704 lines
18 KiB
C
704 lines
18 KiB
C
/*
|
|
* AppArmor security module
|
|
*
|
|
* This file contains AppArmor mediation of files
|
|
*
|
|
* Copyright (C) 1998-2008 Novell/SUSE
|
|
* Copyright 2009-2012 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.
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/namei.h>
|
|
|
|
#include "include/apparmor.h"
|
|
#include "include/audit.h"
|
|
#include "include/context.h"
|
|
#include "include/domain.h"
|
|
#include "include/file.h"
|
|
#include "include/match.h"
|
|
#include "include/mount.h"
|
|
#include "include/path.h"
|
|
#include "include/policy.h"
|
|
|
|
|
|
static void audit_mnt_flags(struct audit_buffer *ab, unsigned long flags)
|
|
{
|
|
if (flags & MS_RDONLY)
|
|
audit_log_format(ab, "ro");
|
|
else
|
|
audit_log_format(ab, "rw");
|
|
if (flags & MS_NOSUID)
|
|
audit_log_format(ab, ", nosuid");
|
|
if (flags & MS_NODEV)
|
|
audit_log_format(ab, ", nodev");
|
|
if (flags & MS_NOEXEC)
|
|
audit_log_format(ab, ", noexec");
|
|
if (flags & MS_SYNCHRONOUS)
|
|
audit_log_format(ab, ", sync");
|
|
if (flags & MS_REMOUNT)
|
|
audit_log_format(ab, ", remount");
|
|
if (flags & MS_MANDLOCK)
|
|
audit_log_format(ab, ", mand");
|
|
if (flags & MS_DIRSYNC)
|
|
audit_log_format(ab, ", dirsync");
|
|
if (flags & MS_NOATIME)
|
|
audit_log_format(ab, ", noatime");
|
|
if (flags & MS_NODIRATIME)
|
|
audit_log_format(ab, ", nodiratime");
|
|
if (flags & MS_BIND)
|
|
audit_log_format(ab, flags & MS_REC ? ", rbind" : ", bind");
|
|
if (flags & MS_MOVE)
|
|
audit_log_format(ab, ", move");
|
|
if (flags & MS_SILENT)
|
|
audit_log_format(ab, ", silent");
|
|
if (flags & MS_POSIXACL)
|
|
audit_log_format(ab, ", acl");
|
|
if (flags & MS_UNBINDABLE)
|
|
audit_log_format(ab, flags & MS_REC ? ", runbindable" :
|
|
", unbindable");
|
|
if (flags & MS_PRIVATE)
|
|
audit_log_format(ab, flags & MS_REC ? ", rprivate" :
|
|
", private");
|
|
if (flags & MS_SLAVE)
|
|
audit_log_format(ab, flags & MS_REC ? ", rslave" :
|
|
", slave");
|
|
if (flags & MS_SHARED)
|
|
audit_log_format(ab, flags & MS_REC ? ", rshared" :
|
|
", shared");
|
|
if (flags & MS_RELATIME)
|
|
audit_log_format(ab, ", relatime");
|
|
if (flags & MS_I_VERSION)
|
|
audit_log_format(ab, ", iversion");
|
|
if (flags & MS_STRICTATIME)
|
|
audit_log_format(ab, ", strictatime");
|
|
if (flags & MS_NOUSER)
|
|
audit_log_format(ab, ", nouser");
|
|
}
|
|
|
|
/**
|
|
* audit_cb - call back for mount specific audit fields
|
|
* @ab: audit_buffer (NOT NULL)
|
|
* @va: audit struct to audit values of (NOT NULL)
|
|
*/
|
|
static void audit_cb(struct audit_buffer *ab, void *va)
|
|
{
|
|
struct common_audit_data *sa = va;
|
|
|
|
if (aad(sa)->mnt.type) {
|
|
audit_log_format(ab, " fstype=");
|
|
audit_log_untrustedstring(ab, aad(sa)->mnt.type);
|
|
}
|
|
if (aad(sa)->mnt.src_name) {
|
|
audit_log_format(ab, " srcname=");
|
|
audit_log_untrustedstring(ab, aad(sa)->mnt.src_name);
|
|
}
|
|
if (aad(sa)->mnt.trans) {
|
|
audit_log_format(ab, " trans=");
|
|
