nvmet-passthru: Reject commands with non-sgl flags set

Any command with a non-SGL flag set (like fuse flags) should be
rejected.

Fixes: c1fef73f793b ("nvmet: add passthru code to process commands")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index 89d91dc..f69c3ac 100644 (file)
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -326,6 +326,10 @@ static u16 nvmet_setup_passthru_command(struct nvmet_req *req)
 
 u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req)
 {
+       /* Reject any commands with non-sgl flags set (ie. fused commands) */
+       if (req->cmd->common.flags & ~NVME_CMD_SGL_ALL)
+               return NVME_SC_INVALID_FIELD;
+
        switch (req->cmd->common.opcode) {
        case nvme_cmd_resv_register:
        case nvme_cmd_resv_report:
@@ -396,6 +400,10 @@ static u16 nvmet_passthru_get_set_features(struct nvmet_req *req)
 
 u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req)
 {
+       /* Reject any commands with non-sgl flags set (ie. fused commands) */
+       if (req->cmd->common.flags & ~NVME_CMD_SGL_ALL)
+               return NVME_SC_INVALID_FIELD;
+
        /*
         * Passthru all vendor specific commands
         */