From: Torben Hohn <torbenh@gmx.de>
Date: Thu, 3 Mar 2011 17:26:14 +0000 (+0100)
Subject: posix-clocks: Check write permissions in posix syscalls
X-Git-Tag: v2.6.39-rc1~508^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e6823d17b157f185be09f4c70181299f9273f0b;p=pandora-kernel.git

posix-clocks: Check write permissions in posix syscalls

pc_clock_settime() and pc_clock_adjtime() do not check whether the fd
was opened in write mode, so a clock can be set with a read only fd.

[ tglx: We deliberately do not return -EPERM as we want this to be
  	distingushable from the capability based permission check ]

Signed-off-by: Torben Hohn <torbenh@gmx.de>
LKML-Reference: <1299173174-348-4-git-send-email-torbenh@gmx.de>
Cc: Richard Cochran <richard.cochran@omicron.at>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
---

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