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

goroutine 167 [running]:
panic({0x1614fa0, 0x1af24a0})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc000410e38 sp=0xc000410d78 pc=0x438397
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0003d86c0, {0x1b0c790, 0xc0001f8a80})
	pkg/sentry/fsimpl/kernfs/kernfs.go:290 +0xcd fp=0xc000410e68 sp=0xc000410e38 pc=0x9f620d
gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(...)
	pkg/sentry/vfs/dentry.go:155
gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc00057a480?, 0xc0003d86c0?}, {0x1b0c790, 0xc0001f8a80})
	pkg/sentry/vfs/vfs.go:926 +0x75 fp=0xc000410ea0 sp=0xc000410e68 pc=0x952cf5
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt.func2()
	pkg/sentry/vfs/mount.go:575 +0x65 fp=0xc000410ef0 sp=0xc000410ea0 pc=0x93c9c5
runtime.deferreturn()
	GOROOT/src/runtime/panic.go:436 +0x33 fp=0xc000410f30 sp=0xc000410ef0 pc=0x4374b3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt(0xc0004041d0, {0x1b0c790?, 0xc0001f8a80}, 0xc0003d8630?, 0xc0005cb500?, 0x7?)
	pkg/sentry/vfs/mount.go:604 +0x7cb fp=0xc0004111e0 sp=0xc000410f30 pc=0x93c38b
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mount(0xc0001f8a80, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f5701237e78}})
	pkg/sentry/syscalls/linux/sys_mount.go:84 +0xb05 fp=0xc000411508 sp=0xc0004111e0 pc=0xe242c5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0001f8a80, 0xa5, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f5701237e78}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9b8 fp=0xc000411a18 sp=0xc000411508 pc=0xc3b038
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0001f8a80, 0x0?, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f5701237e78}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc000411ab0 sp=0xc000411a18 pc=0xc3cd9d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0003fe0d0?, 0xc0004de4b0?, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f5701237e78}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc000411b28 sp=0xc000411ab0 pc=0xc3c78f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0001f8a80)
	pkg/sentry/kernel/task_syscall.go:257 +0x496 fp=0xc000411c50 sp=0xc000411b28 pc=0xc3c336
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0001f8a80?, 0xc0001f8a80)
	pkg/sentry/kernel/task_run.go:253 +0x18f9 fp=0xc000411ec0 sp=0xc000411c50 pc=0xc27979
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0001f8a80, 0x10)
	pkg/sentry/kernel/task_run.go:94 +0x354 fp=0xc000411fb0 sp=0xc000411ec0 pc=0xc25714
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:378 +0x48 fp=0xc000411fe0 sp=0xc000411fb0 pc=0xc38c28
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc000411fe8 sp=0xc000411fe0 pc=0x46e1c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:378 +0x1a8