=== uname ===
DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #1: Sun Jul 12 04:58:49 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
=== cc --version ===
cc 8.3 [DragonFly] Release/2019-02-22
Copyright (C) 2018 Free Software Foundation, Inc.
=== sysctl vfs.usermount ===
vfs.usermount: 0
=== patched kern.version ===
DragonFly 6.5-DEVELOPMENT #1: Sun Jul 12 04:58:49 UTC 2026
=== panic signature (from baseline run) ===
vn0: MBR magic not found; assume a COMPATIBILITY_SLICE (s0)
panic: ffs_isblock
cpuid = 5
Trace beginning at frame 0xfffff80117ba4268
ffs_isblock() at ffs_isblock+0x94 0xffffffff80910084 
ffs_isblock() at ffs_isblock+0x94 0xffffffff80910084 
ffs_alloccgblk.isra.1() at ffs_alloccgblk.isra.1+0x1be 0xffffffff809035be 
ffs_alloccg() at ffs_alloccg+0x2af 0xffffffff80903f0f 
ffs_hashalloc() at ffs_hashalloc+0x3c 0xffffffff8090231c 
ffs_alloc() at ffs_alloc+0x6f 0xffffffff8090406f 
Debugger("panic")

CPU5 stopping CPUs: 0x0000001f
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>