"HINT",
"STATUS",
"ERROR",
- "KILLED"
+ "KILLED",
"AUTO"
};
aa_get_profile(new->onexec);
}
+/**
+ * aa_get_task_profile - Get another task's profile
+ * @task: task to query (NOT NULL)
+ *
+ * Returns: counted reference to @task's profile
+ */
+struct aa_profile *aa_get_task_profile(struct task_struct *task)
+{
+ struct aa_profile *p;
+
+ rcu_read_lock();
+ p = aa_get_profile(__aa_task_profile(task));
+ rcu_read_unlock();
+
+ return p;
+}
+
/**
* aa_replace_current_profile - replace the current tasks profiles
* @profile: new profile (NOT NULL)
*/
int aa_replace_current_profile(struct aa_profile *profile)
{
- struct aa_task_cxt *cxt = current_cred()->security;
+ struct aa_task_cxt *cxt = current_cxt();
struct cred *new;
BUG_ON(!profile);
if (!new)
return -ENOMEM;
- cxt = new->security;
- if (unconfined(profile) || (cxt->profile->ns != profile->ns)) {
+ cxt = cred_cxt(new);
+ if (unconfined(profile) || (cxt->profile->ns != profile->ns))
/* if switching to unconfined or a different profile namespace
* clear out context state
*/
- aa_put_profile(cxt->previous);
- aa_put_profile(cxt->onexec);
- cxt->previous = NULL;
- cxt->onexec = NULL;
- cxt->token = 0;
- }
+ 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
if (!new)
return -ENOMEM;
- cxt = new->security;
+ cxt = cred_cxt(new);
aa_get_profile(profile);
aa_put_profile(cxt->onexec);
cxt->onexec = profile;
return -ENOMEM;
BUG_ON(!profile);
- cxt = new->security;
+ cxt = cred_cxt(new);
if (!cxt->previous) {
/* transfer refcount */
cxt->previous = cxt->profile;
if (!new)
return -ENOMEM;
- cxt = new->security;
+ cxt = cred_cxt(new);
if (cxt->token != token) {
abort_creds(new);
return -EACCES;
aa_get_profile(cxt->profile);
aa_put_profile(cxt->previous);
}
- /* clear exec && prev information when restoring to previous context */
+ /* ref has been transfered so avoid putting ref in clear_task_cxt */
cxt->previous = NULL;
- cxt->token = 0;
- aa_put_profile(cxt->onexec);
- cxt->onexec = NULL;
+ /* clear exec && prev information when restoring to previous context */
+ aa_clear_task_cxt_trans(cxt);
commit_creds(new);
return 0;
struct aa_profile *to_profile)
{
struct task_struct *tracer;
- const struct cred *cred = NULL;
struct aa_profile *tracerp = NULL;
int error = 0;
rcu_read_lock();
tracer = ptrace_parent(task);
- if (tracer) {
+ if (tracer)
/* released below */
- cred = get_task_cred(tracer);
- tracerp = aa_cred_profile(cred);
- }
+ tracerp = aa_get_task_profile(tracer);
/* not ptraced */
if (!tracer || unconfined(tracerp))
out:
rcu_read_unlock();
- if (cred)
- put_cred(cred);
+ aa_put_profile(tracerp);
return error;
}
if (bprm->cred_prepared)
return 0;
- cxt = bprm->cred->security;
+ cxt = cred_cxt(bprm->cred);
BUG_ON(!cxt);
profile = aa_get_profile(aa_newest_version(cxt->profile));
} else {
error = -ENOENT;
info = "profile not found";
+ /* remove MAY_EXEC to audit as failure */
+ perms.allow &= ~MAY_EXEC;
}
}
} else if (COMPLAIN_MODE(profile)) {
cxt->profile = new_profile;
/* clear out all temporary/transitional state from the context */
