From: John Johansen Date: Thu, 1 Sep 2016 04:10:06 +0000 (-0700) Subject: apparmor: fix change_hat not finding hat after policy replacement X-Git-Tag: firefly_0821_release~176^2~4^2~10^2~12 X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=be79d7fa43f91c22e0e140c06aad57e9e5f417b2;p=firefly-linux-kernel-4.4.55.git apparmor: fix change_hat not finding hat after policy replacement commit 3d40658c977769ce2138f286cf131537bf68bdfe upstream. After a policy replacement, the task cred may be out of date and need to be updated. However change_hat is using the stale profiles from the out of date cred resulting in either: a stale profile being applied or, incorrect failure when searching for a hat profile as it has been migrated to the new parent profile. Fixes: 01e2b670aa898a39259bc85c78e3d74820f4d3b6 (failure to find hat) Fixes: 898127c34ec03291c86f4ff3856d79e9e18952bc (stale policy being applied) Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1000287 Signed-off-by: John Johansen Signed-off-by: James Morris Signed-off-by: Greg Kroah-Hartman --- diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c index dc0027b28b04..53426a6ee6dc 100644 --- a/security/apparmor/domain.c +++ b/security/apparmor/domain.c @@ -623,8 +623,8 @@ int aa_change_hat(const char *hats[], int count, u64 token, bool permtest) /* released below */ cred = get_current_cred(); cxt = cred_cxt(cred); - profile = aa_cred_profile(cred); - previous_profile = cxt->previous; + profile = aa_get_newest_profile(aa_cred_profile(cred)); + previous_profile = aa_get_newest_profile(cxt->previous); if (unconfined(profile)) { info = "unconfined"; @@ -720,6 +720,8 @@ audit: out: aa_put_profile(hat); kfree(name); + aa_put_profile(profile); + aa_put_profile(previous_profile); put_cred(cred); return error;