CVE-2021-47130

In the Linux kernel, the following vulnerability has been resolved: nvmet:
fix freeing unallocated p2pmem In case p2p device was found but the p2p
pool is empty, the nvme target is still trying to free the sgl from the p2p
pool instead of the regular sgl pool and causing a crash (BUG() is called).
Instead, assign the p2p_dev for the request only if it was allocated from
p2p pool. This is the crash that was caused: [Sun May 30 19:13:53 2021]
------------[ cut here ]------------ [Sun May 30 19:13:53 2021] kernel BUG
at lib/genalloc.c:518! [Sun May 30 19:13:53 2021] invalid opcode: 0000 [#1]
SMP PTI … [Sun May 30 19:13:53 2021] kernel BUG at lib/genalloc.c:518!
… [Sun May 30 19:13:53 2021] RIP: 0010:gen_pool_free_owner+0xa8/0xb0 …
[Sun May 30 19:13:53 2021] Call Trace: [Sun May 30 19:13:53 2021]
------------[ cut here ]------------ [Sun May 30 19:13:53 2021]
pci_free_p2pmem+0x2b/0x70 [Sun May 30 19:13:53 2021]
pci_p2pmem_free_sgl+0x4f/0x80 [Sun May 30 19:13:53 2021]
nvmet_req_free_sgls+0x1e/0x80 [nvmet] [Sun May 30 19:13:53 2021] kernel BUG
at lib/genalloc.c:518! [Sun May 30 19:13:53 2021]
nvmet_rdma_release_rsp+0x4e/0x1f0 [nvmet_rdma] [Sun May 30 19:13:53 2021]
nvmet_rdma_send_done+0x1c/0x60 [nvmet_rdma]