panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xd6941c]

goroutine 500759 [running]:
panic(0x156ad20, 0x2230360)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc001f3b0d8 sp=0xc001f3b020 pc=0x43611d
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:695 +0x3da fp=0xc001f3b108 sp=0xc001f3b0d8 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(0xc00192e300, 0x1919000, 0x2231940)
	pkg/sentry/socket/netstack/netstack.go:510 +0x42c fp=0xc001f3b248 sp=0xc001f3b108 pc=0xd6941c
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).Release(0xc00192e300, 0x1919000, 0x2231940)
	<autogenerated>:1 +0x58 fp=0xc001f3b270 sp=0xc001f3b248 pc=0xd97158
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef.func1(0x1919000, 0x2231940)
	pkg/sentry/fs/file.go:152 +0x10d fp=0xc001f3b2e0 sp=0xc001f3b270 pc=0x8400fd
gvisor.dev/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc00174c0b0, 0x1919000, 0x2231940, 0xc001f3b350)
	pkg/refs/refcounter.go:500 +0x186 fp=0xc001f3b330 sp=0xc001f3b2e0 pc=0x60ac46
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef(0xc00174c0b0, 0x1919000, 0x2231940)
	pkg/sentry/fs/file.go:146 +0x85 fp=0xc001f3b380 sp=0xc001f3b330 pc=0x812af5
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).drop(0xc002828a20, 0xc00174c0b0)
	pkg/sentry/kernel/fd_table.go:148 +0x1d7 fp=0xc001f3b418 sp=0xc001f3b380 pc=0xb53437
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).setAll(0xc002828a20, 0x4, 0xc002845290, 0x0, 0xc001f24700)
	pkg/sentry/kernel/fd_table_unsafe.go:155 +0x369 fp=0xc001f3b4c8 sp=0xc001f3b418 pc=0xb56ce9
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).newFDAt(0xc002828a20, 0x1919280, 0xc000e5d500, 0x4, 0xc002845290, 0x0, 0x991c00, 0x0, 0x0)
	pkg/sentry/kernel/fd_table.go:442 +0x146 fp=0xc001f3b558 sp=0xc001f3b4c8 pc=0xb55216
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(0xc000e5d500, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:855 +0x1a5 fp=0xc001f3b638 sp=0xc001f3b558 pc=0xc3f0b5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Dup2(0xc000e5d500, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:836 +0x24b fp=0xc001f3b740 sp=0xc001f3b638 pc=0xc3eeab
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000e5d500, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x340, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x44e fp=0xc001f3b9e0 sp=0xc001f3b740 pc=0xbb67ee
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000e5d500, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x407baa, 0xc000e5ddd7)
	pkg/sentry/kernel/task_syscall.go:238 +0xb5 fp=0xc001f3bac0 sp=0xc001f3b9e0 pc=0xbb7ea5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000e5d500, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x11698a2, 0x2c1ec32)
	pkg/sentry/kernel/task_syscall.go:198 +0x10a fp=0xc001f3bb70 sp=0xc001f3bac0 pc=0xbb780a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000e5d500, 0x2, 0xc000e5d500)
	pkg/sentry/kernel/task_syscall.go:173 +0x1e8 fp=0xc001f3bcb0 sp=0xc001f3bb70 pc=0xbb6ff8
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000e5d500, 0x18eab60, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0x11d9 fp=0xc001f3bee8 sp=0xc001f3bcb0 pc=0xba3949
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000e5d500, 0x5bad)
	pkg/sentry/kernel/task_run.go:93 +0x31d fp=0xc001f3bfd0 sp=0xc001f3bee8 pc=0xba1b1d
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc001f3bfd8 sp=0xc001f3bfd0 pc=0x46b961
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0x19e