- aa_put_profile(cxt->previous);
- aa_put_profile(cxt->onexec);
- cxt->previous = NULL;
- cxt->onexec = NULL;
- cxt->token = 0;
+ aa_clear_task_cxt_trans(cxt);
audit:
error = aa_audit_file(profile, &perms, GFP_KERNEL, OP_EXEC, MAY_EXEC,
void apparmor_bprm_committing_creds(struct linux_binprm *bprm)
{
struct aa_profile *profile = __aa_current_profile();
- struct aa_task_cxt *new_cxt = bprm->cred->security;
+ struct aa_task_cxt *new_cxt = cred_cxt(bprm->cred);
/* bail out if unconfined or not changing profile */
if ((new_cxt->profile == profile) ||
/* released below */
cred = get_current_cred();
- cxt = cred->security;
+ cxt = cred_cxt(cred);
profile = aa_cred_profile(cred);
previous_profile = cxt->previous;
bool permtest)
{
const struct cred *cred;
- struct aa_task_cxt *cxt;
struct aa_profile *profile, *target = NULL;
struct aa_namespace *ns = NULL;
struct file_perms perms = {};
}
cred = get_current_cred();
- cxt = cred->security;
profile = aa_cred_profile(cred);
/*
#ifndef __APPARMOR_H
#define __APPARMOR_H
+#include <linux/slab.h>
#include <linux/fs.h>
#include "match.h"
/* fn's in lib */
char *aa_split_fqname(char *args, char **ns_name);
void aa_info_message(const char *str);
-void *kvmalloc(size_t size);
+void *__aa_kvmalloc(size_t size, gfp_t flags);
void kvfree(void *buffer);
+static inline void *kvmalloc(size_t size)
+{
+ return __aa_kvmalloc(size, 0);
+}
+
+static inline void *kvzalloc(size_t size)
+{
+ return __aa_kvmalloc(size, __GFP_ZERO);
+}
/**
* aa_strneq - compare null terminated @str to a non null terminated substring
#include "policy.h"
+#define cred_cxt(X) (X)->security
+#define current_cxt() cred_cxt(current_cred())
+
/* struct aa_file_cxt - the AppArmor context the file was opened in
* @perms: the permission the file was opened with
*
int aa_set_current_onexec(struct aa_profile *profile);
int aa_set_current_hat(struct aa_profile *profile, u64 token);
int aa_restore_previous_profile(u64 cookie);
+struct aa_profile *aa_get_task_profile(struct task_struct *task);
-/**
- * __aa_task_is_confined - determine if @task has any confinement
- * @task: task to check confinement of (NOT NULL)
- *
- * If @task != current needs to be called in RCU safe critical section
- */
-static inline bool __aa_task_is_confined(struct task_struct *task)
-{
- struct aa_task_cxt *cxt = __task_cred(task)->security;
-
- BUG_ON(!cxt || !cxt->profile);
- if (unconfined(aa_newest_version(cxt->profile)))
- return 0;
-
- return 1;
-}
/**
* aa_cred_profile - obtain cred's profiles
*/
static inline struct aa_profile *aa_cred_profile(const struct cred *cred)
{
- struct aa_task_cxt *cxt = cred->security;
+ struct aa_task_cxt *cxt = cred_cxt(cred);
BUG_ON(!cxt || !cxt->profile);
return aa_newest_version(cxt->profile);
}
+/**
+ * __aa_task_profile - retrieve another task's profile
+ * @task: task to query (NOT NULL)
+ *
+ * Returns: @task's profile without incrementing its ref count
+ *
+ * If @task != current needs to be called in RCU safe critical section
+ */
+static inline struct aa_profile *__aa_task_profile(struct task_struct *task)
