panic: Incrementing non-positive ref count 0xc0245423c0 owned by *mm.SpecialMappable

goroutine 660117 [running]:
panic(0x100bba0, 0xc051c94ac0)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc05149b448 sp=0xc05149b390 pc=0x43438d
gvisor.dev/gvisor/pkg/sentry/mm.(*SpecialMappableRefs).IncRef(0xc0245423c0)
	bazel-out/k8-fastbuild/bin/pkg/sentry/mm/special_mappable_refs.go:83 +0xe0 fp=0xc05149b4b0 sp=0xc05149b448 pc=0x7dc240
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).Fork(0xc00197f000, 0x1402180, 0xc068f53500, 0x0, 0x0, 0x0)
	pkg/sentry/mm/lifecycle.go:133 +0x6e5 fp=0xc05149b800 sp=0xc05149b4b0 pc=0x7c3605
gvisor.dev/gvisor/pkg/sentry/kernel.(*TaskContext).Fork(0xc068f53cb8, 0x1402180, 0xc068f53500, 0xc000510000, 0xc0a8a5cc00, 0xc05149b8f8, 0x7f8998, 0x7f5ba04f29f0)
	pkg/sentry/kernel/task_context.go:101 +0x1ca fp=0xc05149b868 sp=0xc05149b800 pc=0x9569aa
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc068f53500, 0xc05149bae0, 0xc000000000, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_clone.go:252 +0x342 fp=0xc05149bab0 sp=0xc05149b868 pc=0x953e52
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0xc068f53500, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0xc05149bbc8, 0x47bc71, 0xd872, 0xc05149bbc4)
	pkg/sentry/syscalls/linux/sys_thread.go:270 +0x165 fp=0xc05149bb48 sp=0xc05149bab0 pc=0xa06b95
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc068f53500, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x1, 0xc05149bc14, 0xdcea38, 0x65, ...)
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:37 +0xa3 fp=0xc05149bba8 sp=0xc05149bb48 pc=0x9cf733
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc068f53500, 0x38, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x1, 0x0, 0x11f18c0, ...)
	pkg/sentry/kernel/task_syscall.go:117 +0x1b6 fp=0xc05149bc68 sp=0xc05149bba8 pc=0x971296
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc068f53500, 0x38, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x1, 0x169c940, 0x1)
	pkg/sentry/kernel/task_syscall.go:292 +0x70 fp=0xc05149bcf0 sp=0xc05149bc68 pc=0x972580
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc068f53500, 0x38, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x1, 0x13cfc01, 0x100000000000000)
	pkg/sentry/kernel/task_syscall.go:239 +0xb4 fp=0xc05149bd50 sp=0xc05149bcf0 pc=0x972034
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc068f53500, 0x2, 0xc068f53500)
	pkg/sentry/kernel/task_syscall.go:206 +0x198 fp=0xc05149be10 sp=0xc05149bd50 pc=0x971918
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc068f53500, 0x13cfca0, 0x0)
	pkg/sentry/kernel/task_run.go:321 +0xd88 fp=0xc05149bf60 sp=0xc05149be10 pc=0x9648a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc068f53500, 0x3546)
	pkg/sentry/kernel/task_run.go:97 +0x1bd fp=0xc05149bfd0 sp=0xc05149bf60 pc=0x9633ed
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc05149bfd8 sp=0xc05149bfd0 pc=0x467da1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:371 +0x112