_hat(const char *hats[], int count, u64 token, bool permtest)
 
 			/* freed below */
 			name = new_compound_name(root->base.hname, hats[0]);
+			aa_put_profile(root);
 			target = name;
 			/* released below */
 			hat = aa_new_null_profile(profile, 1);
@@ -676,6 +681,7 @@ int aa_change_hat(const char *hats[], int count, u64 token, bool permtest)
 				goto audit;
 			}
 		} else {
+			aa_put_profile(root);
 			target = hat->base.hname;
 			if (!PROFILE_IS_HAT(hat)) {
 				info = "target not hat";

security/apparmor/include/apparmor.h

@@ -78,6 +78,12 @@ static inline void *kvzalloc(size_t size)
 	return __aa_kvmalloc(size, __GFP_ZERO);
 }
 
+/* returns 0 if kref not incremented */
+static inline int kref_get_not0(struct kref *kref)
+{
+	return atomic_inc_not_zero(&kref->refcount);
+}
+
 /**
  * aa_strneq - compare null terminated @str to a non null terminated substring
  * @str: a null terminated string

security/apparmor/include/apparmorfs.h

@@ -61,4 +61,44 @@ extern const struct file_operations aa_fs_seq_file_ops;
 
 extern void __init aa_destroy_aafs(void);
 
+struct aa_profile;
+struct aa_namespace;
+
+enum aafs_ns_type {
+	AAFS_NS_DIR,
+	AAFS_NS_PROFS,
+	AAFS_NS_NS,
+	AAFS_NS_COUNT,
+	AAFS_NS_MAX_COUNT,
+	AAFS_NS_SIZE,
+	AAFS_NS_MAX_SIZE,
+	AAFS_NS_OWNER,
+	AAFS_NS_SIZEOF,
+};
+
+enum aafs_prof_type {
+	AAFS_PROF_DIR,
+	AAFS_PROF_PROFS,
+	AAFS_PROF_NAME,
+	AAFS_PROF_MODE,
+	AAFS_PROF_ATTACH,
+	AAFS_PROF_HASH,
+	AAFS_PROF_SIZEOF,
+};
+
+#define ns_dir(X) ((X)->dents[AAFS_NS_DIR])
+#define ns_subns_dir(X) ((X)->dents[AAFS_NS_NS])
+#define ns_subprofs_dir(X) ((X)->dents[AAFS_NS_PROFS])
+
+#define prof_dir(X) ((X)->dents[AAFS_PROF_DIR])
+#define prof_child_dir(X) ((X)->dents[AAFS_PROF_PROFS])
+
+void __aa_fs_profile_rmdir(struct aa_profile *profile);
+void __aa_fs_profile_migrate_dents(struct aa_profile *old,
+				   struct aa_profile *new);
+int __aa_fs_profile_mkdir(struct aa_profile *profile, struct dentry *parent);
+void __aa_fs_namespace_rmdir(struct aa_namespace *ns);
+int __aa_fs_namespace_mkdir(struct aa_namespace *ns, struct dentry *parent,
+			    const char *name);
+
 #endif /* __AA_APPARMORFS_H */

security/apparmor/include/audit.h

@@ -27,7 +27,6 @@ struct aa_profile;
 
 extern const char *const audit_mode_names[];
 #define AUDIT_MAX_INDEX 5
-
 enum audit_mode {
 	AUDIT_NORMAL,		/* follow normal auditing of accesses */
 	AUDIT_QUIET_DENIED,	/* quiet all denied access messages */

security/apparmor/include/capability.h

@@ -17,6 +17,8 @@
 
 #include <linux/sched.h>
 
+#include "apparmorfs.h"
+
 struct aa_profile;
 
 /* aa_caps - confinement data for capabilities
@@ -34,6 +36,8 @@ struct aa_caps {
 	kernel_cap_t extended;
 };
 
+extern struct aa_fs_entry aa_fs_entry_caps[];
+
 int aa_capable(struct task_struct *task, struct aa_profile *profile, int cap,
 	       int audit);
 

security/apparmor/include/context.h

@@ -98,7 +98,7 @@ static inline struct aa_profile *aa_cred_profile(const struct cred *cred)
 {
 	struct aa_task_cxt *cxt = cred_cxt(cred);
 	BUG_ON(!cxt || !cxt->profile);
-	return aa_newest_version(cxt->profile);
+	return cxt->profile;
 }
 