+{
+ return aa_cred_profile(__task_cred(task));
+}
+
+/**
+ * __aa_task_is_confined - determine if @task has any confinement
+ * @task: task to check confinement of (NOT NULL)
+ *
+ * If @task != current needs to be called in RCU safe critical section
+ */
+static inline bool __aa_task_is_confined(struct task_struct *task)
+{
+ return !unconfined(__aa_task_profile(task));
+}
+
/**
* __aa_current_profile - find the current tasks confining profile
*
*/
static inline struct aa_profile *aa_current_profile(void)
{
- const struct aa_task_cxt *cxt = current_cred()->security;
+ const struct aa_task_cxt *cxt = current_cxt();
struct aa_profile *profile;
BUG_ON(!cxt || !cxt->profile);
return profile;
}
+/**
+ * aa_clear_task_cxt_trans - clear transition tracking info from the cxt
+ * @cxt: task context to clear (NOT NULL)
+ */
+static inline void aa_clear_task_cxt_trans(struct aa_task_cxt *cxt)
+{
+ aa_put_profile(cxt->previous);
+ aa_put_profile(cxt->onexec);
+ cxt->previous = NULL;
+ cxt->onexec = NULL;
+ cxt->token = 0;
+}
+
#endif /* __AA_CONTEXT_H */
aa_free_domain_entries(&rules->trans);
}
-#define ACC_FMODE(x) (("\000\004\002\006"[(x)&O_ACCMODE]) | (((x) << 1) & 0x40))
-
-/* from namei.c */
-#define MAP_OPEN_FLAGS(x) ((((x) + 1) & O_ACCMODE) ? (x) + 1 : (x))
-
/**
* aa_map_file_perms - map file flags to AppArmor permissions
* @file: open file to map flags to AppArmor permissions
*/
static inline u32 aa_map_file_to_perms(struct file *file)
{
- int flags = MAP_OPEN_FLAGS(file->f_flags);
- u32 perms = ACC_FMODE(file->f_mode);
+ int flags = file->f_flags;
+ u32 perms = 0;
+
+ if (file->f_mode & FMODE_WRITE)
+ perms |= MAY_WRITE;
+ if (file->f_mode & FMODE_READ)
+ perms |= MAY_READ;
if ((flags & O_APPEND) && (perms & MAY_WRITE))
perms = (perms & ~MAY_WRITE) | MAY_APPEND;
* This file contains AppArmor policy dfa matching engine definitions.
*
* Copyright (C) 1998-2008 Novell/SUSE
- * Copyright 2009-2010 Canonical Ltd.
+ * 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
#define __AA_MATCH_H
#include <linux/kref.h>
-#include <linux/workqueue.h>
#define DFA_NOMATCH 0
#define DFA_START 1
-#define DFA_VALID_PERM_MASK 0xffffffff
-#define DFA_VALID_PERM2_MASK 0xffffffff
/**
* The format used for transition tables is based on the GNU flex table
* file format (--tables-file option; see Table File Format in the flex
* info pages and the flex sources for documentation). The magic number
* used in the header is 0x1B5E783D instead of 0xF13C57B1 though, because
- * the YY_ID_CHK (check) and YY_ID_DEF (default) tables are used
- * slightly differently (see the apparmor-parser package).
+ * new tables have been defined and others YY_ID_CHK (check) and YY_ID_DEF
+ * (default) tables are used slightly differently (see the apparmor-parser
+ * package).
+ *
+ *
+ * The data in the packed dfa is stored in network byte order, and the tables
+ * are arranged for flexibility. We convert the table data to host native
+ * byte order.
+ *
+ * The dfa begins with a table set header, and is followed by the actual
+ * tables.
