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parser: convert deny flag from bool to rule_mode

Browse source 
We need to be able to support more rule types than allow and deny so
convert to an enum.

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2021-09-09 01:42:51 -07:00
parent f76d134b6c
commit 355730d8c7
14 changed files with 82 additions and 74 deletions
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18
parser/af_unix.cc
View file

@ -95,7 +95,7 @@ void unix_rule::move_peer_conditionals(struct cond_entry *conds)
}
}
unix_rule::unix_rule(unsigned int type_p, audit_t audit_p, bool denied):
unix_rule::unix_rule(unsigned int type_p, audit_t audit_p, rule_mode_t rule_mode_p):
af_rule("unix"), addr(NULL), peer_addr(NULL)
{
if (type_p != 0xffffffff) {
@ -106,7 +106,7 @@ unix_rule::unix_rule(unsigned int type_p, audit_t audit_p, bool denied):
}
perms = AA_VALID_NET_PERMS;
audit = audit_p;
deny = denied;
rule_mode = rule_mode_p;
}
unix_rule::unix_rule(perms_t perms_p, struct cond_entry *conds,
@ -193,7 +193,7 @@ void unix_rule::downgrade_rule(Profile &prof) {
yyerror(_("Memory allocation error."));
if (sock_type_n != -1)
mask = 1 << sock_type_n;
if (!deny) {
if (rule_mode != RULE_DENY) {
prof.net.allow[AF_UNIX] |= mask;
if (audit == AUDIT_FORCE)
prof.net.audit[AF_UNIX] |= mask;
@ -334,7 +334,7 @@ int unix_rule::gen_policy_re(Profile &prof)
write_to_prot(buffer);
if ((mask & AA_NET_CREATE) && !has_peer_conds()) {
buf = buffer.str();
if (!prof.policy.rules->add_rule(buf.c_str(), deny,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY,
map_perms(AA_NET_CREATE),
map_perms(audit == AUDIT_FORCE ? AA_NET_CREATE : 0),
dfaflags))
@ -359,7 +359,7 @@ int unix_rule::gen_policy_re(Profile &prof)
tmp << "\\x00";
buf = tmp.str();
if (!prof.policy.rules->add_rule(buf.c_str(), deny,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY,
map_perms(AA_NET_BIND),
map_perms(audit == AUDIT_FORCE ? AA_NET_BIND : 0),
dfaflags))
@ -384,7 +384,7 @@ int unix_rule::gen_policy_re(Profile &prof)
AA_LOCAL_NET_PERMS & ~AA_LOCAL_NET_CMD;
if (mask & local_mask) {
buf = buffer.str();
if (!prof.policy.rules->add_rule(buf.c_str(), deny,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY,
map_perms(mask & local_mask),
map_perms(audit == AUDIT_FORCE ? mask & local_mask : 0),
dfaflags))
@ -398,7 +398,7 @@ int unix_rule::gen_policy_re(Profile &prof)
/* TODO: backlog conditional: for now match anything*/
tmp << "..";
buf = tmp.str();
if (!prof.policy.rules->add_rule(buf.c_str(), deny,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY,
map_perms(AA_NET_LISTEN),
map_perms(audit == AUDIT_FORCE ? AA_NET_LISTEN : 0),
dfaflags))
@ -411,7 +411,7 @@ int unix_rule::gen_policy_re(Profile &prof)
/* TODO: sockopt conditional: for now match anything */
tmp << "..";
buf = tmp.str();
if (!prof.policy.rules->add_rule(buf.c_str(), deny,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY,
map_perms(AA_NET_OPT),
map_perms(audit == AUDIT_FORCE ? AA_NET_OPT : 0),
dfaflags))
@ -432,7 +432,7 @@ int unix_rule::gen_policy_re(Profile &prof)
goto fail;
buf = buffer.str();
if (!prof.policy.rules->add_rule(buf.c_str(), deny, map_perms(perms & AA_PEER_NET_PERMS), map_perms(audit == AUDIT_FORCE ? perms & AA_PEER_NET_PERMS : 0), dfaflags))
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY, map_perms(perms & AA_PEER_NET_PERMS), map_perms(audit == AUDIT_FORCE ? perms & AA_PEER_NET_PERMS : 0), dfaflags))
goto fail;
}