audit_log_untrustedstring(ab, aad(sa)->mnt.trans);
|
|
}
|
|
if (aad(sa)->mnt.flags || aad(sa)->op == OP_MOUNT) {
|
|
audit_log_format(ab, " flags=\"");
|
|
audit_mnt_flags(ab, aad(sa)->mnt.flags);
|
|
audit_log_format(ab, "\"");
|
|
}
|
|
if (aad(sa)->mnt.data) {
|
|
audit_log_format(ab, " options=");
|
|
audit_log_untrustedstring(ab, aad(sa)->mnt.data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* audit_mount - handle the auditing of mount operations
|
|
* @profile: the profile being enforced (NOT NULL)
|
|
* @op: operation being mediated (NOT NULL)
|
|
* @name: name of object being mediated (MAYBE NULL)
|
|
* @src_name: src_name of object being mediated (MAYBE_NULL)
|
|
* @type: type of filesystem (MAYBE_NULL)
|
|
* @trans: name of trans (MAYBE NULL)
|
|
* @flags: filesystem idependent mount flags
|
|
* @data: filesystem mount flags
|
|
* @request: permissions requested
|
|
* @perms: the permissions computed for the request (NOT NULL)
|
|
* @info: extra information message (MAYBE NULL)
|
|
* @error: 0 if operation allowed else failure error code
|
|
*
|
|
* Returns: %0 or error on failure
|
|
*/
|
|
static int audit_mount(struct aa_profile *profile, int op, const char *name,
|
|
const char *src_name, const char *type,
|
|
const char *trans, unsigned long flags,
|
|
const void *data, u32 request, struct file_perms *perms,
|
|
const char *info, int error)
|
|
{
|
|
int audit_type = AUDIT_APPARMOR_AUTO;
|
|
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, op);
|
|
|
|
if (likely(!error)) {
|
|
u32 mask = perms->audit;
|
|
|
|
if (unlikely(AUDIT_MODE(profile) == AUDIT_ALL))
|
|
mask = 0xffff;
|
|
|
|
/* mask off perms that are not being force audited */
|
|
request &= mask;
|
|
|
|
if (likely(!request))
|
|
return 0;
|
|
audit_type = AUDIT_APPARMOR_AUDIT;
|
|
} else {
|
|
/* only report permissions that were denied */
|
|
request = request & ~perms->allow;
|
|
|
|
if (request & perms->kill)
|
|
audit_type = AUDIT_APPARMOR_KILL;
|
|
|
|
/* quiet known rejects, assumes quiet and kill do not overlap */
|
|
if ((request & perms->quiet) &&
|
|
AUDIT_MODE(profile) != AUDIT_NOQUIET &&
|
|
AUDIT_MODE(profile) != AUDIT_ALL)
|
|
request &= ~perms->quiet;
|
|
|
|
if (!request)
|
|
return COMPLAIN_MODE(profile) ?
|
|
complain_error(error) : error;
|
|
}
|
|
|
|
aad(&sa)->name = name;
|
|
aad(&sa)->mnt.src_name = src_name;
|
|
aad(&sa)->mnt.type = type;
|
|
aad(&sa)->mnt.trans = trans;
|
|
aad(&sa)->mnt.flags = flags;
|
|
if (data && (perms->audit & AA_AUDIT_DATA))
|
|
aad(&sa)->mnt.data = data;
|
|
aad(&sa)->info = info;
|
|
aad(&sa)->error = error;
|
|
|
|
return aa_audit(audit_type, profile, &sa, audit_cb);
|
|
}
|
|
|
|
/**
|
|
* match_mnt_flags - Do an ordered match on mount flags
|
|
* @dfa: dfa to match against
|
|
* @state: state to start in
|
|
* @flags: mount flags to match against
|
|
*
|
|
* Mount flags are encoded as an ordered match. This is done instead of
|
|
* checking against a simple bitmask, to allow for logical operations
|
|
* on the flags.
