panic: sbready: sb 0xfffff80004d19b90 NULL fnrdy
cpuid = 1
time = 202
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0016b2c530
vpanic() at vpanic+0x1e0/frame 0xfffffe0016b2c590
panic() at panic+0x43/frame 0xfffffe0016b2c5f0
sbready() at sbready+0x1fb/frame 0xfffffe0016b2c640
uipc_ready() at uipc_ready+0x267/frame 0xfffffe0016b2c690
sendfile_iodone() at sendfile_iodone+0x342/frame 0xfffffe0016b2c6f0
vnode_pager_generic_getpages_done_async() at vnode_pager_generic_getpages_done_async+0x4a/frame 0xfffffe0016b2c720
bufdone() at bufdone+0xa1/frame 0xfffffe0016b2c7a0
g_io_deliver() at g_io_deliver+0x35b/frame 0xfffffe0016b2c800
g_io_deliver() at g_io_deliver+0x35b/frame 0xfffffe0016b2c860
g_io_deliver() at g_io_deliver+0x35b/frame 0xfffffe0016b2c8c0
g_disk_done() at g_disk_done+0x179/frame 0xfffffe0016b2c910
dadone() at dadone+0x655/frame 0xfffffe0016b2c9a0
xpt_done_process() at xpt_done_process+0x5b2/frame 0xfffffe0016b2ca00
xpt_done_td() at xpt_done_td+0x175/frame 0xfffffe0016b2ca60
fork_exit() at fork_exit+0xb0/frame 0xfffffe0016b2cab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0016b2cab0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 5 tid 100031 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why