/*
   * AppArmor security module
   *
   * This file contains AppArmor functions for unpacking policy loaded from
   * userspace.
   *
   * Copyright (C) 1998-2008 Novell/SUSE
   * Copyright 2009-2010 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.
   *

   * AppArmor uses a serialized binary format for loading policy. To find
   * policy format documentation look in Documentation/security/apparmor.txt

   * All policy is validated before it is used.
   */
  
  #include <asm/unaligned.h>
  #include <linux/ctype.h>
  #include <linux/errno.h>
  
  #include "include/apparmor.h"
  #include "include/audit.h"
  #include "include/context.h"

  #include "include/crypto.h"

  #include "include/match.h"
  #include "include/policy.h"
  #include "include/policy_unpack.h"

  
  /*
   * The AppArmor interface treats data as a type byte followed by the
   * actual data.  The interface has the notion of a a named entry
   * which has a name (AA_NAME typecode followed by name string) followed by
   * the entries typecode and data.  Named types allow for optional
   * elements and extensions to be added and tested for without breaking
   * backwards compatibility.
   */
  
  enum aa_code {
  	AA_U8,
  	AA_U16,
  	AA_U32,
  	AA_U64,
  	AA_NAME,		/* same as string except it is items name */
  	AA_STRING,
  	AA_BLOB,
  	AA_STRUCT,
  	AA_STRUCTEND,
  	AA_LIST,
  	AA_LISTEND,
  	AA_ARRAY,
  	AA_ARRAYEND,
  };
  
  /*
   * aa_ext is the read of the buffer containing the serialized profile.  The
   * data is copied into a kernel buffer in apparmorfs and then handed off to
   * the unpack routines.
   */
  struct aa_ext {
  	void *start;
  	void *end;
  	void *pos;		/* pointer to current position in the buffer */
  	u32 version;
  };
  
  /* audit callback for unpack fields */
  static void audit_cb(struct audit_buffer *ab, void *va)
  {
  	struct common_audit_data *sa = va;

  	if (sa->aad->iface.target) {
  		struct aa_profile *name = sa->aad->iface.target;

  		audit_log_format(ab, " name=");
  		audit_log_untrustedstring(ab, name->base.hname);
  	}

  	if (sa->aad->iface.pos)
  		audit_log_format(ab, " offset=%ld", sa->aad->iface.pos);

  }
  
  /**
   * audit_iface - do audit message for policy unpacking/load/replace/remove
   * @new: profile if it has been allocated (MAYBE NULL)
   * @name: name of the profile being manipulated (MAYBE NULL)
   * @info: any extra info about the failure (MAYBE NULL)

   * @e: buffer position info

   * @error: error code
   *
   * Returns: %0 or error
   */
  static int audit_iface(struct aa_profile *new, const char *name,
  		       const char *info, struct aa_ext *e, int error)
  {
  	struct aa_profile *profile = __aa_current_profile();
  	struct common_audit_data sa;

  	struct apparmor_audit_data aad = {0,};

  	sa.type = LSM_AUDIT_DATA_NONE;

  	sa.aad = &aad;

  	if (e)

  		aad.iface.pos = e->pos - e->start;
  	aad.iface.target = new;
  	aad.name = name;
  	aad.info = info;
  	aad.error = error;

  
  	return aa_audit(AUDIT_APPARMOR_STATUS, profile, GFP_KERNEL, &sa,
  			audit_cb);
  }
  
  /* test if read will be in packed data bounds */
  static bool inbounds(struct aa_ext *e, size_t size)
  {
  	return (size <= e->end - e->pos);
  }
  
  /**
   * aa_u16_chunck - test and do bounds checking for a u16 size based chunk
   * @e: serialized data read head (NOT NULL)
   * @chunk: start address for chunk of data (NOT NULL)
   *
   * Returns: the size of chunk found with the read head at the end of the chunk.
   */
  static size_t unpack_u16_chunk(struct aa_ext *e, char **chunk)
  {
  	size_t size = 0;
  
  	if (!inbounds(e, sizeof(u16)))
  		return 0;
  	size = le16_to_cpu(get_unaligned((u16 *) e->pos));
  	e->pos += sizeof(u16);
  	if (!inbounds(e, size))
  		return 0;
  	*chunk = e->pos;
  	e->pos += size;
  	return size;
  }
  