 /**
@@ -152,15 +152,14 @@ static inline struct aa_profile *aa_current_profile(void)
 	struct aa_profile *profile;
 	BUG_ON(!cxt || !cxt->profile);
 
-	profile = aa_newest_version(cxt->profile);
-	/*
-	 * Whether or not replacement succeeds, use newest profile so
-	 * there is no need to update it after replacement.
-	 */
-	if (unlikely((cxt->profile != profile)))
+	if (PROFILE_INVALID(cxt->profile)) {
+		profile = aa_get_newest_profile(cxt->profile);
 		aa_replace_current_profile(profile);
+		aa_put_profile(profile);
+		cxt = current_cxt();
+	}
 
-	return profile;
+	return cxt->profile;
 }
 
 /**

security/apparmor/include/crypto.h

+/*
+ * AppArmor security module
+ *
+ * This file contains AppArmor policy loading interface function definitions.
+ *
+ * Copyright 2013 Canonical Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ */
+
+#ifndef __APPARMOR_CRYPTO_H
+#define __APPARMOR_CRYPTO_H
+
+#include "policy.h"
+
+#ifdef CONFIG_SECURITY_APPARMOR_HASH
+unsigned int aa_hash_size(void);
+int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,
+			 size_t len);
+#else
+static inline int aa_calc_profile_hash(struct aa_profile *profile, u32 version,
+				       void *start, size_t len)
+{
+	return 0;
+}
+
+static inline unsigned int aa_hash_size(void)
+{
+	return 0;
+}
+#endif
+
+#endif /* __APPARMOR_CRYPTO_H */

security/apparmor/include/policy.h

@@ -29,8 +29,8 @@
 #include "file.h"
 #include "resource.h"
 
-extern const char *const profile_mode_names[];
-#define APPARMOR_NAMES_MAX_INDEX 3
+extern const char *const aa_profile_mode_names[];
+#define APPARMOR_MODE_NAMES_MAX_INDEX 4
 
 #define PROFILE_MODE(_profile, _mode)		\
 	((aa_g_profile_mode == (_mode)) ||	\
@@ -42,6 +42,10 @@ extern const char *const profile_mode_names[];
 
 #define PROFILE_IS_HAT(_profile) ((_profile)->flags & PFLAG_HAT)
 
+#define PROFILE_INVALID(_profile) ((_profile)->flags & PFLAG_INVALID)
+
+#define on_list_rcu(X) (!list_empty(X) && (X)->prev != LIST_POISON2)
+
 /*
  * FIXME: currently need a clean way to replace and remove profiles as a
  * set.  It should be done at the namespace level.
@@ -52,17 +56,19 @@ enum profile_mode {
 	APPARMOR_ENFORCE,	/* enforce access rules */
 	APPARMOR_COMPLAIN,	/* allow and log access violations */
 	APPARMOR_KILL,		/* kill task on access violation */
+	APPARMOR_UNCONFINED,	/* profile set to unconfined */
 };
 
 enum profile_flags {
 	PFLAG_HAT = 1,			/* profile is a hat */
-	PFLAG_UNCONFINED = 2,		/* profile is an unconfined profile */
 	PFLAG_NULL = 4,			/* profile is null learning profile */
 	PFLAG_IX_ON_NAME_ERROR = 8,	/* fallback to ix on name lookup fail */
 	PFLAG_IMMUTABLE = 0x10,		/* don't allow changes/replacement */
 	PFLAG_USER_DEFINED = 0x20,	/* user based profile - lower privs */
 	PFLAG_NO_LIST_REF = 0x40,	/* list doesn't keep profile ref */
 	PFLAG_OLD_NULL_TRANS = 0x100,	/* use // as the null transition */
+	PFLAG_INVALID = 0x200,		/* profile replaced/removed */
+	PFLAG_NS_COUNT = 0x400,		/* carries NS ref count */
 
