CVE-2024-27435

In the Linux kernel, the following vulnerability has been resolved: nvme:
fix reconnection fail due to reserved tag allocation We found a issue on
production environment while using NVMe over RDMA, admin_q reconnect failed
forever while remote target and network is ok. After dig into it, we found
it may caused by a ABBA deadlock due to tag allocation. In my case, the tag
was hold by a keep alive request waiting inside admin_q, as we quiesced
admin_q while reset ctrl, so the request maked as idle and will not process
before reset success. As fabric_q shares tagset with admin_q, while
reconnect remote target, we need a tag for connect command, but the only
one reserved tag was held by keep alive command which waiting inside
admin_q. As a result, we failed to reconnect admin_q forever. In order to
fix this issue, I think we should keep two reserved tags for admin queue.