panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xd588bc]

goroutine 104446 [running]:
panic(0x15530e0, 0x21ff360)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc0015130d8 sp=0xc001513020 pc=0x43611d
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:695 +0x3da fp=0xc001513108 sp=0xc0015130d8 pc=0x44ec4a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Kernel(...)
	pkg/sentry/kernel/task.go:641
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*socketOpsCommon).Release(0xc000952800, 0x18fd260, 0x2200940)
	pkg/sentry/socket/netstack/netstack.go:507 +0x42c fp=0xc001513248 sp=0xc001513108 pc=0xd588bc
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).Release(0xc000952800, 0x18fd260, 0x2200940)
	<autogenerated>:1 +0x58 fp=0xc001513270 sp=0xc001513248 pc=0xd86828
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef.func1(0x18fd260, 0x2200940)
	pkg/sentry/fs/file.go:152 +0x10d fp=0xc0015132e0 sp=0xc001513270 pc=0x83fd3d
gvisor.dev/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc000b314a0, 0x18fd260, 0x2200940, 0xc001513350)
	pkg/refs/refcounter.go:500 +0x186 fp=0xc001513330 sp=0xc0015132e0 pc=0x60ac46
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef(0xc000b314a0, 0x18fd260, 0x2200940)
	pkg/sentry/fs/file.go:146 +0x85 fp=0xc001513380 sp=0xc001513330 pc=0x812735
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).drop(0xc000a4cb40, 0xc000b314a0)
	pkg/sentry/kernel/fd_table.go:148 +0x1d7 fp=0xc001513418 sp=0xc001513380 pc=0xb52197
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).setAll(0xc000a4cb40, 0x0, 0xc000f316b0, 0x0, 0xc00056e400)
	pkg/sentry/kernel/fd_table_unsafe.go:155 +0x369 fp=0xc0015134c8 sp=0xc001513418 pc=0xb55a49
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).newFDAt(0xc000a4cb40, 0x18fd460, 0xc00104c000, 0x0, 0xc000f316b0, 0x0, 0x991800, 0x0, 0x0)
	pkg/sentry/kernel/fd_table.go:442 +0x146 fp=0xc001513558 sp=0xc0015134c8 pc=0xb53f76
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(0xc00104c000, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:855 +0x1a5 fp=0xc001513638 sp=0xc001513558 pc=0xc2e5d5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Dup2(0xc00104c000, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:836 +0x24b fp=0xc001513740 sp=0xc001513638 pc=0xc2e3cb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00104c000, 0x21, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x340, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x44e fp=0xc0015139e0 sp=0xc001513740 pc=0xbb554e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00104c000, 0x21, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x407baa, 0xc00104c8d7)
	pkg/sentry/kernel/task_syscall.go:238 +0xb5 fp=0xc001513ac0 sp=0xc0015139e0 pc=0xbb6c05
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00104c000, 0x21, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1152f02, 0x2bedc32)
	pkg/sentry/kernel/task_syscall.go:198 +0x10a fp=0xc001513b70 sp=0xc001513ac0 pc=0xbb656a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00104c000, 0x2, 0xc00104c000)
	pkg/sentry/kernel/task_syscall.go:173 +0x1e8 fp=0xc001513cb0 sp=0xc001513b70 pc=0xbb5d58
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00104c000, 0x18cf140, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0x11d9 fp=0xc001513ee8 sp=0xc001513cb0 pc=0xba26a9
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00104c000, 0x138c)
	pkg/sentry/kernel/task_run.go:93 +0x31d fp=0xc001513fd0 sp=0xc001513ee8 pc=0xba087d
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc001513fd8 sp=0xc001513fd0 pc=0x46b961
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0x19e