 	/* These flags must correspond with PATH_flags */
 	PFLAG_MEDIATE_DELETED = 0x10000, /* mediate instead delegate deleted */
@@ -73,14 +79,12 @@ struct aa_profile;
 /* struct aa_policy - common part of both namespaces and profiles
  * @name: name of the object
  * @hname - The hierarchical name
- * @count: reference count of the obj
  * @list: list policy object is on
  * @profiles: head of the profiles list contained in the object
  */
 struct aa_policy {
 	char *name;
 	char *hname;
-	struct kref count;
 	struct list_head list;
 	struct list_head profiles;
 };
@@ -106,6 +110,8 @@ struct aa_ns_acct {
  * @unconfined: special unconfined profile for the namespace
  * @sub_ns: list of namespaces under the current namespace.
  * @uniq_null: uniq value used for null learning profiles
+ * @uniq_id: a unique id count for the profiles in the namespace
+ * @dents: dentries for the namespaces file entries in apparmorfs
  *
  * An aa_namespace defines the set profiles that are searched to determine
  * which profile to attach to a task.  Profiles can not be shared between
@@ -124,11 +130,14 @@ struct aa_ns_acct {
 struct aa_namespace {
 	struct aa_policy base;
 	struct aa_namespace *parent;
-	rwlock_t lock;
+	struct mutex lock;
 	struct aa_ns_acct acct;
 	struct aa_profile *unconfined;
 	struct list_head sub_ns;
 	atomic_t uniq_null;
+	long uniq_id;
+
+	struct dentry *dents[AAFS_NS_SIZEOF];
 };
 
 /* struct aa_policydb - match engine for a policy
@@ -142,12 +151,21 @@ struct aa_policydb {
 
 };
 
+struct aa_replacedby {
+	struct kref count;
+	struct aa_profile __rcu *profile;
+};
+
+
 /* struct aa_profile - basic confinement data
  * @base - base components of the profile (name, refcount, lists, lock ...)
+ * @count: reference count of the obj
+ * @rcu: rcu head used when removing from @list
  * @parent: parent of profile
  * @ns: namespace the profile is in
  * @replacedby: is set to the profile that replaced this profile
  * @rename: optional profile name that this profile renamed
+ * @attach: human readable attachment string
  * @xmatch: optional extended matching for unconfined executables names
  * @xmatch_len: xmatch prefix len, used to determine xmatch priority
  * @audit: the auditing mode of the profile
@@ -160,13 +178,15 @@ struct aa_policydb {
  * @caps: capabilities for the profile
  * @rlimits: rlimits for the profile
  *
+ * @dents: dentries for the profiles file entries in apparmorfs
+ * @dirname: name of the profile dir in apparmorfs
+ *
  * The AppArmor profile contains the basic confinement data.  Each profile
  * has a name, and exists in a namespace.  The @name and @exec_match are
  * used to determine profile attachment against unconfined tasks.  All other
  * attachments are determined by profile X transition rules.
  *
- * The @replacedby field is write protected by the profile lock.  Reads
- * are assumed to be atomic, and are done without locking.
+ * The @replacedby struct is write protected by the profile lock.
  *
  * Profiles have a hierarchy where hats and children profiles keep
  * a reference to their parent.
@@ -177,17 +197,20 @@ struct aa_policydb {
  */
 struct aa_profile {
 	struct aa_policy base;
-	struct aa_profile *parent;
+	struct kref count;
+	struct rcu_head rcu;
+	struct aa_profile __rcu *parent;
 
 	struct aa_namespace *ns;
-	struct aa_profile *replacedby;
+	struct aa_replacedby *replacedby;
 	const char *rename;
 
+	const char *attach;
 	struct aa_dfa *xmatch;
 	int xmatch_len;
 	enum audit_mode audit;
-	enum profile_mode mode;
-	u32 flags;
+	long mode;
+	long flags;
 	u32 path_flags;
 	int size;
 
@@ -195,6 +218,10 @@ struct aa_profile {
 	struct aa_file_rules file;
 	struct aa_caps caps;
 	struct aa_rlimit rlimits;
+
+	unsigned char *hash;
+	char *dirname;
+	struct dentry *dents[AAFS_PROF_SIZEOF];
 };
 
 extern struct aa_namespace *root_ns;
@@ -211,43 +238,11 @@ void aa_free_namespace_kref(struct kref *kref);
 struct aa_namespace *aa_find_namespace(struct aa_namespace *root,
 				       const char *name);
 
