linux-kernel - CVE-2016-7097 causes acl leak

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Message-ID: <bb7177d2-08dc-d75c-9012-26e3b2888461@android.com>
Date:   Mon, 5 Dec 2016 09:16:31 -0800
From:   Mark Salyzyn <salyzyn@...roid.com>
To:     LKML <linux-kernel@...r.kernel.org>
Subject: CVE-2016-7097 causes acl leak

Commit 073931017b49d9458aa351605b43a7e34598caef has several occurrences 
of an acl leak.

posix_acl_update_mode(inose, &mode, &acl);

. . .

posix_acl_release(acl);

acl is NULLed in posix_acl_update_mode to signal caller to not update 
the acl; but because it is nulled, it is never released.

Sincerely -- Mark Salyzyn