|
|
*
|
|
* Returns: next state after flags match
|
|
*/
|
|
static unsigned int match_mnt_flags(struct aa_dfa *dfa, unsigned int state,
|
|
unsigned long flags)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i <= 31 ; ++i) {
|
|
if ((1 << i) & flags)
|
|
state = aa_dfa_next(dfa, state, i + 1);
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
/**
|
|
* compute_mnt_perms - compute mount permission associated with @state
|
|
* @dfa: dfa to match against (NOT NULL)
|
|
* @state: state match finished in
|
|
*
|
|
* Returns: mount permissions
|
|
*/
|
|
static struct file_perms compute_mnt_perms(struct aa_dfa *dfa,
|
|
unsigned int state)
|
|
{
|
|
struct file_perms perms;
|
|
|
|
perms.kill = 0;
|
|
perms.allow = dfa_user_allow(dfa, state);
|
|
perms.audit = dfa_user_audit(dfa, state);
|
|
perms.quiet = dfa_user_quiet(dfa, state);
|
|
perms.xindex = dfa_user_xindex(dfa, state);
|
|
|
|
return perms;
|
|
}
|
|
|
|
static const char *mnt_info_table[] = {
|
|
"match succeeded",
|
|
"failed mntpnt match",
|
|
"failed srcname match",
|
|
"failed type match",
|
|
"failed flags match",
|
|
"failed data match"
|
|
};
|
|
|
|
/*
|
|
* Returns 0 on success else element that match failed in, this is the
|
|
* index into the mnt_info_table above
|
|
*/
|
|
static int do_match_mnt(struct aa_dfa *dfa, unsigned int start,
|
|
const char *mntpnt, const char *devname,
|
|
const char *type, unsigned long flags,
|
|
void *data, bool binary, struct file_perms *perms)
|
|
{
|
|
unsigned int state;
|
|
|
|
state = aa_dfa_match(dfa, start, mntpnt);
|
|
state = aa_dfa_null_transition(dfa, state);
|
|
if (!state)
|
|
return 1;
|
|
|
|
if (devname)
|
|
state = aa_dfa_match(dfa, state, devname);
|
|
state = aa_dfa_null_transition(dfa, state);
|
|
if (!state)
|
|
return 2;
|
|
|
|
if (type)
|
|
state = aa_dfa_match(dfa, state, type);
|
|
state = aa_dfa_null_transition(dfa, state);
|
|
if (!state)
|
|
return 3;
|
|
|
|
state = match_mnt_flags(dfa, state, flags);
|
|
if (!state)
|
|
return 4;
|
|
*perms = compute_mnt_perms(dfa, state);
|
|
if (perms->allow & AA_MAY_MOUNT)
|
|
return 0;
|
|
|
|
/* only match data if not binary and the DFA flags data is expected */
|
|
if (data && !binary && (perms->allow & AA_MNT_CONT_MATCH)) {
|
|
state = aa_dfa_null_transition(dfa, state);
|
|
if (!state)
|
|
return 4;
|
|
|
|
state = aa_dfa_match(dfa, state, data);
|
|
if (!state)
|
|
return 5;
|
|
*perms = compute_mnt_perms(dfa, state);
|
|
if (perms->allow & AA_MAY_MOUNT)
|
|
return 0;
|
|
}
|
|
|
|
/* failed at end of flags match */
|
|
return 4;
|
|
}
|
|
|
|
/**
|
|
* match_mnt - handle path matching for mount
|
|
* @profile: the confining profile
|
|
* @mntpnt: string for the mntpnt (NOT NULL)
|
|
* @devname: string for the devname/src_name (MAYBE NULL)
|
|
* @type: string for the dev type (MAYBE NULL)
|
|
* @flags: mount flags to match
|
|
* @data: fs mount data (MAYBE NULL)
|
|
* @binary: whether @data is binary
|
|
* @perms: Returns: permission found by the match
|
|
* @info: Returns: infomation string about the match for logging
|
|
*
|
|
* Returns: 0 on success else error
|
|
*/
|
|
static int match_mnt(struct aa_profile *profile, const char *mntpnt,
|
|
const char *devname, const char *type,
|
|
unsigned long flags, void *data, bool binary)
|
|
{
|
|
struct file_perms perms = { };
|
|
const char *info = NULL;
|
|
int pos, error = -EACCES;
|
|
|
|
if (!profile->policy.dfa)
|
|
goto audit;
|
|
|
|
pos = do_match_mnt(profile->policy.dfa,
|
|
