From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2B791FB4F for ; Tue, 1 Aug 2023 09:45:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77ED0C433C8; Tue, 1 Aug 2023 09:45:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1690883154; bh=C8CPlToll0mO6Xsty4yPamI+ndE0Kmvq9Rp7Mpadweo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DaTQwcstw3sYdDVZ1HuM9YOcSorNgH9w/fwbO0yBzpZ8OOK3GF4YtOpvD1rMwwASt DQF5V4/rkOW7K9IPTKM+Ammew+bu2H5+40eb6bqNnGxj0GB2g+2SlaChBQCEzKvigx CyVrUM8TQ2pzFrDujH4QfQcFz9GvcovviN3PixCM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stefano Garzarella , Ming Lei , Jens Axboe , Sasha Levin Subject: [PATCH 6.4 135/239] ublk: fail to recover device if queue setup is interrupted Date: Tue, 1 Aug 2023 11:19:59 +0200 Message-ID: <20230801091930.560422205@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230801091925.659598007@linuxfoundation.org> References: <20230801091925.659598007@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ming Lei [ Upstream commit 0c0cbd4ebc375ceebc75c89df04b74f215fab23a ] In ublk_ctrl_end_recovery(), if wait_for_completion_interruptible() is interrupted by signal, queues aren't setup successfully yet, so we have to fail UBLK_CMD_END_USER_RECOVERY, otherwise kernel oops can be triggered. Fixes: c732a852b419 ("ublk_drv: add START_USER_RECOVERY and END_USER_RECOVERY support") Reported-by: Stefano Garzarella Signed-off-by: Ming Lei Reviewed-by: Stefano Garzarella Link: https://lore.kernel.org/r/20230726144502.566785-3-ming.lei@redhat.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/block/ublk_drv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index dc2856d1241fc..bf0711894c0a2 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -2107,7 +2107,9 @@ static int ublk_ctrl_end_recovery(struct ublk_device *ub, pr_devel("%s: Waiting for new ubq_daemons(nr: %d) are ready, dev id %d...\n", __func__, ub->dev_info.nr_hw_queues, header->dev_id); /* wait until new ubq_daemon sending all FETCH_REQ */ - wait_for_completion_interruptible(&ub->completion); + if (wait_for_completion_interruptible(&ub->completion)) + return -EINTR; + pr_devel("%s: All new ubq_daemons(nr: %d) are ready, dev id %d\n", __func__, ub->dev_info.nr_hw_queues, header->dev_id); -- 2.40.1