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nvme-pci: add missing condition check for existence of mapped data

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[ Upstream commit c31fad1470389666ac7169fe43aa65bf5b7e2cfd ]

nvme_map_data() is called when request has physical segments, hence
the nvme_unmap_data() should have same condition to avoid dereference.

Fixes: 4aedb705437f ("nvme-pci: split metadata handling from nvme_map_data / nvme_unmap_data")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Leon Romanovsky 2024-07-24 13:31:14 +03:00 committed by Greg Kroah-Hartman
parent 6c6c4b305f
commit d135c3352f
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/host/pci.c
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@ -910,7 +910,8 @@ static blk_status_t nvme_prep_rq(struct nvme_dev *dev, struct request *req)
blk_mq_start_request(req);
return BLK_STS_OK;
out_unmap_data:
nvme_unmap_data(dev, req);
if (blk_rq_nr_phys_segments(req))
nvme_unmap_data(dev, req);
out_free_cmd:
nvme_cleanup_cmd(req);
return ret;