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: omap-for-v4.3/fixes-rc5~12^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c55627167870255158db1cde0d28366f91c8872;p=pandora-kernel.git

drivers/tty: require read access for controlling terminal

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>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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