*/
#define YYTH_MAGIC 0x1B5E783D
-#define YYTH_DEF_RECURSE 0x1 /* DEF Table is recursive */
struct table_set_header {
u32 th_magic; /* YYTH_MAGIC */
#define YYTD_DATA32 4
#define YYTD_DATA64 8
-/* Each ACCEPT2 table gets 6 dedicated flags, YYTD_DATAX define the
+/* ACCEPT & ACCEPT2 tables gets 6 dedicated flags, YYTD_DATAX define the
* first flags
*/
#define ACCEPT1_FLAGS(X) ((X) & 0x3f)
extern const char *const profile_mode_names[];
#define APPARMOR_NAMES_MAX_INDEX 3
-#define COMPLAIN_MODE(_profile) \
- ((aa_g_profile_mode == APPARMOR_COMPLAIN) || \
- ((_profile)->mode == APPARMOR_COMPLAIN))
+#define PROFILE_MODE(_profile, _mode) \
+ ((aa_g_profile_mode == (_mode)) || \
+ ((_profile)->mode == (_mode)))
-#define KILL_MODE(_profile) \
- ((aa_g_profile_mode == APPARMOR_KILL) || \
- ((_profile)->mode == APPARMOR_KILL))
+#define COMPLAIN_MODE(_profile) PROFILE_MODE((_profile), APPARMOR_COMPLAIN)
+
+#define KILL_MODE(_profile) PROFILE_MODE((_profile), APPARMOR_KILL)
#define PROFILE_IS_HAT(_profile) ((_profile)->flags & PFLAG_HAT)
* @acct: accounting for the namespace
* @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
*
* 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
struct aa_ns_acct acct;
struct aa_profile *unconfined;
struct list_head sub_ns;
+ atomic_t uniq_null;
};
/* struct aa_policydb - match engine for a policy
* @rename: optional profile name that this profile renamed
* @xmatch: optional extended matching for unconfined executables names
* @xmatch_len: xmatch prefix len, used to determine xmatch priority
- * @sid: the unique security id number of this profile
* @audit: the auditing mode of the profile
* @mode: the enforcement mode of the profile
* @flags: flags controlling profile behavior
struct aa_dfa *xmatch;
int xmatch_len;
- u32 sid;
enum audit_mode audit;
enum profile_mode mode;
u32 flags;
int aa_getprocattr(struct aa_profile *profile, char **string);
int aa_setprocattr_changehat(char *args, size_t size, int test);
int aa_setprocattr_changeprofile(char *fqname, bool onexec, int test);
-int aa_setprocattr_permipc(char *fqname);
#endif /* __AA_PROCATTR_H */
#include <linux/types.h>
-struct aa_profile;
+/* sid value that will not be allocated */
+#define AA_SID_INVALID 0
+#define AA_SID_ALLOC AA_SID_INVALID
u32 aa_alloc_sid(void);
void aa_free_sid(u32 sid);
* - tracer profile has CAP_SYS_PTRACE
*/
- struct aa_profile *tracer_p;
- /* cred released below */
- const struct cred *cred = get_task_cred(tracer);
+ struct aa_profile *tracer_p = aa_get_task_profile(tracer);
int error = 0;
- tracer_p = aa_cred_profile(cred);
if (!unconfined(tracer_p)) {
- /* lcred released below */
- const struct cred *lcred = get_task_cred(tracee);
- struct aa_profile *tracee_p = aa_cred_profile(lcred);
+ struct aa_profile *tracee_p = aa_get_task_profile(tracee);
error = aa_may_ptrace(tracer, tracer_p, tracee_p, mode);
error = aa_audit_ptrace(tracer_p, tracee_p, error);
- put_cred(lcred);
+ aa_put_profile(tracee_p);
}
- put_cred(cred);
+ aa_put_profile(tracer_p);
return error;
}
*ns_name = skip_spaces(&name[1]);
if (split) {
/* overwrite ':' with \0 */
- *split = 0;
- name = skip_spaces(split + 1);
+ *split++ = 0;
+ if (strncmp(split, "//", 2) == 0)
+ split += 2;
+ name = skip_spaces(split);
} else
/* a ns name without a following profile is allowed */
name = NULL;
}
/**
- * kvmalloc - do allocation preferring kmalloc but falling back to vmalloc
- * @size: size of allocation
+ * __aa_kvmalloc - do allocation preferring kmalloc but falling back to vmalloc
+ * @size: how many bytes of memory are required
+ * @flags: the type of memory to allocate (see kmalloc).
*
* Return: allocated buffer or NULL if failed
*
* It is possible that policy being loaded from the user is larger than
* what can be allocated by kmalloc, in those cases fall back to vmalloc.
