[PATCH 0/2] restrict statistics information to user

[Vasiliy Kulikov]

taskstats and /proc/PID/io may be used for gathering private
information.  E.g. for openssh and vsftpd daemons wchars/rchars may be
used to learn the precise password length (pass_len = w_chars - CONST).
Restrict it to user.

The simplified proof learning whether ~*/.ssh/authorized_keys file
exists is posted here:
http://www.openwall.com/lists/oss-security/2011/06/21/12

Vasiliy Kulikov (2):
  proc: restrict access to /proc/PID/io
  taskstats: restrict access to user

 fs/proc/base.c     |    7 +++++--
 kernel/taskstats.c |   23 ++++++++++++++++++++++-
 2 files changed, 27 insertions(+), 3 deletions(-)

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