Re: [PATCH v10 3/3] mm: add anonymous vma name refcounting

[Kees Cook]

On Fri, Oct 08, 2021 at 09:43:59AM +0200, David Hildenbrand wrote:
> I'm going to point out that we already do have names for memfds.

I just did the same here[1]. :P

> [...] It's also displayed in /proc/self/maps.

I missed that part! /me screams forever

We really need to filter this at creation time. :( At least
seq_file_path() escapes "\n" for it, but not "\r", so humans on a
terminal could get very confused...

$ ./memfd '^M0000000000000000-ffffffffffffffff rwxp 00000000 00:00 0 [stack]' &
[1] 2953833
$ cat /proc/2953833/maps
...
0000000000000000-ffffffffffffffff rwxp 00000000 00:00 0     [stack] (deleted)
...


-Kees

[1] https://lore.kernel.org/lkml/202110081344.FE6A7A82@keescook

-- 
Kees Cook