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apparmor: refactor profile rules and attachments

Browse Source 
In preparation for moving from a single set of rules and a single
attachment to multiple rulesets and attachments separate from the
profile refactor attachment information and ruleset info into their
own structures.

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2022-07-29 17:17:31 -07:00
parent 3bf3d728a5
commit 217af7e2f4
18 changed files with 308 additions and 239 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
security/apparmor/apparmorfs.c
View File

@ -611,30 +611,29 @@ static const struct file_operations aa_fs_ns_revision_fops = {
static void profile_query_cb(struct aa_profile *profile, struct aa_perms *perms,
const char *match_str, size_t match_len)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_perms tmp = { };
struct aa_dfa *dfa;
aa_state_t state = DFA_NOMATCH;
if (profile_unconfined(profile))
return;
if (profile->file.dfa && *match_str == AA_CLASS_FILE) {
dfa = profile->file.dfa;
state = aa_dfa_match_len(dfa,
profile->file.start[AA_CLASS_FILE],
if (rules->file.dfa && *match_str == AA_CLASS_FILE) {
state = aa_dfa_match_len(rules->file.dfa,
rules->file.start[AA_CLASS_FILE],
match_str + 1, match_len - 1);
if (state) {
struct path_cond cond = { };
tmp = *(aa_lookup_fperms(&(profile->file), state, &cond));
tmp = *(aa_lookup_fperms(&(rules->file), state, &cond));
}
} else if (profile->policy.dfa) {
if (!PROFILE_MEDIATES(profile, *match_str))
} else if (rules->policy.dfa) {
if (!RULE_MEDIATES(rules, *match_str))
return; /* no change to current perms */
dfa = profile->policy.dfa;
state = aa_dfa_match_len(dfa, profile->policy.start[0],
state = aa_dfa_match_len(rules->policy.dfa,
rules->policy.start[0],
match_str, match_len);
if (state)
tmp = *aa_lookup_perms(&profile->policy, state);
tmp = *aa_lookup_perms(&rules->policy, state);
}
aa_apply_modes_to_perms(profile, &tmp);
aa_perms_accum_raw(perms, &tmp);
@ -1093,9 +1092,9 @@ static int seq_profile_attach_show(struct seq_file *seq, void *v)
struct aa_proxy *proxy = seq->private;
struct aa_label *label = aa_get_label_rcu(&proxy->label);
struct aa_profile *profile = labels_profile(label);
if (profile->attach)
seq_printf(seq, "%s\n", profile->attach);
else if (profile->xmatch.dfa)
if (profile->attach.xmatch_str)
seq_printf(seq, "%s\n", profile->attach.xmatch_str);
else if (profile->attach.xmatch.dfa)
seq_puts(seq, "<unknown>\n");
else
seq_printf(seq, "%s\n", profile->base.name);

12
security/apparmor/capability.c
View File

@ -64,6 +64,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
static int audit_caps(struct common_audit_data *sa, struct aa_profile *profile,
int cap, int error)
{
struct aa_ruleset *rules = &profile->rules;
struct audit_cache *ent;
int type = AUDIT_APPARMOR_AUTO;
@ -72,13 +73,13 @@ static int audit_caps(struct common_audit_data *sa, struct aa_profile *profile,
if (likely(!error)) {
/* test if auditing is being forced */
if (likely((AUDIT_MODE(profile) != AUDIT_ALL) &&
!cap_raised(profile->caps.audit, cap)))
!cap_raised(rules->caps.audit, cap)))
return 0;
type = AUDIT_APPARMOR_AUDIT;
} else if (KILL_MODE(profile) ||
cap_raised(profile->caps.kill, cap)) {
cap_raised(rules->caps.kill, cap)) {
type = AUDIT_APPARMOR_KILL;
} else if (cap_raised(profile->caps.quiet, cap) &&
} else if (cap_raised(rules->caps.quiet, cap) &&
AUDIT_MODE(profile) != AUDIT_NOQUIET &&
AUDIT_MODE(profile) != AUDIT_ALL) {
/* quiet auditing */
@ -114,10 +115,11 @@ static int audit_caps(struct common_audit_data *sa, struct aa_profile *profile,
static int profile_capable(struct aa_profile *profile, int cap,
unsigned int opts, struct common_audit_data *sa)
{
struct aa_ruleset *rules = &profile->rules;
int error;
if (cap_raised(profile->caps.allow, cap) &&
!cap_raised(profile->caps.denied, cap))
if (cap_raised(rules->caps.allow, cap) &&
!cap_raised(rules->caps.denied, cap))
error = 0;
else
error = -EPERM;