*/
-void *kvmalloc(size_t size)
+void *__aa_kvmalloc(size_t size, gfp_t flags)
{
void *buffer = NULL;
/* do not attempt kmalloc if we need more than 16 pages at once */
if (size <= (16*PAGE_SIZE))
- buffer = kmalloc(size, GFP_NOIO | __GFP_NOWARN);
+ 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);
- buffer = vmalloc(size);
+ if (flags & __GFP_ZERO)
+ buffer = vzalloc(size);
+ else
+ buffer = vmalloc(size);
}
return buffer;
}
*/
static void apparmor_cred_free(struct cred *cred)
{
- aa_free_task_context(cred->security);
- cred->security = NULL;
+ aa_free_task_context(cred_cxt(cred));
+ cred_cxt(cred) = NULL;
}
/*
if (!cxt)
return -ENOMEM;
- cred->security = cxt;
+ cred_cxt(cred) = cxt;
return 0;
}
if (!cxt)
return -ENOMEM;
- aa_dup_task_context(cxt, old->security);
- new->security = cxt;
+ aa_dup_task_context(cxt, cred_cxt(old));
+ cred_cxt(new) = cxt;
return 0;
}
*/
static void apparmor_cred_transfer(struct cred *new, const struct cred *old)
{
- const struct aa_task_cxt *old_cxt = old->security;
- struct aa_task_cxt *new_cxt = new->security;
+ const struct aa_task_cxt *old_cxt = cred_cxt(old);
+ struct aa_task_cxt *new_cxt = cred_cxt(new);
aa_dup_task_context(new_cxt, old_cxt);
}
static int common_mmap(int op, struct file *file, unsigned long prot,
unsigned long flags)
{
- struct dentry *dentry;
int mask = 0;
if (!file || !file->f_security)
if (prot & PROT_EXEC)
mask |= AA_EXEC_MMAP;
- dentry = file->f_path.dentry;
return common_file_perm(op, file, mask);
}
char **value)
{
int error = -ENOENT;
- struct aa_profile *profile;
/* released below */
const struct cred *cred = get_task_cred(task);
- struct aa_task_cxt *cxt = cred->security;
- profile = aa_cred_profile(cred);
+ struct aa_task_cxt *cxt = cred_cxt(cred);
if (strcmp(name, "current") == 0)
error = aa_getprocattr(aa_newest_version(cxt->profile),
static int apparmor_setprocattr(struct task_struct *task, char *name,
void *value, size_t size)
{
+ struct common_audit_data sa;
+ struct apparmor_audit_data aad = {0,};
char *command, *args = value;
size_t arg_size;
int error;
} else if (strcmp(command, "permprofile") == 0) {
error = aa_setprocattr_changeprofile(args, !AA_ONEXEC,
AA_DO_TEST);
- } else if (strcmp(command, "permipc") == 0) {
- error = aa_setprocattr_permipc(args);
- } else {
- struct common_audit_data sa;
- struct apparmor_audit_data aad = {0,};
- sa.type = LSM_AUDIT_DATA_NONE;
- sa.aad = &aad;
- aad.op = OP_SETPROCATTR;
- aad.info = name;
- aad.error = -EINVAL;
- return aa_audit(AUDIT_APPARMOR_DENIED,
- __aa_current_profile(), GFP_KERNEL,
- &sa, NULL);
- }
+ } else
+ goto fail;
} else if (strcmp(name, "exec") == 0) {
- error = aa_setprocattr_changeprofile(args, AA_ONEXEC,
- !AA_DO_TEST);
- } else {
+ if (strcmp(command, "exec") == 0)
+ error = aa_setprocattr_changeprofile(args, AA_ONEXEC,
+ !AA_DO_TEST);
+ else
+ goto fail;
+ } else
/* only support the "current" and "exec" process attributes */
return -EINVAL;
- }
+
if (!error)
error = size;
return error;
+
+fail:
+ sa.type = LSM_AUDIT_DATA_NONE;
+ sa.aad = &aad;
+ aad.profile = aa_current_profile();
+ aad.op = OP_SETPROCATTR;
+ aad.info = name;
+ aad.error = -EINVAL;
+ aa_audit_msg(AUDIT_APPARMOR_DENIED, &sa, NULL);
+ return -EINVAL;
}
static int apparmor_task_setrlimit(struct task_struct *task,
return -ENOMEM;
cxt->profile = aa_get_profile(root_ns->unconfined);
- cred->security = cxt;
+ cred_cxt(cred) = cxt;
return 0;
}
error = register_security(&apparmor_ops);
if (error) {
+ struct cred *cred = (struct cred *)current->real_cred;
+ aa_free_task_context(cred_cxt(cred));
+ cred_cxt(cred) = NULL;
AA_ERROR("Unable to register AppArmor\n");
- goto set_init_cxt_out;
+ goto register_security_out;
}
/* Report that AppArmor successfully initialized */
return error;
-set_init_cxt_out:
- aa_free_task_context(current->real_cred->security);
-
register_security_out:
aa_free_root_ns();
* This file contains AppArmor dfa based regular expression matching engine
*
* Copyright (C) 1998-2008 Novell/SUSE
- * Copyright 2009-2010 Canonical Ltd.
