nvme-fc: release admin tagset if init fails

In the Linux kernel, the following vulnerability has been resolved:

nvme-fc: release admin tagset if init fails

nvme_fabrics creates an NVMe/FC controller in following path:

nvmf_dev_write()

-> nvmf_create_ctrl()

-> nvme_fc_create_ctrl()

-> nvme_fc_init_ctrl()

nvme_fc_init_ctrl() allocates the admin blk-mq resources right after

nvme_add_ctrl() succeeds. If any of the subsequent steps fail (changing

the controller state, scheduling connect work, etc.), we jump to the

fail_ctrl path, which tears down the controller references but never

frees the admin queue/tag set. The leaked blk-mq allocations match the

kmemleak report seen during blktests nvme/fc.

Check ctrl->ctrl.admin_tagset in the fail_ctrl path and call

nvme_remove_admin_tag_set() when it is set so that all admin queue

allocations are reclaimed whenever controller setup aborts.