D22571: Allow blacklisting some wayland interfaces

fvogt added inline comments.

INLINE COMMENTS

> davidedmundson wrote in wayland_server.cpp:223
> This has the same bug as outlined in the task.
> 
> The exe will resolve the file path that we see in kwins namespace, not the exe being run within the clients mountnamespace. We're comparing a process with itself.
> 
> We need to compare to  /proc/PID/root/ + client->executablePath()

AFAICT, "We're comparing a process with itself." is still the case.

It would need to compare the content of `client->executablePath()` with `/proc/pid/exe`, but even that can be faked easily.

Note that procfs is unusual - sha256("/proc/pid/exe") != sha256(readlink("/proc/pid/exe"))

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D22571

To: apol, #plasma, #kwin, davidedmundson
Cc: fvogt, zzag, broulik, graesslin, davidedmundson, kwin, LeGast00n, fmonteiro, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, mart