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The descriptor walk validation (dsze == 0 / past end of log) is unchanged from v1. ## Test plan - Build: make M=drivers/nvme -j12 (linux-next, verified) - Repro/validation (lab): Tested on linux-next 7.1.0-rc4-next-20260521 with QEMU 8.2 nvme-subsys,fdp=on. With a single FDP configuration (NUMFDPC field 0), forcing fdpcidx=1 triggers FDP invalid config descriptor list on the unfixed driver, while the fix rejects it early with FDP index:1 out of range:1 and skips stream registration. Thanks, liuxixin