profile->policy.start[AA_CLASS_MOUNT],
|
|
mntpnt, devname, type, flags, data, binary, &perms);
|
|
if (pos) {
|
|
info = mnt_info_table[pos];
|
|
goto audit;
|
|
}
|
|
error = 0;
|
|
|
|
audit:
|
|
return audit_mount(profile, OP_MOUNT, mntpnt, devname, type, NULL,
|
|
flags, data, AA_MAY_MOUNT, &perms, info, error);
|
|
}
|
|
|
|
static int path_flags(struct aa_profile *profile, struct path *path)
|
|
{
|
|
return profile->path_flags |
|
|
S_ISDIR(path->dentry->d_inode->i_mode) ? PATH_IS_DIR : 0;
|
|
}
|
|
|
|
int aa_remount(struct aa_label *label, struct path *path, unsigned long flags,
|
|
void *data)
|
|
{
|
|
struct aa_profile *profile;
|
|
const char *name, *info = NULL;
|
|
char *buffer = NULL;
|
|
bool binary;
|
|
int error;
|
|
|
|
binary = path->dentry->d_sb->s_type->fs_flags & FS_BINARY_MOUNTDATA;
|
|
|
|
get_buffers(buffer);
|
|
error = aa_path_name(path, path_flags(labels_profile(label), path),
|
|
buffer, &name, &info,
|
|
labels_profile(label)->disconnected);
|
|
if (error) {
|
|
error = audit_mount(labels_profile(label), OP_MOUNT, name, NULL,
|
|
NULL, NULL, flags, data, AA_MAY_MOUNT,
|
|
&nullperms, info, error);
|
|
goto out;
|
|
}
|
|
|
|
error = fn_for_each_confined(label, profile,
|
|
match_mnt(profile, name, NULL, NULL, flags, data,
|
|
binary));
|
|
|
|
out:
|
|
put_buffers(buffer);
|
|
|
|
return error;
|
|
}
|
|
|
|
int aa_bind_mount(struct aa_label *label, struct path *path,
|
|
const char *dev_name, unsigned long flags)
|
|
{
|
|
struct aa_profile *profile;
|
|
char *buffer = NULL, *old_buffer = NULL;
|
|
const char *name, *old_name = NULL, *info = NULL;
|
|
struct path old_path;
|
|
int error;
|
|
|
|
if (!dev_name || !*dev_name)
|
|
return -EINVAL;
|
|
|
|
flags &= MS_REC | MS_BIND;
|
|
|
|
get_buffers(buffer, old_buffer);
|
|
error = aa_path_name(path, path_flags(labels_profile(label), path), buffer, &name,
|
|
&info, labels_profile(label)->disconnected);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = kern_path(dev_name, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &old_path);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = aa_path_name(&old_path, path_flags(labels_profile(label),
|
|
&old_path),
|
|
old_buffer, &old_name, &info,
|
|
labels_profile(label)->disconnected);
|
|
path_put(&old_path);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = fn_for_each_confined(label, profile,
|
|
match_mnt(profile, name, old_name, NULL, flags, NULL,
|
|
false));
|
|
|
|
out:
|
|
put_buffers(buffer, old_buffer);
|
|
|
|
return error;
|
|
|
|
error:
|
|
error = fn_for_each(label, profile,
|
|
audit_mount(profile, OP_MOUNT, name, old_name, NULL,
|
|
NULL, flags, NULL, AA_MAY_MOUNT, &nullperms,
|
|
info, error));
|
|
goto out;
|
|
}
|
|
|
|
int aa_mount_change_type(struct aa_label *label, struct path *path,
|
|
unsigned long flags)
|
|
{
|
|
struct aa_profile *profile;
|
|
char *buffer = NULL;
|
|
const char *name, *info = NULL;
|
|
int error;
|
|
|
|
/* These are the flags allowed by do_change_type() */
|
|
flags &= (MS_REC | MS_SILENT | MS_SHARED | MS_PRIVATE | MS_SLAVE |
|
|
MS_UNBINDABLE);
|
|
|
|
get_buffers(buffer);
|
|
error = aa_path_name(path, path_flags(labels_profile(label), path),
|
|
buffer, &name, &info,
|
|
labels_profile(label)->disconnected);
|
|
if (error) {
|
|
error = fn_for_each(label, profile,
|
|
audit_mount(profile, OP_MOUNT, name, NULL,
|
|
NULL, NULL, flags, NULL,
|
|
AA_MAY_MOUNT, &nullperms, info,
|
|
error));
|
|
goto out;
|
|
}
|
|
|
|
error = fn_for_each_confined(label, profile,
