linux-kernel - Re: [PATCH net v3 1/7] net/sched: act_gate: zero-initialize netlink dump struct

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <CANn89i+8_ZDxVGwQmo_44iCRs5Wexwxy1Wfhw4WmYg3qA7_t1A@mail.gmail.com>
Date: Wed, 21 Jan 2026 14:25:20 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: Paul Moses <p@....org>
Cc: netdev@...r.kernel.org, Jamal Hadi Salim <jhs@...atatu.com>, 
	Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko <jiri@...nulli.us>, 
	"David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Simon Horman <horms@...nel.org>, linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH net v3 1/7] net/sched: act_gate: zero-initialize netlink
 dump struct

On Wed, Jan 21, 2026 at 2:20 PM Paul Moses <p@....org> wrote:
>
> Zero-initialize the dump struct before selective assignment to avoid
> leaking stack padding in netlink replies. This matches other actions
> (e.g. act_connmark) that zero-init their dump structs.
>
> Fixes: a51c328df310 ("net: qos: introduce a gate control flow action")
> Cc: stable@...r.kernel.org
> Signed-off-by: Paul Moses <p@....org>
> ---

I do not see a bug to fix, current code is fine.

act_connmark problem was that "struct tc_connmark" had a 16bit hole.

No such issue for struct tc_gate.