panic: Decrementing non-positive ref count 0xc00033fad0, owned by vfs.Filesystem

goroutine 323 [running]:
panic({0x10f2ce0?, 0xc0005ba600?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc001023a98 sp=0xc0010239e8 pc=0x43a72c
gvisor.dev/gvisor/pkg/sentry/vfs.(*FilesystemRefs).DecRef(0xc00033fad0, 0xc000a8c4a0?)
	bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/filesystem_refs.go:126 +0x154 fp=0xc001023b00 sp=0xc001023a98 pc=0x791474
gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef(0xc001023b80?, {0x1580618?, 0xc00062aa80?})
	pkg/sentry/vfs/filesystem.go:77 +0x55 fp=0xc001023b40 sp=0xc001023b00 pc=0x790a55
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc00024d6d8, {0x1580618, 0xc00062aa80})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc001023bf0 sp=0xc001023b40 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy.func1()
	pkg/sentry/vfs/mount.go:826 +0x28 fp=0xc001023c18 sp=0xc001023bf0 pc=0x79a8e8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy(0xc000950000, {0x1580618, 0xc00062aa80})
	pkg/sentry/vfs/mount.go:839 +0x282 fp=0xc001023cb8 sp=0xc001023c18 pc=0x79a842
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).DecRef(0xc000950000, {0x1580618, 0xc00062aa80})
	pkg/sentry/vfs/mount.go:820 +0xa5 fp=0xc001023ce0 sp=0xc001023cb8 pc=0x79a585
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc00024d6d8, {0x1580618, 0xc00062aa80})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc001023d90 sp=0xc001023ce0 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).Destroy(0xc000860ff0, {0x1580618, 0xc00062aa80})
	pkg/sentry/vfs/namespace.go:201 +0x99 fp=0xc001023dc8 sp=0xc001023d90 pc=0x7a1d99
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef.func1()
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x38 fp=0xc001023df0 sp=0xc001023dc8 pc=0x8486b8
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).DecRef(0x0?, 0xc001023e68)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/nsfs/inode_refs.go:132 +0x75 fp=0xc001023e58 sp=0xc001023df0 pc=0x8481d5
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef(0xc00062aa80?, {0x1580618?, 0xc00062aa80?})
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x5c fp=0xc001023e98 sp=0xc001023e58 pc=0x84863c
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).DecRef(...)
	pkg/sentry/vfs/namespace.go:216
gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0x0, 0xc00062aa80)
	pkg/sentry/kernel/task_exit.go:297 +0x56b fp=0xc001023f48 sp=0xc001023e98 pc=0xa074eb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00062aa80, 0x13)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc001023fc0 sp=0xc001023f48 pc=0xa13e62
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x25 fp=0xc001023fe0 sp=0xc001023fc0 pc=0xa20e85
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc001023fe8 sp=0xc001023fe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 338
	pkg/sentry/kernel/task_start.go:391 +0xf8