From: David Marchand <david.marchand@redhat.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: dev@dpdk.org, chenbox@nvidia.com, stable@dpdk.org
Subject: Re: [PATCH 1/3] vhost: fix virtqueue array size for control queue
Date: Thu, 8 Jan 2026 15:48:19 +0100 [thread overview]
Message-ID: <CAJFAV8yXDX0t9oudVE1k8SR_qtAMj9jT4=JOP5Q_vRbGTtxSrg@mail.gmail.com> (raw)
In-Reply-To: <20260108134951.3857110-2-maxime.coquelin@redhat.com>
On Thu, 8 Jan 2026 at 14:50, Maxime Coquelin <maxime.coquelin@redhat.com> wrote:
>
> When max_queue_pairs is set to VHOST_MAX_QUEUE_PAIRS (128), VDUSE
> calculates total_queues as max_queue_pairs * 2 + 1 = 257 to account
> for the control queue. However, the virtqueue array was sized as
> VHOST_MAX_QUEUE_PAIRS * 2, causing an out-of-bounds array access.
>
> Fix by defining VHOST_MAX_VRING to explicitly account for the control
> queue (VHOST_MAX_QUEUE_PAIRS * 2 + 1) and using it for the virtqueue
> array size.
>
> Fixes: f0a37cc6a1e2 ("vhost: add multiqueue support to VDUSE")
> Cc: stable@dpdk.org
>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
--
David Marchand
next prev parent reply other threads:[~2026-01-08 14:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-08 13:49 [PATCH 0/3] vhost: VDUSE-related fixes Maxime Coquelin
2026-01-08 13:49 ` [PATCH 1/3] vhost: fix virtqueue array size for control queue Maxime Coquelin
2026-01-08 14:48 ` David Marchand [this message]
2026-01-08 13:49 ` [PATCH 2/3] vhost: fix descriptor chain bounds check in " Maxime Coquelin
2026-01-08 14:52 ` David Marchand
2026-01-08 13:49 ` [PATCH 3/3] vhost: fix mmap error check in VDUSE IOTLB miss handler Maxime Coquelin
2026-01-08 14:49 ` David Marchand
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