panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xd68c2c]

goroutine 703688 [running]:
panic(0x15627e0, 0x2223360)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc0005771e0 sp=0xc000577128 pc=0x43611d
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:695 +0x3da fp=0xc000577210 sp=0xc0005771e0 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(0xc093892400, 0x190fbc0, 0x2224940)
	pkg/sentry/socket/netstack/netstack.go:510 +0x42c fp=0xc000577350 sp=0xc000577210 pc=0xd68c2c
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).Release(0xc093892400, 0x190fbc0, 0x2224940)
	<autogenerated>:1 +0x58 fp=0xc000577378 sp=0xc000577350 pc=0xd96898
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef.func1(0x190fbc0, 0x2224940)
	pkg/sentry/fs/file.go:152 +0x10d fp=0xc0005773e8 sp=0xc000577378 pc=0x8400dd
gvisor.dev/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc086607340, 0x190fbc0, 0x2224940, 0xc000577458)
	pkg/refs/refcounter.go:500 +0x186 fp=0xc000577438 sp=0xc0005773e8 pc=0x60ac46
gvisor.dev/gvisor/pkg/sentry/fs.(*File).DecRef(0xc086607340, 0x190fbc0, 0x2224940)
	pkg/sentry/fs/file.go:146 +0x85 fp=0xc000577488 sp=0xc000577438 pc=0x812ad5
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).drop(0xc084043620, 0xc086607340)
	pkg/sentry/kernel/fd_table.go:148 +0x1d7 fp=0xc000577520 sp=0xc000577488 pc=0xb52bf7
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).setAll(0xc084043620, 0x0, 0xc000fb7ad0, 0x0, 0xc001a98300)
	pkg/sentry/kernel/fd_table_unsafe.go:155 +0x369 fp=0xc0005775d0 sp=0xc000577520 pc=0xb564a9
gvisor.dev/gvisor/pkg/sentry/kernel.(*FDTable).newFDAt(0xc084043620, 0x190fe40, 0xc000f73500, 0x0, 0xc000fb7ad0, 0x0, 0xc0003ac100, 0x0, 0x0)
	pkg/sentry/kernel/fd_table.go:442 +0x146 fp=0xc000577660 sp=0xc0005775d0 pc=0xb549d6
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(0xc000f73500, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:855 +0x1a5 fp=0xc000577740 sp=0xc000577660 pc=0xc3e875
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000f73500, 0x124, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x340, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x44e fp=0xc0005779e0 sp=0xc000577740 pc=0xbb5fae
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000f73500, 0x124, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x407baa, 0xc000f73dd7)
	pkg/sentry/kernel/task_syscall.go:238 +0xb5 fp=0xc000577ac0 sp=0xc0005779e0 pc=0xbb7665
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000f73500, 0x124, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x11627c2, 0x2c11c32)
	pkg/sentry/kernel/task_syscall.go:198 +0x10a fp=0xc000577b70 sp=0xc000577ac0 pc=0xbb6fca
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000f73500, 0x2, 0xc000f73500)
	pkg/sentry/kernel/task_syscall.go:173 +0x1e8 fp=0xc000577cb0 sp=0xc000577b70 pc=0xbb67b8
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000f73500, 0x18e17c0, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0x11d9 fp=0xc000577ee8 sp=0xc000577cb0 pc=0xba3109
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000f73500, 0x8931)
	pkg/sentry/kernel/task_run.go:93 +0x31d fp=0xc000577fd0 sp=0xc000577ee8 pc=0xba12dd
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc000577fd8 sp=0xc000577fd0 pc=0x46b961
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0x19e