Patch "qxl: check for kmap failures" has been added to the 4.7-stable tree

Patch "qxl: check for kmap failures" has been added to the 4.7-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    qxl: check for kmap failures

to the 4.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     qxl-check-for-kmap-failures.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f4cceb2affcd1285d4ce498089e8a79f4cd2fa66 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 11 Jul 2016 11:46:33 +0300
Subject: qxl: check for kmap failures

From: Dan Carpenter <dan.carpenter@oracle.com>

commit f4cceb2affcd1285d4ce498089e8a79f4cd2fa66 upstream.

If kmap fails, it leads to memory corruption.

Fixes: f64122c1f6ad ('drm: add new QXL driver. (v1.4)')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160711084633.GA31411@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/qxl/qxl_draw.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/qxl/qxl_draw.c
+++ b/drivers/gpu/drm/qxl/qxl_draw.c
@@ -136,6 +136,8 @@ static int qxl_palette_create_1bit(struc
 				 * correctly globaly, since that would require
 				 * tracking all of our palettes. */
 	ret = qxl_bo_kmap(palette_bo, (void **)&pal);
+	if (ret)
+		return ret;
 	pal->num_ents = 2;
 	pal->unique = unique++;
 	if (visual == FB_VISUAL_TRUECOLOR || visual == FB_VISUAL_DIRECTCOLOR) {


Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.7/mtd-pmcmsp-flash-allocating-too-much-in-init_msp_flash.patch
queue-4.7/hostfs-freeing-an-err_ptr-in-hostfs_fill_sb_common.patch
queue-4.7/mtd-maps-sa1100-flash-potential-null-dereference.patch
queue-4.7/qxl-check-for-kmap-failures.patch
queue-4.7/power-supply-max17042_battery-fix-model-download-bug.patch