panic: sx lock still held
cpuid = 1
time = 1570790962
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002437f740
vpanic() at vpanic+0x1c7/frame 0xfffffe002437f7b0
panic() at panic+0x43/frame 0xfffffe002437f810
sx_destroy() at sx_destroy+0x63/frame 0xfffffe002437f830
solisten_proto() at solisten_proto+0xd2/frame 0xfffffe002437f890
tcp6_usr_listen() at tcp6_usr_listen+0x1cc/frame 0xfffffe002437f8f0
solisten() at solisten+0x7a/frame 0xfffffe002437f930
kern_listen() at kern_listen+0x125/frame 0xfffffe002437f970
ia32_syscall() at ia32_syscall+0x466/frame 0xfffffe002437fab0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x8142e3e
KDB: enter: panic
[ thread pid 4093 tid 100333 ]
Stopped at      kdb_enter+0x67: movq    $0,0x1477816(%rip)