2
parser/af_unix.h
View file

@ -37,7 +37,7 @@ public:
char *addr;
char *peer_addr;
unix_rule(unsigned int type_p, audit_t audit_p, bool denied);
unix_rule(unsigned int type_p, audit_t audit_p, rule_mode_t rule_mode_p);
unix_rule(perms_t perms, struct cond_entry *conds,
struct cond_entry *peer_conds);
virtual ~unix_rule()

6
parser/dbus.cc
View file

@ -275,20 +275,20 @@ int dbus_rule::gen_policy_re(Profile &prof)
}
if (perms & AA_DBUS_BIND) {
if (!prof.policy.rules->add_rule_vec(deny, perms & AA_DBUS_BIND,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms & AA_DBUS_BIND,
audit == AUDIT_FORCE ? perms & AA_DBUS_BIND : 0,
2, vec, dfaflags, false))
goto fail;
}
if (perms & (AA_DBUS_SEND | AA_DBUS_RECEIVE)) {
if (!prof.policy.rules->add_rule_vec(deny,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY,
perms & (AA_DBUS_SEND | AA_DBUS_RECEIVE),
audit == AUDIT_FORCE ? perms & (AA_DBUS_SEND | AA_DBUS_RECEIVE) : 0,
6, vec, dfaflags, false))
goto fail;
}
if (perms & AA_DBUS_EAVESDROP) {
if (!prof.policy.rules->add_rule_vec(deny,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY,
perms & AA_DBUS_EAVESDROP,
audit == AUDIT_FORCE ? perms & AA_DBUS_EAVESDROP : 0,
1, vec, dfaflags, false))

