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Date: Mon, 25 Jul 2016 13:55:34 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Dmitrii Tcvetkov <demfloro@...floro.ru>,
Ilia Mirkin <imirkin@...m.mit.edu>,
Ben Skeggs <bskeggs@...hat.com>
Subject: [PATCH 4.4 079/146] drm/nouveau: fix for disabled fbdev emulation
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitrii Tcvetkov <demfloro@...floro.ru>
commit 52dfcc5ccfbb6697ac3cac7f7ff1e712760e1216 upstream.
Hello,
after this commit:
commit f045f459d925138fe7d6193a8c86406bda7e49da
Author: Ben Skeggs <bskeggs@...hat.com>
Date: Thu Jun 2 12:23:31 2016 +1000
drm/nouveau/fbcon: fix out-of-bounds memory accesses
kernel started to oops when loading nouveau module when using GTX 780 Ti
video adapter. This patch fixes the problem.
Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=120591
Signed-off-by: Dmitrii Tcvetkov <demfloro@...floro.ru>
Suggested-by: Ilia Mirkin <imirkin@...m.mit.edu>
Fixes: f045f459d925 ("nouveau_fbcon_init()")
Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/gpu/drm/nouveau/nouveau_fbcon.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -557,7 +557,8 @@ nouveau_fbcon_init(struct drm_device *de
if (ret)
goto fini;
- fbcon->helper.fbdev->pixmap.buf_align = 4;
+ if (fbcon->helper.fbdev)
+ fbcon->helper.fbdev->pixmap.buf_align = 4;
return 0;
fini:
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