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

goroutine 404 [running]:
panic({0x1614fa0, 0x1af24a0})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc0006c6e38 sp=0xc0006c6d78 pc=0x438397
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0003685a0, {0x1b0c790, 0xc000968a80})
	pkg/sentry/fsimpl/kernfs/kernfs.go:290 +0xcd fp=0xc0006c6e68 sp=0xc0006c6e38 pc=0x9f620d
gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(...)
	pkg/sentry/vfs/dentry.go:155
gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc0001e0780?, 0xc0003685a0?}, {0x1b0c790, 0xc000968a80})
	pkg/sentry/vfs/vfs.go:926 +0x75 fp=0xc0006c6ea0 sp=0xc0006c6e68 pc=0x952cf5
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt.func2()
	pkg/sentry/vfs/mount.go:575 +0x65 fp=0xc0006c6ef0 sp=0xc0006c6ea0 pc=0x93c9c5
runtime.deferreturn()
	GOROOT/src/runtime/panic.go:436 +0x33 fp=0xc0006c6f30 sp=0xc0006c6ef0 pc=0x4374b3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt(0xc000044dd0, {0x1b0c790?, 0xc000968a80}, 0xc000368510?, 0xc00018d200?, 0x7?)
	pkg/sentry/vfs/mount.go:604 +0x7cb fp=0xc0006c71e0 sp=0xc0006c6f30 pc=0x93c38b
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mount(0xc000968a80, {{0x20000240}, {0x20000280}, {0x0}, {0x11400}, {0x0}, {0x7f445dbe0e78}})
	pkg/sentry/syscalls/linux/sys_mount.go:84 +0xb05 fp=0xc0006c7508 sp=0xc0006c71e0 pc=0xe242c5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000968a80, 0xa5, {{0x20000240}, {0x20000280}, {0x0}, {0x11400}, {0x0}, {0x7f445dbe0e78}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9b8 fp=0xc0006c7a18 sp=0xc0006c7508 pc=0xc3b038
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000968a80, 0x0?, {{0x20000240}, {0x20000280}, {0x0}, {0x11400}, {0x0}, {0x7f445dbe0e78}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc0006c7ab0 sp=0xc0006c7a18 pc=0xc3cd9d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0001748f0?, 0xc0005fe4b0?, {{0x20000240}, {0x20000280}, {0x0}, {0x11400}, {0x0}, {0x7f445dbe0e78}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc0006c7b28 sp=0xc0006c7ab0 pc=0xc3c78f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000968a80)
	pkg/sentry/kernel/task_syscall.go:257 +0x496 fp=0xc0006c7c50 sp=0xc0006c7b28 pc=0xc3c336
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000968a80?, 0xc000968a80)
	pkg/sentry/kernel/task_run.go:253 +0x18f9 fp=0xc0006c7ec0 sp=0xc0006c7c50 pc=0xc27979
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000968a80, 0x11)
	pkg/sentry/kernel/task_run.go:94 +0x354 fp=0xc0006c7fb0 sp=0xc0006c7ec0 pc=0xc25714
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:378 +0x48 fp=0xc0006c7fe0 sp=0xc0006c7fb0 pc=0xc38c28
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc0006c7fe8 sp=0xc0006c7fe0 pc=0x46e1c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:378 +0x1a8