panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x1b82999]

goroutine 3749355 [running]:
panic({0x324740, 0x281f3c0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc0010ae788 sp=0xc0010ae6c8 pc=0x1318c3b
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:260
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x37d fp=0xc0010ae7e8 sp=0xc0010ae788 pc=0x1331b1d
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).IncRef(...)
	pkg/sentry/vfs/namespace.go:243
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetMountNamespace(0xc0110f7500)
	pkg/sentry/kernel/task.go:798 +0xd9 fp=0xc0010ae880 sp=0xc0010ae7e8 pc=0x1b82999
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*namespaceSymlink).getInode(0xc0c0d8a800, 0xc0001c8310?)
	pkg/sentry/fsimpl/proc/task_files.go:1287 +0x110 fp=0xc0010ae8d8 sp=0xc0010ae880 pc=0x1ed8b50
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*namespaceSymlink).Getlink(0xc0c0d8a800, {0x84cca0, 0xc023f5aa80}, 0xc01e8f8f80)
	pkg/sentry/fsimpl/proc/task_files.go:1322 +0x145 fp=0xc0010ae9f8 sp=0xc0010ae8d8 pc=0x1ed8f45
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*taskOwnedInode).Getlink(0xc0265ce4e0, {0x84cca0, 0xc023f5aa80}, 0xc0861435f0?)
	<autogenerated>:1 +0x77 fp=0xc0010aea58 sp=0xc0010ae9f8 pc=0x1f14037
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0x132a879?, {0x84cca0, 0xc023f5aa80}, 0xc002a96000, 0xc086143560)
	pkg/sentry/fsimpl/kernfs/filesystem.go:85 +0x5a3 fp=0xc0010aeb98 sp=0xc0010aea58 pc=0x191b943
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc00037c730?, {0x84cca0, 0xc023f5aa80}, 0xc002a96000)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0xdf fp=0xc0010aec00 sp=0xc0010aeb98 pc=0x191c09f
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0xc00037c6e0, {0x84cca0, 0xc023f5aa80}, 0xc002a96000, {0x8002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x1c5 fp=0xc0010aeef0 sp=0xc0010aec00 pc=0x1920065
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0xc00037c6e0, {0x84cca0, 0xc023f5aa80}, 0xc002a96000?, {0x38143c0?, 0x0?, 0x0?})
	<autogenerated>:1 +0x85 fp=0xc0010aef50 sp=0xc0010aeef0 pc=0x1f04125
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0xc0076cbfc0?, {0x84cca0, 0xc023f5aa80}, 0xc000160400?, 0xc0010af370, 0xc0010af268)
	pkg/sentry/vfs/vfs.go:459 +0x517 fp=0xc0010af1c0 sp=0xc0010aef50 pc=0x187f9d7
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0xc023f5aa80, 0x1?, 0x1354f65?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x2b2 fp=0xc0010af420 sp=0xc0010af1c0 pc=0x1dabe72
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0xc023f5aa80?, 0x6426b75401?, {{0xffffff9c}, {0x7fa6319bd030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x45 fp=0xc0010af480 sp=0xc0010af420 pc=0x1dabac5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc023f5aa80, 0x101, {{0xffffff9c}, {0x7fa6319bd030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9c2 fp=0xc0010af960 sp=0xc0010af480 pc=0x1bbee02
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc023f5aa80, 0x0?, {{0xffffff9c}, {0x7fa6319bd030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc0010af9f8 sp=0xc0010af960 pc=0x1bc0bfd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc02bbd56c0?, 0xc0601b8e10?, {{0xffffff9c}, {0x7fa6319bd030}, {0x2}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc0010afa70 sp=0xc0010af9f8 pc=0x1bc05af
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc023f5aa80)
	pkg/sentry/kernel/task_syscall.go:257 +0x4c5 fp=0xc0010afb98 sp=0xc0010afa70 pc=0x1bc0145
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc023f5aa80?, 0xc023f5aa80)
	pkg/sentry/kernel/task_run.go:269 +0x1d4b fp=0xc0010afe70 sp=0xc0010afb98 pc=0x1baa7ab
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc023f5aa80, 0x6db9)
	pkg/sentry/kernel/task_run.go:98 +0x41b fp=0xc0010affb0 sp=0xc0010afe70 pc=0x1ba803b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x48 fp=0xc0010affe0 sp=0xc0010affb0 pc=0x1bbc908
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc0010affe8 sp=0xc0010affe0 pc=0x1351bc1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0x1ad