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authorAmit Engel <amit.engel@dell.com>2020-02-29 16:28:41 -0800
committerKeith Busch <kbusch@kernel.org>2020-03-26 04:47:03 +0900
commit6d525f9755c2ce444de2f3d604d41fbe4df91a8c (patch)
treede469a85da6ab83ec40051e1006ea96ce52772cc
parent3e98c2443f5c7f127b5b7492a3089e92a1c85112 (diff)
downloadlinux-6d525f9755c2ce444de2f3d604d41fbe4df91a8c.tar.bz2
nvmet: check ncqr & nsqr for set-features cmd
For set feature command when setting up NVME_FEAT_NUM_QUEUES, check Number of I/O Completion Queues Requested (NCQR) and Number of I/O Submission Queues Requested (NSQR) before we proceed, for invalid values (i.e. 65535) return an appropriate NVMe invalid field status. Signed-off-by: Amit Engel <Amit.Engel@dell.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
-rw-r--r--drivers/nvme/target/admin-cmd.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 19f949570625..c0aa9c34c699 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -733,13 +733,22 @@ static void nvmet_execute_set_features(struct nvmet_req *req)
{
struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
+ u32 cdw11 = le32_to_cpu(req->cmd->common.cdw11);
u16 status = 0;
+ u16 nsqr;
+ u16 ncqr;
if (!nvmet_check_data_len(req, 0))
return;
switch (cdw10 & 0xff) {
case NVME_FEAT_NUM_QUEUES:
+ ncqr = (cdw11 >> 16) & 0xffff;
+ nsqr = cdw11 & 0xffff;
+ if (ncqr == 0xffff || nsqr == 0xffff) {
+ status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
+ break;
+ }
nvmet_set_result(req,
(subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16));
break;