-static inline struct aa_policy *aa_get_common(struct aa_policy *c)
-{
-	if (c)
-		kref_get(&c->count);
-
-	return c;
-}
-
-/**
- * aa_get_namespace - increment references count on @ns
- * @ns: namespace to increment reference count of (MAYBE NULL)
- *
- * Returns: pointer to @ns, if @ns is NULL returns NULL
- * Requires: @ns must be held with valid refcount when called
- */
-static inline struct aa_namespace *aa_get_namespace(struct aa_namespace *ns)
-{
-	if (ns)
-		kref_get(&(ns->base.count));
-
-	return ns;
-}
-
-/**
- * aa_put_namespace - decrement refcount on @ns
- * @ns: namespace to put reference of
- *
- * Decrement reference count of @ns and if no longer in use free it
- */
-static inline void aa_put_namespace(struct aa_namespace *ns)
-{
-	if (ns)
-		kref_put(&ns->base.count, aa_free_namespace_kref);
-}
 
+void aa_free_replacedby_kref(struct kref *kref);
 struct aa_profile *aa_alloc_profile(const char *name);
 struct aa_profile *aa_new_null_profile(struct aa_profile *parent, int hat);
+void aa_free_profile(struct aa_profile *profile);
 void aa_free_profile_kref(struct kref *kref);
 struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name);
 struct aa_profile *aa_lookup_profile(struct aa_namespace *ns, const char *name);
@@ -259,25 +254,13 @@ ssize_t aa_remove_profiles(char *name, size_t size);
 #define PROF_ADD 1
 #define PROF_REPLACE 0
 
-#define unconfined(X) ((X)->flags & PFLAG_UNCONFINED)
+#define unconfined(X) ((X)->mode == APPARMOR_UNCONFINED)
 
-/**
- * aa_newest_version - find the newest version of @profile
- * @profile: the profile to check for newer versions of (NOT NULL)
- *
- * Returns: newest version of @profile, if @profile is the newest version
- *          return @profile.
- *
- * NOTE: the profile returned is not refcounted, The refcount on @profile
- * must be held until the caller decides what to do with the returned newest
- * version.
- */
-static inline struct aa_profile *aa_newest_version(struct aa_profile *profile)
-{
-	while (profile->replacedby)
-		profile = profile->replacedby;
 
-	return profile;
+static inline struct aa_profile *aa_deref_parent(struct aa_profile *p)
+{
+	return rcu_dereference_protected(p->parent,
+					 mutex_is_locked(&p->ns->lock));
 }
 
 /**
@@ -290,11 +273,65 @@ static inline struct aa_profile *aa_newest_version(struct aa_profile *profile)
 static inline struct aa_profile *aa_get_profile(struct aa_profile *p)
 {
 	if (p)
-		kref_get(&(p->base.count));
+		kref_get(&(p->count));
 
