From: Jianchao Wang <jianchao.w.wang@oracle.com>
Date: Thu, 24 May 2018 09:27:38 +0800
Subject: [PATCH] nvme-rdma: stop admin queue before freeing it
Git-commit: 2e050f00a0f0e07467050cb4afae0234941e5bf3
Patch-Mainline: v4.18
References: bsc#1104967,bsc#1140155,FATE#325924
For any failure after nvme_rdma_start_queue in
nvme_rdma_configure_admin_queue, the admin queue will be freed with the
NVME_RDMA_Q_LIVE flag still set. Once nvme_rdma_stop_queue is invoked,
that will cause a use-after-free.
BUG: KASAN: use-after-free in rdma_disconnect+0x1f/0xe0 [rdma_cm]
To fix it, call nvme_rdma_stop_queue for all the failed cases after
nvme_rdma_start_queue.
Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Suggested-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/nvme/host/rdma.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 1eb4438a8763..2181299ce8f5 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -778,7 +778,7 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
if (error) {
dev_err(ctrl->ctrl.device,
"prop_get NVME_REG_CAP failed\n");
- goto out_cleanup_queue;
+ goto out_stop_queue;
}
ctrl->ctrl.sqsize =
@@ -786,23 +786,25 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap);
if (error)
- goto out_cleanup_queue;
+ goto out_stop_queue;
ctrl->ctrl.max_hw_sectors =
(ctrl->max_fr_pages - 1) << (ilog2(SZ_4K) - 9);
error = nvme_init_identify(&ctrl->ctrl);
if (error)
- goto out_cleanup_queue;
+ goto out_stop_queue;
error = nvme_rdma_alloc_qe(ctrl->queues[0].device->dev,
&ctrl->async_event_sqe, sizeof(struct nvme_command),
DMA_TO_DEVICE);
if (error)
- goto out_cleanup_queue;
+ goto out_stop_queue;
return 0;
+out_stop_queue:
+ nvme_rdma_stop_queue(&ctrl->queues[0]);
out_cleanup_queue:
if (new)
blk_cleanup_queue(ctrl->ctrl.admin_q);
--
2.16.4