From: Pan Bian Date: Sat, 3 Dec 2016 15:11:42 +0000 (+0800) Subject: drm/qxl: fix use of uninitialized variable X-Git-Tag: v4.10-rc1~154^2~6^2~10 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=16571a8a435abf73cde769918850ca76a471f14c;p=karo-tx-linux.git 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 [seanpaul fixed up subject prefix] Signed-off-by: Sean Paul Link: http://patchwork.freedesktop.org/patch/msgid/1480777902-7648-1-git-send-email-bianpan2016@163.com --- diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c index 50b4e522f05f..e6ec845b5be0 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;