panic: inp_leave_group: imf_sources not empty
cpuid = 1
time = 1560345621
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0020f12510
vpanic() at vpanic+0x1e0/frame 0xfffffe0020f12570
panic() at panic+0x43/frame 0xfffffe0020f125d0
inp_setmoptions() at inp_setmoptions+0x40bd/frame 0xfffffe0020f127b0
ip_ctloutput() at ip_ctloutput+0x7fd/frame 0xfffffe0020f12800
rip_ctloutput() at rip_ctloutput+0x2c9/frame 0xfffffe0020f12840
sosetopt() at sosetopt+0x101/frame 0xfffffe0020f128c0
kern_setsockopt() at kern_setsockopt+0x158/frame 0xfffffe0020f12940
sys_setsockopt() at sys_setsockopt+0x33/frame 0xfffffe0020f12970
ia32_syscall() at ia32_syscall+0x452/frame 0xfffffe0020f12ab0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x81430ba
KDB: enter: panic
[ thread pid 1122 tid 100434 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why