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base/SOURCES/sudo-1.8.6p3-cycledetect.patch

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diff -up sudo-1.8.6p3/plugins/sudoers/alias.c.cycledetect sudo-1.8.6p3/plugins/sudoers/alias.c
--- sudo-1.8.6p3/plugins/sudoers/alias.c.cycledetect 2012-09-18 15:56:29.000000000 +0200
+++ sudo-1.8.6p3/plugins/sudoers/alias.c 2013-08-09 10:52:04.785860905 +0200
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2004-2005, 2007-2011
+ * Copyright (c) 2004-2005, 2007-2013
* Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
@@ -50,7 +50,6 @@
* Globals
*/
struct rbtree *aliases;
-unsigned int alias_seqno;
/*
* Comparison function for the red-black tree.
@@ -76,29 +75,31 @@ alias_compare(const void *v1, const void
/*
* Search the tree for an alias with the specified name and type.
* Returns a pointer to the alias structure or NULL if not found.
+ * Caller is responsible for calling alias_put() on the returned
+ * alias to mark it as unused.
*/
struct alias *
-alias_find(char *name, int type)
+alias_get(char *name, int type)
{
struct alias key;
struct rbnode *node;
struct alias *a = NULL;
- debug_decl(alias_find, SUDO_DEBUG_ALIAS)
+ debug_decl(alias_get, SUDO_DEBUG_ALIAS)
key.name = name;
key.type = type;
if ((node = rbfind(aliases, &key)) != NULL) {
/*
- * Compare the global sequence number with the one stored
- * in the alias. If they match then we've seen this alias
- * before and found a loop.
+ * Check whether this alias is already in use.
+ * If so, we've detected a loop. If not, set the flag,
+ * which the caller should clear with a call to alias_put().
*/
a = node->data;
- if (a->seqno == alias_seqno) {
+ if (a->used) {
errno = ELOOP;
debug_return_ptr(NULL);
}
- a->seqno = alias_seqno;
+ a->used = true;
} else {
errno = ENOENT;
}
@@ -106,6 +107,17 @@ alias_find(char *name, int type)
}
/*
+ * Clear the "used" flag in an alias once the caller is done with it.
+ */
+void
+alias_put(struct alias *a)
+{
+ debug_decl(alias_put, SUDO_DEBUG_ALIAS)
+ a->used = false;
+ debug_return;
+}
+
+/*
* Add an alias to the aliases redblack tree.
* Returns NULL on success and an error string on failure.
*/
@@ -119,7 +131,7 @@ alias_add(char *name, int type, struct m
a = ecalloc(1, sizeof(*a));
a->name = name;
a->type = type;
- /* a->seqno = 0; */
+ /* a->used = false; */
list2tq(&a->members, members);
if (rbinsert(aliases, a)) {
snprintf(errbuf, sizeof(errbuf), _("Alias `%s' already defined"), name);
diff -up sudo-1.8.6p3/plugins/sudoers/match.c.cycledetect sudo-1.8.6p3/plugins/sudoers/match.c
--- sudo-1.8.6p3/plugins/sudoers/match.c.cycledetect 2013-08-09 10:52:04.783860895 +0200
+++ sudo-1.8.6p3/plugins/sudoers/match.c 2013-08-09 10:52:04.785860905 +0200
@@ -101,13 +101,13 @@ static bool command_matches_normal(char
* Check for user described by pw in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
-static int
-_userlist_matches(struct passwd *pw, struct member_list *list)
+int
+userlist_matches(struct passwd *pw, struct member_list *list)
{
struct member *m;
struct alias *a;
int rval, matched = UNSPEC;
- debug_decl(_userlist_matches, SUDO_DEBUG_MATCH)
+ debug_decl(userlist_matches, SUDO_DEBUG_MATCH)
tq_foreach_rev(list, m) {
switch (m->type) {
@@ -123,10 +123,11 @@ _userlist_matches(struct passwd *pw, str
matched = !m->negated;
break;
case ALIAS:
- if ((a = alias_find(m->name, USERALIAS)) != NULL) {
- rval = _userlist_matches(pw, &a->members);
+ if ((a = alias_get(m->name, USERALIAS)) != NULL) {
+ rval = userlist_matches(pw, &a->members);
if (rval != UNSPEC)
matched = m->negated ? !rval : rval;
+ alias_put(a);
break;
}
/* FALLTHROUGH */
@@ -141,20 +142,13 @@ _userlist_matches(struct passwd *pw, str
debug_return_bool(matched);
}
-int
-userlist_matches(struct passwd *pw, struct member_list *list)
-{
- alias_seqno++;
- return _userlist_matches(pw, list);
-}
-
/*
* Check for user described by pw in a list of members.
