linux-kernel - [PATCH v2] nvme: fix miss command type check

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Message-Id: <20230526170656.55303-1-min15.li@samsung.com>
Date:   Fri, 26 May 2023 17:06:56 +0000
From:   "min15.li" <min15.li@...sung.com>
To:     kbusch@...nel.org, axboe@...nel.dk, hch@....de, sagi@...mberg.me
Cc:     linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "min15.li" <min15.li@...sung.com>
Subject: [PATCH v2] nvme: fix miss command type check

In the function nvme_passthru_end(),only the value of the command opcode is
checked, without checking the command type (IO command or Admin command).
When we send a Dataset Management command (The opcode of the Dataset
Management command is the same as the Set Feature command),kernel
thinks it is a set feature command, then sets the controller's keep
 alive interval, and calls nvme_keep_alive_work().

Signed-off-by: min15.li <min15.li@...sung.com>
---
 drivers/nvme/host/core.c       | 4 +++-
 drivers/nvme/host/ioctl.c      | 2 +-
 drivers/nvme/host/nvme.h       | 2 +-
 drivers/nvme/target/passthru.c | 2 +-
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 1f0cbb77b249..c6cba1cc101c 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1115,7 +1115,7 @@ u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode)
 }
 EXPORT_SYMBOL_NS_GPL(nvme_passthru_start, NVME_TARGET_PASSTHRU);
 
-void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects,
+void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects,
 		       struct nvme_command *cmd, int status)
 {
 	if (effects & NVME_CMD_EFFECTS_CSE_MASK) {
@@ -1132,6 +1132,8 @@ void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects,
 		nvme_queue_scan(ctrl);
 		flush_work(&ctrl->scan_work);
 	}
+	if (ns)
+		return;
 
 	switch (cmd->common.opcode) {
 	case nvme_admin_set_features:
diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 81c5c9e38477..f15e7330b75a 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -254,7 +254,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
 	blk_mq_free_request(req);
 
 	if (effects)
-		nvme_passthru_end(ctrl, effects, cmd, ret);
+		nvme_passthru_end(ctrl, ns, effects, cmd, ret);
 
 	return ret;
 }
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index a2d4f59e0535..2dd52739236e 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -1077,7 +1077,7 @@ u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 			 u8 opcode);
 u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode);
 int nvme_execute_rq(struct request *rq, bool at_head);
-void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects,
+void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects,
 		       struct nvme_command *cmd, int status);
 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index 511c980d538d..71a9c1cc57f5 100644
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -243,7 +243,7 @@ static void nvmet_passthru_execute_cmd_work(struct work_struct *w)
 	blk_mq_free_request(rq);
 
 	if (effects)
-		nvme_passthru_end(ctrl, effects, req->cmd, status);
+		nvme_passthru_end(ctrl, ns, effects, req->cmd, status);
 }
 
 static enum rq_end_io_ret nvmet_passthru_req_done(struct request *rq,
-- 
2.34.1