81
security/apparmor/domain.c
View File

@ -81,19 +81,20 @@ static inline aa_state_t match_component(struct aa_profile *profile,
struct aa_profile *tp,
bool stack, aa_state_t state)
{
struct aa_ruleset *rules = &profile->rules;
const char *ns_name;
if (stack)
state = aa_dfa_match(profile->file.dfa, state, "&");
state = aa_dfa_match(rules->file.dfa, state, "&");
if (profile->ns == tp->ns)
return aa_dfa_match(profile->file.dfa, state, tp->base.hname);
return aa_dfa_match(rules->file.dfa, state, tp->base.hname);
/* try matching with namespace name and then profile */
ns_name = aa_ns_name(profile->ns, tp->ns, true);
state = aa_dfa_match_len(profile->file.dfa, state, ":", 1);
state = aa_dfa_match(profile->file.dfa, state, ns_name);
state = aa_dfa_match_len(profile->file.dfa, state, ":", 1);
return aa_dfa_match(profile->file.dfa, state, tp->base.hname);
state = aa_dfa_match_len(rules->file.dfa, state, ":", 1);
state = aa_dfa_match(rules->file.dfa, state, ns_name);
state = aa_dfa_match_len(rules->file.dfa, state, ":", 1);
return aa_dfa_match(rules->file.dfa, state, tp->base.hname);
}
/**
@ -117,6 +118,7 @@ static int label_compound_match(struct aa_profile *profile,
aa_state_t state, bool subns, u32 request,
struct aa_perms *perms)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_profile *tp;
struct label_it i;
struct path_cond cond = { };
@ -139,12 +141,12 @@ next:
label_for_each_cont(i, label, tp) {
if (!aa_ns_visible(profile->ns, tp->ns, subns))
continue;
state = aa_dfa_match(profile->file.dfa, state, "//&");
state = aa_dfa_match(rules->file.dfa, state, "//&");
state = match_component(profile, tp, false, state);
if (!state)
goto fail;
}
*perms = *(aa_lookup_fperms(&(profile->file), state, &cond));
*perms = *(aa_lookup_fperms(&(rules->file), state, &cond));
aa_apply_modes_to_perms(profile, perms);
if ((perms->allow & request) != request)
return -EACCES;
@ -177,6 +179,7 @@ static int label_components_match(struct aa_profile *profile,
aa_state_t start, bool subns, u32 request,
struct aa_perms *perms)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_profile *tp;
struct label_it i;
struct aa_perms tmp;
@ -197,7 +200,7 @@ static int label_components_match(struct aa_profile *profile,
return 0;
next:
tmp = *(aa_lookup_fperms(&(profile->file), state, &cond));
tmp = *(aa_lookup_fperms(&(rules->file), state, &cond));
aa_apply_modes_to_perms(profile, &tmp);
aa_perms_accum(perms, &tmp);
label_for_each_cont(i, label, tp) {
@ -206,7 +209,7 @@ next:
state = match_component(profile, tp, stack, start);
if (!state)
goto fail;
tmp = *(aa_lookup_fperms(&(profile->file), state, &cond));
tmp = *(aa_lookup_fperms(&(rules->file), state, &cond));
aa_apply_modes_to_perms(profile, &tmp);
aa_perms_accum(perms, &tmp);
}
@ -296,18 +299,19 @@ static int aa_xattrs_match(const struct linux_binprm *bprm,
ssize_t size;
struct dentry *d;
char *value = NULL;
int value_size = 0, ret = profile->xattr_count;
struct aa_attachment *attach = &profile->attach;
int value_size = 0, ret = attach->xattr_count;
if (!bprm || !profile->xattr_count)
if (!bprm || !attach->xattr_count)
return 0;
might_sleep();
/* transition from exec match to xattr set */
state = aa_dfa_outofband_transition(profile->xmatch.dfa, state);
state = aa_dfa_outofband_transition(attach->xmatch.dfa, state);
d = bprm->file->f_path.dentry;
for (i = 0; i < profile->xattr_count; i++) {
size = vfs_getxattr_alloc(&init_user_ns, d, profile->xattrs[i],
for (i = 0; i < attach->xattr_count; i++) {
size = vfs_getxattr_alloc(&init_user_ns, d, attach->xattrs[i],
&value, value_size, GFP_KERNEL);
if (size >= 0) {
u32 index, perm;
@ -317,20 +321,20 @@ static int aa_xattrs_match(const struct linux_binprm *bprm,
* that not present xattr can be distinguished from a 0
* length value or rule that matches any value
*/
state = aa_dfa_null_transition(profile->xmatch.dfa,
state = aa_dfa_null_transition(attach->xmatch.dfa,
state);
/* Check xattr value */
state = aa_dfa_match_len(profile->xmatch.dfa, state,
state = aa_dfa_match_len(attach->xmatch.dfa, state,
value, size);
index = ACCEPT_TABLE(profile->xmatch.dfa)[state];
perm = profile->xmatch.perms[index].allow;
index = ACCEPT_TABLE(attach->xmatch.dfa)[state];
perm = attach->xmatch.perms[index].allow;
if (!(perm & MAY_EXEC)) {
ret = -EINVAL;
goto out;
}
}
/* transition to next element */
state = aa_dfa_outofband_transition(profile->xmatch.dfa, state);
state = aa_dfa_outofband_transition(attach->xmatch.dfa, state);
if (size < 0) {
/*
* No xattr match, so verify if transition to
@ -382,6 +386,8 @@ static struct aa_label *find_attach(const struct linux_binprm *bprm,
rcu_read_lock();
restart:
list_for_each_entry_rcu(profile, head, base.list) {
struct aa_attachment *attach = &profile->attach;
if (profile->label.flags & FLAG_NULL &&
&profile->label == ns_unconfined(profile->ns))
continue;
@ -397,16 +403,16 @@ restart:
* as another profile, signal a conflict and refuse to
* match.
*/
if (profile->xmatch.dfa) {
if (attach->xmatch.dfa) {
unsigned int count;
aa_state_t state;
u32 index, perm;
state = aa_dfa_leftmatch(profile->xmatch.dfa,
profile->xmatch.start[AA_CLASS_XMATCH],
state = aa_dfa_leftmatch(attach->xmatch.dfa,
attach->xmatch.start[AA_CLASS_XMATCH],
name, &count);
index = ACCEPT_TABLE(profile->xmatch.dfa)[state];
perm = profile->xmatch.perms[index].allow;
index = ACCEPT_TABLE(attach->xmatch.dfa)[state];
perm = attach->xmatch.perms[index].allow;
/* any accepting state means a valid match. */
if (perm & MAY_EXEC) {
int ret = 0;
@ -414,7 +420,7 @@ restart:
if (count < candidate_len)
continue;
if (bprm && profile->xattr_count) {
if (bprm && attach->xattr_count) {
long rev = READ_ONCE(ns->revision);
if (!aa_get_profile_not0(profile))
@ -453,7 +459,7 @@ restart:
* xattrs, or a longer match
*/
candidate = profile;
candidate_len = max(count, profile->xmatch_len);
candidate_len = max(count, attach->xmatch_len);
candidate_xattrs = ret;
conflict = false;
}
@ -497,6 +503,7 @@ static const char *next_name(int xtype, const char *name)
struct aa_label *x_table_lookup(struct aa_profile *profile, u32 xindex,
const char **name)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_label *label = NULL;
u32 xtype = xindex & AA_X_TYPE_MASK;
int index = xindex & AA_X_INDEX_MASK;
@ -507,7 +514,7 @@ struct aa_label *x_table_lookup(struct aa_profile *profile, u32 xindex,
/* TODO: move lookup parsing to unpack time so this is a straight
* index into the resultant label
*/
for (*name = profile->file.trans.table[index]; !label && *name;
for (*name = rules->file.trans.table[index]; !label && *name;
*name = next_name(xtype, *name)) {
if (xindex & AA_X_CHILD) {
struct aa_profile *new_profile;
@ -546,6 +553,7 @@ static struct aa_label *x_to_label(struct aa_profile *profile,
const char **lookupname,
const char **info)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_label *new = NULL;
struct aa_ns *ns = profile->ns;
u32 xtype = xindex & AA_X_TYPE_MASK;
@ -558,7 +566,7 @@ static struct aa_label *x_to_label(struct aa_profile *profile,
break;
case AA_X_TABLE:
/* TODO: fix when perm mapping done at unload */
stack = profile->file.trans.table[xindex & AA_X_INDEX_MASK];
stack = rules->file.trans.table[xindex & AA_X_INDEX_MASK];
if (*stack != '&') {
/* released by caller */
new = x_table_lookup(profile, xindex, lookupname);
@ -612,9 +620,10 @@ static struct aa_label *profile_transition(struct aa_profile *profile,
char *buffer, struct path_cond *cond,
bool *secure_exec)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_label *new = NULL;
const char *info = NULL, *name = NULL, *target = NULL;
aa_state_t state = profile->file.start[AA_CLASS_FILE];
aa_state_t state = rules->file.start[AA_CLASS_FILE];
struct aa_perms perms = {};
bool nonewprivs = false;
int error = 0;
@ -648,7 +657,7 @@ static struct aa_label *profile_transition(struct aa_profile *profile,
}
/* find exec permissions for name */
state = aa_str_perms(&(profile->file), state, name, cond, &perms);
state = aa_str_perms(&(rules->file), state, name, cond, &perms);
if (perms.allow & MAY_EXEC) {
/* exec permission determine how to transition */
new = x_to_label(profile, bprm, name, perms.xindex, &target,
@ -710,7 +719,8 @@ static int profile_onexec(struct aa_profile *profile, struct aa_label *onexec,
char *buffer, struct path_cond *cond,
bool *secure_exec)
{
aa_state_t state = profile->file.start[AA_CLASS_FILE];
struct aa_ruleset *rules = &profile->rules;
aa_state_t state = rules->file.start[AA_CLASS_FILE];
struct aa_perms perms = {};
const char *xname = NULL, *info = "change_profile onexec";
int error = -EACCES;
@ -743,7 +753,7 @@ static int profile_onexec(struct aa_profile *profile, struct aa_label *onexec,
}
/* find exec permissions for name */
state = aa_str_perms(&(profile->file), state, xname, cond, &perms);
state = aa_str_perms(&(rules->file), state, xname, cond, &perms);
if (!(perms.allow & AA_MAY_ONEXEC)) {
info = "no change_onexec valid for executable";
goto audit;
@ -752,7 +762,7 @@ static int profile_onexec(struct aa_profile *profile, struct aa_label *onexec,
* onexec permission is linked to exec with a standard pairing
* exec\0change_profile
*/
state = aa_dfa_null_transition(profile->file.dfa, state);
state = aa_dfa_null_transition(rules->file.dfa, state);
error = change_profile_perms(profile, onexec, stack, AA_MAY_ONEXEC,
state, &perms);
if (error) {
@ -1249,12 +1259,13 @@ static int change_profile_perms_wrapper(const char *op, const char *name,
struct aa_label *target, bool stack,
u32 request, struct aa_perms *perms)
{
struct aa_ruleset *rules = &profile->rules;
const char *info = NULL;
int error = 0;
if (!error)
error = change_profile_perms(profile, target, stack, request,
profile->file.start[AA_CLASS_FILE],
rules->file.start[AA_CLASS_FILE],
perms);
if (error)
error = aa_audit_file(profile, perms, op, request, name,

