int aa_may_signal(struct aa_label *sender, struct aa_label *target, int sig)
{
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_SIGNAL);
aad(&sa)->signal = map_signal_num(sig);
return xcheck_labels_profiles(sender, target, aa_signal_cross_perm,
&sa);
}
/**
* aa_may_ptrace - test if tracer task can trace the tracee
* @tracer: label of the task doing the tracing (NOT NULL)
* @tracee: task label to be traced
* @request: permission request
*
* Returns: %0 else error code if permission denied or error
*/
int aa_may_ptrace(struct aa_label *tracer, struct aa_label *tracee,
u32 request)
{
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_PTRACE);
return xcheck_labels_profiles(tracer, tracee, cross_ptrace_perm,
request, &sa);
}
/**
* aa_info_message - log a none profile related status message
* @str: message to log
*/
void aa_info_message(const char *str)
{
if (audit_enabled) {
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, 0);
aad(&sa)->info = str;
aa_audit_msg(AUDIT_APPARMOR_STATUS, &sa, NULL);
}
printk(KERN_INFO "AppArmor: %s\n", str);
}
/**
* audit_resource - audit setting resource limit
* @profile: profile being enforced (NOT NULL)
* @resoure: rlimit being auditing
* @value: value being set
* @error: error value
*
* Returns: 0 or sa->error else other error code on failure
*/
static int audit_resource(struct aa_profile *profile, unsigned int resource,
unsigned long value, int error)
{
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_SETRLIMIT);
aad(&sa)->rlim.rlim = resource;
aad(&sa)->rlim.max = value;
aad(&sa)->error = error;
return aa_audit(AUDIT_APPARMOR_AUTO, profile, &sa, audit_cb);
}
int aa_may_signal(struct aa_label *sender, struct aa_label *target, int sig)
{
struct aa_profile *profile;
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_SIGNAL);
aad(&sa)->signal = map_signal_num(sig);
aad(&sa)->unmappedsig = sig;
return xcheck_labels(sender, target, profile,
profile_signal_perm(profile, target, MAY_WRITE, &sa),
profile_signal_perm(profile, sender, MAY_READ, &sa));
}
/**
* aa_may_ptrace - test if tracer task can trace the tracee
* @tracer: label of the task doing the tracing (NOT NULL)
* @tracee: task label to be traced
* @request: permission request
*
* Returns: %0 else error code if permission denied or error
*/
int aa_may_ptrace(struct aa_label *tracer, struct aa_label *tracee,
u32 request)
{
struct aa_profile *profile;
u32 xrequest = request << PTRACE_PERM_SHIFT;
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_PTRACE);
return xcheck_labels(tracer, tracee, profile,
profile_tracer_perm(profile, tracee, request, &sa),
profile_tracee_perm(profile, tracer, xrequest, &sa));
}
/**
* aa_capable - test permission to use capability
* @label: label being tested for capability (NOT NULL)
* @cap: capability to be tested
* @audit: whether an audit record should be generated
*
* Look up capability in profile capability set.
*
* Returns: 0 on success, or else an error code.
*/
int aa_capable(struct aa_label *label, int cap, int audit)
{
struct aa_profile *profile;
int error = 0;
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_CAP, OP_CAPABLE);
sa.u.cap = cap;
error = fn_for_each_confined(label, profile,
profile_capable(profile, cap, audit ? &sa : NULL));
return error;
}
/**
* aa_capable - test permission to use capability
* @label: label being tested for capability (NOT NULL)
* @cap: capability to be tested
* @opts: CAP_OPT_NOAUDIT bit determines whether audit record is generated
*
* Look up capability in profile capability set.
*
* Returns: 0 on success, or else an error code.
*/
int aa_capable(struct aa_label *label, int cap, unsigned int opts)
{
struct aa_profile *profile;
int error = 0;
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_CAP, OP_CAPABLE);
sa.u.cap = cap;
error = fn_for_each_confined(label, profile,
profile_capable(profile, cap, opts, &sa));
return error;
}
/**
* aa_audit_file - handle the auditing of file operations
* @profile: the profile being enforced (NOT NULL)
* @perms: the permissions computed for the request (NOT NULL)
* @op: operation being mediated
* @request: permissions requested
* @name: name of object being mediated (MAYBE NULL)
* @target: name of target (MAYBE NULL)
* @tlabel: target label (MAY BE NULL)
* @ouid: object uid
* @info: extra information message (MAYBE NULL)
* @error: 0 if operation allowed else failure error code
*
* Returns: %0 or error on failure
*/
int aa_audit_file(struct aa_profile *profile, struct aa_perms *perms,
const char *op, u32 request, const char *name,
const char *target, struct aa_label *tlabel,
kuid_t ouid, const char *info, int error)
{
int type = AUDIT_APPARMOR_AUTO;
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_TASK, op);
sa.u.tsk = NULL;
aad(&sa)->request = request;
aad(&sa)->name = name;
aad(&sa)->fs.target = target;
aad(&sa)->peer = tlabel;
aad(&sa)->fs.ouid = ouid;
aad(&sa)->info = info;
aad(&sa)->error = error;
sa.u.tsk = NULL;
if (likely(!aad(&sa)->error)) {
u32 mask = perms->audit;
if (unlikely(AUDIT_MODE(profile) == AUDIT_ALL))
mask = 0xffff;
/* mask off perms that are not being force audited */
aad(&sa)->request &= mask;
if (likely(!aad(&sa)->request))
return 0;
type = AUDIT_APPARMOR_AUDIT;
} else {
/* only report permissions that were denied */
aad(&sa)->request = aad(&sa)->request & ~perms->allow;
AA_BUG(!aad(&sa)->request);
if (aad(&sa)->request & perms->kill)
type = AUDIT_APPARMOR_KILL;
/* quiet known rejects, assumes quiet and kill do not overlap */
if ((aad(&sa)->request & perms->quiet) &&
AUDIT_MODE(profile) != AUDIT_NOQUIET &&
AUDIT_MODE(profile) != AUDIT_ALL)
aad(&sa)->request &= ~perms->quiet;
if (!aad(&sa)->request)
return aad(&sa)->error;
}
aad(&sa)->denied = aad(&sa)->request & ~perms->allow;
return aa_audit(type, profile, &sa, file_audit_cb);
}
/**
* 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 independent 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, const char *op,
const char *name, const char *src_name,
const char *type, const char *trans,
unsigned long flags, const void *data, u32 request,
struct aa_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 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);
}