From: sashiko-bot@kernel.org
To: "Prathamesh Deshpande" <prathameshdeshpande7@gmail.com>
Cc: linux-rdma@vger.kernel.org
Subject: Re: [PATCH net] net/mlx5: IPOIB, Fix QPN lookup race
Date: Fri, 30 Oct 2026 00:31:03 +0000 [thread overview]
Message-ID: <sashiko-outbox-190128@kernel.org> (raw)
In-Reply-To: <20261030002241.8508-1-prathameshdeshpande7@gmail.com>
> mlx5i_pkey_get_netdev() reads the QPN hash table without ht_lock,
> while mlx5i_pkey_del_qpn() removes entries under that lock and then
> frees them.
>
> PKEY child interfaces share the parent's RX resources, so RX lookups
> can overlap child removal and access a freed entry. A lookup for
> another QPN in the same bucket can also be affected.
>
> Hold ht_lock during lookup and save node->netdev before unlocking.
>
> Fixes: 7e7f4780c340 ("net/mlx5e: IPoIB, Use hash-table to map between QPN to child netdev")
> Signed-off-by: Prathamesh Deshpande <prathameshdeshpande7@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261030002241.8508-1-prathameshdeshpande7@gmail.com?part=1
prev parent reply other threads:[~2026-10-30 0:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 0:22 [PATCH net] net/mlx5: IPOIB, Fix QPN lookup race Prathamesh Deshpande
2026-10-30 0:29 ` netdev-bot+sinfo
2026-10-30 0:31 ` sashiko-bot [this message]
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