From 16571a8a435abf73cde769918850ca76a471f14c Mon Sep 17 00:00:00 2001
From: Pan Bian <bianpan2016@163.com>
Date: Sat, 3 Dec 2016 23:11:42 +0800
Subject: [PATCH] drm/qxl: fix use of uninitialized variable
In function qxl_release_alloc(), when kmalloc() returns a NULL pointer,
it returns value 0 and parameter *ret is uninitialized. 0 means no error
to the callers of qxl_release_alloc(). The callers keep going and will
try to reference the uninitialized variable. This patch fixes the bug,
returning "-ENOMEM" when kmalloc() fails.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188911
Signed-off-by: Pan Bian <bianpan2016@163.com>
[seanpaul fixed up subject prefix]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1480777902-7648-1-git-send-email-bianpan2016@163.com
---
drivers/gpu/drm/qxl/qxl_release.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 50b4e522f05fe..e6ec845b5be09 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -134,7 +134,7 @@ qxl_release_alloc(struct qxl_device *qdev, int type,
release = kmalloc(size, GFP_KERNEL);
if (!release) {
DRM_ERROR("Out of memory\n");
- return 0;
+ return -ENOMEM;
}
release->base.ops = NULL;
release->type = type;
--
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