panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x9bb26a]

goroutine 373403 [running]:
panic({0x12b7620, 0x22a4fb0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc0035a6fb8 sp=0xc0035a6ef8 pc=0x436b9b
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:260
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x37d fp=0xc0035a7018 sp=0xc0035a6fb8 pc=0x44e1dd
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).IncRef(...)
	pkg/sentry/vfs/namespace.go:243
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetMountNamespace(0xc0085ce000)
	pkg/sentry/kernel/task.go:798 +0xaa fp=0xc0035a7058 sp=0xc0035a7018 pc=0x9bb26a
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*namespaceSymlink).getInode(0xc0035a70b8?, 0x9ce145?)
	pkg/sentry/fsimpl/proc/task_files.go:1287 +0xfc fp=0xc0035a7078 sp=0xc0035a7058 pc=0xc2847c
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*namespaceSymlink).Getlink(0xc003e7e600, {0x16f7020, 0xc0042d2000}, 0xc000662580)
	pkg/sentry/fsimpl/proc/task_files.go:1322 +0x22d fp=0xc0035a7138 sp=0xc0035a7078 pc=0xc288cd
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*taskOwnedInode).Getlink(0x12a7ce0?, {0x16f7020?, 0xc0042d2000?}, 0x3?)
	<autogenerated>:1 +0x34 fp=0xc0035a7168 sp=0xc0035a7138 pc=0xc52d74
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc00061a900?, {0x16f7020, 0xc0042d2000}, 0xc00061a900, 0xc007f8a1b0)
	pkg/sentry/fsimpl/kernfs/filesystem.go:85 +0x4ce fp=0xc0035a7218 sp=0xc0035a7168 pc=0x8048ae
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc0035a72f8?, {0x16f7020, 0xc0042d2000}, 0xc00061a900)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0xc5 fp=0xc0035a7258 sp=0xc0035a7218 pc=0x804f45
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0xc0006f8140, {0x16f7020, 0xc0042d2000}, 0xc00061a900, {0x8002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x632 fp=0xc0035a74c8 sp=0xc0035a7258 pc=0x808b72
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0xc00054a8e0?, {0x16f7020?, 0xc0042d2000?}, 0xc00061a900?, {0x2304130?, 0x0?, 0x0?})
	<autogenerated>:1 +0x2e fp=0xc0035a7500 sp=0xc0035a74c8 pc=0xc48cee
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0xc007178940?, {0x16f7020, 0xc0042d2000}, 0xc0006f0000?, 0xc0035a7820, 0xc0035a77b8)
	pkg/sentry/vfs/vfs.go:459 +0x31a fp=0xc0035a7720 sp=0xc0035a7500 pc=0x798a5a
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0xc0042d2000, 0x28f6af88?, 0x0?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x29a fp=0xc0035a78e0 sp=0xc0035a7720 pc=0xb4321a
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0xc0042d2000?, 0x0?, {{0xffffff9c}, {0x7f7fab6b8030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x5f fp=0xc0035a7918 sp=0xc0035a78e0 pc=0xb42ebf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0042d2000, 0x101, {{0xffffff9c}, {0x7f7fab6b8030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc0035a7c58 sp=0xc0035a7918 pc=0x9e45eb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0042d2000, 0x85?, {{0xffffff9c}, {0x7f7fab6b8030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc0035a7cb8 sp=0xc0035a7c58 pc=0x9e5bd4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x85380f?, 0x0?, {{0xffffff9c}, {0x7f7fab6b8030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc0035a7d18 sp=0xc0035a7cb8 pc=0x9e57c5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001f19790?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc0035a7e10 sp=0xc0035a7d18 pc=0x9e548c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc005b4bd00?, 0xc0042d2000)
	pkg/sentry/kernel/task_run.go:269 +0x144a fp=0xc0035a7f48 sp=0xc0035a7e10 pc=0x9d6f6a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0042d2000, 0x6315)
	pkg/sentry/kernel/task_run.go:98 +0x25c fp=0xc0035a7fc0 sp=0xc0035a7f48 pc=0x9d541c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x2a fp=0xc0035a7fe0 sp=0xc0035a7fc0 pc=0x9e2a6a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc0035a7fe8 sp=0xc0035a7fe0 pc=0x46d641
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0x105