From: sashiko-bot@kernel.org
To: "Jianlin Shi" <shijianlin11@foxmail.com>
Cc: virtualization@lists.linux.dev,
"Michael S. Tsirkin" <mst@redhat.com>,
"Eugenio Perez" <eperezma@redhat.com>
Subject: Re: [PATCH 1/2] dim: clear irq_moder on init failure
Date: Wed, 30 Sep 2026 08:33:44 +0000 [thread overview]
Message-ID: <20260930083344.E8C951F000FF@smtp.kernel.org> (raw)
In-Reply-To: <8d6a637142c411f83771fda5b57bb4451651488b.1790751008.git.shijianlin11@foxmail.com>
> net_dim_init_irq_moder() publishes the allocated object in
> dev->irq_moder before copying the moderation profiles. If kmemdup()
> fails, the object is freed but the pointer is left dangling.
> net_dim_free_irq_moder() treats a non-NULL irq_moder as live, so a
> caller unwinding the failure path would use-after-free.
>
> NULL the pointer after freeing it. On error the device is left as if
> initialization never happened.
>
> Fixes: f750dfe825b90 ("ethtool: provide customized dim profile management")
> Signed-off-by: Jianlin Shi <shijianlin11@foxmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/cover.1790751008.git.shijianlin11@foxmail.com?part=1
next prev parent reply other threads:[~2026-09-30 8:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 8:19 [PATCH 0/2] virtio-net/dim: fix irq moderation init failure unwind Jianlin Shi
2026-09-30 8:19 ` [PATCH 1/2] dim: clear irq_moder on init failure Jianlin Shi
2026-09-30 8:33 ` sashiko-bot [this message]
2026-10-06 1:53 ` Jakub Kicinski
2026-10-08 15:42 ` Jianlin Shi
2026-09-30 8:19 ` [PATCH 2/2] virtio-net: unwind VQs when irq moderation init fails Jianlin Shi
2026-09-30 8:33 ` sashiko-bot
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