From: Christoph Hellwig <hch@lst.de>
Date: Tue, 20 Sep 2022 15:37:18 +0200
Subject: nvmet-auth: don't try to cancel a non-initialized work_struct
Patch-mainline: v6.1-rc1
Git-commit: 1befd944e05050d76950014f3dc04ed47faba2c3
References: git-fixes

Currently blktests nvme/002 trips up debugobjects if CONFIG_NVME_AUTH is
enabled, but authentication is not on a queue.  This is because
nvmet_auth_sq_free cancels sq->auth_expired_work unconditionaly, while
auth_expired_work is only ever initialized if authentication is enabled
for a given controller.

Fix this by calling most of what is nvmet_init_auth unconditionally
when initializing the SQ, and just do the setting of the result
field in the connect command handler.

Fixes: db1312dd9548 ("nvmet: implement basic In-Band Authentication")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/nvme/target/core.c             |    1 +
 drivers/nvme/target/fabrics-cmd-auth.c |   13 ++++---------
 drivers/nvme/target/fabrics-cmd.c      |    6 ++++--
 drivers/nvme/target/nvmet.h            |    7 ++++---
 4 files changed, 13 insertions(+), 14 deletions(-)

--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -829,6 +829,7 @@ int nvmet_sq_init(struct nvmet_sq *sq)
 	}
 	init_completion(&sq->free_done);
 	init_completion(&sq->confirm_done);
+	nvmet_auth_sq_init(sq);
 
 	return 0;
 }
--- a/drivers/nvme/target/fabrics-cmd-auth.c
+++ b/drivers/nvme/target/fabrics-cmd-auth.c
@@ -23,17 +23,12 @@ static void nvmet_auth_expired_work(stru
 	sq->dhchap_tid = -1;
 }
 
-void nvmet_init_auth(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
+void nvmet_auth_sq_init(struct nvmet_sq *sq)
 {
-	u32 result = le32_to_cpu(req->cqe->result.u32);
-
 	/* Initialize in-band authentication */
-	INIT_DELAYED_WORK(&req->sq->auth_expired_work,
-			  nvmet_auth_expired_work);
-	req->sq->authenticated = false;
-	req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE;
-	result |= (u32)NVME_CONNECT_AUTHREQ_ATR << 16;
-	req->cqe->result.u32 = cpu_to_le32(result);
+	INIT_DELAYED_WORK(&sq->auth_expired_work, nvmet_auth_expired_work);
+	sq->authenticated = false;
+	sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE;
 }
 
 static u16 nvmet_auth_negotiate(struct nvmet_req *req, void *d)
--- a/drivers/nvme/target/fabrics-cmd.c
+++ b/drivers/nvme/target/fabrics-cmd.c
@@ -255,7 +255,8 @@ static void nvmet_execute_admin_connect(
 	req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid);
 
 	if (nvmet_has_auth(ctrl))
-		nvmet_init_auth(ctrl, req);
+		req->cqe->result.u32 |=
+			cpu_to_le32((u32)NVME_CONNECT_AUTHREQ_ATR << 16);
 out:
 	kfree(d);
 complete:
@@ -317,7 +318,8 @@ static void nvmet_execute_io_connect(str
 	pr_debug("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid);
 	req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid);
 	if (nvmet_has_auth(ctrl))
-		nvmet_init_auth(ctrl, req);
+		req->cqe->result.u32 |=
+			cpu_to_le32((u32)NVME_CONNECT_AUTHREQ_ATR << 16);
 
 out:
 	kfree(d);
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -702,7 +702,7 @@ int nvmet_auth_set_key(struct nvmet_host
 		       bool set_ctrl);
 int nvmet_auth_set_host_hash(struct nvmet_host *host, const char *hash);
 int nvmet_setup_auth(struct nvmet_ctrl *ctrl);
-void nvmet_init_auth(struct nvmet_ctrl *ctrl, struct nvmet_req *req);
+void nvmet_auth_sq_init(struct nvmet_sq *sq);
 void nvmet_destroy_auth(struct nvmet_ctrl *ctrl);
 void nvmet_auth_sq_free(struct nvmet_sq *sq);
 int nvmet_setup_dhgroup(struct nvmet_ctrl *ctrl, u8 dhgroup_id);
@@ -724,8 +724,9 @@ static inline int nvmet_setup_auth(struc
 {
 	return 0;
 }
-static inline void nvmet_init_auth(struct nvmet_ctrl *ctrl,
-				   struct nvmet_req *req) {};
+static inline void nvmet_auth_sq_init(struct nvmet_sq *sq)
+{
+}
 static inline void nvmet_destroy_auth(struct nvmet_ctrl *ctrl) {};
 static inline void nvmet_auth_sq_free(struct nvmet_sq *sq) {};
 static inline bool nvmet_check_auth_status(struct nvmet_req *req)