linux-kernel - Re: [PATCH 11/20] ethernet: ucc_geth: fix use-after-free in ucc_geth

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Message-ID: <e5c1443b-1582-51b8-f863-4eab6e9d1475@prevas.dk>
Date:   Sat, 5 Dec 2020 22:50:26 +0100
From:   Rasmus Villemoes <rasmus.villemoes@...vas.dk>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Li Yang <leoyang.li@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Zhao Qiang <qiang.zhao@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        netdev@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/20] ethernet: ucc_geth: fix use-after-free in
 ucc_geth_remove()


> I only noticed because I needed to add a free of the ug_info in a later
> patch.

Where, ironically, I add a use-after-free bug by freeing ug_info before
the ucc_geth_memclean() call.

:facepalm: