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apparmor: fix change_hat not finding hat after policy replacement

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After a policy replacement, the task cred may be out of date and need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the out of date cred resulting in either: a stale profile being applied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: 01e2b670aa (failure to find hat)
Fixes: 898127c34e (stale policy being applied)
Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1000287
Cc: stable@vger.kernel.org
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
This commit is contained in:
John Johansen 2016-08-31 21:10:06 -07:00 committed by James Morris
parent 9c763584b7
commit 3d40658c97
1 changed files with 4 additions and 2 deletions
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6
security/apparmor/domain.c
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@ -621,8 +621,8 @@ 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";
@ -718,6 +718,8 @@ audit:
out:
aa_put_profile(hat);
kfree(name);
aa_put_profile(profile);
aa_put_profile(previous_profile);
put_cred(cred);
return error;