|
|
match_mnt(profile, name, NULL, NULL, flags, NULL,
|
|
false));
|
|
|
|
out:
|
|
put_buffers(buffer);
|
|
|
|
return error;
|
|
}
|
|
|
|
int aa_move_mount(struct aa_label *label, struct path *path,
|
|
const char *orig_name)
|
|
{
|
|
struct aa_profile *profile;
|
|
char *buffer = NULL, *old_buffer = NULL;
|
|
const char *name, *old_name = NULL, *info = NULL;
|
|
struct path old_path;
|
|
int error;
|
|
|
|
if (!orig_name || !*orig_name)
|
|
return -EINVAL;
|
|
|
|
get_buffers(buffer, old_buffer);
|
|
error = aa_path_name(path, path_flags(labels_profile(label), path),
|
|
buffer, &name, &info,
|
|
labels_profile(label)->disconnected);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = kern_path(orig_name, LOOKUP_FOLLOW, &old_path);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = aa_path_name(&old_path, path_flags(labels_profile(label),
|
|
&old_path),
|
|
old_buffer, &old_name, &info,
|
|
labels_profile(label)->disconnected);
|
|
path_put(&old_path);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = fn_for_each_confined(label, profile,
|
|
match_mnt(profile, name, old_name, NULL, MS_MOVE, NULL,
|
|
false));
|
|
|
|
out:
|
|
put_buffers(buffer, old_buffer);
|
|
|
|
return error;
|
|
|
|
error:
|
|
error = fn_for_each(label, profile,
|
|
audit_mount(profile, OP_MOUNT, name, old_name, NULL,
|
|
NULL, MS_MOVE, NULL, AA_MAY_MOUNT,
|
|
&nullperms, info, error));
|
|
goto out;
|
|
}
|
|
|
|
int aa_new_mount(struct aa_label *label, const char *orig_dev_name,
|
|
struct path *path, const char *type, unsigned long flags,
|
|
void *data)
|
|
{
|
|
struct aa_profile *profile;
|
|
char *buffer = NULL, *dev_buffer = NULL;
|
|
const char *name = NULL, *dev_name = NULL, *info = NULL;
|
|
bool binary = true;
|
|
int error;
|
|
|
|
dev_name = orig_dev_name;
|
|
get_buffers(buffer, dev_buffer);
|
|
if (type) {
|
|
int requires_dev;
|
|
struct file_system_type *fstype = get_fs_type(type);
|
|
if (!fstype)
|
|
return -ENODEV;
|
|
|
|
binary = fstype->fs_flags & FS_BINARY_MOUNTDATA;
|
|
requires_dev = fstype->fs_flags & FS_REQUIRES_DEV;
|
|
put_filesystem(fstype);
|
|
|
|
if (requires_dev) {
|
|
struct path dev_path;
|
|
|
|
if (!dev_name || !*dev_name) {
|
|
error = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
error = kern_path(dev_name, LOOKUP_FOLLOW, &dev_path);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = aa_path_name(&dev_path,
|
|
path_flags(labels_profile(label),
|
|
&dev_path),
|
|
dev_buffer, &dev_name, &info,
|
|
labels_profile(label)->disconnected);
|
|
path_put(&dev_path);
|
|
if (error)
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
error = aa_path_name(path, path_flags(labels_profile(label), path),
|
|
buffer, &name, &info,
|
|
labels_profile(label)->disconnected);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = fn_for_each_confined(label, profile,
|
|
match_mnt(profile, name, dev_name, type, flags, data,
|
|
binary));
|
|
|
|
cleanup:
|
|
put_buffers(buffer, dev_buffer);
|
|
|
|
out:
|
|
return error;
|
|
|
|
error:
|
|
error = fn_for_each(label, profile,
|
|
audit_mount(labels_profile(label), OP_MOUNT, name,
|
|
dev_name, type, NULL, flags, data,
|
|
AA_MAY_MOUNT, &nullperms, info, error));
|
|
goto cleanup;
|
|
}
|
|
|
|
static int profile_umount(struct aa_profile *profile, const char *name)
|
|
{
|
|
struct file_perms perms = { };
|
|
const char *info = NULL;
|
|
int e = 0;
|
|
|
|
if (profile->policy.dfa) {
|
|
unsigned int state;
|
|
state = aa_dfa_match(profile->policy.dfa,
