=== DF-0070 build.log (final successful build on guest) ===
Guest: DragonFly dfbsd 6.5-DEVELOPMENT v6.5.0.1712.g89e6a-DEVELOPMENT (build 2026-06-29) X86_64_GENERIC
Compiler: cc 8.3 [DragonFly] Release/2019-02-22

Command:
    cd /tmp/df70 && (cc -o df0070 df0070.c && cc -o probe probe.c && ./probe) > build.log 2>&1

$ cc -o df0070 df0070.c
$ cc -o probe probe.c
$ ./probe
sizeof(int)        = 4
sizeof(size_t)     = 8
sizeof(pid_t)      = 4
sizeof(gregset_t)  = 200  (struct reg)
sizeof(fpregset_t) = 512  (struct fpreg)
sizeof(prstatus_t) = 248
sizeof(prfpregset_t) = 512
sizeof(prpsinfo_t) = 120
MAXCOMLEN          = 16
PRARGSZ            = 80
PRSTATUS_VERSION   = 1
PRPSINFO_VERSION   = 1
sizeof(Elf_Note)  = 12
sizeof(Elf64_Ehdr) = 64
sizeof(Elf64_Phdr) = 56

BUILD_EXIT=0

Derived constants for the PoC:
  notesz        = sizeof(prpsinfo_t) + sizeof(prstatus_t) + sizeof(prfpregset_t)
                = 120 + 248 + 512 = 880
  nthreads      = (notesz - 120) / (248 + 512) = 760/760 = 1   (in [1,256])
  panic n_namesz= 0x10000000
  leak  n_namesz= notesz - sizeof(Elf_Note) - 8 = 860
  n_descsz      = 120  (= sizeof(prpsinfo_t), passes the :340 check)