* If both lists are empty compare against def_runas_default.
* Returns ALLOW, DENY or UNSPEC.
*/
-static int
-_runaslist_matches(struct member_list *user_list,
+int
+runaslist_matches(struct member_list *user_list,
struct member_list *group_list, struct member **matching_user,
struct member **matching_group)
{
@@ -163,7 +157,7 @@ _runaslist_matches(struct member_list *u
int rval;
int user_matched = UNSPEC;
int group_matched = UNSPEC;
- debug_decl(_runaslist_matches, SUDO_DEBUG_MATCH)
+ debug_decl(runaslist_matches, SUDO_DEBUG_MATCH)
if (runas_pw != NULL) {
/* If no runas user or runas group listed in sudoers, use default. */
@@ -184,11 +178,12 @@ _runaslist_matches(struct member_list *u
user_matched = !m->negated;
break;
case ALIAS:
- if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
- rval = _runaslist_matches(&a->members, &empty,
+ if ((a = alias_get(m->name, RUNASALIAS)) != NULL) {
+ rval = runaslist_matches(&a->members, &empty,
matching_user, NULL);
if (rval != UNSPEC)
user_matched = m->negated ? !rval : rval;
+ alias_put(a);
break;
}
/* FALLTHROUGH */
@@ -221,11 +216,12 @@ _runaslist_matches(struct member_list *u
group_matched = !m->negated;
break;
case ALIAS:
- if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
- rval = _runaslist_matches(&empty, &a->members,
+ if ((a = alias_get(m->name, RUNASALIAS)) != NULL) {
+ rval = runaslist_matches(&empty, &a->members,
NULL, matching_group);
if (rval != UNSPEC)
group_matched = m->negated ? !rval : rval;
+ alias_put(a);
break;
}
/* FALLTHROUGH */
@@ -253,27 +249,17 @@ _runaslist_matches(struct member_list *u
debug_return_int(UNSPEC);
}
-int
-runaslist_matches(struct member_list *user_list,
- struct member_list *group_list, struct member **matching_user,
- struct member **matching_group)
-{
- alias_seqno++;
- return _runaslist_matches(user_list ? user_list : &empty,
- group_list ? group_list : &empty, matching_user, matching_group);
-}
-
/*
* Check for host and shost in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
-static int
-_hostlist_matches(struct member_list *list)
+int
+hostlist_matches(struct member_list *list)
{
struct member *m;
struct alias *a;
int rval, matched = UNSPEC;
- debug_decl(_hostlist_matches, SUDO_DEBUG_MATCH)
+ debug_decl(hostlist_matches, SUDO_DEBUG_MATCH)
tq_foreach_rev(list, m) {
switch (m->type) {
@@ -289,10 +275,11 @@ _hostlist_matches(struct member_list *li
matched = !m->negated;
break;
case ALIAS:
- if ((a = alias_find(m->name, HOSTALIAS)) != NULL) {
- rval = _hostlist_matches(&a->members);
+ if ((a = alias_get(m->name, HOSTALIAS)) != NULL) {
+ rval = hostlist_matches(&a->members);
if (rval != UNSPEC)
matched = m->negated ? !rval : rval;
+ alias_put(a);
break;
}
/* FALLTHROUGH */
@@ -307,23 +294,16 @@ _hostlist_matches(struct member_list *li
debug_return_bool(matched);
}
-int
-hostlist_matches(struct member_list *list)
-{
- alias_seqno++;
- return _hostlist_matches(list);
-}
-
/*
* Check for cmnd and args in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
-static int
-_cmndlist_matches(struct member_list *list)
+int
+cmndlist_matches(struct member_list *list)
{
struct member *m;
int matched = UNSPEC;
- debug_decl(_cmndlist_matches, SUDO_DEBUG_MATCH)
+ debug_decl(cmndlist_matches, SUDO_DEBUG_MATCH)
tq_foreach_rev(list, m) {
matched = cmnd_matches(m);
@@ -333,13 +313,6 @@ _cmndlist_matches(struct member_list *li
debug_return_bool(matched);
}
-int
-cmndlist_matches(struct member_list *list)
-{
- alias_seqno++;
- return _cmndlist_matches(list);
-}
-
/*
* Check cmnd and args.
* Returns ALLOW, DENY or UNSPEC.