  /* unpack control byte */
  static bool unpack_X(struct aa_ext *e, enum aa_code code)
  {
  	if (!inbounds(e, 1))
  		return 0;
  	if (*(u8 *) e->pos != code)
  		return 0;
  	e->pos++;
  	return 1;
  }
  
  /**
   * unpack_nameX - check is the next element is of type X with a name of @name
   * @e: serialized data extent information  (NOT NULL)
   * @code: type code
   * @name: name to match to the serialized element.  (MAYBE NULL)
   *
   * check that the next serialized data element is of type X and has a tag
   * name @name.  If @name is specified then there must be a matching
   * name element in the stream.  If @name is NULL any name element will be
   * skipped and only the typecode will be tested.
   *
   * Returns 1 on success (both type code and name tests match) and the read
   * head is advanced past the headers
   *
   * Returns: 0 if either match fails, the read head does not move
   */
  static bool unpack_nameX(struct aa_ext *e, enum aa_code code, const char *name)
  {
  	/*
  	 * May need to reset pos if name or type doesn't match
  	 */
  	void *pos = e->pos;
  	/*
  	 * Check for presence of a tagname, and if present name size
  	 * AA_NAME tag value is a u16.
  	 */
  	if (unpack_X(e, AA_NAME)) {
  		char *tag = NULL;
  		size_t size = unpack_u16_chunk(e, &tag);
  		/* if a name is specified it must match. otherwise skip tag */
  		if (name && (!size || strcmp(name, tag)))
  			goto fail;
  	} else if (name) {
  		/* if a name is specified and there is no name tag fail */
  		goto fail;
  	}
  
  	/* now check if type code matches */
  	if (unpack_X(e, code))
  		return 1;
  
  fail:
  	e->pos = pos;
  	return 0;
  }
  
  static bool unpack_u32(struct aa_ext *e, u32 *data, const char *name)
  {
  	if (unpack_nameX(e, AA_U32, name)) {
  		if (!inbounds(e, sizeof(u32)))
  			return 0;
  		if (data)
  			*data = le32_to_cpu(get_unaligned((u32 *) e->pos));
  		e->pos += sizeof(u32);
  		return 1;
  	}
  	return 0;
  }
  
  static bool unpack_u64(struct aa_ext *e, u64 *data, const char *name)
  {
  	if (unpack_nameX(e, AA_U64, name)) {
  		if (!inbounds(e, sizeof(u64)))
  			return 0;
  		if (data)
  			*data = le64_to_cpu(get_unaligned((u64 *) e->pos));
  		e->pos += sizeof(u64);
  		return 1;
  	}
  	return 0;
  }
  
  static size_t unpack_array(struct aa_ext *e, const char *name)
  {
  	if (unpack_nameX(e, AA_ARRAY, name)) {
  		int size;
  		if (!inbounds(e, sizeof(u16)))
  			return 0;
  		size = (int)le16_to_cpu(get_unaligned((u16 *) e->pos));
  		e->pos += sizeof(u16);
  		return size;
  	}
  	return 0;
  }
  
  static size_t unpack_blob(struct aa_ext *e, char **blob, const char *name)
  {
  	if (unpack_nameX(e, AA_BLOB, name)) {
  		u32 size;
  		if (!inbounds(e, sizeof(u32)))
  			return 0;
  		size = le32_to_cpu(get_unaligned((u32 *) e->pos));
  		e->pos += sizeof(u32);
  		if (inbounds(e, (size_t) size)) {
  			*blob = e->pos;
  			e->pos += size;
  			return size;
  		}
  	}
  	return 0;
  }
  
  static int unpack_str(struct aa_ext *e, const char **string, const char *name)
  {
  	char *src_str;
  	size_t size = 0;
  	void *pos = e->pos;
  	*string = NULL;
  	if (unpack_nameX(e, AA_STRING, name)) {
  		size = unpack_u16_chunk(e, &src_str);
  		if (size) {
  			/* strings are null terminated, length is size - 1 */
  			if (src_str[size - 1] != 0)
  				goto fail;
  			*string = src_str;
  		}
  	}
  	return size;
  
  fail:
  	e->pos = pos;
  	return 0;
  }
  
  static int unpack_strdup(struct aa_ext *e, char **string, const char *name)
  {
  	const char *tmp;
  	void *pos = e->pos;
  	int res = unpack_str(e, &tmp, name);
  	*string = NULL;
  
  	if (!res)
  		return 0;
  
  	*string = kmemdup(tmp, res, GFP_KERNEL);
  	if (!*string) {
  		e->pos = pos;
  		return 0;
  	}
  
  	return res;
  }

  #define DFA_VALID_PERM_MASK		0xffffffff
  #define DFA_VALID_PERM2_MASK		0xffffffff

  /**
   * verify_accept - verify the accept tables of a dfa
   * @dfa: dfa to verify accept tables of (NOT NULL)
   * @flags: flags governing dfa
   *
   * Returns: 1 if valid accept tables else 0 if error
   */
  static bool verify_accept(struct aa_dfa *dfa, int flags)
  {
  	int i;
  
  	/* verify accept permissions */
  	for (i = 0; i < dfa->tables[YYTD_ID_ACCEPT]->td_lolen; i++) {
  		int mode = ACCEPT_TABLE(dfa)[i];
  
  		if (mode & ~DFA_VALID_PERM_MASK)
  			return 0;
  
  		if (ACCEPT_TABLE2(dfa)[i] & ~DFA_VALID_PERM2_MASK)
  			return 0;
  	}
  	return 1;
  }
  
  /**
   * unpack_dfa - unpack a file rule dfa
   * @e: serialized data extent information (NOT NULL)
   *
   * returns dfa or ERR_PTR or NULL if no dfa
   */
  static struct aa_dfa *unpack_dfa(struct aa_ext *e)
  {
  	char *blob = NULL;
  	size_t size;
  	struct aa_dfa *dfa = NULL;
  
  	size = unpack_blob(e, &blob, "aadfa");
  	if (size) {
  		/*
  		 * The dfa is aligned with in the blob to 8 bytes
  		 * from the beginning of the stream.

  		 * alignment adjust needed by dfa unpack

  		 */

  		size_t sz = blob - (char *) e->start -
  			((e->pos - e->start) & 7);

  		size_t pad = ALIGN(sz, 8) - sz;
  		int flags = TO_ACCEPT1_FLAG(YYTD_DATA32) |
  			TO_ACCEPT2_FLAG(YYTD_DATA32);
  
  
  		if (aa_g_paranoid_load)
  			flags |= DFA_FLAG_VERIFY_STATES;
  
  		dfa = aa_dfa_unpack(blob + pad, size - pad, flags);
  
  		if (IS_ERR(dfa))
  			return dfa;
  
  		if (!verify_accept(dfa, flags))
  			goto fail;
  	}
  
  	return dfa;
  
  fail:
  	aa_put_dfa(dfa);
  	return ERR_PTR(-EPROTO);
  }
  
  /**
   * unpack_trans_table - unpack a profile transition table
   * @e: serialized data extent information  (NOT NULL)
   * @profile: profile to add the accept table to (NOT NULL)
   *

   * Returns: 1 if table successfully unpacked

   */
  static bool unpack_trans_table(struct aa_ext *e, struct aa_profile *profile)
  {
  	void *pos = e->pos;
  
  	/* exec table is optional */
  	if (unpack_nameX(e, AA_STRUCT, "xtable")) {
  		int i, size;
  
  		size = unpack_array(e, NULL);
  		/* currently 4 exec bits and entries 0-3 are reserved iupcx */
  		if (size > 16 - 4)
  			goto fail;
  		profile->file.trans.table = kzalloc(sizeof(char *) * size,
  						    GFP_KERNEL);
  		if (!profile->file.trans.table)
  			goto fail;
  
  		profile->file.trans.size = size;
  		for (i = 0; i < size; i++) {
  			char *str;

  			int c, j, size2 = unpack_strdup(e, &str, NULL);

  			/* unpack_strdup verifies that the last character is
  			 * null termination byte.
  			 */

  			if (!size2)

  				goto fail;
  			profile->file.trans.table[i] = str;
  			/* verify that name doesn't start with space */
  			if (isspace(*str))
  				goto fail;
  
  			/* count internal #  of internal \0 */

  			for (c = j = 0; j < size2 - 2; j++) {

  				if (!str[j])
  					c++;
  			}
  			if (*str == ':') {
  				/* beginning with : requires an embedded \0,
  				 * verify that exactly 1 internal \0 exists
  				 * trailing \0 already verified by unpack_strdup
  				 */
  				if (c != 1)
  					goto fail;
  				/* first character after : must be valid */
  				if (!str[1])
  					goto fail;
  			} else if (c)
  				/* fail - all other cases with embedded \0 */
  				goto fail;
  		}
  		if (!unpack_nameX(e, AA_ARRAYEND, NULL))
  			goto fail;
  		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
  			goto fail;
  	}
  	return 1;
  
  fail:
  	aa_free_domain_entries(&profile->file.trans);
  	e->pos = pos;
  	return 0;
  }
  
  static bool unpack_rlimits(struct aa_ext *e, struct aa_profile *profile)
  {
  	void *pos = e->pos;
  
  	/* rlimits are optional */
  	if (unpack_nameX(e, AA_STRUCT, "rlimits")) {
  		int i, size;
  		u32 tmp = 0;
  		if (!unpack_u32(e, &tmp, NULL))
  			goto fail;
  		profile->rlimits.mask = tmp;
  
  		size = unpack_array(e, NULL);
  		if (size > RLIM_NLIMITS)
  			goto fail;
  		for (i = 0; i < size; i++) {

  			u64 tmp2 = 0;

  			int a = aa_map_resource(i);

  			if (!unpack_u64(e, &tmp2, NULL))

  				goto fail;

  			profile->rlimits.limits[a].rlim_max = tmp2;

  		}
  		if (!unpack_nameX(e, AA_ARRAYEND, NULL))
  			goto fail;
  		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
  			goto fail;
  	}
  	return 1;
  
  fail:
  	e->pos = pos;
  	return 0;
  }
  
  /**
   * unpack_profile - unpack a serialized profile
   * @e: serialized data extent information (NOT NULL)
   *
   * NOTE: unpack profile sets audit struct if there is a failure
   */
  static struct aa_profile *unpack_profile(struct aa_ext *e)
  {
  	struct aa_profile *profile = NULL;
  	const char *name = NULL;

  	int i, error = -EPROTO;

  	kernel_cap_t tmpcap;
  	u32 tmp;
  
  	/* check that we have the right struct being passed */
  	if (!unpack_nameX(e, AA_STRUCT, "profile"))
  		goto fail;
  	if (!unpack_str(e, &name, NULL))
  		goto fail;
  
  	profile = aa_alloc_profile(name);
  	if (!profile)
  		return ERR_PTR(-ENOMEM);
  
  	/* profile renaming is optional */
  	(void) unpack_str(e, &profile->rename, "rename");

  	/* attachment string is optional */
  	(void) unpack_str(e, &profile->attach, "attach");

  	/* xmatch is optional and may be NULL */
  	profile->xmatch = unpack_dfa(e);
  	if (IS_ERR(profile->xmatch)) {
  		error = PTR_ERR(profile->xmatch);
  		profile->xmatch = NULL;
  		goto fail;
  	}
  	/* xmatch_len is not optional if xmatch is set */
  	if (profile->xmatch) {
  		if (!unpack_u32(e, &tmp, NULL))
  			goto fail;
  		profile->xmatch_len = tmp;
  	}
  
  	/* per profile debug flags (complain, audit) */
  	if (!unpack_nameX(e, AA_STRUCT, "flags"))
  		goto fail;
  	if (!unpack_u32(e, &tmp, NULL))
  		goto fail;

  	if (tmp & PACKED_FLAG_HAT)

  		profile->flags |= PFLAG_HAT;
  	if (!unpack_u32(e, &tmp, NULL))
  		goto fail;

  	if (tmp == PACKED_MODE_COMPLAIN)

  		profile->mode = APPARMOR_COMPLAIN;

  	else if (tmp == PACKED_MODE_KILL)
  		profile->mode = APPARMOR_KILL;
  	else if (tmp == PACKED_MODE_UNCONFINED)
  		profile->mode = APPARMOR_UNCONFINED;

  	if (!unpack_u32(e, &tmp, NULL))
  		goto fail;
  	if (tmp)
  		profile->audit = AUDIT_ALL;
  
  	if (!unpack_nameX(e, AA_STRUCTEND, NULL))
  		goto fail;
  
