From: sashiko-bot@kernel.org
To: "Hungyu Lin" <dennylin0707@gmail.com>
Cc: linux-rdma@vger.kernel.org
Subject: Re: [PATCH] RDMA/mlx5: Check the DM type before mapping a MEMIC operation
Date: Sun, 15 Nov 2026 10:47:56 +0000 [thread overview]
Message-ID: <sashiko-outbox-215409@kernel.org> (raw)
In-Reply-To: <20261115104342.56112-1-dennylin0707@gmail.com>
> MLX5_IB_METHOD_DM_MAP_OP_ADDR accepts a handle to any DM object and
> converts it with to_memic() without checking the DM type. The handle can
> refer to a SW ICM object, which is a struct mlx5_ib_dm_icm and is
> smaller than struct mlx5_ib_dm_memic.
>
> The handler then uses the ops_xa_lock, ops and ref members, which are
> all located past the end of the mlx5_ib_dm_icm allocation, so it locks
> and modifies memory that belongs to other slab objects.
>
> Return -EOPNOTSUPP for DM objects that are not MEMIC, as
> MLX5_IB_METHOD_DM_QUERY already does.
>
> Fixes: cea85fa5dbc2 ("RDMA/mlx5: Add support in MEMIC operations")
> Cc: stable@vger.kernel.org
> Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261115104342.56112-1-dennylin0707@gmail.com?part=1
prev parent reply other threads:[~2026-11-15 10:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-15 10:43 [PATCH] RDMA/mlx5: Check the DM type before mapping a MEMIC operation Hungyu Lin
2026-11-15 10:47 ` sashiko-bot [this message]
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