linux-kernel - [PATCH v2] i915: correctly handling failed allocation

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Date:	Wed, 30 Dec 2015 10:59:29 -0500
From:	Insu Yun <wuninsu@...il.com>
To:	daniel.vetter@...el.com, jani.nikula@...ux.intel.com,
	airlied@...ux.ie, intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:	taesoo@...ech.edu, yeongjin.jang@...ech.edu, insu@...ech.edu,
	changwoo@...ech.edu, Insu Yun <wuninsu@...il.com>
Subject: [PATCH v2] i915: correctly handling failed allocation

Since devm_kzalloc can be failed, it needs to be checked
if not, NULL dereference could be happened.

Signed-off-by: Insu Yun <wuninsu@...il.com>
---
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index a5e99ac..aa1f7bc 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -666,6 +666,8 @@ struct drm_panel *vbt_panel_init(struct intel_dsi *intel_dsi, u16 panel_id)
 
 	/* This is cheating a bit with the cleanup. */
 	vbt_panel = devm_kzalloc(dev->dev, sizeof(*vbt_panel), GFP_KERNEL);
+	if (!vbt_panel)
+		return NULL;
 
 	vbt_panel->intel_dsi = intel_dsi;
 	drm_panel_init(&vbt_panel->panel);
-- 
1.9.1

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