  	/* path_flags is optional */
  	if (unpack_u32(e, &profile->path_flags, "path_flags"))
  		profile->path_flags |= profile->flags & PFLAG_MEDIATE_DELETED;
  	else
  		/* set a default value if path_flags field is not present */
  		profile->path_flags = PFLAG_MEDIATE_DELETED;
  
  	if (!unpack_u32(e, &(profile->caps.allow.cap[0]), NULL))
  		goto fail;
  	if (!unpack_u32(e, &(profile->caps.audit.cap[0]), NULL))
  		goto fail;
  	if (!unpack_u32(e, &(profile->caps.quiet.cap[0]), NULL))
  		goto fail;
  	if (!unpack_u32(e, &tmpcap.cap[0], NULL))
  		goto fail;
  
  	if (unpack_nameX(e, AA_STRUCT, "caps64")) {
  		/* optional upper half of 64 bit caps */
  		if (!unpack_u32(e, &(profile->caps.allow.cap[1]), NULL))
  			goto fail;
  		if (!unpack_u32(e, &(profile->caps.audit.cap[1]), NULL))
  			goto fail;
  		if (!unpack_u32(e, &(profile->caps.quiet.cap[1]), NULL))
  			goto fail;
  		if (!unpack_u32(e, &(tmpcap.cap[1]), NULL))
  			goto fail;
  		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
  			goto fail;
  	}
  
  	if (unpack_nameX(e, AA_STRUCT, "capsx")) {
  		/* optional extended caps mediation mask */
  		if (!unpack_u32(e, &(profile->caps.extended.cap[0]), NULL))
  			goto fail;
  		if (!unpack_u32(e, &(profile->caps.extended.cap[1]), NULL))
  			goto fail;

  		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
  			goto fail;

  	}
  
  	if (!unpack_rlimits(e, profile))
  		goto fail;

  	if (unpack_nameX(e, AA_STRUCT, "policydb")) {
  		/* generic policy dfa - optional and may be NULL */
  		profile->policy.dfa = unpack_dfa(e);
  		if (IS_ERR(profile->policy.dfa)) {
  			error = PTR_ERR(profile->policy.dfa);
  			profile->policy.dfa = NULL;
  			goto fail;
  		}
  		if (!unpack_u32(e, &profile->policy.start[0], "start"))
  			/* default start state */
  			profile->policy.start[0] = DFA_START;
  		/* setup class index */
  		for (i = AA_CLASS_FILE; i <= AA_CLASS_LAST; i++) {
  			profile->policy.start[i] =
  				aa_dfa_next(profile->policy.dfa,
  					    profile->policy.start[0],
  					    i);
  		}
  		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
  			goto fail;
  	}

  	/* get file rules */
  	profile->file.dfa = unpack_dfa(e);
  	if (IS_ERR(profile->file.dfa)) {
  		error = PTR_ERR(profile->file.dfa);
  		profile->file.dfa = NULL;
  		goto fail;
  	}
  
  	if (!unpack_u32(e, &profile->file.start, "dfa_start"))
  		/* default start state */
  		profile->file.start = DFA_START;
  
  	if (!unpack_trans_table(e, profile))
  		goto fail;
  
  	if (!unpack_nameX(e, AA_STRUCTEND, NULL))
  		goto fail;
  
  	return profile;
  
  fail:
  	if (profile)
  		name = NULL;
  	else if (!name)
  		name = "unknown";
  	audit_iface(profile, name, "failed to unpack profile", e, error);

  	aa_free_profile(profile);

  
  	return ERR_PTR(error);
  }
  
  /**
   * verify_head - unpack serialized stream header
   * @e: serialized data read head (NOT NULL)

   * @required: whether the header is required or optional

   * @ns: Returns - namespace if one is specified else NULL (NOT NULL)
   *
   * Returns: error or 0 if header is good
   */

  static int verify_header(struct aa_ext *e, int required, const char **ns)

  {
  	int error = -EPROTONOSUPPORT;

  	const char *name = NULL;
  	*ns = NULL;

  	/* get the interface version */
  	if (!unpack_u32(e, &e->version, "version")) {

  		if (required) {
  			audit_iface(NULL, NULL, "invalid profile format", e,
  				    error);
  			return error;
  		}

  		/* check that the interface version is currently supported */
  		if (e->version != 5) {
  			audit_iface(NULL, NULL, "unsupported interface version",
  				    e, error);
  			return error;
  		}

