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

goroutine 340 [running]:
panic({0xe92cc0, 0x124ab78})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc000217298 sp=0xc0002171d8 pc=0x435a77
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0002172e8?, {0x1264dd0?, 0xc000466a80?})
	pkg/sentry/fsimpl/kernfs/kernfs.go:290 +0xa5 fp=0xc0002172c0 sp=0xc000217298 pc=0x792a85
gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(...)
	pkg/sentry/vfs/dentry.go:155
gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc0003cc580?, 0xc00025c1b0?}, {0x1264dd0, 0xc000466a80})
	pkg/sentry/vfs/vfs.go:926 +0x45 fp=0xc0002172f0 sp=0xc0002172c0 pc=0x733545
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt.func2()
	pkg/sentry/vfs/mount.go:575 +0x32 fp=0xc000217320 sp=0xc0002172f0 pc=0x725372
runtime.deferreturn()
	GOROOT/src/runtime/panic.go:436 +0x33 fp=0xc000217360 sp=0xc000217320 pc=0x434b93
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt(0xc0004ac1d0, {0x1264dd0?, 0xc000466a80}, 0xc00025c120?, 0xc0005b5000?, 0x7?)
	pkg/sentry/vfs/mount.go:604 +0x5d0 fp=0xc0002175b0 sp=0xc000217360 pc=0x724ed0
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mount(0xc000466a80, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f505880de78}})
	pkg/sentry/syscalls/linux/sys_mount.go:84 +0x86e fp=0xc0002178a0 sp=0xc0002175b0 pc=0xa18b2e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000466a80, 0xa5, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f505880de78}})
	pkg/sentry/kernel/task_syscall.go:142 +0x755 fp=0xc000217c90 sp=0xc0002178a0 pc=0x8f3c15
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000466a80, 0xc0001d63a8?, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f505880de78}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4a fp=0xc000217cf0 sp=0xc000217c90 pc=0x8f4e4a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x0?, 0xc0004b0000?, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7f505880de78}})
	pkg/sentry/kernel/task_syscall.go:282 +0x65 fp=0xc000217d50 sp=0xc000217cf0 pc=0x8f4b25
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00057e0d0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2f0 fp=0xc000217e48 sp=0xc000217d50 pc=0x8f4890
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0001c2900?, 0xc000466a80)
	pkg/sentry/kernel/task_run.go:253 +0xdea fp=0xc000217f60 sp=0xc000217e48 pc=0x8e8e2a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000466a80, 0xc)
	pkg/sentry/kernel/task_run.go:94 +0x1ac fp=0xc000217fc0 sp=0xc000217f60 pc=0x8e7a2c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:378 +0x2a fp=0xc000217fe0 sp=0xc000217fc0 pc=0x8f246a
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc000217fe8 sp=0xc000217fe0 pc=0x469781
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:378 +0xf9