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nvme: fix handling of metadata_len for NVME_IOCTL_IO_CMD 

[ Upstream commit 9b38276813 ]

The old code in nvme_user_cmd() passed the userspace virtual address
from nvme_passthru_cmd.metadata as the length of the metadata buffer
as well as the address to nvme_submit_user_cmd().

Fixes: 63263d60 ("nvme: Use metadata for passthrough commands")
Signed-off-by: Roland Dreier <roland@purestorage.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Roland Dreier 2018-07-19 20:07:59 -07:00 committed by Greg Kroah-Hartman
parent 0ee106583f
commit 7a12f4ed07
1 changed files with 1 additions and 1 deletions
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2
drivers/nvme/host/core.c
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@ -1016,7 +1016,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
(void __user *)(uintptr_t)cmd.addr, cmd.data_len,
(void __user *)(uintptr_t)cmd.metadata, cmd.metadata,
(void __user *)(uintptr_t)cmd.metadata, cmd.metadata_len,
0, &cmd.result, timeout);
if (status >= 0) {
if (put_user(cmd.result, &ucmd->result))