=== DF-3238 fix validation ===
1. patch --dry-run < /tmp/fix3238.diff   -> Hunk #1 succeeded at 233
2. patch < /tmp/fix3238.diff             -> applied; grep reentry==NULL -> procfs_map.c:246
3. cd /usr/src && make nativekernel KERNCONF=X86_64_GENERIC -> BUILD_RC=0
   '>>> Kernel build for X86_64_GENERIC completed on Wed Sep  9 04:47:26 UTC 2026'
4. make installkernel KERNCONF=X86_64_GENERIC -> INSTALL_RC=0 (04:48:42)
5. reboot -> uname: DragonFly 6.5-DEVELOPMENT #1: Wed Sep  9 04:36:32 UTC 2026
6. exact PoC re-run 240s -> 596k+ iterations, no panic, guest up
baseline comparison: stock #0 kernel panicked on first PoC run (panic.txt)
=> fix_status: fixed