diff options
Diffstat (limited to 'security/apparmor/include/label.h')
| -rw-r--r-- | security/apparmor/include/label.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/security/apparmor/include/label.h b/security/apparmor/include/label.h index 335f21930702..b5a722a47fd2 100644 --- a/security/apparmor/include/label.h +++ b/security/apparmor/include/label.h @@ -423,6 +423,38 @@ static inline struct aa_label *aa_get_newest_label(struct aa_label *l) return aa_get_label(l); } +/** + * aa_get_newest_label_condref - find the newest version of @l + * @l: the label to check for newer versions of + * @needput: returns whether the reference needs put + * + * Returns: refcounted newest version of @l taking into account + * replacement, renames and removals + * return @l. + */ +static inline struct aa_label *aa_get_newest_label_condref(struct aa_label *l, + bool *needput) +{ + if (l && unlikely(label_is_stale(l))) { + struct aa_label *tmp; + + AA_BUG(!l->proxy); + AA_BUG(!l->proxy->label); + /* BUG: only way this can happen is @l ref count and its + * replacement count have gone to 0 and are on their way + * to destruction. ie. we have a refcounting error + */ + tmp = aa_get_label_rcu(&l->proxy->label); + AA_BUG(!tmp); + + *needput = true; + return tmp; + } + + *needput = false; + return l; +} + static inline void aa_put_label(struct aa_label *l) { if (l) |