+ * 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
#include "include/apparmor.h"
#include "include/match.h"
+#define base_idx(X) ((X) & 0xffffff)
+
/**
* unpack_table - unpack a dfa table (one of accept, default, base, next check)
* @blob: data to unpack (NOT NULL)
*
* Returns: pointer to table else NULL on failure
*
- * NOTE: must be freed by kvfree (not kmalloc)
+ * NOTE: must be freed by kvfree (not kfree)
*/
static struct table_header *unpack_table(char *blob, size_t bsize)
{
if (bsize < tsize)
goto out;
- table = kvmalloc(tsize);
+ table = kvzalloc(tsize);
if (table) {
*table = th;
if (th.td_flags == YYTD_DATA8)
for (i = 0; i < state_count; i++) {
if (DEFAULT_TABLE(dfa)[i] >= state_count)
goto out;
- /* TODO: do check that DEF state recursion terminates */
- if (BASE_TABLE(dfa)[i] + 255 >= trans_count) {
+ if (base_idx(BASE_TABLE(dfa)[i]) + 255 >= trans_count) {
printk(KERN_ERR "AppArmor DFA next/check upper "
"bounds error\n");
goto out;
u8 *equiv = EQUIV_TABLE(dfa);
/* default is direct to next state */
for (; len; len--) {
- pos = base[state] + equiv[(u8) *str++];
+ pos = base_idx(base[state]) + equiv[(u8) *str++];
if (check[pos] == state)
state = next[pos];
else
} else {
/* default is direct to next state */
for (; len; len--) {
- pos = base[state] + (u8) *str++;
+ pos = base_idx(base[state]) + (u8) *str++;
if (check[pos] == state)
state = next[pos];
else
u8 *equiv = EQUIV_TABLE(dfa);
/* default is direct to next state */
while (*str) {
- pos = base[state] + equiv[(u8) *str++];
+ pos = base_idx(base[state]) + equiv[(u8) *str++];
if (check[pos] == state)
state = next[pos];
else
} else {
/* default is direct to next state */
while (*str) {
- pos = base[state] + (u8) *str++;
+ pos = base_idx(base[state]) + (u8) *str++;
if (check[pos] == state)
state = next[pos];
else
u8 *equiv = EQUIV_TABLE(dfa);
/* default is direct to next state */
- pos = base[state] + equiv[(u8) c];
+ pos = base_idx(base[state]) + equiv[(u8) c];
if (check[pos] == state)
state = next[pos];
else
state = def[state];
} else {
/* default is direct to next state */
- pos = base[state] + (u8) c;
+ pos = base_idx(base[state]) + (u8) c;
if (check[pos] == state)
state = next[pos];
else
if (info && error) {
if (error == -ENOENT)
*info = "Failed name lookup - deleted entry";
- else if (error == -ESTALE)
+ else if (error == -EACCES)
*info = "Failed name lookup - disconnected path";
else if (error == -ENAMETOOLONG)
*info = "Failed name lookup - name too long";
#include "include/policy.h"
#include "include/policy_unpack.h"
#include "include/resource.h"
-#include "include/sid.h"
/* root profile namespace */
if (!ns->unconfined)
goto fail_unconfined;
- ns->unconfined->sid = aa_alloc_sid();
ns->unconfined->flags = PFLAG_UNCONFINED | PFLAG_IX_ON_NAME_ERROR |
PFLAG_IMMUTABLE;
*/
ns->unconfined->ns = aa_get_namespace(ns);
+ atomic_set(&ns->uniq_null, 0);
+
return ns;
fail_unconfined:
/* released when @new is freed */
new->parent = aa_get_profile(old->parent);
new->ns = aa_get_namespace(old->ns);
- new->sid = old->sid;
__list_add_profile(&policy->profiles, new);
/* inherit children */
list_for_each_entry_safe(child, tmp, &old->base.profiles, base.list) {
aa_put_namespace(ns);
}
-/**
- * aa_alloc_profile - allocate, initialize and return a new profile
