From 04cfe97eb11c28848d14ba8c88124da31a9f881c Mon Sep 17 00:00:00 2001
From: Xiubo Li
Date: Mon, 10 Mar 2014 09:33:58 +0800
Subject: drm/fb-helper: Do the 'max_conn_count' zero check
Since we cannot make sure the 'max_conn_count' will always be none
zero from the users, and then if max_conn_count equals to zero, the
kcalloc() will return ZERO_SIZE_PTR, which equals to ((void *)16).
So this patch fix this with just doing the 'max_conn_count' zero check
in the front of drm_fb_helper_init().
Signed-off-by: Xiubo Li
CC: Jani Nikula
Signed-off-by: Daniel Vetter
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index e5208e0..89382dc 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -516,6 +516,9 @@ int drm_fb_helper_init(struct drm_device *dev,
struct drm_crtc *crtc;
int i;
+ if (!max_conn_count)
+ return -EINVAL;
+
fb_helper->dev = dev;
INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
--
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