panic: Decrementing non-positive ref count 0xc0009d4750, owned by vfs.Filesystem

goroutine 411131 [running]:
panic({0x10f2ce0?, 0xc008501c20?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc009f8fa98 sp=0xc009f8f9e8 pc=0x43a72c
gvisor.dev/gvisor/pkg/sentry/vfs.(*FilesystemRefs).DecRef(0xc0009d4750, 0xc00748a340?)
	bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/filesystem_refs.go:126 +0x154 fp=0xc009f8fb00 sp=0xc009f8fa98 pc=0x791474
gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef(0x1207460?, {0x1580618?, 0xc005437500?})
	pkg/sentry/vfs/filesystem.go:77 +0x55 fp=0xc009f8fb40 sp=0xc009f8fb00 pc=0x790a55
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc00028b6d8, {0x1580618, 0xc005437500})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc009f8fbf0 sp=0xc009f8fb40 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy.func1()
	pkg/sentry/vfs/mount.go:826 +0x28 fp=0xc009f8fc18 sp=0xc009f8fbf0 pc=0x79a8e8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy(0xc000d4a420, {0x1580618, 0xc005437500})
	pkg/sentry/vfs/mount.go:839 +0x282 fp=0xc009f8fcb8 sp=0xc009f8fc18 pc=0x79a842
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).DecRef(0xc000d4a420, {0x1580618, 0xc005437500})
	pkg/sentry/vfs/mount.go:820 +0xa5 fp=0xc009f8fce0 sp=0xc009f8fcb8 pc=0x79a585
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc00028b6d8, {0x1580618, 0xc005437500})
	pkg/sentry/vfs/vfs.go:1030 +0x1df fp=0xc009f8fd90 sp=0xc009f8fce0 pc=0x7afedf
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).Destroy(0xc0037a3d70, {0x1580618, 0xc005437500})
	pkg/sentry/vfs/namespace.go:201 +0x99 fp=0xc009f8fdc8 sp=0xc009f8fd90 pc=0x7a1d99
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef.func1()
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x38 fp=0xc009f8fdf0 sp=0xc009f8fdc8 pc=0x8486b8
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).DecRef(0x0?, 0xc009f8fe68)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/nsfs/inode_refs.go:132 +0x75 fp=0xc009f8fe58 sp=0xc009f8fdf0 pc=0x8481d5
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef(0xc005437500?, {0x1580618?, 0xc005437500?})
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x5c fp=0xc009f8fe98 sp=0xc009f8fe58 pc=0x84863c
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).DecRef(...)
	pkg/sentry/vfs/namespace.go:216
gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc00586d280, 0xc005437500)
	pkg/sentry/kernel/task_exit.go:297 +0x56b fp=0xc009f8ff48 sp=0xc009f8fe98 pc=0xa074eb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc005437500, 0x52bb)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc009f8ffc0 sp=0xc009f8ff48 pc=0xa13e62
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x25 fp=0xc009f8ffe0 sp=0xc009f8ffc0 pc=0xa20e85
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc009f8ffe8 sp=0xc009f8ffe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 411116
	pkg/sentry/kernel/task_start.go:391 +0xf8