{
  "finding_id": "DF-3802",
  "status": "not_reproduced",
  "reproduced": 0,
  "impact": "none",
  "confidence": "likely",
  "verdict": "mprsas_send_abort (mpr_sas.c:1609-1615) and mprsas_send_reset (mpr_sas.c:1456-1461,1489-1492) return -1 on a zero dev handle without freeing the TM or clearing targ->tm; all callers (mpr_sas.c:1351,1365,1584,1594,1731) ignore the return. The TM never completes, so targ->tm is never cleared (only completion handlers clear it), every later timeout on the target queues into timedout_commands forever (mpr_sas.c:1716-1722), and the triggering ccb is never returned to CAM — an unkillable I/O hang plus a high-priority-command leak. Provable trigger: mprsas_remove_volume clears targ->handle (mpr_sas.c:414) without draining targ->commands (unlike mprsas_remove_device at mpr_sas.c:621-628), so outstanding volume I/O that times out afterwards hits the -1 path. Not reproduced: guest has no SAS3 HBA (env.txt); mpr SIM never attaches.",
  "exploit_chain": "",
  "evidence": "VERDICT.md (path:line proof incl. remove_volume asymmetry), env.txt, fix.diff",
  "kernel_refs": [
    "sys/dev/raid/mpr/mpr_sas.c:1609",
    "sys/dev/raid/mpr/mpr_sas.c:1456",
    "sys/dev/raid/mpr/mpr_sas.c:1731",
    "sys/dev/raid/mpr/mpr_sas.c:1716",
    "sys/dev/raid/mpr/mpr_sas.c:414",
    "sys/dev/raid/mpr/mpr_sas.c:621"
  ],
  "poc_changes": "Trigger needs real SAS3 hardware with a failing/removed device racing CAM timeouts.",
  "attempts": 1,
  "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul 2 06:02:54 UTC 2026 root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64",
  "runtime_sec": 20,
  "guest_dirty": 0,
  "build_cmd": "n/a",
  "run_cmd": "sh findings/poc/DF-3802/run.sh",
  "code_hash": "",
  "notes": "Upstream FreeBSD mpr(4) shares this defect.",
  "recommended_fix": "On the -1 paths, clear targ->tm, free the TM, and complete queued timedout commands with CAM_DEV_NOT_THERE; drain targ->commands in mprsas_remove_volume.",
  "fix_status": "not_testable",
  "fix_baseline_reproduced": 0,
  "fix_patched_reproduced": 0,
  "fix_verdict": "fix.diff authored from line-accurate analysis; not exercisable on this guest.",
  "fix_evidence": "findings/poc/DF-3802/fix.diff"
}