From: Jann Horn <jann@thejh.net>
Date: Sun, 4 Oct 2015 17:29:12 +0000 (+0200)
Subject: drivers/tty: require read access for controlling terminal
X-Git-Tag: v3.2.73~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db0054fe613b21cd65c1609680cc47c520760044;p=pandora-kernel.git

drivers/tty: require read access for controlling terminal

commit 0c55627167870255158db1cde0d28366f91c8872 upstream.

This is mostly a hardening fix, given that write-only access to other
users' ttys is usually only given through setgid tty executables.

Signed-off-by: Jann Horn <jann@thejh.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2:
 - __proc_set_tty() also takes a task_struct pointer]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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