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authorJohn Johansen <john.johansen@canonical.com>2017-01-16 11:42:41 +0300
committerJohn Johansen <john.johansen@canonical.com>2017-01-16 12:18:33 +0300
commit6604d4c1c1a65d3d1a6a56291d96516d1e9b7041 (patch)
tree35db647541b41867c4031e986d510563c0cd160a /security/apparmor/policy_unpack.c
parent293a4886f93f1d4f01ef2642b81c2509a5376ce5 (diff)
downloadlinux-6604d4c1c1a65d3d1a6a56291d96516d1e9b7041.tar.xz
apparmor: allow policydb to be used as the file dfa
Newer policy will combine the file and policydb dfas, allowing for better optimizations. However to support older policy we need to keep the ability to address the "file" dfa separately. So dup the policydb as if it is the file dfa and set the appropriate start state. Signed-off-by: John Johansen <john.johansen@canonical.com>
Diffstat (limited to 'security/apparmor/policy_unpack.c')
-rw-r--r--security/apparmor/policy_unpack.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
index 6ac292fec55f..7160addb11be 100644
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -611,12 +611,16 @@ static struct aa_profile *unpack_profile(struct aa_ext *e)
error = PTR_ERR(profile->file.dfa);
profile->file.dfa = NULL;
goto fail;
+ } else if (profile->file.dfa) {
+ if (!unpack_u32(e, &profile->file.start, "dfa_start"))
+ /* default start state */
+ profile->file.start = DFA_START;
+ } else if (profile->policy.dfa &&
+ profile->policy.start[AA_CLASS_FILE]) {
+ profile->file.dfa = aa_get_dfa(profile->policy.dfa);
+ profile->file.start = profile->policy.start[AA_CLASS_FILE];
}
- if (!unpack_u32(e, &profile->file.start, "dfa_start"))
- /* default start state */
- profile->file.start = DFA_START;
-
if (!unpack_trans_table(e, profile))
goto fail;