[PATCH] nvmet: Identify-Active Namespace ID List command should reject invalid nsid

[Maurizio Lombardi]

nsid values of 0xFFFFFFFE and 0XFFFFFFFF should be rejected with
a status code of "Invalid Namespace or Format".
See NVMe Base Specification, Active Namespace ID list (CNS 02h).

Fixes: a07b4970f464 ("nvmet: add a generic NVMe target")
Signed-off-by: Maurizio Lombardi <mlombard at redhat.com>
---
 drivers/nvme/target/admin-cmd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index f7e1156ac7ec..d37bb1cb94fa 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -587,6 +587,12 @@ static void nvmet_execute_identify_nslist(struct nvmet_req *req)
 	u16 status = 0;
 	int i = 0;
 
+	if (min_nsid >= NVME_NSID_ALL - 1) {
+		req->error_loc = offsetof(struct nvme_identify, nsid);
+		status = NVME_SC_INVALID_NS | NVME_STATUS_DNR;
+		goto out;
+	}
+
 	list = kzalloc(buf_size, GFP_KERNEL);
 	if (!list) {
 		status = NVME_SC_INTERNAL;
-- 
2.43.5