18
parser/mount.cc
View file

@ -741,7 +741,7 @@ int mnt_rule::gen_policy_remount(Profile &prof, int &count,
* if a data match is required this only has AA_MATCH_CONT perms
* else it has full perms
*/
if (!prof.policy.rules->add_rule_vec(deny, tmpperms, tmpaudit, 4,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, tmpperms, tmpaudit, 4,
vec, dfaflags, false))
goto fail;
count++;
@ -752,7 +752,7 @@ int mnt_rule::gen_policy_remount(Profile &prof, int &count,
if (!build_mnt_opts(optsbuf, opts))
goto fail;
vec[4] = optsbuf.c_str();
if (!prof.policy.rules->add_rule_vec(deny, perms,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms,
(audit == AUDIT_FORCE ? perms : 0),
5, vec, dfaflags, false))
goto fail;
@ -794,7 +794,7 @@ int mnt_rule::gen_policy_bind_mount(Profile &prof, int &count,
opt_flags & MS_BIND_FLAGS))
goto fail;
vec[3] = flagsbuf;
if (!prof.policy.rules->add_rule_vec(deny, perms, audit == AUDIT_FORCE ? perms : 0,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0,
4, vec,
dfaflags, false))
goto fail;
@ -836,7 +836,7 @@ int mnt_rule::gen_policy_change_mount_type(Profile &prof, int &count,
opt_flags & MS_MAKE_FLAGS))
goto fail;
vec[3] = flagsbuf;
if (!prof.policy.rules->add_rule_vec(deny, perms, audit == AUDIT_FORCE ? perms : 0,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0,
4, vec,
dfaflags, false))
goto fail;
@ -879,7 +879,7 @@ int mnt_rule::gen_policy_move_mount(Profile &prof, int &count,
opt_flags & MS_MOVE_FLAGS))
goto fail;
vec[3] = flagsbuf;
if (!prof.policy.rules->add_rule_vec(deny, perms, audit == AUDIT_FORCE ? perms : 0,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0,
4, vec,
dfaflags, false))
goto fail;
@ -931,7 +931,7 @@ int mnt_rule::gen_policy_new_mount(Profile &prof, int &count,
tmpaudit = audit == AUDIT_FORCE ? perms : 0;
}
/* rule for match without required data || data MATCH_CONT */
if (!prof.policy.rules->add_rule_vec(deny, tmpperms, tmpaudit, 4,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, tmpperms, tmpaudit, 4,
vec, dfaflags, false))
goto fail;
count++;
@ -942,7 +942,7 @@ int mnt_rule::gen_policy_new_mount(Profile &prof, int &count,
if (!build_mnt_opts(optsbuf, opts))
goto fail;
vec[4] = optsbuf.c_str();
if (!prof.policy.rules->add_rule_vec(deny, perms,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms,
audit == AUDIT_FORCE ? perms : 0,
5, vec, dfaflags, false))
goto fail;
@ -1034,7 +1034,7 @@ int mnt_rule::gen_policy_re(Profile &prof)
if (!convert_entry(mntbuf, mnt_point))
goto fail;
vec[0] = mntbuf.c_str();
if (!prof.policy.rules->add_rule_vec(deny, perms,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms,
(audit == AUDIT_FORCE ? perms : 0), 1, vec,
dfaflags, false))
goto fail;
@ -1049,7 +1049,7 @@ int mnt_rule::gen_policy_re(Profile &prof)
if (!clear_and_convert_entry(devbuf, device))
goto fail;
vec[1] = devbuf.c_str();
if (!prof.policy.rules->add_rule_vec(deny, perms,
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms,
(audit == AUDIT_FORCE ? perms : 0), 2, vec,
dfaflags, false))
goto fail;

8
parser/mqueue.cc
View file

@ -230,10 +230,10 @@ int mqueue_rule::gen_policy_re(Profile &prof)
/* store perms at name match so label doesn't need
* to be checked
*/
if (!label && !prof.policy.rules->add_rule_vec(deny, perms, audit == AUDIT_FORCE ? perms : 0, 1, vec, dfaflags, false))
if (!label && !prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0, 1, vec, dfaflags, false))
goto fail;
/* also provide label match with perm */
if (!prof.policy.rules->add_rule_vec(deny, perms, audit == AUDIT_FORCE ? perms : 0, size, vec, dfaflags, false))
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0, size, vec, dfaflags, false))
goto fail;
}
}
@ -265,10 +265,10 @@ int mqueue_rule::gen_policy_re(Profile &prof)
}
if (perms & AA_VALID_SYSV_MQ_PERMS) {
if (!label && !prof.policy.rules->add_rule_vec(deny, perms, audit == AUDIT_FORCE ? perms : 0, 1, vec, dfaflags, false))
if (!label && !prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0, 1, vec, dfaflags, false))
goto fail;
/* also provide label match with perm */
if (!prof.policy.rules->add_rule_vec(deny, perms, audit == AUDIT_FORCE ? perms : 0, size, vec, dfaflags, false))
if (!prof.policy.rules->add_rule_vec(rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0, size, vec, dfaflags, false))
goto fail;
}
}

2
parser/parser.h
View file

@ -124,7 +124,7 @@ struct cod_entry {
* just for this executable */
perms_t perms; /* perms is 'or' of AA_* bits */
audit_t audit;
int deny; /* TRUE or FALSE */
rule_mode_t rule_mode;
bool alias_ignore; /* ignore for alias processing */