- * @hname: name of the profile (NOT NULL)
- *
- * Returns: refcount profile or NULL on failure
- */
-struct aa_profile *aa_alloc_profile(const char *hname)
-{
- struct aa_profile *profile;
-
- /* freed by free_profile - usually through aa_put_profile */
- profile = kzalloc(sizeof(*profile), GFP_KERNEL);
- if (!profile)
- return NULL;
-
- if (!policy_init(&profile->base, NULL, hname)) {
- kzfree(profile);
- return NULL;
- }
-
- /* refcount released by caller */
- return profile;
-}
-
-/**
- * aa_new_null_profile - create a new null-X learning profile
- * @parent: profile that caused this profile to be created (NOT NULL)
- * @hat: true if the null- learning profile is a hat
- *
- * Create a null- complain mode profile used in learning mode. The name of
- * the profile is unique and follows the format of parent//null-sid.
- *
- * null profiles are added to the profile list but the list does not
- * hold a count on them so that they are automatically released when
- * not in use.
- *
- * Returns: new refcounted profile else NULL on failure
- */
-struct aa_profile *aa_new_null_profile(struct aa_profile *parent, int hat)
-{
- struct aa_profile *profile = NULL;
- char *name;
- u32 sid = aa_alloc_sid();
-
- /* freed below */
- name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, GFP_KERNEL);
- if (!name)
- goto fail;
- sprintf(name, "%s//null-%x", parent->base.hname, sid);
-
- profile = aa_alloc_profile(name);
- kfree(name);
- if (!profile)
- goto fail;
-
- profile->sid = sid;
- profile->mode = APPARMOR_COMPLAIN;
- profile->flags = PFLAG_NULL;
- if (hat)
- profile->flags |= PFLAG_HAT;
-
- /* released on free_profile */
- profile->parent = aa_get_profile(parent);
- profile->ns = aa_get_namespace(parent->ns);
-
- write_lock(&profile->ns->lock);
- __list_add_profile(&parent->base.profiles, profile);
- write_unlock(&profile->ns->lock);
-
- /* refcount released by caller */
- return profile;
-
-fail:
- aa_free_sid(sid);
- return NULL;
-}
-
/**
* free_profile - free a profile
* @profile: the profile to free (MAYBE NULL)
aa_free_cap_rules(&profile->caps);
aa_free_rlimit_rules(&profile->rlimits);
- aa_free_sid(profile->sid);
aa_put_dfa(profile->xmatch);
aa_put_dfa(profile->policy.dfa);
free_profile(p);
}
+/**
+ * aa_alloc_profile - allocate, initialize and return a new profile
+ * @hname: name of the profile (NOT NULL)
+ *
+ * Returns: refcount profile or NULL on failure
+ */
+struct aa_profile *aa_alloc_profile(const char *hname)
+{
+ struct aa_profile *profile;
+
+ /* freed by free_profile - usually through aa_put_profile */
+ profile = kzalloc(sizeof(*profile), GFP_KERNEL);
+ if (!profile)
+ return NULL;
+
+ if (!policy_init(&profile->base, NULL, hname)) {
+ kzfree(profile);
+ return NULL;
+ }
+
+ /* refcount released by caller */
+ return profile;
+}
+
+/**
+ * aa_new_null_profile - create a new null-X learning profile
+ * @parent: profile that caused this profile to be created (NOT NULL)
+ * @hat: true if the null- learning profile is a hat
+ *
+ * Create a null- complain mode profile used in learning mode. The name of
+ * the profile is unique and follows the format of parent//null-<uniq>.
+ *
+ * null profiles are added to the profile list but the list does not
+ * hold a count on them so that they are automatically released when
+ * not in use.
