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

virtualization:
  QEMU/KVM (vm.sh: -enable-kvm -m 4096 -smp 6), host CPU vendor: GenuineIntel
  -> guest wrmsr executes natively; Intel raises #GP(0) on WRMSR
     FSBASE/GSBASE with non-canonical value (SDM Vol.3 17.17)

kernel under test (baseline):
  stock snapshot kernel (clean sys/ tree), /boot/kernel/kernel
  panic RIP 0xffffffff80bd4c48 == set_user_TLS+0x68 == first wrmsr
  (mov $0xc0000100,%ecx; wrmsr) per objdump -d

test user: nobody (uid 65534) via `su -m nobody -c ...` from root ssh
syscalls: SYS_set_tls_area=472, SYS_get_tls_area=473 (sys/sys/syscall.h)