panic: inp_leave_group: imf_sources not empty
cpuid = 1
time = 1560708994
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001f767510
vpanic() at vpanic+0x1e0/frame 0xfffffe001f767570
panic() at panic+0x43/frame 0xfffffe001f7675d0
inp_setmoptions() at inp_setmoptions+0x40bd/frame 0xfffffe001f7677b0
ip_ctloutput() at ip_ctloutput+0x7fd/frame 0xfffffe001f767800
rip_ctloutput() at rip_ctloutput+0x2c9/frame 0xfffffe001f767840
sosetopt() at sosetopt+0x101/frame 0xfffffe001f7678c0
kern_setsockopt() at kern_setsockopt+0x158/frame 0xfffffe001f767940
sys_setsockopt() at sys_setsockopt+0x33/frame 0xfffffe001f767970
ia32_syscall() at ia32_syscall+0x452/frame 0xfffffe001f767ab0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x81430ec
KDB: enter: panic
[ thread pid 10176 tid 100631 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why