and crash output :
sudo crash -M netbsd.2.core -N /netbsd
Password:
Crash version 8.0, image version 8.0.
System panicked: ffs_newvnode: dup alloc ino=24113408 on /: mode 81a4/81a4 gen 3718e969/3718e969 size 260 blocks 8
Backtrace from time of crash is available.
crash> bt
_KERNEL_OPT_NVGA_RASTERCONSOLE() at 0
?() at fffffe812dd449c0
vpanic() at vpanic+0x166
snprintf() at snprintf
ffs_newvnode() at ffs_newvnode+0x530
vcache_new() at vcache_new+0x95
ufs_makeinode() at ufs_makeinode+0x38
ufs_create() at ufs_create+0x31
VOP_CREATE() at VOP_CREATE+0x51
vn_open() at vn_open+0x323
do_open() at do_open+0x112
do_sys_openat() at do_sys_openat+0x68
sys_open() at sys_open+0x24
syscall() at syscall+0x1ec
--- syscall (number 5) ---
7d48dd63e2ca: