panic: interface conversion: vfs.DentryImpl is *tmpfs.dentry, not *kernfs.Dentry

goroutine 181 [running]:
panic({0x1167ac0, 0xc000a45020})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc000af7470 sp=0xc000af73b0 pc=0x436abb
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc000af74b0?, 0x12b6640, 0x11b1600)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc000af7498 sp=0xc000af7470 pc=0x40b45c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0xc00072a6e0, {0x15350c0, 0xc000773500}, 0xc000028480, {0xe6c0?, 0xce?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x805 fp=0xc000af76c8 sp=0xc000af7498 pc=0x806b25
gvisor.dev/gvisor/pkg/sentry/fsimpl/devpts.(*filesystem).MkdirAt(0xc00072e1e0?, {0x15350c0?, 0xc000773500?}, 0xc000028480?, {0x0?, 0x0?})
	<autogenerated>:1 +0x2e fp=0xc000af7700 sp=0xc000af76c8 pc=0xe1f4ae
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc000cee6c0?, {0x15350c0, 0xc000773500}, 0xc00073fc00?, 0xc00081d400?, 0xc000af77f4)
	pkg/sentry/vfs/vfs.go:367 +0x191 fp=0xc000af7760 sp=0xc000af7700 pc=0x796e91
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc000773500, 0x4?, 0xc000770100?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x28b fp=0xc000af78e8 sp=0xc000af7760 pc=0xb3f06b
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc000773500?, 0x3?, {{0xffffff9c}, {0x7fe35c6b55c0}, {0x1ff}, {0x0}, {0x3}, {0x7fe35c6b52d7}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0x50 fp=0xc000af7918 sp=0xc000af78e8 pc=0xb3edb0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000773500, 0x102, {{0xffffff9c}, {0x7fe35c6b55c0}, {0x1ff}, {0x0}, {0x3}, {0x7fe35c6b52d7}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc000af7c58 sp=0xc000af7918 pc=0x9d72cb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000773500, 0x0?, {{0xffffff9c}, {0x7fe35c6b55c0}, {0x1ff}, {0x0}, {0x3}, {0x7fe35c6b52d7}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc000af7cb8 sp=0xc000af7c58 pc=0x9d88b4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00002a5e0?, 0xc000af7e00?, {{0xffffff9c}, {0x7fe35c6b55c0}, {0x1ff}, {0x0}, {0x3}, {0x7fe35c6b52d7}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc000af7d18 sp=0xc000af7cb8 pc=0x9d84a5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0007780b0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc000af7e10 sp=0xc000af7d18 pc=0x9d816c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000a9d180?, 0xc000773500)
	pkg/sentry/kernel/task_run.go:269 +0x144a fp=0xc000af7f48 sp=0xc000af7e10 pc=0x9c9c2a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000773500, 0x1b)
	pkg/sentry/kernel/task_run.go:98 +0x25c fp=0xc000af7fc0 sp=0xc000af7f48 pc=0x9c80dc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x2a fp=0xc000af7fe0 sp=0xc000af7fc0 pc=0x9d574a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc000af7fe8 sp=0xc000af7fe0 pc=0x46d4c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0x105