From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
linux-nvme@lists.infradead.org, Sagi Grimberg <sagi@grimberg.me>,
Chao Leng <lengchao@huawei.com>, Christoph Hellwig <hch@lst.de>
Subject: [PATCH AUTOSEL 5.8 132/132] nvme-rdma: fix crash when connect rejected
Date: Mon, 26 Oct 2020 19:52:04 -0400 [thread overview]
Message-ID: <20201026235205.1023962-132-sashal@kernel.org> (raw)
In-Reply-To: <20201026235205.1023962-1-sashal@kernel.org>
From: Chao Leng <lengchao@huawei.com>
[ Upstream commit 43efdb8e870ee0f58633fd579aa5b5185bf5d39e ]
A crash can happened when a connect is rejected. The host establishes
the connection after received ConnectReply, and then continues to send
the fabrics Connect command. If the controller does not receive the
ReadyToUse capsule, host may receive a ConnectReject reply.
Call nvme_rdma_destroy_queue_ib after the host received the
RDMA_CM_EVENT_REJECTED event. Then when the fabrics Connect command
times out, nvme_rdma_timeout calls nvme_rdma_complete_rq to fail the
request. A crash happenes due to use after free in
nvme_rdma_complete_rq.
nvme_rdma_destroy_queue_ib is redundant when handling the
RDMA_CM_EVENT_REJECTED event as nvme_rdma_destroy_queue_ib is already
called in connection failure handler.
Signed-off-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/rdma.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 4a0bc8927048a..99f627b0053f7 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1900,7 +1900,6 @@ static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id,
complete(&queue->cm_done);
return 0;
case RDMA_CM_EVENT_REJECTED:
- nvme_rdma_destroy_queue_ib(queue);
cm_error = nvme_rdma_conn_rejected(queue, ev);
break;
case RDMA_CM_EVENT_ROUTE_ERROR:
--
2.25.1
_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
parent reply other threads:[~2020-10-27 0:04 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20201026235205.1023962-1-sashal@kernel.org>]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201026235205.1023962-132-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=hch@lst.de \
--cc=lengchao@huawei.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nvme@lists.infradead.org \
--cc=sagi@grimberg.me \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox