From: Grazvydas Ignotas <notasas@gmail.com>
Date: Thu, 12 Feb 2015 23:00:19 +0000 (-0800)
Subject: mm/memory.c: actually remap enough memory
X-Git-Tag: fixes-v4.0-rc1~115^2~64
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9cb12d7b4ccaa976f97ce0c5fd0f1b6a83bc2a75;p=pandora-kernel.git

mm/memory.c: actually remap enough memory

For whatever reason, generic_access_phys() only remaps one page, but
actually allows to access arbitrary size.  It's quite easy to trigger
large reads, like printing out large structure with gdb, which leads to a
crash.  Fix it by remapping correct size.

Fixes: 28b2ee20c7cb ("access_process_vm device memory infrastructure")
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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