Re: [PATCH v7 3/3] mm: add a field to store names for private anonymous memory

Matthew Wilcox
2020-09-03T13:44:08Z

On Thu, Sep 03, 2020 at 04:25:37PM +0300, Kirill A. Shutemov wrote:
> IIUC, it gives userspace direct control of content of /proc/$PID/maps and
> /proc/$PID/smaps. There's no verification of the given string whatsoever.
> I'm sure security experts would find clever usage of the feature :P

What, you think that naming a VMA
"\n55bc3e0f9000-55bc3e0fb000 r--p 00000000 fd:01 16777285 /bin/cat" might cause problems?

Would it be enough to restrict the characters to isalnum()?