From 3ddae9876a7045a8d08ab372eff232a5da5199b8 Mon Sep 17 00:00:00 2001 From: John Johansen Date: Fri, 13 Apr 2018 22:33:10 -0700 Subject: apparmor: fix memory leak when deduping profile load AppArmor is leaking the newly loaded profile and its proxy when the profile is an exact match to the currently loaded version. In this case the dedup check results in the profile being skipped and put without dealing with the proxy ref thus not breaking a circular refcount and causing a leak. BugLink: http://bugs.launchpad.net/bugs/1750594 Fixes: 5d5182cae401 ("apparmor: move to per loaddata files, instead of replicating in profiles") Signed-off-by: John Johansen --- security/apparmor/policy.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/security/apparmor/policy.c b/security/apparmor/policy.c index b367fef33d03..1590e2de4e84 100644 --- a/security/apparmor/policy.c +++ b/security/apparmor/policy.c @@ -1008,6 +1008,9 @@ ssize_t aa_replace_profiles(struct aa_ns *policy_ns, struct aa_label *label, audit_policy(label, op, ns_name, ent->new->base.hname, "same as current profile, skipping", error); + /* break refcount cycle with proxy. */ + aa_put_proxy(ent->new->label.proxy); + ent->new->label.proxy = NULL; goto skip; } -- cgit v1.2.3