panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x798 pc=0x9ebc6b]

goroutine 1426403 [running]:
panic(0xef6ea0, 0x1a24b30)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc003dbd720 sp=0xc003dbd668 pc=0x43438d
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:695 +0x3da fp=0xc003dbd750 sp=0xc003dbd720 pc=0x44b8fa
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Kernel(...)
	pkg/sentry/kernel/task.go:641
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*socketOpsCommon).Release(0xc000019800, 0x1229da0, 0x1a26110)
	pkg/sentry/socket/netstack/netstack.go:507 +0x2eb fp=0xc003dbd820 sp=0xc003dbd750 pc=0x9ebc6b
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef.func1(0x1229da0, 0x1a26110)
	pkg/sentry/fs/file.go:152 +0xaa fp=0xc003dbd878 sp=0xc003dbd820 pc=0x6a5d8a
gvisor.dev/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc001061080, 0x1229da0, 0x1a26110, 0xc003dbd8e0)
	pkg/refs/refcounter.go:500 +0x17a fp=0xc003dbd8c0 sp=0xc003dbd878 pc=0x559f7a
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef(0xc001061080, 0x1229da0, 0x1a26110)
	pkg/sentry/fs/file.go:146 +0x73 fp=0xc003dbd910 sp=0xc003dbd8c0 pc=0x686713
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).drop(0xc001c23620, 0xc001061080)
	pkg/sentry/kernel/fd_table.go:148 +0x121 fp=0xc003dbd990 sp=0xc003dbd910 pc=0x892091
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).setAll(0xc001c23620, 0x3, 0xc001061340, 0x0, 0xc001148f01)
	pkg/sentry/kernel/fd_table_unsafe.go:155 +0x20a fp=0xc003dbda20 sp=0xc003dbd990 pc=0x894b8a
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).newFDAt(0xc001c23620, 0x1229fa0, 0xc002dea000, 0x3, 0xc001061340, 0x0, 0x43dd01, 0x0, 0x0)
	pkg/sentry/kernel/fd_table.go:442 +0x103 fp=0xc003dbda78 sp=0xc003dbda20 pc=0x893783
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).NewFDAt(...)
	pkg/sentry/kernel/fd_table.go:416
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).NewFDAt(...)
	pkg/sentry/kernel/task.go:841
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Dup3(0xc002dea000, 0x4, 0x3, 0x80000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:855 +0x128 fp=0xc003dbdb08 sp=0xc003dbda78 pc=0x91f8a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc002dea000, 0x124, 0x4, 0x3, 0x80000, 0x0, 0x0, 0x0, 0x0, 0x105aae0, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x122 fp=0xc003dbdc68 sp=0xc003dbdb08 pc=0x8cd162
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc002dea000, 0x124, 0x4, 0x3, 0x80000, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc003dbdcf0 sp=0xc003dbdc68 pc=0x8ce346
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc002dea000, 0x124, 0x4, 0x3, 0x80000, 0x0, 0x0, 0x0, 0x11fc201, 0x100000000000000)
	pkg/sentry/kernel/task_syscall.go:198 +0x96 fp=0xc003dbdd50 sp=0xc003dbdcf0 pc=0x8cded6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc002dea000, 0x2, 0xc002dea000)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc003dbde10 sp=0xc003dbdd50 pc=0x8cd86c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc002dea000, 0x11fc220, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0xc18 fp=0xc003dbdf60 sp=0xc003dbde10 pc=0x8c2228
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc002dea000, 0x6f9e)
	pkg/sentry/kernel/task_run.go:93 +0x18b fp=0xc003dbdfd0 sp=0xc003dbdf60 pc=0x8c0efb
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc003dbdfd8 sp=0xc003dbdfd0 pc=0x467d61
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0xfe