panic: Decrementing non-positive ref count 0xc000672400, owned by *mm.SpecialMappable

goroutine 80961 [running]:
panic(0x100bbc0, 0xc06a3ccc20)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc00133fcd8 sp=0xc00133fc20 pc=0x43438d
gvisor.dev/gvisor/pkg/sentry/mm.(*SpecialMappableRefs).DecRef(0xc000672400, 0xc00133fd50)
	bazel-out/k8-fastbuild/bin/pkg/sentry/mm/special_mappable_refs.go:127 +0x10a fp=0xc00133fd40 sp=0xc00133fcd8 pc=0x7dc3ca
gvisor.dev/gvisor/pkg/sentry/mm.(*SpecialMappable).DecRef(0xc000672400, 0x1401d20, 0x1e01440)
	pkg/sentry/mm/special_mappable.go:57 +0x5a fp=0xc00133fd70 sp=0xc00133fd40 pc=0x7db7ba
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).removeVMAsLocked(0xc017b8d000, 0x1401d20, 0x1e01440, 0x10000, 0x7fffffff0000, 0x1245158, 0xc0146d80c0)
	pkg/sentry/mm/vma.go:505 +0x3cd fp=0xc00133fdf8 sp=0xc00133fd70 pc=0x7e698d
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).unmapLocked(0xc017b8d000, 0x1401d20, 0x1e01440, 0x10000, 0x7fffffff0000, 0x44828e, 0xc0006941e4)
	pkg/sentry/mm/vma.go:465 +0x8f fp=0xc00133fe40 sp=0xc00133fdf8 pc=0x7e658f
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).DecUsers(0xc017b8d000, 0x1401d20, 0x1e01440)
	pkg/sentry/mm/lifecycle.go:352 +0x23a fp=0xc00133fed0 sp=0xc00133fe40 pc=0x7c47ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*TaskContext).release(0xc018029cb8)
	pkg/sentry/kernel/task_context.go:65 +0xa2 fp=0xc00133fef8 sp=0xc00133fed0 pc=0x956812
gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0x0, 0xc018029500, 0x13cfa80, 0x0)
	pkg/sentry/kernel/task_exit.go:306 +0x182 fp=0xc00133ff60 sp=0xc00133fef8 pc=0x959252
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc018029500, 0x380)
	pkg/sentry/kernel/task_run.go:97 +0x1bd fp=0xc00133ffd0 sp=0xc00133ff60 pc=0x96345d
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc00133ffd8 sp=0xc00133ffd0 pc=0x467da1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:371 +0x112