From: Dan Carpenter <dan.carpenter@oracle.com>
To: Dave Airlie <airlied@redhat.com>, Alon Levy <alevy@redhat.com>
Cc: David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [patch 1/2] qxl: check for kmap failures
Date: Mon, 11 Jul 2016 08:46:33 +0000 [thread overview]
Message-ID: <20160711084633.GA31411@mwanda> (raw)
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>
diff --git a/drivers/gpu/drm/qxl/qxl_draw.c b/drivers/gpu/drm/qxl/qxl_draw.c
index 56e1d63..6e6c760 100644
--- 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(struct qxl_bo *palette_bo,
* 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) {
reply other threads:[~2016-07-11 8:46 UTC|newest]
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