14
security/apparmor/file.c
View File

@ -224,11 +224,12 @@ int __aa_path_perm(const char *op, struct aa_profile *profile, const char *name,
u32 request, struct path_cond *cond, int flags,
struct aa_perms *perms)
{
struct aa_ruleset *rules = &profile->rules;
int e = 0;
if (profile_unconfined(profile))
return 0;
aa_str_perms(&(profile->file), profile->file.start[AA_CLASS_FILE],
aa_str_perms(&(rules->file), rules->file.start[AA_CLASS_FILE],
name, cond, perms);
if (request & ~perms->allow)
e = -EACCES;
@ -316,6 +317,7 @@ static int profile_path_link(struct aa_profile *profile,
const struct path *target, char *buffer2,
struct path_cond *cond)
{
struct aa_ruleset *rules = &profile->rules;
const char *lname, *tname = NULL;
struct aa_perms lperms = {}, perms;
const char *info = NULL;
@ -336,16 +338,16 @@ static int profile_path_link(struct aa_profile *profile,
error = -EACCES;
/* aa_str_perms - handles the case of the dfa being NULL */
state = aa_str_perms(&(profile->file),
profile->file.start[AA_CLASS_FILE], lname,
state = aa_str_perms(&(rules->file),
rules->file.start[AA_CLASS_FILE], lname,
cond, &lperms);
if (!(lperms.allow & AA_MAY_LINK))
goto audit;
/* test to see if target can be paired with link */
state = aa_dfa_null_transition(profile->file.dfa, state);
aa_str_perms(&(profile->file), state, tname, cond, &perms);
state = aa_dfa_null_transition(rules->file.dfa, state);
aa_str_perms(&(rules->file), state, tname, cond, &perms);
/* force audit/quiet masks for link are stored in the second entry
* in the link pair.
@ -367,7 +369,7 @@ static int profile_path_link(struct aa_profile *profile,
/* Do link perm subset test requiring allowed permission on link are
* a subset of the allowed permissions on target.
*/
aa_str_perms(&(profile->file), profile->file.start[AA_CLASS_FILE],
aa_str_perms(&(rules->file), rules->file.start[AA_CLASS_FILE],
tname, cond, &perms);
/* AA_MAY_LINK is not considered in the subset test */

9
security/apparmor/include/label.h
View File

@ -261,7 +261,7 @@ for ((I).i = (I).j = 0; \
struct label_it i; \
int ret = 0; \
label_for_each(i, (L), profile) { \
if (PROFILE_MEDIATES(profile, (C))) { \
if (RULE_MEDIATES(&profile->rules, (C))) { \
ret = 1; \
break; \
} \
@ -357,9 +357,10 @@ static inline const char *aa_label_str_split(const char *str)
struct aa_perms;
int aa_label_match(struct aa_profile *profile, struct aa_label *label,
aa_state_t state, bool subns, u32 request,
struct aa_perms *perms);
struct aa_ruleset;
int aa_label_match(struct aa_profile *profile, struct aa_ruleset *rules,
struct aa_label *label, aa_state_t state, bool subns,
u32 request, struct aa_perms *perms);
/**

3
security/apparmor/include/perms.h
View File

@ -207,7 +207,8 @@ void aa_apply_modes_to_perms(struct aa_profile *profile,
struct aa_perms *perms);
void aa_perms_accum(struct aa_perms *accum, struct aa_perms *addend);
void aa_perms_accum_raw(struct aa_perms *accum, struct aa_perms *addend);
void aa_profile_match_label(struct aa_profile *profile, struct aa_label *label,
void aa_profile_match_label(struct aa_profile *profile,
struct aa_ruleset *rules, struct aa_label *label,
int type, u32 request, struct aa_perms *perms);
int aa_profile_label_perm(struct aa_profile *profile, struct aa_profile *target,
u32 request, int type, u32 *deny,

