From: sashiko-bot@kernel.org
To: "Wentao Liang" <vulab@iscas.ac.cn>
Cc: linux-rdma@vger.kernel.org
Subject: Re: [PATCH] RDMA/core: Fix member use-after-free in process_group_error()
Date: Wed, 16 Sep 2026 18:55:45 +0000 [thread overview]
Message-ID: <20260916185545.D00F21F0089B@smtp.kernel.org> (raw)
In-Reply-To: <20260916184555.2093238-1-vulab@iscas.ac.cn>
> If the callback on the error path returns non-zero after a concurrent
> ib_sa_free_multicast() already dropped the initial member reference,
> dropping our temporary reference completes the waiter, which then frees
> the member before ib_sa_free_multicast() dereferences it again.
>
> Only free the multicast member when our reference decrement was not
> the last one; otherwise the concurrent free is already in flight.
>
> Fixes: faec2f7b96b5 ("IB/sa: Track multicast join/leave requests")
> Cc: stable@vger.kernel.org
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260916184555.2093238-1-vulab@iscas.ac.cn?part=1
next prev parent reply other threads:[~2026-09-16 18:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 18:45 [PATCH] RDMA/core: Fix member use-after-free in process_group_error() Wentao Liang
2026-09-16 18:55 ` sashiko-bot [this message]
2026-09-23 8:47 ` Leon Romanovsky
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