panic: Decrementing non-positive ref count 0xc0006e0b60, owned by vfs.Filesystem

goroutine 159 [running]:
panic({0x10f2ce0?, 0xc0006cc320?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc001019a38 sp=0xc001019988 pc=0x43a72c
gvisor.dev/gvisor/pkg/sentry/vfs.(*FilesystemRefs).DecRef(0xc0006e0b60, 0xc000c82570?)
	bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/filesystem_refs.go:126 +0x154 fp=0xc001019aa0 sp=0xc001019a38 pc=0x791474
gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef(0xc001019b20?, {0x1580618?, 0xc000960a80?})
	pkg/sentry/vfs/filesystem.go:77 +0x55 fp=0xc001019ae0 sp=0xc001019aa0 pc=0x790a55
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc0002776d8, {0x1580618, 0xc000960a80})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc001019b90 sp=0xc001019ae0 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy.func1()
	pkg/sentry/vfs/mount.go:826 +0x28 fp=0xc001019bb8 sp=0xc001019b90 pc=0x79a8e8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy(0xc000ab6000, {0x1580618, 0xc000960a80})
	pkg/sentry/vfs/mount.go:839 +0x282 fp=0xc001019c58 sp=0xc001019bb8 pc=0x79a842
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).DecRef(0xc000ab6000, {0x1580618, 0xc000960a80})
	pkg/sentry/vfs/mount.go:820 +0xa5 fp=0xc001019c80 sp=0xc001019c58 pc=0x79a585
gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc000ab6000?, 0xc000a9a000?}, {0x1580618, 0xc000960a80})
	pkg/sentry/vfs/vfs.go:1086 +0x67 fp=0xc001019cb0 sp=0xc001019c80 pc=0x7b0047
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualDentry).DecRef(0xc001019d20?, {0x1580618?, 0xc000960a80?})
	<autogenerated>:1 +0x3e fp=0xc001019ce0 sp=0xc001019cb0 pc=0x7bf8be
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc0002776d8, {0x1580618, 0xc000960a80})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc001019d90 sp=0xc001019ce0 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).Destroy(0xc0006b9650, {0x1580618, 0xc000960a80})
	pkg/sentry/vfs/namespace.go:201 +0x99 fp=0xc001019dc8 sp=0xc001019d90 pc=0x7a1d99
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef.func1()
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x38 fp=0xc001019df0 sp=0xc001019dc8 pc=0x8486b8
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).DecRef(0x0?, 0xc001019e68)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/nsfs/inode_refs.go:132 +0x75 fp=0xc001019e58 sp=0xc001019df0 pc=0x8481d5
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef(0xc000960a80?, {0x1580618?, 0xc000960a80?})
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x5c fp=0xc001019e98 sp=0xc001019e58 pc=0x84863c
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).DecRef(...)
	pkg/sentry/vfs/namespace.go:216
gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc000960a80, 0xc000960a80)
	pkg/sentry/kernel/task_exit.go:297 +0x56b fp=0xc001019f48 sp=0xc001019e98 pc=0xa074eb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000960a80, 0x13)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc001019fc0 sp=0xc001019f48 pc=0xa13e62
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x25 fp=0xc001019fe0 sp=0xc001019fc0 pc=0xa20e85
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc001019fe8 sp=0xc001019fe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 156
	pkg/sentry/kernel/task_start.go:391 +0xf8