84
security/apparmor/include/policy.h
View File

@ -123,6 +123,43 @@ struct aa_data {
struct rhash_head head;
};
/* struct aa_ruleset - data covering mediation rules
* @size: the memory consumed by this ruleset
* @policy: general match rules governing policy
* @file: The set of rules governing basic file access and domain transitions
* @caps: capabilities for the profile
* @rlimits: rlimits for the profile
* @secmark_count: number of secmark entries
* @secmark: secmark label match info
*/
struct aa_ruleset {
int size;
/* TODO: merge policy and file */
struct aa_policydb policy;
struct aa_policydb file;
struct aa_caps caps;
struct aa_rlimit rlimits;
int secmark_count;
struct aa_secmark *secmark;
};
/* struct aa_attachment - data and rules for a profiles attachment
* @xmatch_str: human readable attachment string
* @xmatch: optional extended matching for unconfined executables names
* @xmatch_len: xmatch prefix len, used to determine xmatch priority
* @xattr_count: number of xattrs in table
* @xattrs: table of xattrs
*/
struct aa_attachment {
const char *xmatch_str;
struct aa_policydb xmatch;
unsigned int xmatch_len;
int xattr_count;
char **xattrs;
};
/* struct aa_profile - basic confinement data
* @base - base components of the profile (name, refcount, lists, lock ...)
@ -130,18 +167,13 @@ struct aa_data {
* @parent: parent of profile
* @ns: namespace the profile is in
* @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
* @mode: the enforcement mode of the profile
* @path_flags: flags controlling path generation behavior
* @disconnected: what to prepend if attach_disconnected is specified
* @size: the memory consumed by this profiles rules
* @policy: general match rules governing policy
* @file: The set of rules governing basic file access and domain transitions
* @caps: capabilities for the profile
* @rlimits: rlimits for the profile
* @attach: attachment rules for the profile
* @rules: rules to be enforced
*
* @dents: dentries for the profiles file entries in apparmorfs
* @dirname: name of the profile dir in apparmorfs
@ -166,27 +198,13 @@ struct aa_profile {
struct aa_ns *ns;
const char *rename;
const char *attach;
struct aa_policydb xmatch;
unsigned int xmatch_len;
enum audit_mode audit;
long mode;
u32 path_flags;
const char *disconnected;
int size;
struct aa_policydb policy;
struct aa_policydb file;
struct aa_caps caps;
int xattr_count;
char **xattrs;
struct aa_rlimit rlimits;
int secmark_count;
struct aa_secmark *secmark;
struct aa_attachment attach;
struct aa_ruleset rules;
struct aa_loaddata *rawdata;
unsigned char *hash;
@ -247,24 +265,24 @@ static inline struct aa_profile *aa_get_newest_profile(struct aa_profile *p)
return labels_profile(aa_get_newest_label(&p->label));
}
static inline aa_state_t PROFILE_MEDIATES(struct aa_profile *profile,
unsigned char class)
static inline aa_state_t RULE_MEDIATES(struct aa_ruleset *rules,
unsigned char class)
{
if (class <= AA_CLASS_LAST)
return profile->policy.start[class];
return rules->policy.start[class];
else
return aa_dfa_match_len(profile->policy.dfa,
profile->policy.start[0], &class, 1);
return aa_dfa_match_len(rules->policy.dfa,
rules->policy.start[0], &class, 1);
}
static inline aa_state_t PROFILE_MEDIATES_AF(struct aa_profile *profile,
u16 AF) {
aa_state_t state = PROFILE_MEDIATES(profile, AA_CLASS_NET);
static inline aa_state_t RULE_MEDIATES_AF(struct aa_ruleset *rules, u16 AF)
{
aa_state_t state = RULE_MEDIATES(rules, AA_CLASS_NET);
__be16 be_af = cpu_to_be16(AF);
if (!state)
return DFA_NOMATCH;
return aa_dfa_match_len(profile->policy.dfa, state, (char *) &be_af, 2);
return aa_dfa_match_len(rules->policy.dfa, state, (char *) &be_af, 2);
}
/**

9
security/apparmor/ipc.c
View File

@ -78,19 +78,20 @@ static int profile_signal_perm(struct aa_profile *profile,
struct aa_label *peer, u32 request,
struct common_audit_data *sa)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_perms perms;
aa_state_t state;
if (profile_unconfined(profile) ||
!PROFILE_MEDIATES(profile, AA_CLASS_SIGNAL))
!RULE_MEDIATES(rules, AA_CLASS_SIGNAL))
return 0;
aad(sa)->peer = peer;
/* TODO: secondary cache check <profile, profile, perm> */
state = aa_dfa_next(profile->policy.dfa,
profile->policy.start[AA_CLASS_SIGNAL],
state = aa_dfa_next(rules->policy.dfa,
rules->policy.start[AA_CLASS_SIGNAL],
aad(sa)->signal);
aa_label_match(profile, peer, state, false, request, &perms);
aa_label_match(profile, rules, peer, state, false, request, &perms);
aa_apply_modes_to_perms(profile, &perms);
return aa_check_perms(profile, &perms, request, sa, audit_signal_cb);
}

45
security/apparmor/label.c
View File

@ -1266,20 +1266,21 @@ static inline bool label_is_visible(struct aa_profile *profile,
* visibility test.
*/
static inline aa_state_t match_component(struct aa_profile *profile,
struct aa_ruleset *rules,
struct aa_profile *tp,
aa_state_t state)
{
const char *ns_name;
if (profile->ns == tp->ns)
return aa_dfa_match(profile->policy.dfa, state, tp->base.hname);
return aa_dfa_match(rules->policy.dfa, state, tp->base.hname);
/* try matching with namespace name and then profile */
ns_name = aa_ns_name(profile->ns, tp->ns, true);
state = aa_dfa_match_len(profile->policy.dfa, state, ":", 1);
state = aa_dfa_match(profile->policy.dfa, state, ns_name);
state = aa_dfa_match_len(profile->policy.dfa, state, ":", 1);
return aa_dfa_match(profile->policy.dfa, state, tp->base.hname);
state = aa_dfa_match_len(rules->policy.dfa, state, ":", 1);
state = aa_dfa_match(rules->policy.dfa, state, ns_name);
state = aa_dfa_match_len(rules->policy.dfa, state, ":", 1);
return aa_dfa_match(rules->policy.dfa, state, tp->base.hname);
}
/**
@ -1298,6 +1299,7 @@ static inline aa_state_t match_component(struct aa_profile *profile,
* check to be stacked.
*/
static int label_compound_match(struct aa_profile *profile,
struct aa_ruleset *rules,
struct aa_label *label,
aa_state_t state, bool subns, u32 request,
struct aa_perms *perms)
@ -1309,7 +1311,7 @@ static int label_compound_match(struct aa_profile *profile,
label_for_each(i, label, tp) {
if (!aa_ns_visible(profile->ns, tp->ns, subns))
continue;
state = match_component(profile, tp, state);
state = match_component(profile, rules, tp, state);
if (!state)
goto fail;
goto next;
@ -1323,12 +1325,12 @@ next:
label_for_each_cont(i, label, tp) {
if (!aa_ns_visible(profile->ns, tp->ns, subns))
continue;
state = aa_dfa_match(profile->policy.dfa, state, "//&");
state = match_component(profile, tp, state);
state = aa_dfa_match(rules->policy.dfa, state, "//&");
state = match_component(profile, rules, tp, state);
if (!state)
goto fail;
}
*perms = *aa_lookup_perms(&profile->policy, state);
*perms = *aa_lookup_perms(&rules->policy, state);
aa_apply_modes_to_perms(profile, perms);
if ((perms->allow & request) != request)
return -EACCES;
@ -1343,6 +1345,7 @@ fail:
/**
* label_components_match - find perms for all subcomponents of a label
* @profile: profile to find perms for
* @rules: ruleset to search
* @label: label to check access permissions for
* @start: state to start match in
* @subns: whether to do permission checks on components in a subns
@ -1356,6 +1359,7 @@ fail:
* check to be stacked.
*/
static int label_components_match(struct aa_profile *profile,
struct aa_ruleset *rules,
struct aa_label *label, aa_state_t start,
bool subns, u32 request,
struct aa_perms *perms)
@ -1369,7 +1373,7 @@ static int label_components_match(struct aa_profile *profile,
label_for_each(i, label, tp) {
if (!aa_ns_visible(profile->ns, tp->ns, subns))
continue;
state = match_component(profile, tp, start);
state = match_component(profile, rules, tp, start);
if (!state)
goto fail;
goto next;
@ -1379,16 +1383,16 @@ static int label_components_match(struct aa_profile *profile,
return 0;
next:
tmp = *aa_lookup_perms(&profile->policy, state);
tmp = *aa_lookup_perms(&rules->policy, state);
aa_apply_modes_to_perms(profile, &tmp);
aa_perms_accum(perms, &tmp);
label_for_each_cont(i, label, tp) {
if (!aa_ns_visible(profile->ns, tp->ns, subns))
continue;
state = match_component(profile, tp, start);
state = match_component(profile, rules, tp, start);
if (!state)
goto fail;
tmp = *aa_lookup_perms(&profile->policy, state);
tmp = *aa_lookup_perms(&rules->policy, state);
aa_apply_modes_to_perms(profile, &tmp);
aa_perms_accum(perms, &tmp);
}
@ -1406,6 +1410,7 @@ fail:
/**
* aa_label_match - do a multi-component label match
* @profile: profile to match against (NOT NULL)
* @rules: ruleset to search
* @label: label to match (NOT NULL)
* @state: state to start in
* @subns: whether to match subns components
@ -1414,18 +1419,18 @@ fail:
*
* Returns: the state the match finished in, may be the none matching state
*/
int aa_label_match(struct aa_profile *profile, struct aa_label *label,
aa_state_t state, bool subns, u32 request,
struct aa_perms *perms)
int aa_label_match(struct aa_profile *profile, struct aa_ruleset *rules,
struct aa_label *label, aa_state_t state, bool subns,
u32 request, struct aa_perms *perms)
{
int error = label_compound_match(profile, label, state, subns, request,
perms);
int error = label_compound_match(profile, rules, label, state, subns,
request, perms);
if (!error)
return error;
*perms = allperms;
return label_components_match(profile, label, state, subns, request,
perms);
return label_components_match(profile, rules, label, state, subns,
request, perms);
}

