From: sashiko-bot@kernel.org
To: "Changyul Lee" <lcy8047@gmail.com>
Cc: linux-rdma@vger.kernel.org
Subject: Re: [PATCH] RDMA/cm: Read the remote_id_table root under cm.lock
Date: Wed, 11 Nov 2026 20:08:32 +0000 [thread overview]
Message-ID: <sashiko-outbox-209609@kernel.org> (raw)
In-Reply-To: <20261111191913.98044-1-lcy8047@gmail.com>
> cm_find_remote_id() reads the root of cm.remote_id_table before it
> takes cm.lock. While it waits for the lock, cm_destroy_id() or
> cm_reset_to_idle() on another CPU can remove that cm_timewait_info from
> the tree and free it, and the lookup then starts from freed memory.
> This lookup is done for a REJ with reason IB_CM_REJ_TIMEOUT.
>
> Read the root after taking cm.lock.
>
> Fixes: cfa68b0d0440 ("RDMA/cm: Make find_remote_id() return a cm_id_private")
> Signed-off-by: Changyul Lee <lcy8047@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261111191913.98044-1-lcy8047@gmail.com?part=1
prev parent reply other threads:[~2026-11-11 20:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-11 19:19 [PATCH] RDMA/cm: Read the remote_id_table root under cm.lock Changyul Lee
2026-11-11 20:08 ` sashiko-bot [this message]
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