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nvme-rdma: fix double freeing of async event data

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[ Upstream commit 6344d02dc8 ]

Some error paths in configuration of admin queue free data buffer
associated with async request SQE without resetting the data buffer
pointer to NULL, This buffer is also freed up again if the controller
is shutdown or reset.

Signed-off-by: Prabhath Sajeepa <psajeepa@purestorage.com>
Reviewed-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Prabhath Sajeepa
2018-11-28 11:11:29 -07:00
committed by Greg Kroah-Hartman
parent 5893e48f8f
commit 992a773cb9
1 changed files with 2 additions and 0 deletions
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2
drivers/nvme/host/rdma.c
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@@ -184,6 +184,7 @@ static int nvme_rdma_alloc_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe,
qe->dma = ib_dma_map_single(ibdev, qe->data, capsule_size, dir);
if (ib_dma_mapping_error(ibdev, qe->dma)) {
kfree(qe->data);
qe->data = NULL;
return -ENOMEM;
}
@@ -816,6 +817,7 @@ out_free_tagset:
out_free_async_qe:
nvme_rdma_free_qe(ctrl->device->dev, &ctrl->async_event_sqe,
sizeof(struct nvme_command), DMA_TO_DEVICE);
ctrl->async_event_sqe.data = NULL;
out_free_queue:
nvme_rdma_free_queue(&ctrl->queues[0]);
return error;