4
parser/parser_merge.c
View file

@ -48,8 +48,8 @@ static int file_comp(const void *c1, const void *c2)
if (res)
return res;
if ((*e1)->deny != (*e2)->deny)
return (*e1)->deny < (*e2)->deny ? -1 : 1;
if ((*e1)->rule_mode != (*e2)->rule_mode)
return (*e1)->rule_mode < (*e2)->rule_mode ? -1 : 1;
if ((*e1)->audit != (*e2)->audit)
return (*e1)->audit < (*e2)->audit ? -1 : 1;

4
parser/parser_misc.c
View file

@ -962,7 +962,7 @@ struct cod_entry *new_entry(char *id, perms_t perms, char *link_id)
entry->link_name = link_id;
entry->perms = perms;
entry->audit = AUDIT_UNSPECIFIED;
entry->deny = FALSE;
entry->rule_mode = RULE_UNSPECIFIED;
entry->pattern_type = ePatternInvalid;
entry->pat.regex = NULL;
@ -986,7 +986,7 @@ struct cod_entry *copy_cod_entry(struct cod_entry *orig)
DUP_STRING(orig, entry, nt_name, err);
entry->perms = orig->perms;
entry->audit = orig->audit;
entry->deny = orig->deny;
entry->rule_mode = orig->rule_mode;
/* XXX - need to create copies of the patterns, too */
entry->pattern_type = orig->pattern_type;

18
parser/parser_regex.c
View file

@ -627,17 +627,19 @@ static int process_dfa_entry(aare_rules *dfarules, struct cod_entry *entry)
* than link in the entry.
* TODO: split link and change_profile entries earlier
*/
if (entry->deny) {
if (entry->rule_mode == RULE_DENY) {
if ((entry->perms & ~AA_LINK_BITS) &&
!is_change_profile_perms(entry->perms) &&
!dfarules->add_rule(tbuf.c_str(), entry->deny,
!dfarules->add_rule(tbuf.c_str(), entry->rule_mode == RULE_DENY,
entry->perms & ~(AA_LINK_BITS | AA_CHANGE_PROFILE),
entry->audit == AUDIT_FORCE ? entry->perms & ~(AA_LINK_BITS | AA_CHANGE_PROFILE) : 0,
dfaflags))
return FALSE;
} else if (!is_change_profile_perms(entry->perms)) {
if (!dfarules->add_rule(tbuf.c_str(), entry->deny, entry->perms,
entry->audit == AUDIT_FORCE ? entry->perms : 0, dfaflags))
if (!dfarules->add_rule(tbuf.c_str(),
entry->rule_mode == RULE_DENY, entry->perms,
entry->audit == AUDIT_FORCE ? entry->perms : 0,
dfaflags))
return FALSE;
}
@ -660,7 +662,7 @@ static int process_dfa_entry(aare_rules *dfarules, struct cod_entry *entry)
perms |= LINK_TO_LINK_SUBSET(perms);
vec[1] = "/[^/].*";
}
if (!dfarules->add_rule_vec(entry->deny, perms, entry->audit == AUDIT_FORCE ? perms & AA_LINK_BITS : 0, 2, vec, dfaflags, false))
if (!dfarules->add_rule_vec(entry->rule_mode == RULE_DENY, perms, entry->audit == AUDIT_FORCE ? perms & AA_LINK_BITS : 0, 2, vec, dfaflags, false))
return FALSE;
}
if (is_change_profile_perms(entry->perms)) {
@ -711,13 +713,13 @@ static int process_dfa_entry(aare_rules *dfarules, struct cod_entry *entry)
}
/* regular change_profile rule */
if (!dfarules->add_rule_vec(entry->deny,
if (!dfarules->add_rule_vec(entry->rule_mode == RULE_DENY,
AA_CHANGE_PROFILE | onexec_perms,
0, index - 1, &vec[1], dfaflags, false))
return FALSE;
/* onexec rules - both rules are needed for onexec */
if (!dfarules->add_rule_vec(entry->deny, onexec_perms,
if (!dfarules->add_rule_vec(entry->rule_mode == RULE_DENY, onexec_perms,
0, 1, vec, dfaflags, false))
return FALSE;
@ -726,7 +728,7 @@ static int process_dfa_entry(aare_rules *dfarules, struct cod_entry *entry)
* unsafe exec transitions
*/
onexec_perms |= (entry->perms & (AA_EXEC_BITS | ALL_AA_EXEC_UNSAFE));
if (!dfarules->add_rule_vec(entry->deny, onexec_perms,
if (!dfarules->add_rule_vec(entry->rule_mode == RULE_DENY, onexec_perms,
0, index, vec, dfaflags, false))
return FALSE;
}

