From: Dave Reisner <dreisner@archlinux.org>
Date: Sat, 8 Sep 2012 15:55:45 +0000 (-0400)
Subject: block: reject invalid queue attribute values
X-Git-Tag: v3.7-rc1~54^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b1f3b64d76cf88cc250e5cdd1de783ba9737078e;p=pandora-kernel.git

block: reject invalid queue attribute values

Instead of using simple_strtoul which "converts" invalid numbers to 0,
use strict_strtoul and perform error checking to ensure that userspace
passes us a valid unsigned long. This addresses problems with functions
such as writev, which might want to write a trailing newline -- the
newline should rightfully be rejected, but the value preceeding it
should be preserved.

Fixes BZ#46981.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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