From: Jens Axboe <axboe@kernel.dk>
To: josef@toxicpanda.com, Zheng Qixing <zhengqixing@huaweicloud.com>
Cc: linux-block@vger.kernel.org, nbd@other.debian.org,
linux-kernel@vger.kernel.org, yi.zhang@huawei.com,
yangerkun@huawei.com, houtao1@huawei.com,
zhengqixing@huawei.com
Subject: Re: [PATCH] nbd: defer config unlock in nbd_genl_connect
Date: Tue, 11 Nov 2025 07:55:02 -0700 [thread overview]
Message-ID: <176287290263.173215.8003110522218932458.b4-ty@kernel.dk> (raw)
In-Reply-To: <20251110124920.1333561-1-zhengqixing@huaweicloud.com>
On Mon, 10 Nov 2025 20:49:20 +0800, Zheng Qixing wrote:
> There is one use-after-free warning when running NBD_CMD_CONNECT and
> NBD_CLEAR_SOCK:
>
> nbd_genl_connect
> nbd_alloc_and_init_config // config_refs=1
> nbd_start_device // config_refs=2
> set NBD_RT_HAS_CONFIG_REF open nbd // config_refs=3
> recv_work done // config_refs=2
> NBD_CLEAR_SOCK // config_refs=1
> close nbd // config_refs=0
> refcount_inc -> uaf
>
> [...]
Applied, thanks!
[1/1] nbd: defer config unlock in nbd_genl_connect
commit: 1649714b930f9ea6233ce0810ba885999da3b5d4
Best regards,
--
Jens Axboe
prev parent reply other threads:[~2025-11-11 14:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-10 12:49 Zheng Qixing
2025-11-11 14:01 ` Yu Kuai
2025-11-11 14:55 ` Jens Axboe [this message]
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