51
parser/parser_yacc.y
View file

@ -216,6 +216,7 @@ void add_local_entry(Profile *prof);
struct prefixes prefix;
IncludeCache_t *includecache;
audit_t audit;
rule_mode_t rule_mode;
}
%type <id> TOK_ID
@ -258,7 +259,7 @@ void add_local_entry(Profile *prof);
%type <boolean> opt_owner_flag
%type <boolean> opt_profile_flag
%type <boolean> opt_flags
%type <boolean> opt_perm_mode
%type <rule_mode> opt_rule_mode
%type <id> opt_id
%type <prefix> opt_prefix
%type <fperms> dbus_perm
@ -659,14 +660,14 @@ opt_owner_flag: { /* nothing */ $$ = 0; }
| TOK_OWNER { $$ = 1; };
| TOK_OTHER { $$ = 2; };
opt_perm_mode: { /* nothing */ $$ = 0; }
| TOK_ALLOW { $$ = 0; }
| TOK_DENY { $$ = 1; }
opt_rule_mode: { /* nothing */ $$ = RULE_UNSPECIFIED; }
| TOK_ALLOW { $$ = RULE_ALLOW; }
| TOK_DENY { $$ = RULE_DENY; }
opt_prefix: opt_audit_flag opt_perm_mode opt_owner_flag
opt_prefix: opt_audit_flag opt_rule_mode opt_owner_flag
{
$$.audit = $1;
$$.deny = $2;
$$.rule_mode = $2;
$$.owner = $3;
}
@ -687,11 +688,11 @@ rules: rules opt_prefix rule
PDEBUG("rules rule: (%s)\n", $3->name);
if (!$3)
yyerror(_("Assert: `rule' returned NULL."));
$3->deny = $2.deny;
if (($2.deny && ($3->perms & AA_EXEC_BITS) &&
$3->rule_mode = $2.rule_mode;
if ((($2.rule_mode == RULE_DENY) && ($3->perms & AA_EXEC_BITS) &&
($3->perms & ALL_AA_EXEC_TYPE)))
yyerror(_("Invalid perms, in deny rules 'x' must not be preceded by exec qualifier 'i', 'p', or 'u'"));
else if (!$2.deny && ($3->perms & AA_EXEC_BITS) &&
else if (($2.rule_mode != RULE_DENY) && ($3->perms & AA_EXEC_BITS) &&
!($3->perms & ALL_AA_EXEC_TYPE) &&
!($3->nt_name))
yyerror(_("Invalid perms, 'x' must be preceded by exec qualifier 'i', 'p', 'c', or 'u'"));
@ -701,7 +702,7 @@ rules: rules opt_prefix rule
else if ($2.owner == 2)
$3->perms &= (AA_OTHER_PERMS | AA_SHARED_PERMS);
/* only set audit ctl quieting if the rule is not audited */
if (($2.deny && $2.audit != AUDIT_FORCE) || (!$2.deny && $2.audit == AUDIT_FORCE))
if ((($2.rule_mode == RULE_DENY) && $2.audit != AUDIT_FORCE) || (($2.rule_mode != RULE_DENY) && $2.audit == AUDIT_FORCE))
$3->audit = AUDIT_FORCE;
add_entry_to_policy($1, $3);
$$ = $1;
@ -711,18 +712,18 @@ rules: rules opt_prefix rule
rules: rules opt_prefix TOK_OPEN rules TOK_CLOSE
{
struct cod_entry *entry, *tmp;
if ($2.deny)
if ($2.rule_mode == RULE_DENY)
yyerror(_("deny prefix not allowed"));
PDEBUG("matched: %s%s%sblock\n", $2.audit == AUDIT_FORCE ? "audit " : "",
$2.deny ? "deny " : "", $2.owner ? "owner " : "");
$2.rule_mode == RULE_DENY ? "deny " : "", $2.owner ? "owner " : "");
list_for_each_safe($4->entries, entry, tmp) {
entry->next = NULL;
if (entry->perms & AA_EXEC_BITS) {
if (entry->deny &&
if ((entry->rule_mode == RULE_DENY) &&
(entry->perms & ALL_AA_EXEC_TYPE))
yyerror(_("Invalid perms, in deny rules 'x' must not be preceded by exec qualifier 'i', 'p', or 'u'"));
else if (!entry->deny &&
else if ((entry->rule_mode != RULE_DENY) &&
!(entry->perms & ALL_AA_EXEC_TYPE))
yyerror(_("Invalid perms, 'x' must be preceded by exec qualifier 'i', 'p', or 'u'"));
}
@ -731,9 +732,9 @@ rules: rules opt_prefix TOK_OPEN rules TOK_CLOSE
else if ($2.owner == 2)
entry->perms &= (AA_OTHER_PERMS | AA_SHARED_PERMS);
if ($2.audit == AUDIT_FORCE && !entry->deny)
if ($2.audit == AUDIT_FORCE && (entry->rule_mode != RULE_DENY))
entry->audit = AUDIT_FORCE;
else if ($2.audit != AUDIT_FORCE && entry->deny)
else if ($2.audit != AUDIT_FORCE && (entry->rule_mode == RULE_DENY))
entry->audit = AUDIT_FORCE;
add_entry_to_policy($1, entry);
}
@ -760,14 +761,14 @@ rules: rules opt_prefix network_rule
* downgrade if needed
*/
if (entry->family == AF_UNIX) {
unix_rule *rule = new unix_rule(entry->type, $2.audit, $2.deny);
unix_rule *rule = new unix_rule(entry->type, $2.audit, $2.rule_mode);
if (!rule)
yyerror(_("Memory allocation error."));
$1->rule_ents.push_back(rule);
}
if (entry->type > SOCK_PACKET) {
/* setting mask instead of a bit */
if ($2.deny) {
if ($2.rule_mode == RULE_DENY) {
$1->net.deny[entry->family] |= entry->type;
if ($2.audit != AUDIT_FORCE)
$1->net.quiet[entry->family] |= entry->type;
@ -777,7 +778,7 @@ rules: rules opt_prefix network_rule
$1->net.audit[entry->family] |= entry->type;
}
} else {
if ($2.deny) {
if ($2.rule_mode == RULE_DENY) {
$1->net.deny[entry->family] |= 1 << entry->type;
if ($2.audit != AUDIT_FORCE)
$1->net.quiet[entry->family] |= 1 << entry->type;
@ -818,10 +819,10 @@ rules: rules opt_prefix change_profile
yyerror(_("Assert: `change_profile' returned NULL."));
if ($2.owner)
yyerror(_("owner prefix not allowed on unix rules"));
if ($2.deny && $2.audit == AUDIT_FORCE) {
$3->deny = 1;
} else if ($2.deny) {
$3->deny = 1;
if (($2.rule_mode == RULE_DENY) && $2.audit == AUDIT_FORCE) {
$3->rule_mode = RULE_DENY;
} else if ($2.rule_mode == RULE_DENY) {
$3->rule_mode = RULE_DENY;
$3->audit = AUDIT_FORCE;
} else if ($2.audit != AUDIT_UNSPECIFIED) {
$3->audit = $2.audit;
@ -835,9 +836,9 @@ rules: rules opt_prefix capability
if ($2.owner)
yyerror(_("owner prefix not allowed on capability rules"));
if ($2.deny && $2.audit == AUDIT_FORCE) {
if ($2.rule_mode == RULE_DENY && $2.audit == AUDIT_FORCE) {
$1->caps.deny |= $3;
} else if ($2.deny) {
} else if ($2.rule_mode == RULE_DENY) {
$1->caps.deny |= $3;
$1->caps.quiet |= $3;
} else {