 	return p;
 }
 
+/**
+ * aa_get_profile_not0 - increment refcount on profile @p found via lookup
+ * @p: profile  (MAYBE NULL)
+ *
+ * Returns: pointer to @p if @p is NULL will return NULL
+ * Requires: @p must be held with valid refcount when called
+ */
+static inline struct aa_profile *aa_get_profile_not0(struct aa_profile *p)
+{
+	if (p && kref_get_not0(&p->count))
+		return p;
+
+	return NULL;
+}
+
+/**
+ * aa_get_profile_rcu - increment a refcount profile that can be replaced
+ * @p: pointer to profile that can be replaced (NOT NULL)
+ *
+ * Returns: pointer to a refcounted profile.
+ *     else NULL if no profile
+ */
+static inline struct aa_profile *aa_get_profile_rcu(struct aa_profile __rcu **p)
+{
+	struct aa_profile *c;
+
+	rcu_read_lock();
+	do {
+		c = rcu_dereference(*p);
+	} while (c && !kref_get_not0(&c->count));
+	rcu_read_unlock();
+
+	return c;
+}
+
+/**
+ * aa_get_newest_profile - find the newest version of @profile
+ * @profile: the profile to check for newer versions of
+ *
+ * Returns: refcounted newest version of @profile taking into account
+ *          replacement, renames and removals
+ *          return @profile.
+ */
+static inline struct aa_profile *aa_get_newest_profile(struct aa_profile *p)
+{
+	if (!p)
+		return NULL;
+
+	if (PROFILE_INVALID(p))
+		return aa_get_profile_rcu(&p->replacedby->profile);
+
+	return aa_get_profile(p);
+}
+
 /**
  * aa_put_profile - decrement refcount on profile @p
  * @p: profile  (MAYBE NULL)
@@ -302,7 +339,58 @@ static inline struct aa_profile *aa_get_profile(struct aa_profile *p)
 static inline void aa_put_profile(struct aa_profile *p)
 {
 	if (p)
-		kref_put(&p->base.count, aa_free_profile_kref);
+		kref_put(&p->count, aa_free_profile_kref);
+}
+
+static inline struct aa_replacedby *aa_get_replacedby(struct aa_replacedby *p)
+{
+	if (p)
+		kref_get(&(p->count));
+
+	return p;
+}
+
+static inline void aa_put_replacedby(struct aa_replacedby *p)
+{
+	if (p)
+		kref_put(&p->count, aa_free_replacedby_kref);
+}
+
+/* requires profile list write lock held */
+static inline void __aa_update_replacedby(struct aa_profile *orig,
+					  struct aa_profile *new)
+{
+	struct aa_profile *tmp = rcu_dereference(orig->replacedby->profile);
+	rcu_assign_pointer(orig->replacedby->profile, aa_get_profile(new));
+	orig->flags |= PFLAG_INVALID;
+	aa_put_profile(tmp);
+}
+
+/**
+ * aa_get_namespace - increment references count on @ns
+ * @ns: namespace to increment reference count of (MAYBE NULL)
+ *
+ * Returns: pointer to @ns, if @ns is NULL returns NULL
+ * Requires: @ns must be held with valid refcount when called
+ */
+static inline struct aa_namespace *aa_get_namespace(struct aa_namespace *ns)
+{
+	if (ns)
+		aa_get_profile(ns->unconfined);
+
+	return ns;
+}
+
+/**
+ * aa_put_namespace - decrement refcount on @ns
+ * @ns: namespace to put reference of
+ *
+ * Decrement reference count of @ns and if no longer in use free it
+ */
+static inline void aa_put_namespace(struct aa_namespace *ns)
+{
+	if (ns)
+		aa_put_profile(ns->unconfined);
 }
 
 static inline int AUDIT_MODE(struct aa_profile *profile)

security/apparmor/include/policy_unpack.h

@@ -15,6 +15,25 @@
 #ifndef __POLICY_INTERFACE_H
 #define __POLICY_INTERFACE_H
 
-struct aa_profile *aa_unpack(void *udata, size_t size, const char **ns);
+#include <linux/list.h>
+
+struct aa_load_ent {
+	struct list_head list;
+	struct aa_profile *new;
+	struct aa_profile *old;
+	struct aa_profile *rename;
+};
+
+void aa_load_ent_free(struct aa_load_ent *ent);
+struct aa_load_ent *aa_load_ent_alloc(void);
+
+#define PACKED_FLAG_HAT		1
+
+#define PACKED_MODE_ENFORCE	0
+#define PACKED_MODE_COMPLAIN	1
+#define PACKED_MODE_KILL	2
+#define PACKED_MODE_UNCONFINED	3
+
+int aa_unpack(void *udata, size_t size, struct list_head *lh, const char **ns);
 
 #endif /* __POLICY_INTERFACE_H */

security/apparmor/lib.c

@@ -97,11 +97,6 @@ void *__aa_kvmalloc(size_t size, gfp_t flags)
 	if (size <= (16*PAGE_SIZE))
 		buffer = kmalloc(size, flags | GFP_NOIO | __GFP_NOWARN);
 	if (!buffer) {
-		/* see kvfree for why size must be at least work_struct size
-		 * when allocated via vmalloc
-		 */
-		if (size < sizeof(struct work_struct))
-			size = sizeof(struct work_struct);
 		if (flags & __GFP_ZERO)
 			buffer = vzalloc(size);
 		else