5.15-stable review patch. If anyone has any objections, please let me know.
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From: Leon Romanovsky leonro@nvidia.com
[ 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 --- drivers/nvme/host/pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 01f16989d0d84..1df3e083f3c67 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -914,7 +914,8 @@ 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;