2
parser/ptrace.cc
View file

@ -135,7 +135,7 @@ int ptrace_rule::gen_policy_re(Profile &prof)
buf = buffer.str();
if (perms & AA_VALID_PTRACE_PERMS) {
if (!prof.policy.rules->add_rule(buf.c_str(), deny, perms, audit == AUDIT_FORCE ? perms : 0,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0,
dfaflags))
goto fail;
}

19
parser/rule.h
View file

@ -70,6 +70,7 @@ typedef std::list<rule_t *> RuleList;
/* Not classes so they can be used in the bison front end */
typedef uint32_t perms_t;
typedef enum { AUDIT_UNSPECIFIED, AUDIT_FORCE, AUDIT_QUIET } audit_t;
typedef enum { RULE_UNSPECIFIED, RULE_ALLOW, RULE_DENY } rule_mode_t;
/* NOTE: we can not have a constructor for class prefixes. This is
* because it will break bison, and we would need to transition to
@ -80,7 +81,7 @@ typedef enum { AUDIT_UNSPECIFIED, AUDIT_FORCE, AUDIT_QUIET } audit_t;
class prefixes {
public:
audit_t audit;
int deny;
rule_mode_t rule_mode;
int owner;
ostream &dump(ostream &os)
@ -98,12 +99,16 @@ public:
output = false;
}
if (deny) {
switch (rule_mode) {
case RULE_DENY:
if (output)
os << " ";
os << "deny";
output = true;
break;
default:
break;
}
if (owner) {
@ -126,7 +131,7 @@ public:
{
/* Must construct prefix here see note on prefixes */
audit = AUDIT_UNSPECIFIED;
deny = 0;
rule_mode = RULE_UNSPECIFIED;
owner = 0;
};
@ -141,10 +146,10 @@ public:
return false;
}
}
if (p.deny && p.audit == AUDIT_FORCE) {
deny = 1;
} else if (p.deny) {
deny = 1;
if (p.rule_mode == RULE_DENY && p.audit == AUDIT_FORCE) {
rule_mode = RULE_DENY;
} else if (p.rule_mode == RULE_DENY) {
rule_mode = RULE_DENY;
audit = AUDIT_FORCE;
} else if (p.audit != AUDIT_UNSPECIFIED) {
audit = p.audit;

2
parser/signal.cc
View file

@ -289,7 +289,7 @@ int signal_rule::gen_policy_re(Profile &prof)
buf = buffer.str();
if (perms & (AA_MAY_SEND | AA_MAY_RECEIVE)) {
if (!prof.policy.rules->add_rule(buf.c_str(), deny, perms, audit == AUDIT_FORCE ? perms : 0,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY, perms, audit == AUDIT_FORCE ? perms : 0,
dfaflags))
goto fail;
}

2
parser/userns.cc
View file

@ -96,7 +96,7 @@ int userns_rule::gen_policy_re(Profile &prof)
buffer << "\\x" << std::setfill('0') << std::setw(2) << std::hex << AA_CLASS_NS;
buf = buffer.str();
if (perms & AA_VALID_USERNS_PERMS) {
if (!prof.policy.rules->add_rule(buf.c_str(), deny, perms,
if (!prof.policy.rules->add_rule(buf.c_str(), rule_mode == RULE_DENY, perms,
audit == AUDIT_FORCE ? perms : 0,
dfaflags))
goto fail;