@@ -357,11 +330,11 @@ cmnd_matches(struct member *m)
matched = !m->negated;
break;
case ALIAS:
- alias_seqno++;
- if ((a = alias_find(m->name, CMNDALIAS)) != NULL) {
- rval = _cmndlist_matches(&a->members);
+ if ((a = alias_get(m->name, CMNDALIAS)) != NULL) {
+ rval = cmndlist_matches(&a->members);
if (rval != UNSPEC)
matched = m->negated ? !rval : rval;
+ alias_put(a);
}
break;
case COMMAND:
diff -up sudo-1.8.6p3/plugins/sudoers/parse.c.cycledetect sudo-1.8.6p3/plugins/sudoers/parse.c
--- sudo-1.8.6p3/plugins/sudoers/parse.c.cycledetect 2012-09-18 15:57:43.000000000 +0200
+++ sudo-1.8.6p3/plugins/sudoers/parse.c 2013-08-09 10:52:04.785860905 +0200
@@ -676,13 +676,14 @@ _print_member(struct lbuf *lbuf, char *n
}
break;
case ALIAS:
- if ((a = alias_find(name, alias_type)) != NULL) {
+ if ((a = alias_get(name, alias_type)) != NULL) {
tq_foreach_fwd(&a->members, m) {
if (m != tq_first(&a->members))
lbuf_append(lbuf, ", ");
_print_member(lbuf, m->name, m->type,
negated ? !m->negated : m->negated, alias_type);
}
+ alias_put(a);
break;
}
/* FALLTHROUGH */
@@ -697,6 +698,5 @@ static void
print_member(struct lbuf *lbuf, char *name, int type, int negated,
int alias_type)
{
- alias_seqno++;
_print_member(lbuf, name, type, negated, alias_type);
}
diff -up sudo-1.8.6p3/plugins/sudoers/parse.h.cycledetect sudo-1.8.6p3/plugins/sudoers/parse.h
--- sudo-1.8.6p3/plugins/sudoers/parse.h.cycledetect 2012-09-18 15:56:29.000000000 +0200
+++ sudo-1.8.6p3/plugins/sudoers/parse.h 2013-08-09 10:54:30.984565529 +0200
@@ -148,7 +148,7 @@ struct runascontainer {
struct alias {
char *name; /* alias name */
unsigned short type; /* {USER,HOST,RUNAS,CMND}ALIAS */
- unsigned short seqno; /* sequence number */
+ bool used; /* "used" flag for cycle detection */
struct member_list members; /* list of alias members */
};
@@ -170,35 +170,39 @@ struct defaults {
extern struct userspec_list userspecs;
extern struct defaults_list defaults;
-/*
- * Alias sequence number to avoid loops.
- */
-extern unsigned int alias_seqno;
-
-/*
- * Prototypes
- */
-char *alias_add(char *, int, struct member *);
-bool addr_matches(char *);
-int cmnd_matches(struct member *);
-int cmndlist_matches(struct member_list *);
-bool command_matches(char *, char *);
-int hostlist_matches(struct member_list *);
-bool hostname_matches(char *, char *, char *);
-bool netgr_matches(char *, char *, char *, char *);
+/* alias.c */
bool no_aliases(void);
-int runaslist_matches(struct member_list *, struct member_list *, struct member **, struct member **);
-int userlist_matches(struct passwd *, struct member_list *);
-bool usergr_matches(char *, char *, struct passwd *);
-bool userpw_matches(char *, char *, struct passwd *);
-bool group_matches(char *, struct group *);
-struct alias *alias_find(char *, int);
-struct alias *alias_remove(char *, int);
-void alias_free(void *);
-void alias_apply(int (*)(void *, void *), void *);
+char *alias_add(char *name, int type, struct member *members);
+int alias_compare(const void *a1, const void *a2);
+struct alias *alias_get(char *name, int type);
+struct alias *alias_remove(char *name, int type);
+void alias_apply(int (*func)(void *, void *), void *cookie);
+void alias_free(void *a);
+void alias_put(struct alias *a);
void init_aliases(void);
-void init_lexer(void);
+/* gram.c */
void init_parser(const char *, bool);
-int alias_compare(const void *, const void *);
+
+/* match_addr.c */
+bool addr_matches(char *n);
+
+/* match.c */
