From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Mon, 27 Mar 2017 09:09:08 +0000 (+0200)
Subject: drm/vmwgfx: Type-check lookups of fence objects
X-Git-Tag: v3.2.91~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b989fa8e683f024aafdce3fa8b77189b03b3935;p=pandora-kernel.git

drm/vmwgfx: Type-check lookups of fence objects

commit f7652afa8eadb416b23eb57dec6f158529942041 upstream.

A malicious caller could otherwise hand over handles to other objects
causing all sorts of interesting problems.

Testing done: Ran a Fedora 25 desktop using both Xorg and
gnome-shell/Wayland.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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