panic: ffs2_balloc: unwind failed
Starting stack trace...
panic(ffffffff830be0c4) at panic+0x1ba sys/kern/subr_prf.c:229
ffs2_balloc(fffffd80717afa50,40000000006,1,fffffd807f7d7750,1,ffff80002a54ed60) at ffs2_balloc+0x198d sys/ufs/ffs/ffs_balloc.c:788
ffs_truncate(fffffd80717afa50,40000000007,0,fffffd807f7d7750) at ffs_truncate+0x42f sys/ufs/ffs/ffs_inode.c:185
ufs_setattr(ffff80002a54ee90) at ufs_setattr+0x909 sys/ufs/ufs/ufs_vnops.c:403
VOP_SETATTR(fffffd8069dbf8a8,ffff80002a54ef18,fffffd807f7d7750,ffff80002a4c3458) at VOP_SETATTR+0x113 sys/kern/vfs_vops.c:210
dotruncate(ffff80002a4c3458,fffffd8069dbf8a8,40000000007) at dotruncate+0x1d6 sys/kern/vfs_syscalls.c:2850
sys_ftruncate(ffff80002a4c3458,ffff80002a54f140,ffff80002a54f090) at sys_ftruncate+0x1db sys/kern/vfs_syscalls.c:2902
syscall(ffff80002a54f140) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbcf12d2a080, count: 248
End of stack trace.