linux-kernel - Re: RE: [EXT] [PATCH] ethernet: atheros: fix a memleak in atl1e_setup_ring

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <54c0af4f.28cff.18c487cab21.Coremail.alexious@zju.edu.cn>
Date:   Fri, 8 Dec 2023 16:12:59 +0800 (GMT+08:00)
From:   alexious@....edu.cn
To:     "Suman Ghosh" <sumang@...vell.com>
Cc:     "Jakub Kicinski" <kuba@...nel.org>,
        "Chris Snook" <chris.snook@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Eric Dumazet" <edumazet@...gle.com>,
        "Paolo Abeni" <pabeni@...hat.com>,
        "Simon Horman" <horms@...nel.org>,
        "Yuanjun Gong" <ruc_gongyuanjun@....com>,
        "Jie Yang" <jie.yang@...eros.com>,
        "Jeff Garzik" <jgarzik@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: RE: [EXT] [PATCH] ethernet: atheros: fix a memleak in
 atl1e_setup_ring_resources

> >On Thu, 7 Dec 2023 17:08:15 +0000 Suman Ghosh wrote:
> >> >+		kfree(tx_ring->tx_buffer);
> >>
> >> [Suman] I think we should do tx_ring->tx_buffer = NULL also, to avoid
> >use after free?
> >
> >It's up to the driver. Some may call that defensive programming.
> [Suman] Agree. I pointed it out since this driver is using this approach at other places. But sure, it is up to Zhipeng.

[Zhipeng] I think Suman's suggestion is valuable, it prevents potiential use-after-free and is consistent with other free operations in the same module.