13
security/apparmor/lib.c
View File

@ -331,16 +331,18 @@ void aa_apply_modes_to_perms(struct aa_profile *profile, struct aa_perms *perms)
perms->prompt = ALL_PERMS_MASK;
}
void aa_profile_match_label(struct aa_profile *profile, struct aa_label *label,
void aa_profile_match_label(struct aa_profile *profile,
struct aa_ruleset *rules,
struct aa_label *label,
int type, u32 request, struct aa_perms *perms)
{
/* TODO: doesn't yet handle extended types */
aa_state_t state;
state = aa_dfa_next(profile->policy.dfa,
profile->policy.start[AA_CLASS_LABEL],
state = aa_dfa_next(rules->policy.dfa,
rules->policy.start[AA_CLASS_LABEL],
type);
aa_label_match(profile, label, state, false, request, perms);
aa_label_match(profile, rules, label, state, false, request, perms);
}
@ -355,7 +357,8 @@ int aa_profile_label_perm(struct aa_profile *profile, struct aa_profile *target,
aad(sa)->peer = &target->label;
aad(sa)->request = request;
aa_profile_match_label(profile, &target->label, type, request, &perms);
aa_profile_match_label(profile, &profile->rules, &target->label, type,
request, &perms);
aa_apply_modes_to_perms(profile, &perms);
*deny |= request & perms.deny;
return aa_check_perms(profile, &perms, request, sa, aa_audit_perms_cb);

4
security/apparmor/lsm.c
View File

@ -166,9 +166,9 @@ static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective,
if (COMPLAIN_MODE(profile))
continue;
*effective = cap_intersect(*effective,
profile->caps.allow);
profile->rules.caps.allow);
*permitted = cap_intersect(*permitted,
profile->caps.allow);
profile->rules.caps.allow);
}
}
rcu_read_unlock();

31
security/apparmor/mount.c
View File

@ -303,13 +303,14 @@ static int match_mnt_path_str(struct aa_profile *profile,
{
struct aa_perms perms = { };
const char *mntpnt = NULL, *info = NULL;
struct aa_ruleset *rules = &profile->rules;
int pos, error;
AA_BUG(!profile);
AA_BUG(!mntpath);
AA_BUG(!buffer);
if (!PROFILE_MEDIATES(profile, AA_CLASS_MOUNT))
if (!RULE_MEDIATES(rules, AA_CLASS_MOUNT))
return 0;
error = aa_path_name(mntpath, path_flags(profile, mntpath), buffer,
@ -324,8 +325,8 @@ static int match_mnt_path_str(struct aa_profile *profile,
}
error = -EACCES;
pos = do_match_mnt(&profile->policy,
profile->policy.start[AA_CLASS_MOUNT],
pos = do_match_mnt(&rules->policy,
rules->policy.start[AA_CLASS_MOUNT],
mntpnt, devname, type, flags, data, binary, &perms);
if (pos) {
info = mnt_info_table[pos];
@ -363,7 +364,7 @@ static int match_mnt(struct aa_profile *profile, const struct path *path,
AA_BUG(!profile);
AA_BUG(devpath && !devbuffer);
if (!PROFILE_MEDIATES(profile, AA_CLASS_MOUNT))
if (!RULE_MEDIATES(&profile->rules, AA_CLASS_MOUNT))
return 0;
if (devpath) {
@ -565,6 +566,7 @@ out:
static int profile_umount(struct aa_profile *profile, const struct path *path,
char *buffer)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_perms perms = { };
const char *name = NULL, *info = NULL;
aa_state_t state;
@ -573,7 +575,7 @@ static int profile_umount(struct aa_profile *profile, const struct path *path,
AA_BUG(!profile);
AA_BUG(!path);
if (!PROFILE_MEDIATES(profile, AA_CLASS_MOUNT))
if (!RULE_MEDIATES(rules, AA_CLASS_MOUNT))
return 0;
error = aa_path_name(path, path_flags(profile, path), buffer, &name,
@ -581,10 +583,10 @@ static int profile_umount(struct aa_profile *profile, const struct path *path,
if (error)
goto audit;
state = aa_dfa_match(profile->policy.dfa,
profile->policy.start[AA_CLASS_MOUNT],
state = aa_dfa_match(rules->policy.dfa,
rules->policy.start[AA_CLASS_MOUNT],
name);
perms = *aa_lookup_perms(&profile->policy, state);
perms = *aa_lookup_perms(&rules->policy, state);
if (AA_MAY_UMOUNT & ~perms.allow)
error = -EACCES;
@ -624,6 +626,7 @@ static struct aa_label *build_pivotroot(struct aa_profile *profile,
const struct path *old_path,
char *old_buffer)
{
struct aa_ruleset *rules = &profile->rules;
const char *old_name, *new_name = NULL, *info = NULL;
const char *trans_name = NULL;
struct aa_perms perms = { };
@ -635,7 +638,7 @@ static struct aa_label *build_pivotroot(struct aa_profile *profile,
AA_BUG(!old_path);
if (profile_unconfined(profile) ||
!PROFILE_MEDIATES(profile, AA_CLASS_MOUNT))
!RULE_MEDIATES(rules, AA_CLASS_MOUNT))
return aa_get_newest_label(&profile->label);
error = aa_path_name(old_path, path_flags(profile, old_path),
@ -650,12 +653,12 @@ static struct aa_label *build_pivotroot(struct aa_profile *profile,
goto audit;
error = -EACCES;
state = aa_dfa_match(profile->policy.dfa,
profile->policy.start[AA_CLASS_MOUNT],
state = aa_dfa_match(rules->policy.dfa,
rules->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 = *aa_lookup_perms(&profile->policy, state);
state = aa_dfa_null_transition(rules->policy.dfa, state);
state = aa_dfa_match(rules->policy.dfa, state, old_name);
perms = *aa_lookup_perms(&rules->policy, state);
if (AA_MAY_PIVOTROOT & perms.allow)
error = 0;

24
security/apparmor/net.c
View File

@ -108,6 +108,7 @@ void audit_net_cb(struct audit_buffer *ab, void *va)
int aa_profile_af_perm(struct aa_profile *profile, struct common_audit_data *sa,
u32 request, u16 family, int type)
{
struct aa_ruleset *rules = &profile->rules;
struct aa_perms perms = { };
aa_state_t state;
__be16 buffer[2];
@ -117,15 +118,15 @@ int aa_profile_af_perm(struct aa_profile *profile, struct common_audit_data *sa,
if (profile_unconfined(profile))
return 0;
state = PROFILE_MEDIATES(profile, AA_CLASS_NET);
state = RULE_MEDIATES(rules, AA_CLASS_NET);
if (!state)
return 0;
buffer[0] = cpu_to_be16(family);
buffer[1] = cpu_to_be16((u16) type);
state = aa_dfa_match_len(profile->policy.dfa, state, (char *) &buffer,
state = aa_dfa_match_len(rules->policy.dfa, state, (char *) &buffer,
4);
perms = *aa_lookup_perms(&profile->policy, state);
perms = *aa_lookup_perms(&rules->policy, state);
aa_apply_modes_to_perms(profile, &perms);
return aa_check_perms(profile, &perms, request, sa, audit_net_cb);
@ -216,25 +217,26 @@ static int aa_secmark_perm(struct aa_profile *profile, u32 request, u32 secid,
{
int i, ret;
struct aa_perms perms = { };
struct aa_ruleset *rules = &profile->rules;
if (profile->secmark_count == 0)
if (rules->secmark_count == 0)
return 0;
for (i = 0; i < profile->secmark_count; i++) {
if (!profile->secmark[i].secid) {
ret = apparmor_secmark_init(&profile->secmark[i]);
for (i = 0; i < rules->secmark_count; i++) {
if (!rules->secmark[i].secid) {
ret = apparmor_secmark_init(&rules->secmark[i]);
if (ret)
return ret;
}
if (profile->secmark[i].secid == secid ||
profile->secmark[i].secid == AA_SECID_WILDCARD) {
if (profile->secmark[i].deny)
if (rules->secmark[i].secid == secid ||
rules->secmark[i].secid == AA_SECID_WILDCARD) {
if (rules->secmark[i].deny)
perms.deny = ALL_PERMS_MASK;
else
perms.allow = ALL_PERMS_MASK;
if (profile->secmark[i].audit)
if (rules->secmark[i].audit)
perms.audit = ALL_PERMS_MASK;
}
}

44
security/apparmor/policy.c
View File

@ -193,6 +193,30 @@ static void aa_free_data(void *ptr, void *arg)
kfree_sensitive(data);
}
static void free_attachment(struct aa_attachment *attach)
{
int i;
for (i = 0; i < attach->xattr_count; i++)
kfree_sensitive(attach->xattrs[i]);
kfree_sensitive(attach->xattrs);
aa_destroy_policydb(&attach->xmatch);
}
static void free_ruleset(struct aa_ruleset *rules)
{
int i;
aa_destroy_policydb(&rules->file);
aa_destroy_policydb(&rules->policy);
aa_free_cap_rules(&rules->caps);
aa_free_rlimit_rules(&rules->rlimits);
for (i = 0; i < rules->secmark_count; i++)
kfree_sensitive(rules->secmark[i].label);
kfree_sensitive(rules->secmark);
}
/**
* aa_free_profile - free a profile
* @profile: the profile to free (MAYBE NULL)
@ -206,7 +230,6 @@ static void aa_free_data(void *ptr, void *arg)
void aa_free_profile(struct aa_profile *profile)
{
struct rhashtable *rht;
int i;
AA_DEBUG("%s(%p)\n", __func__, profile);
@ -220,19 +243,10 @@ void aa_free_profile(struct aa_profile *profile)
aa_put_ns(profile->ns);
kfree_sensitive(profile->rename);
aa_destroy_policydb(&profile->file);
aa_free_cap_rules(&profile->caps);
aa_free_rlimit_rules(&profile->rlimits);
for (i = 0; i < profile->xattr_count; i++)
kfree_sensitive(profile->xattrs[i]);
kfree_sensitive(profile->xattrs);
for (i = 0; i < profile->secmark_count; i++)
kfree_sensitive(profile->secmark[i].label);
kfree_sensitive(profile->secmark);
free_attachment(&profile->attach);
free_ruleset(&profile->rules);
kfree_sensitive(profile->dirname);
aa_destroy_policydb(&profile->xmatch);
aa_destroy_policydb(&profile->policy);
if (profile->data) {
rht = profile->data;
profile->data = NULL;
@ -544,8 +558,8 @@ name:
/* released on free_profile */
rcu_assign_pointer(profile->parent, aa_get_profile(parent));
profile->ns = aa_get_ns(parent->ns);
profile->file.dfa = aa_get_dfa(nulldfa);
profile->policy.dfa = aa_get_dfa(nulldfa);
profile->rules.file.dfa = aa_get_dfa(nulldfa);
profile->rules.policy.dfa = aa_get_dfa(nulldfa);
mutex_lock_nested(&profile->ns->lock, profile->ns->level);
p = __find_child(&parent->base.profiles, bname);

4
security/apparmor/policy_ns.c
View File

@ -91,8 +91,8 @@ static struct aa_profile *alloc_unconfined(const char *name)
profile->label.flags |= FLAG_IX_ON_NAME_ERROR |
FLAG_IMMUTIBLE | FLAG_NS_COUNT | FLAG_UNCONFINED;
profile->mode = APPARMOR_UNCONFINED;
profile->file.dfa = aa_get_dfa(nulldfa);
profile->policy.dfa = aa_get_dfa(nulldfa);
profile->rules.file.dfa = aa_get_dfa(nulldfa);
profile->rules.policy.dfa = aa_get_dfa(nulldfa);
return profile;
}

118
security/apparmor/policy_unpack.c
View File

@ -556,12 +556,12 @@ static bool unpack_xattrs(struct aa_ext *e, struct aa_profile *profile)
if (unpack_array(e, NULL, &size) != TRI_TRUE)
goto fail;
profile->xattr_count = size;
profile->xattrs = kcalloc(size, sizeof(char *), GFP_KERNEL);
if (!profile->xattrs)
profile->attach.xattr_count = size;
profile->attach.xattrs = kcalloc(size, sizeof(char *), GFP_KERNEL);
if (!profile->attach.xattrs)
goto fail;
for (i = 0; i < size; i++) {
if (!unpack_strdup(e, &profile->xattrs[i], NULL))
if (!unpack_strdup(e, &profile->attach.xattrs[i], NULL))
goto fail;
}
if (!unpack_nameX(e, AA_ARRAYEND, NULL))
@ -579,6 +579,7 @@ fail:
static bool unpack_secmark(struct aa_ext *e, struct aa_profile *profile)
{
struct aa_ruleset *rules = &profile->rules;
void *pos = e->pos;
u16 size;
int i;
@ -587,19 +588,19 @@ static bool unpack_secmark(struct aa_ext *e, struct aa_profile *profile)
if (unpack_array(e, NULL, &size) != TRI_TRUE)
goto fail;
profile->secmark = kcalloc(size, sizeof(struct aa_secmark),
rules->secmark = kcalloc(size, sizeof(struct aa_secmark),
GFP_KERNEL);
if (!profile->secmark)
if (!rules->secmark)
goto fail;
profile->secmark_count = size;
rules->secmark_count = size;
for (i = 0; i < size; i++) {
if (!unpack_u8(e, &profile->secmark[i].audit, NULL))
if (!unpack_u8(e, &rules->secmark[i].audit, NULL))
goto fail;
if (!unpack_u8(e, &profile->secmark[i].deny, NULL))
if (!unpack_u8(e, &rules->secmark[i].deny, NULL))
goto fail;
if (!unpack_strdup(e, &profile->secmark[i].label, NULL))
if (!unpack_strdup(e, &rules->secmark[i].label, NULL))
goto fail;
}
if (!unpack_nameX(e, AA_ARRAYEND, NULL))
@ -611,12 +612,12 @@ static bool unpack_secmark(struct aa_ext *e, struct aa_profile *profile)
return true;
fail:
if (profile->secmark) {
if (rules->secmark) {
for (i = 0; i < size; i++)
kfree(profile->secmark[i].label);
kfree(profile->secmark);
profile->secmark_count = 0;
profile->secmark = NULL;
kfree(rules->secmark[i].label);
kfree(rules->secmark);
rules->secmark_count = 0;
rules->secmark = NULL;
}
e->pos = pos;
@ -634,7 +635,7 @@ static bool unpack_rlimits(struct aa_ext *e, struct aa_profile *profile)
u32 tmp = 0;
if (!unpack_u32(e, &tmp, NULL))
goto fail;
profile->rlimits.mask = tmp;
profile->rules.rlimits.mask = tmp;
if (unpack_array(e, NULL, &size) != TRI_TRUE ||
size > RLIM_NLIMITS)
@ -644,7 +645,7 @@ static bool unpack_rlimits(struct aa_ext *e, struct aa_profile *profile)
int a = aa_map_resource(i);
if (!unpack_u64(e, &tmp2, NULL))
goto fail;
profile->rlimits.limits[a].rlim_max = tmp2;
profile->rules.rlimits.limits[a].rlim_max = tmp2;
}
if (!unpack_nameX(e, AA_ARRAYEND, NULL))
goto fail;
@ -816,6 +817,7 @@ static int datacmp(struct rhashtable_compare_arg *arg, const void *obj)
*/
static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
{
struct aa_ruleset *rules;
struct aa_profile *profile = NULL;
const char *tmpname, *tmpns = NULL, *name = NULL;
const char *info = "failed to unpack profile";
@ -850,27 +852,30 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
profile = aa_alloc_profile(name, NULL, GFP_KERNEL);
if (!profile)
return ERR_PTR(-ENOMEM);
rules = &profile->rules;
/* profile renaming is optional */
(void) unpack_str(e, &profile->rename, "rename");
/* attachment string is optional */
(void) unpack_str(e, &profile->attach, "attach");
(void) unpack_str(e, &profile->attach.xmatch_str, "attach");
/* xmatch is optional and may be NULL */
error = unpack_pdb(e, &profile->xmatch, false, false, &info);
if (error)
error = unpack_pdb(e, &profile->attach.xmatch, false, false, &info);
if (error) {
info = "bad xmatch";
goto fail;
}
/* neither xmatch_len not xmatch_perms are optional if xmatch is set */
if (profile->xmatch.dfa) {
if (profile->attach.xmatch.dfa) {
if (!unpack_u32(e, &tmp, NULL)) {
info = "missing xmatch len";
goto fail;
}
profile->xmatch_len = tmp;
profile->xmatch.start[AA_CLASS_XMATCH] = DFA_START;
if (aa_compat_map_xmatch(&profile->xmatch)) {
profile->attach.xmatch_len = tmp;
profile->attach.xmatch.start[AA_CLASS_XMATCH] = DFA_START;
if (aa_compat_map_xmatch(&profile->attach.xmatch)) {
info = "failed to convert xmatch permission table";
goto fail;
}
@ -926,11 +931,11 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
profile->path_flags = PATH_MEDIATE_DELETED;
info = "failed to unpack profile capabilities";
if (!unpack_u32(e, &(profile->caps.allow.cap[0]), NULL))
if (!unpack_u32(e, &(rules->caps.allow.cap[0]), NULL))
goto fail;
if (!unpack_u32(e, &(profile->caps.audit.cap[0]), NULL))
if (!unpack_u32(e, &(rules->caps.audit.cap[0]), NULL))
goto fail;
if (!unpack_u32(e, &(profile->caps.quiet.cap[0]), NULL))
if (!unpack_u32(e, &(rules->caps.quiet.cap[0]), NULL))
goto fail;
if (!unpack_u32(e, &tmpcap.cap[0], NULL))
goto fail;
@ -938,11 +943,11 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
info = "failed to unpack upper profile capabilities";
if (unpack_nameX(e, AA_STRUCT, "caps64")) {
/* optional upper half of 64 bit caps */
if (!unpack_u32(e, &(profile->caps.allow.cap[1]), NULL))
if (!unpack_u32(e, &(rules->caps.allow.cap[1]), NULL))
goto fail;
if (!unpack_u32(e, &(profile->caps.audit.cap[1]), NULL))
if (!unpack_u32(e, &(rules->caps.audit.cap[1]), NULL))
goto fail;
if (!unpack_u32(e, &(profile->caps.quiet.cap[1]), NULL))
if (!unpack_u32(e, &(rules->caps.quiet.cap[1]), NULL))
goto fail;
if (!unpack_u32(e, &(tmpcap.cap[1]), NULL))
goto fail;
@ -953,9 +958,9 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
info = "failed to unpack extended profile capabilities";
if (unpack_nameX(e, AA_STRUCT, "capsx")) {
/* optional extended caps mediation mask */
if (!unpack_u32(e, &(profile->caps.extended.cap[0]), NULL))
if (!unpack_u32(e, &(rules->caps.extended.cap[0]), NULL))
goto fail;
if (!unpack_u32(e, &(profile->caps.extended.cap[1]), NULL))
if (!unpack_u32(e, &(rules->caps.extended.cap[1]), NULL))
goto fail;
if (!unpack_nameX(e, AA_STRUCTEND, NULL))
goto fail;
@ -979,40 +984,41 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
if (unpack_nameX(e, AA_STRUCT, "policydb")) {
/* generic policy dfa - optional and may be NULL */
info = "failed to unpack policydb";
error = unpack_pdb(e, &profile->policy, true, false, &info);
error = unpack_pdb(e, &rules->policy, true, false,
&info);
if (error)
goto fail;
/* Fixup: drop when we get rid of start array */
if (aa_dfa_next(profile->policy.dfa, profile->policy.start[0],
if (aa_dfa_next(rules->policy.dfa, rules->policy.start[0],
AA_CLASS_FILE))
profile->policy.start[AA_CLASS_FILE] =
aa_dfa_next(profile->policy.dfa,
profile->policy.start[0],
rules->policy.start[AA_CLASS_FILE] =
aa_dfa_next(rules->policy.dfa,
rules->policy.start[0],
AA_CLASS_FILE);
if (!unpack_nameX(e, AA_STRUCTEND, NULL))
goto fail;
if (aa_compat_map_policy(&profile->policy, e->version)) {
if (aa_compat_map_policy(&rules->policy, e->version)) {
info = "failed to remap policydb permission table";
goto fail;
}
} else
profile->policy.dfa = aa_get_dfa(nulldfa);
rules->policy.dfa = aa_get_dfa(nulldfa);
/* get file rules */
error = unpack_pdb(e, &profile->file, false, true, &info);
error = unpack_pdb(e, &rules->file, false, true, &info);
if (error) {
goto fail;
} else if (profile->file.dfa) {
if (aa_compat_map_file(&profile->file)) {
} else if (rules->file.dfa) {
if (aa_compat_map_file(&rules->file)) {
info = "failed to remap file permission table";
goto fail;
}
} else if (profile->policy.dfa &&
profile->policy.start[AA_CLASS_FILE]) {
profile->file.dfa = aa_get_dfa(profile->policy.dfa);
profile->file.start[AA_CLASS_FILE] = profile->policy.start[AA_CLASS_FILE];
} else if (rules->policy.dfa &&
rules->policy.start[AA_CLASS_FILE]) {
rules->file.dfa = aa_get_dfa(rules->policy.dfa);
rules->file.start[AA_CLASS_FILE] = rules->policy.start[AA_CLASS_FILE];
} else
profile->file.dfa = aa_get_dfa(nulldfa);
rules->file.dfa = aa_get_dfa(nulldfa);
if (unpack_nameX(e, AA_STRUCT, "data")) {
info = "out of memory";
@ -1202,28 +1208,28 @@ static bool verify_perms(struct aa_policydb *pdb)
*/
static int verify_profile(struct aa_profile *profile)
{
if ((profile->file.dfa &&
!verify_dfa_xindex(profile->file.dfa,
profile->file.trans.size)) ||
(profile->policy.dfa &&
!verify_dfa_xindex(profile->policy.dfa,
profile->policy.trans.size))) {
if ((profile->rules.file.dfa &&
!verify_dfa_xindex(profile->rules.file.dfa,
profile->rules.file.trans.size)) ||
(profile->rules.policy.dfa &&
!verify_dfa_xindex(profile->rules.policy.dfa,
profile->rules.policy.trans.size))) {
audit_iface(profile, NULL, NULL,
"Unpack: Invalid named transition", NULL, -EPROTO);
return -EPROTO;
}
if (!verify_perms(&profile->file)) {
if (!verify_perms(&profile->rules.file)) {
audit_iface(profile, NULL, NULL,
"Unpack: Invalid perm index", NULL, -EPROTO);
return -EPROTO;
}
if (!verify_perms(&profile->policy)) {
if (!verify_perms(&profile->rules.policy)) {
audit_iface(profile, NULL, NULL,
"Unpack: Invalid perm index", NULL, -EPROTO);
return -EPROTO;
}
if (!verify_perms(&profile->xmatch)) {
if (!verify_perms(&profile->attach.xmatch)) {
audit_iface(profile, NULL, NULL,
"Unpack: Invalid perm index", NULL, -EPROTO);
return -EPROTO;

