From: Sachin Kamat <sachin.kamat@linaro.org>
Date: Fri, 23 Nov 2012 03:41:59 +0000 (+0530)
Subject: drm/exynos: Fix potential NULL pointer dereference
X-Git-Tag: firefly_0821_release~3680^2~1383^2~14^2~4
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=df3d90e5f3f09e5bc940250e2a90a7e15343a4b6;p=firefly-linux-kernel-4.4.55.git

drm/exynos: Fix potential NULL pointer dereference

Pointer was being dereferenced after freeing.

Fixes the following error:
drivers/gpu/drm/exynos/exynos_drm_g2d.c:323 g2d_userptr_put_dma_addr() error:
dereferencing freed memory 'g2d_userptr'

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---

diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index c1054cb2fe06..6ffa0763c078 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -319,8 +319,8 @@ out:
 	g2d_userptr->sgt = NULL;
 
 	kfree(g2d_userptr->pages);
-	kfree(g2d_userptr);
 	g2d_userptr->pages = NULL;
+	kfree(g2d_userptr);
 	g2d_userptr = NULL;
 }