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

goroutine 165 [running]:
panic({0x314840, 0xc000734ed0})
	GOROOT/src/runtime/panic.go:987 +0x3ac fp=0xc000edaff0 sp=0xc000edaf30 pc=0x11a9d6c
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc0002042d0?, 0x469000, 0x35eea0)
	GOROOT/src/runtime/iface.go:272 +0x70 fp=0xc000edb020 sp=0xc000edaff0 pc=0x117ec20
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0xc000204280, {0x768aa0, 0xc000abd500}, 0xc000cc0480, {0xb2d8?, 0xed?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x670 fp=0xc000edb280 sp=0xc000edb020 pc=0x16eca40
gvisor.dev/gvisor/pkg/sentry/fsimpl/sys.(*filesystem).MkdirAt(0xc000204280, {0x768aa0, 0xc000abd500}, 0xc000cc0480?, {0x12?, 0x0?})
	<autogenerated>:1 +0x60 fp=0xc000edb2e0 sp=0xc000edb280 pc=0x1fcab90
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc0012ac400?, {0x768aa0, 0xc000abd500}, 0x0?, 0xc000edb478, 0xc000edb3c4)
	pkg/sentry/vfs/vfs.go:367 +0x2d0 fp=0xc000edb370 sp=0xc000edb2e0 pc=0x1653d60
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc000abd500, 0x11e20a8?, 0xc000edb548?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x1f8 fp=0xc000edb520 sp=0xc000edb370 pc=0x1ae1928
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc000abd500?, 0x153?, {{0xffffffffffffff9c}, {0xf6fba5de85e0}, {0x1ff}, {0xefdb6ff91654}, {0xefdb6ff3b8e0}, {0xefdb6ff3b8e0}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0x94 fp=0xc000edb580 sp=0xc000edb520 pc=0x1ae16e4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000abd500, 0x22, {{0xffffffffffffff9c}, {0xf6fba5de85e0}, {0x1ff}, {0xefdb6ff91654}, {0xefdb6ff3b8e0}, {0xefdb6ff3b8e0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80c fp=0xc000edb9a0 sp=0xc000edb580 pc=0x192612c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000abd500, 0x1?, {{0xffffffffffffff9c}, {0xf6fba5de85e0}, {0x1ff}, {0xefdb6ff91654}, {0xefdb6ff3b8e0}, {0xefdb6ff3b8e0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x60 fp=0xc000edba40 sp=0xc000edb9a0 pc=0x1927ab0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0005694a0?, 0x11e1f18?, {{0xffffffffffffff9c}, {0xf6fba5de85e0}, {0x1ff}, {0xefdb6ff91654}, {0xefdb6ff3b8e0}, {0xefdb6ff3b8e0}})
	pkg/sentry/kernel/task_syscall.go:282 +0xa8 fp=0xc000edbac0 sp=0xc000edba40 pc=0x1927518
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000abd500)
	pkg/sentry/kernel/task_syscall.go:257 +0x450 fp=0xc000edbbf0 sp=0xc000edbac0 pc=0x1927160
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000abd500?, 0xc000abd500)
	pkg/sentry/kernel/task_run.go:269 +0x1830 fp=0xc000edbe50 sp=0xc000edbbf0 pc=0x1915170
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000abd500, 0x13)
	pkg/sentry/kernel/task_run.go:98 +0x270 fp=0xc000edbfa0 sp=0xc000edbe50 pc=0x1913120
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x44 fp=0xc000edbfd0 sp=0xc000edbfa0 pc=0x1924114
runtime.goexit()
	src/runtime/asm_arm64.s:1172 +0x4 fp=0xc000edbfd0 sp=0xc000edbfd0 pc=0x11e0f24
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0x1a4