panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x798 pc=0x9f356b]

goroutine 2154211 [running]:
panic(0xf004e0, 0x1a45b30)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc00487d688 sp=0xc00487d5d0 pc=0x43438d
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:695 +0x3da fp=0xc00487d6b8 sp=0xc00487d688 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(0xc00052bf00, 0x12370c0, 0x1a47110)
	pkg/sentry/socket/netstack/netstack.go:510 +0x2eb fp=0xc00487d788 sp=0xc00487d6b8 pc=0x9f356b
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef.func1(0x12370c0, 0x1a47110)
	pkg/sentry/fs/file.go:152 +0xaa fp=0xc00487d7e0 sp=0xc00487d788 pc=0x6a606a
gvisor.dev/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc003dd7340, 0x12370c0, 0x1a47110, 0xc00487d848)
	pkg/refs/refcounter.go:500 +0x17a fp=0xc00487d828 sp=0xc00487d7e0 pc=0x559f7a
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef(0xc003dd7340, 0x12370c0, 0x1a47110)
	pkg/sentry/fs/file.go:146 +0x73 fp=0xc00487d878 sp=0xc00487d828 pc=0x6869f3
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).drop(0xc005331470, 0xc003dd7340)
	pkg/sentry/kernel/fd_table.go:148 +0x121 fp=0xc00487d8f8 sp=0xc00487d878 pc=0x892da1
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).setAll(0xc005331470, 0x4, 0xc003dd6e70, 0x0, 0xc007177400)
	pkg/sentry/kernel/fd_table_unsafe.go:155 +0x20a fp=0xc00487d988 sp=0xc00487d8f8 pc=0x89589a
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).newFDAt(0xc005331470, 0x1237340, 0xc0090ee000, 0xc000000004, 0xc003dd6e70, 0x0, 0x2b57ebcf3c00, 0x0, 0x0)
	pkg/sentry/kernel/fd_table.go:442 +0x103 fp=0xc00487d9e0 sp=0xc00487d988 pc=0x894493
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(0xc0090ee000, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:855 +0x128 fp=0xc00487da70 sp=0xc00487d9e0 pc=0x927458
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Dup2(0xc0090ee000, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:836 +0x1c9 fp=0xc00487db08 sp=0xc00487da70 pc=0x9272c9
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0090ee000, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1066720, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x122 fp=0xc00487dc68 sp=0xc00487db08 pc=0x8cde72
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0090ee000, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc00487dcf0 sp=0xc00487dc68 pc=0x8cf056
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0090ee000, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x1209101, 0x100000000000000)
	pkg/sentry/kernel/task_syscall.go:198 +0x96 fp=0xc00487dd50 sp=0xc00487dcf0 pc=0x8cebe6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0090ee000, 0x2, 0xc0090ee000)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc00487de10 sp=0xc00487dd50 pc=0x8ce57c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc0090ee000, 0x12091e0, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0xc18 fp=0xc00487df60 sp=0xc00487de10 pc=0x8c2f38
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0090ee000, 0xd87f)
	pkg/sentry/kernel/task_run.go:93 +0x18b fp=0xc00487dfd0 sp=0xc00487df60 pc=0x8c1c0b
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc00487dfd8 sp=0xc00487dfd0 pc=0x467d61
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0xfe