panic: brelse: non-VMIO buffer marked NOREUSE
cpuid = 0
time = 12
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056b55950
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056b55ab0
vpanic() at vpanic+0x257/frame 0xfffffe0056b55c70
panic() at panic+0xb5/frame 0xfffffe0056b55d40
brelse() at brelse+0x1040/frame 0xfffffe0056b55de0
bufwrite() at bufwrite+0x49e/frame 0xfffffe0056b55e30
ffs_write() at ffs_write+0xa5f/frame 0xfffffe0056b55ff0
VOP_WRITE_APV() at VOP_WRITE_APV+0x28b/frame 0xfffffe0056b56210
vnode_pager_generic_putpages() at vnode_pager_generic_putpages+0x155b/frame 0xfffffe0056b56440
VOP_PUTPAGES_APV() at VOP_PUTPAGES_APV+0x87/frame 0xfffffe0056b56470
vnode_pager_putpages() at vnode_pager_putpages+0x189/frame 0xfffffe0056b56570
vm_pageout_flush() at vm_pageout_flush+0x20b/frame 0xfffffe0056b566b0
vm_pageout_cluster() at vm_pageout_cluster+0x532/frame 0xfffffe0056b569f0
vm_pageout_laundry_worker() at vm_pageout_laundry_worker+0x100e/frame 0xfffffe0056b56ef0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0056b56f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056b56f30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 8 tid 100080 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x25b6f77(%rip)
db> 
db>