panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x798 pc=0x9f307b]

goroutine 512107 [running]:
panic(0xefdde0, 0x1a3eb30)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc0014cf720 sp=0xc0014cf668 pc=0x43438d
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:695 +0x3da fp=0xc0014cf750 sp=0xc0014cf720 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(0xc0003fa800, 0x1233ee0, 0x1a40110)
	pkg/sentry/socket/netstack/netstack.go:510 +0x2eb fp=0xc0014cf820 sp=0xc0014cf750 pc=0x9f307b
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef.func1(0x1233ee0, 0x1a40110)
	pkg/sentry/fs/file.go:152 +0xaa fp=0xc0014cf878 sp=0xc0014cf820 pc=0x6a604a
gvisor.dev/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc002428840, 0x1233ee0, 0x1a40110, 0xc0014cf8e0)
	pkg/refs/refcounter.go:500 +0x17a fp=0xc0014cf8c0 sp=0xc0014cf878 pc=0x559f7a
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef(0xc002428840, 0x1233ee0, 0x1a40110)
	pkg/sentry/fs/file.go:146 +0x73 fp=0xc0014cf910 sp=0xc0014cf8c0 pc=0x6869d3
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).drop(0xc001c17740, 0xc002428840)
	pkg/sentry/kernel/fd_table.go:148 +0x121 fp=0xc0014cf990 sp=0xc0014cf910 pc=0x892881
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).setAll(0xc001c17740, 0x0, 0xc001f989a0, 0x0, 0xc001f08400)
	pkg/sentry/kernel/fd_table_unsafe.go:155 +0x20a fp=0xc0014cfa20 sp=0xc0014cf990 pc=0x89537a
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).newFDAt(0xc001c17740, 0x1234160, 0xc0023d8000, 0x0, 0xc001f989a0, 0x0, 0x43dd00, 0x0, 0x0)
	pkg/sentry/kernel/fd_table.go:442 +0x103 fp=0xc0014cfa78 sp=0xc0014cfa20 pc=0x893f73
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(0xc0023d8000, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:855 +0x128 fp=0xc0014cfb08 sp=0xc0014cfa78 pc=0x926f38
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0023d8000, 0x124, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1063720, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x122 fp=0xc0014cfc68 sp=0xc0014cfb08 pc=0x8cd952
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0023d8000, 0x124, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc0014cfcf0 sp=0xc0014cfc68 pc=0x8ceb36
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0023d8000, 0x124, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1206001, 0x100000000000000)
	pkg/sentry/kernel/task_syscall.go:198 +0x96 fp=0xc0014cfd50 sp=0xc0014cfcf0 pc=0x8ce6c6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0023d8000, 0x2, 0xc0023d8000)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc0014cfe10 sp=0xc0014cfd50 pc=0x8ce05c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc0023d8000, 0x1206080, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0xc18 fp=0xc0014cff60 sp=0xc0014cfe10 pc=0x8c2a18
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0023d8000, 0x58cc)
	pkg/sentry/kernel/task_run.go:93 +0x18b fp=0xc0014cffd0 sp=0xc0014cff60 pc=0x8c16eb
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc0014cffd8 sp=0xc0014cffd0 pc=0x467d61
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0xfe