From: Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>
To: Konstantin Khorenko <khorenko@virtuozzo.com>,
OpenVZ devel list <devel@openvz.org>
Cc: "Denis V. Lunev" <den@virtuozzo.com>
Subject: Re: [Devel] [PATCH vz7] ms/bridge: stp: Fix a potential use-after-free when deleting a bridge
Date: Mon, 14 Sep 2026 10:23:57 +0200 [thread overview]
Message-ID: <e6478d18-d2bd-4fac-916a-2339e36530d9@virtuozzo.com> (raw)
In-Reply-To: <20260911161054.2251394-1-khorenko@virtuozzo.com>
On 9/11/26 6:10 PM, Konstantin Khorenko wrote:
> From: Ido Schimmel <idosch@nvidia.com>
>
> The three STP timers are not supposed to be armed while the bridge is
> administratively down. They are synchronously deactivated when the
> bridge is put administratively down and the various call sites check for
> 'IFF_UP' before arming them.
>
> This check is missing from br_topology_change_detection() and it is
> possible to engineer a situation in which the topology change timer is
> armed while the bridge is administratively down, resulting in a
> use-after-free [1] when the bridge is deleted.
>
> [...]
Reviewed-by: Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>
--
Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>
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prev parent reply other threads:[~2026-09-14 8:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-11 16:10 Konstantin Khorenko
2026-09-11 17:17 ` Vladimir Riabchun
2026-09-14 8:23 ` Vasileios Almpanis [this message]
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