{
 "finding_id": "DF-2900",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "arbitrary_write",
 "confidence": "speculative",
 "verdict": "The unchecked failure return is real: kmem_alloc_pageable returns 0 on vm_map_find failure (vm_kern.c:176-178 confirmed) and procfs_rwmem stores kva at procfs_mem.c:101 with no check, then pmap_kenter_quick(kva, pa) at :147 and kmem_free(kernel_map, 0, PAGE_SIZE) at :161. The claimed trigger (kernel_map KVA exhaustion on x86_64) is not honestly constructible: kernel_map VA space is effectively unbounded relative to any unpriv-reachable allocation rate, and vm_map entry allocation blocks rather than fails under pressure. Unpriv reachability of the surrounding path (pread/pwrite /proc/own-pid/mem) is trivial and untested-here only because the trigger condition cannot be reached. The page-table-pivot consequence analysis (vtopte(0) aliasing the PML4 self-map on pc64) is consistent with the code but remains untriggered. Fix (kva==0 -> ENOMEM) compiled.",
 "exploit_chain": "",
 "evidence": "vm_kern.c:176-178 returns 0; procfs_mem.c:101/:147/:161 use it unchecked",
 "kernel_refs": [
  "sys/vfs/procfs/procfs_mem.c:101",
  "sys/vfs/procfs/procfs_mem.c:147",
  "sys/vm/vm_kern.c:176"
 ],
 "poc_changes": "trigger infeasible; static confirmation",
 "attempts": 0,
 "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:04 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64",
 "runtime_sec": 0,
 "guest_dirty": 0,
 "build_cmd": "(none)",
 "run_cmd": "(none)",
 "code_hash": "",
 "notes": "speculative trigger; consequence would be page-table pivot (arbitrary phys R/W) per finding analysis",
 "recommended_fix": "if (kva == 0) { vmspace_drop(vm); return ENOMEM; }",
 "fix_status": "not_testable",
 "fix_verdict": "compile-validated in fix-all kernel"
}