From: Xi Wang <xi.wang@gmail.com>
Date: Wed, 23 Nov 2011 06:12:01 +0000 (-0500)
Subject: drm: integer overflow in drm_mode_dirtyfb_ioctl()
X-Git-Tag: v3.2-rc3~8^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a5cd335165e31db9dbab636fd29895d41da55dd2;p=pandora-kernel.git

drm: integer overflow in drm_mode_dirtyfb_ioctl()

There is a potential integer overflow in drm_mode_dirtyfb_ioctl()
if userspace passes in a large num_clips.  The call to kmalloc would
allocate a small buffer, and the call to fb->funcs->dirty may result
in a memory corruption.

Reported-by: Haogang Chen <haogangchen@gmail.com>
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
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