+bool command_matches(char *sudoers_cmnd, char *sudoers_args);
+bool group_matches(char *sudoers_group, struct group *gr);
+bool hostname_matches(char *shost, char *lhost, char *pattern);
+bool netgr_matches(char *netgr, char *lhost, char *shost, char *user);
+bool usergr_matches(char *group, char *user, struct passwd *pw);
+bool userpw_matches(char *sudoers_user, char *user, struct passwd *pw);
+int cmnd_matches(struct member *m);
+int cmndlist_matches(struct member_list *list);
+int hostlist_matches(struct member_list *list);
+int runaslist_matches(struct member_list *user_list, struct member_list *group_list, struct member **matching_user, struct member **matching_group);
+int userlist_matches(struct passwd *pw, struct member_list *list);
+
+/* toke.c */
+ void init_lexer(void);
+
+/* base64.c */
+ size_t base64_decode(const char *str, unsigned char *dst, size_t dsize);
#endif /* _SUDO_PARSE_H */
diff -up sudo-1.8.6p3/plugins/sudoers/visudo.c.cycledetect sudo-1.8.6p3/plugins/sudoers/visudo.c
--- sudo-1.8.6p3/plugins/sudoers/visudo.c.cycledetect 2013-08-09 10:52:04.759860779 +0200
+++ sudo-1.8.6p3/plugins/sudoers/visudo.c 2013-08-09 10:52:04.786860910 +0200
@@ -1084,7 +1084,6 @@ alias_remove_recursive(char *name, int t
}
rbinsert(alias_freelist, a);
}
- alias_seqno++;
debug_return_bool(rval);
}
@@ -1096,12 +1095,13 @@ check_alias(char *name, int type, int st
int errors = 0;
debug_decl(check_alias, SUDO_DEBUG_ALIAS)
- if ((a = alias_find(name, type)) != NULL) {
+ if ((a = alias_get(name, type)) != NULL) {
/* check alias contents */
tq_foreach_fwd(&a->members, m) {
if (m->type == ALIAS)
errors += check_alias(m->name, type, strict, quiet);
}
+ alias_put(a);
} else {
if (!quiet) {
char *fmt;
@@ -1146,26 +1146,22 @@ check_aliases(bool strict, bool quiet)
tq_foreach_fwd(&userspecs, us) {
tq_foreach_fwd(&us->users, m) {
if (m->type == ALIAS) {
- alias_seqno++;
errors += check_alias(m->name, USERALIAS, strict, quiet);
}
}
tq_foreach_fwd(&us->privileges, priv) {
tq_foreach_fwd(&priv->hostlist, m) {
if (m->type == ALIAS) {
- alias_seqno++;
errors += check_alias(m->name, HOSTALIAS, strict, quiet);
}
}
tq_foreach_fwd(&priv->cmndlist, cs) {
tq_foreach_fwd(&cs->runasuserlist, m) {
if (m->type == ALIAS) {
- alias_seqno++;
errors += check_alias(m->name, RUNASALIAS, strict, quiet);
}
}
if ((m = cs->cmnd)->type == ALIAS) {
- alias_seqno++;
errors += check_alias(m->name, CMNDALIAS, strict, quiet);
}
}
@@ -1176,7 +1172,6 @@ check_aliases(bool strict, bool quiet)
tq_foreach_fwd(&userspecs, us) {
tq_foreach_fwd(&us->users, m) {
if (m->type == ALIAS) {
- alias_seqno++;
if (!alias_remove_recursive(m->name, USERALIAS))
errors++;
}
@@ -1184,7 +1179,6 @@ check_aliases(bool strict, bool quiet)
tq_foreach_fwd(&us->privileges, priv) {
tq_foreach_fwd(&priv->hostlist, m) {
if (m->type == ALIAS) {
- alias_seqno++;
if (!alias_remove_recursive(m->name, HOSTALIAS))
errors++;
}
@@ -1192,13 +1186,11 @@ check_aliases(bool strict, bool quiet)
tq_foreach_fwd(&priv->cmndlist, cs) {
tq_foreach_fwd(&cs->runasuserlist, m) {
if (m->type == ALIAS) {
- alias_seqno++;
if (!alias_remove_recursive(m->name, RUNASALIAS))
errors++;
}
}
if ((m = cs->cmnd)->type == ALIAS) {
- alias_seqno++;
if (!alias_remove_recursive(m->name, CMNDALIAS))
errors++;
}
@@ -1225,7 +1217,6 @@ check_aliases(bool strict, bool quiet)
tq_foreach_fwd(&d->binding, binding) {
for (m = binding; m != NULL; m = m->next) {
if (m->type == ALIAS) {
- alias_seqno++;
if (!alias_remove_recursive(m->name, atype))
errors++;
}