panic: sx lock still held
cpuid = 1
time = 1569453038
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00246df750
vpanic() at vpanic+0x1e0/frame 0xfffffe00246df7b0
panic() at panic+0x43/frame 0xfffffe00246df810
sx_destroy() at sx_destroy+0x5e/frame 0xfffffe00246df830
solisten_proto() at solisten_proto+0xd2/frame 0xfffffe00246df890
tcp6_usr_listen() at tcp6_usr_listen+0x1cc/frame 0xfffffe00246df8f0
solisten() at solisten+0x7a/frame 0xfffffe00246df930
kern_listen() at kern_listen+0x125/frame 0xfffffe00246df970
ia32_syscall() at ia32_syscall+0x46a/frame 0xfffffe00246dfab0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x8142e3e
KDB: enter: panic
[ thread pid 1606 tid 101112 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why