panic: Decrementing non-positive ref count 0xc0005d7d40, owned by vfs.Filesystem

goroutine 609814 [running]:
panic({0x10f2ce0?, 0xc00999e8c0?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc000ab3a98 sp=0xc000ab39e8 pc=0x43a72c
gvisor.dev/gvisor/pkg/sentry/vfs.(*FilesystemRefs).DecRef(0xc0005d7d40, 0xc003d02b20?)
	bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/filesystem_refs.go:126 +0x154 fp=0xc000ab3b00 sp=0xc000ab3a98 pc=0x791474
gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef(0xc000ab3b80?, {0x1580618?, 0xc00355a000?})
	pkg/sentry/vfs/filesystem.go:77 +0x55 fp=0xc000ab3b40 sp=0xc000ab3b00 pc=0x790a55
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc000028c58, {0x1580618, 0xc00355a000})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc000ab3bf0 sp=0xc000ab3b40 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy.func1()
	pkg/sentry/vfs/mount.go:826 +0x28 fp=0xc000ab3c18 sp=0xc000ab3bf0 pc=0x79a8e8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy(0xc000a9a6e0, {0x1580618, 0xc00355a000})
	pkg/sentry/vfs/mount.go:839 +0x282 fp=0xc000ab3cb8 sp=0xc000ab3c18 pc=0x79a842
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).DecRef(0xc000a9a6e0, {0x1580618, 0xc00355a000})
	pkg/sentry/vfs/mount.go:820 +0xa5 fp=0xc000ab3ce0 sp=0xc000ab3cb8 pc=0x79a585
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc000028c58, {0x1580618, 0xc00355a000})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc000ab3d90 sp=0xc000ab3ce0 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).Destroy(0xc00b8941b0, {0x1580618, 0xc00355a000})
	pkg/sentry/vfs/namespace.go:201 +0x99 fp=0xc000ab3dc8 sp=0xc000ab3d90 pc=0x7a1d99
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef.func1()
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x38 fp=0xc000ab3df0 sp=0xc000ab3dc8 pc=0x8486b8
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).DecRef(0x0?, 0xc000ab3e68)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/nsfs/inode_refs.go:132 +0x75 fp=0xc000ab3e58 sp=0xc000ab3df0 pc=0x8481d5
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef(0xc00355a000?, {0x1580618?, 0xc00355a000?})
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x5c fp=0xc000ab3e98 sp=0xc000ab3e58 pc=0x84863c
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).DecRef(...)
	pkg/sentry/vfs/namespace.go:216
gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc003fc5a00, 0xc00355a000)
	pkg/sentry/kernel/task_exit.go:297 +0x56b fp=0xc000ab3f48 sp=0xc000ab3e98 pc=0xa074eb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00355a000, 0x6a9a)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc000ab3fc0 sp=0xc000ab3f48 pc=0xa13e62
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x25 fp=0xc000ab3fe0 sp=0xc000ab3fc0 pc=0xa20e85
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc000ab3fe8 sp=0xc000ab3fe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 609826
	pkg/sentry/kernel/task_start.go:391 +0xf8