  	}

  	/* read the namespace if present */

  	if (unpack_str(e, &name, "namespace")) {
  		if (*ns && strcmp(*ns, name))
  			audit_iface(NULL, NULL, "invalid ns change", e, error);
  		else if (!*ns)
  			*ns = name;
  	}

  
  	return 0;
  }
  
  static bool verify_xindex(int xindex, int table_size)
  {
  	int index, xtype;
  	xtype = xindex & AA_X_TYPE_MASK;
  	index = xindex & AA_X_INDEX_MASK;
  	if (xtype == AA_X_TABLE && index > table_size)
  		return 0;
  	return 1;
  }
  
  /* verify dfa xindexes are in range of transition tables */
  static bool verify_dfa_xindex(struct aa_dfa *dfa, int table_size)
  {
  	int i;
  	for (i = 0; i < dfa->tables[YYTD_ID_ACCEPT]->td_lolen; i++) {
  		if (!verify_xindex(dfa_user_xindex(dfa, i), table_size))
  			return 0;
  		if (!verify_xindex(dfa_other_xindex(dfa, i), table_size))
  			return 0;
  	}
  	return 1;
  }
  
  /**
   * verify_profile - Do post unpack analysis to verify profile consistency
   * @profile: profile to verify (NOT NULL)
   *
   * Returns: 0 if passes verification else error
   */
  static int verify_profile(struct aa_profile *profile)
  {
  	if (aa_g_paranoid_load) {
  		if (profile->file.dfa &&
  		    !verify_dfa_xindex(profile->file.dfa,
  				       profile->file.trans.size)) {
  			audit_iface(profile, NULL, "Invalid named transition",
  				    NULL, -EPROTO);
  			return -EPROTO;
  		}
  	}
  
  	return 0;
  }

  void aa_load_ent_free(struct aa_load_ent *ent)
  {
  	if (ent) {
  		aa_put_profile(ent->rename);
  		aa_put_profile(ent->old);
  		aa_put_profile(ent->new);
  		kzfree(ent);
  	}
  }
  
  struct aa_load_ent *aa_load_ent_alloc(void)
  {
  	struct aa_load_ent *ent = kzalloc(sizeof(*ent), GFP_KERNEL);
  	if (ent)
  		INIT_LIST_HEAD(&ent->list);
  	return ent;
  }

  /**

   * aa_unpack - unpack packed binary profile(s) data loaded from user space

   * @udata: user data copied to kmem  (NOT NULL)
   * @size: the size of the user data

   * @lh: list to place unpacked profiles in a aa_repl_ws

   * @ns: Returns namespace profile is in if specified else NULL (NOT NULL)
   *

   * Unpack user data and return refcounted allocated profile(s) stored in
   * @lh in order of discovery, with the list chain stored in base.list
   * or error

   *

   * Returns: profile(s) on @lh else error pointer if fails to unpack

   */

  int aa_unpack(void *udata, size_t size, struct list_head *lh, const char **ns)

  {

  	struct aa_load_ent *tmp, *ent;

  	struct aa_profile *profile = NULL;
  	int error;
  	struct aa_ext e = {
  		.start = udata,
  		.end = udata + size,
  		.pos = udata,
  	};

  	*ns = NULL;
  	while (e.pos < e.end) {

  		void *start;

  		error = verify_header(&e, e.pos == e.start, ns);
  		if (error)
  			goto fail;

  		start = e.pos;

  		profile = unpack_profile(&e);
  		if (IS_ERR(profile)) {
  			error = PTR_ERR(profile);
  			goto fail;
  		}
  
  		error = verify_profile(profile);

  		if (error)
  			goto fail_profile;
  
  		error = aa_calc_profile_hash(profile, e.version, start,
  					     e.pos - start);
  		if (error)
  			goto fail_profile;

  
  		ent = aa_load_ent_alloc();
  		if (!ent) {
  			error = -ENOMEM;

  			goto fail_profile;

  		}

  		ent->new = profile;
  		list_add_tail(&ent->list, lh);

  	}

  	return 0;

  fail_profile:
  	aa_put_profile(profile);

  fail:
  	list_for_each_entry_safe(ent, tmp, lh, list) {
  		list_del_init(&ent->list);
  		aa_load_ent_free(ent);
  	}
  
  	return error;

  }