15
security/apparmor/resource.c
View File

@ -82,10 +82,11 @@ int aa_map_resource(int resource)
static int profile_setrlimit(struct aa_profile *profile, unsigned int resource,
struct rlimit *new_rlim)
{
struct aa_ruleset *rules = &profile->rules;
int e = 0;
if (profile->rlimits.mask & (1 << resource) && new_rlim->rlim_max >
profile->rlimits.limits[resource].rlim_max)
if (rules->rlimits.mask & (1 << resource) && new_rlim->rlim_max >
rules->rlimits.limits[resource].rlim_max)
e = -EACCES;
return audit_resource(profile, resource, new_rlim->rlim_max, NULL, NULL,
e);
@ -153,12 +154,12 @@ void __aa_transition_rlimits(struct aa_label *old_l, struct aa_label *new_l)
* to the lesser of the tasks hard limit and the init tasks soft limit
*/
label_for_each_confined(i, old_l, old) {
if (old->rlimits.mask) {
if (old->rules.rlimits.mask) {
int j;
for (j = 0, mask = 1; j < RLIM_NLIMITS; j++,
mask <<= 1) {
if (old->rlimits.mask & mask) {
if (old->rules.rlimits.mask & mask) {
rlim = current->signal->rlim + j;
initrlim = init_task.signal->rlim + j;
rlim->rlim_cur = min(rlim->rlim_max,
@ -172,15 +173,15 @@ void __aa_transition_rlimits(struct aa_label *old_l, struct aa_label *new_l)
label_for_each_confined(i, new_l, new) {
int j;
if (!new->rlimits.mask)
if (!new->rules.rlimits.mask)
continue;
for (j = 0, mask = 1; j < RLIM_NLIMITS; j++, mask <<= 1) {
if (!(new->rlimits.mask & mask))
if (!(new->rules.rlimits.mask & mask))
continue;
rlim = current->signal->rlim + j;
rlim->rlim_max = min(rlim->rlim_max,
new->rlimits.limits[j].rlim_max);
new->rules.rlimits.limits[j].rlim_max);
/* soft limit should not exceed hard limit */
rlim->rlim_cur = min(rlim->rlim_cur, rlim->rlim_max);
}

10
security/apparmor/task.c
View File

@ -223,7 +223,7 @@ static void audit_ptrace_cb(struct audit_buffer *ab, void *va)
FLAGS_NONE, GFP_ATOMIC);
}
/* assumes check for PROFILE_MEDIATES is already done */
/* assumes check for RULE_MEDIATES is already done */
/* TODO: conditionals */
static int profile_ptrace_perm(struct aa_profile *profile,
struct aa_label *peer, u32 request,
@ -232,8 +232,8 @@ static int profile_ptrace_perm(struct aa_profile *profile,
struct aa_perms perms = { };
aad(sa)->peer = peer;
aa_profile_match_label(profile, peer, AA_CLASS_PTRACE, request,
&perms);
aa_profile_match_label(profile, &profile->rules, peer,
AA_CLASS_PTRACE, request, &perms);
aa_apply_modes_to_perms(profile, &perms);
return aa_check_perms(profile, &perms, request, sa, audit_ptrace_cb);
}
@ -243,7 +243,7 @@ static int profile_tracee_perm(struct aa_profile *tracee,
struct common_audit_data *sa)
{
if (profile_unconfined(tracee) || unconfined(tracer) ||
!PROFILE_MEDIATES(tracee, AA_CLASS_PTRACE))
!RULE_MEDIATES(&tracee->rules, AA_CLASS_PTRACE))
return 0;
return profile_ptrace_perm(tracee, tracer, request, sa);
@ -256,7 +256,7 @@ static int profile_tracer_perm(struct aa_profile *tracer,
if (profile_unconfined(tracer))
return 0;
if (PROFILE_MEDIATES(tracer, AA_CLASS_PTRACE))
if (RULE_MEDIATES(&tracer->rules, AA_CLASS_PTRACE))
return profile_ptrace_perm(tracer, tracee, request, sa);
/* profile uses the old style capability check for ptrace */