|
|
profile->policy.start[AA_CLASS_MOUNT],
|
|
name);
|
|
perms = compute_mnt_perms(profile->policy.dfa, state);
|
|
if (AA_MAY_UMOUNT & ~perms.allow)
|
|
e = -EACCES;
|
|
} else
|
|
e = -EACCES;
|
|
return audit_mount(profile, OP_UMOUNT, name, NULL, NULL, NULL, 0, NULL,
|
|
AA_MAY_UMOUNT, &perms, info, e);
|
|
}
|
|
|
|
int aa_umount(struct aa_label *label, struct vfsmount *mnt, int flags)
|
|
{
|
|
struct aa_profile *profile;
|
|
char *buffer = NULL;
|
|
const char *name, *info = NULL;
|
|
int error;
|
|
|
|
struct path path = { mnt, mnt->mnt_root };
|
|
get_buffers(buffer);
|
|
error = aa_path_name(&path, path_flags(labels_profile(label), &path),
|
|
buffer, &name, &info,
|
|
labels_profile(label)->disconnected);
|
|
if (error) {
|
|
error = fn_for_each(label, profile,
|
|
audit_mount(profile, OP_UMOUNT, name, NULL,
|
|
NULL, NULL, 0, NULL, AA_MAY_UMOUNT,
|
|
&nullperms, info, error));
|
|
goto out;
|
|
}
|
|
|
|
error = fn_for_each_confined(label, profile,
|
|
profile_umount(profile, name));
|
|
|
|
out:
|
|
put_buffers(buffer);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int profile_pivotroot(struct aa_profile *profile, const char *new_name,
|
|
const char *old_name, struct aa_profile **trans)
|
|
{
|
|
struct aa_profile *target = NULL;
|
|
struct file_perms perms = { };
|
|
const char *info = NULL;
|
|
int error = -EACCES;
|
|
|
|
/* TODO: actual domain transition computation for multiple
|
|
* profiles
|
|
*/
|
|
if (profile->policy.dfa) {
|
|
unsigned int state;
|
|
state = aa_dfa_match(profile->policy.dfa,
|
|
profile->policy.start[AA_CLASS_MOUNT],
|
|
new_name);
|
|
state = aa_dfa_null_transition(profile->policy.dfa, state);
|
|
state = aa_dfa_match(profile->policy.dfa, state, old_name);
|
|
perms = compute_mnt_perms(profile->policy.dfa, state);
|
|
|
|
if (AA_MAY_PIVOTROOT & perms.allow) {
|
|
if ((perms.xindex & AA_X_TYPE_MASK) == AA_X_TABLE) {
|
|
target = x_table_lookup(profile, perms.xindex);
|
|
if (!target)
|
|
error = -ENOENT;
|
|
else
|
|
*trans = target;
|
|
} else
|
|
error = 0;
|
|
}
|
|
}
|
|
|
|
error = audit_mount(profile, OP_PIVOTROOT, new_name, old_name,
|
|
NULL, target ? target->base.name : NULL,
|
|
0, NULL, AA_MAY_PIVOTROOT, &perms, info,
|
|
error);
|
|
if (!*trans)
|
|
aa_put_profile(target);
|
|
|
|
return error;
|
|
}
|
|
|
|
int aa_pivotroot(struct aa_label *label, struct path *old_path,
|
|
struct path *new_path)
|
|
{
|
|
struct aa_profile *profile, *target = NULL;
|
|
char *old_buffer = NULL, *new_buffer = NULL;
|
|
const char *old_name, *new_name = NULL, *info = NULL;
|
|
int error;
|
|
|
|
get_buffers(old_buffer, new_buffer);
|
|
error = aa_path_name(old_path, path_flags(labels_profile(label),
|
|
old_path),
|
|
old_buffer, &old_name, &info,
|
|
labels_profile(label)->disconnected);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = aa_path_name(new_path, path_flags(labels_profile(label),
|
|
new_path),
|
|
new_buffer, &new_name, &info,
|
|
labels_profile(label)->disconnected);
|
|
if (error)
|
|
goto error;
|
|
|
|
error = fn_for_each(label, profile,
|
|
profile_pivotroot(profile, new_name, old_name,
|
|
&target));
|
|
out:
|
|
put_buffers(old_buffer, new_buffer);
|
|
|
|
if (target)
|
|
error = aa_replace_current_label(&target->label);
|
|
|
|
return error;
|
|
|
|
error:
|
|
error = fn_for_each(label, profile,
|
|
audit_mount(profile, OP_PIVOTROOT, new_name, old_name,
|
|
NULL, NULL,
|
|
0, NULL, AA_MAY_PIVOTROOT, &nullperms, info,
|
|
error));
|
|
goto out;
|
|
}
|