CVE-2026-93267 RDMA/core: Fix potential use after free in uverbs_free_dmah()

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in uverbsfreedmah When accessing a dmah via the netlink path the only synchronization mechanism for the said dmah is rdmarestrackget. Currently, rdmarestrackdel is invoked at the end of...