+ *
+ * Returns: new refcounted profile else NULL on failure
+ */
+struct aa_profile *aa_new_null_profile(struct aa_profile *parent, int hat)
+{
+ struct aa_profile *profile = NULL;
+ char *name;
+ int uniq = atomic_inc_return(&parent->ns->uniq_null);
+
+ /* freed below */
+ name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, GFP_KERNEL);
+ if (!name)
+ goto fail;
+ sprintf(name, "%s//null-%x", parent->base.hname, uniq);
+
+ profile = aa_alloc_profile(name);
+ kfree(name);
+ if (!profile)
+ goto fail;
+
+ profile->mode = APPARMOR_COMPLAIN;
+ profile->flags = PFLAG_NULL;
+ if (hat)
+ profile->flags |= PFLAG_HAT;
+
+ /* released on free_profile */
+ profile->parent = aa_get_profile(parent);
+ profile->ns = aa_get_namespace(parent->ns);
+
+ write_lock(&profile->ns->lock);
+ __list_add_profile(&parent->base.profiles, profile);
+ write_unlock(&profile->ns->lock);
+
+ /* refcount released by caller */
+ return profile;
+
+fail:
+ return NULL;
+}
+
/* TODO: profile accounting - setup in remove */
/**
profile->parent = aa_get_profile((struct aa_profile *) policy);
__list_add_profile(&policy->profiles, profile);
/* released on free_profile */
- profile->sid = aa_alloc_sid();
profile->ns = aa_get_namespace(ns);
}
if (!error) {
if (rename_profile)
__replace_profile(rename_profile, new_profile);
- if (old_profile) {
- /* when there are both rename and old profiles
- * inherit old profiles sid
- */
- if (rename_profile)
- aa_free_sid(new_profile->sid);
+ if (old_profile)
__replace_profile(old_profile, new_profile);
- }
if (!(old_profile || rename_profile))
__add_new_profile(ns, policy, new_profile);
}
if (fqname[0] == ':') {
char *ns_name;
name = aa_split_fqname(fqname, &ns_name);
- if (ns_name) {
- /* released below */
- ns = aa_find_namespace(root, ns_name);
- if (!ns) {
- info = "namespace does not exist";
- error = -ENOENT;
- goto fail;
- }
+ /* released below */
+ ns = aa_find_namespace(root, ns_name);
+ if (!ns) {
+ info = "namespace does not exist";
+ error = -ENOENT;
+ goto fail;
}
} else
/* released below */
#include "include/match.h"
#include "include/policy.h"
#include "include/policy_unpack.h"
-#include "include/sid.h"
/*
* The AppArmor interface treats data as a type byte followed by the
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)
name = aa_split_fqname(fqname, &ns_name);
return aa_change_profile(ns_name, name, onexec, test);
}
-
-int aa_setprocattr_permipc(char *fqname)
-{
- /* TODO: add ipc permission querying */
- return -ENOTSUPP;
-}
#include <linux/audit.h>
#include "include/audit.h"
+#include "include/context.h"
#include "include/resource.h"
#include "include/policy.h"
int aa_task_setrlimit(struct aa_profile *profile, struct task_struct *task,
unsigned int resource, struct rlimit *new_rlim)
{
+ struct aa_profile *task_profile;
int error = 0;
+ rcu_read_lock();
+ task_profile = aa_get_profile(aa_cred_profile(__task_cred(task)));
+ rcu_read_unlock();
+
/* TODO: extend resource control to handle other (non current)
- * processes. AppArmor rules currently have the implicit assumption
- * that the task is setting the resource of the current process
+ * profiles. AppArmor rules currently have the implicit assumption
+ * that the task is setting the resource of a task confined with
+ * the same profile.
*/
- if ((task != current->group_leader) ||
+ if (profile != task_profile ||
(profile->rlimits.mask & (1 << resource) &&
new_rlim->rlim_max > profile->rlimits.limits[resource].rlim_max))
error = -EACCES;
+ aa_put_profile(task_profile);
+
return audit_resource(profile, resource, new_rlim->rlim_max, error);
}
projects / firefly-linux-kernel-4.4.55.git / commitdiff