=== FIX-V2 KERNEL: DragonFly 6.5-DEVELOPMENT #1: Wed Sep 16 19:37:17 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  ===

--- variant B: mmap_ofs (baseline: panic: sndbuf_getbufofs: ofs invalid 268435456) ---
[*] dsp_mmap_single bounds check (dsp.c:2342) vs u32 truncation (buffer.c:424), bufsize=65536
    sane   off=0x20000 size=0x1000 -> sum=0x21000 : REJECTED (check works)
    attack off=0xffffffff10000000 size=0xf0000000
           -> wrapped sum=0x0 <= bufsize: PASS ; truncated ofs=0x10000000 (wanted 0x10000000) : CHECK BYPASSED, wild ofs controlled
[*] mmap: Invalid argument (errno=22)
exit=0
guest: up