panic: kernfs.Dentry.DecRef() called without holding a reference

goroutine 654486 [running]:
panic(0x11d1600, 0x1565508)
	GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc0195357d8 sp=0xc019535710 pc=0x437c65
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0a56a8f30, 0x15aa480, 0xc010cd7500)
	pkg/sentry/fsimpl/kernfs/kernfs.go:312 +0x11f fp=0xc019535800 sp=0xc0195357d8 pc=0x8a979f
gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc0a56a8f30, 0x15aa480, 0xc010cd7500)
	pkg/sentry/vfs/dentry.go:163 +0x52 fp=0xc019535828 sp=0xc019535800 pc=0x771ed2
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountDisconnected(0xc00023f078, 0x15aa480, 0xc010cd7500, 0xc0188fc0c0, 0xc00bf45b00, 0x27, 0xc00bf45a00, 0x6, 0xc019535ab0, 0xc004ee0720, ...)
	pkg/sentry/vfs/mount.go:226 +0x2cc fp=0xc0195358f8 sp=0xc019535828 pc=0x783aec
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountAt(0xc00023f078, 0x15aa480, 0xc010cd7500, 0xc0188fc0c0, 0xc00bf45b00, 0x27, 0xc019535ae0, 0xc00bf45a00, 0x6, 0xc019535ab0, ...)
	pkg/sentry/vfs/mount.go:307 +0xde fp=0xc019535998 sp=0xc0195358f8 pc=0x78415e
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Mount(0xc010cd7500, 0x200013c0, 0x20000100, 0x20000080, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/vfs2/mount.go:141 +0x618 fp=0xc019535ba8 sp=0xc019535998 pc=0xf2d878
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc010cd7500, 0xa5, 0x200013c0, 0x20000100, 0x20000080, 0x0, 0x0, 0x0, 0xc000001fa0, 0x13ddd80, ...)
	pkg/sentry/kernel/task_syscall.go:115 +0x1b9 fp=0xc019535c68 sp=0xc019535ba8 pc=0xa66639
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc010cd7500, 0xa5, 0x200013c0, 0x20000100, 0x20000080, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:290 +0x70 fp=0xc019535cf0 sp=0xc019535c68 pc=0xa67910
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc010cd7500, 0xa5, 0x200013c0, 0x20000100, 0x20000080, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:237 +0xb4 fp=0xc019535d50 sp=0xc019535cf0 pc=0xa673f4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc010cd7500, 0x2, 0xc010cd7500)
	pkg/sentry/kernel/task_syscall.go:204 +0x198 fp=0xc019535e20 sp=0xc019535d50 pc=0xa66cd8
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc010cd7500, 0x157e4c0, 0x0)
	pkg/sentry/kernel/task_run.go:327 +0xe15 fp=0xc019535f60 sp=0xc019535e20 pc=0xa59b95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc010cd7500, 0x387a)
	pkg/sentry/kernel/task_run.go:100 +0x1e2 fp=0xc019535fd0 sp=0xc019535f60 pc=0xa58622
runtime.goexit()
	src/runtime/asm_amd64.s:1371 +0x1 fp=0xc019535fd8 sp=0xc019535fd0 pc=0x472861
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:380 +0x116