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apparmor: fix change_hat not finding hat after policy replacement

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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After a policy replacement, the task cred may be out of date and need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the out of date cred resulting in either: a stale profile being applied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 <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
John Johansen 2016-08-31 21:10:06 -07:00 committed by Greg Kroah-Hartman
parent 8316338a20
commit be79d7fa43
1 changed files with 4 additions and 2 deletions
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6
security/apparmor/domain.c
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@ -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;