armbian/linux-rockchip
0
0
Fork 0
mirror of https://github.com/armbian/linux-rockchip.git synced 2026-01-06 11:08:10 -08:00
Code Issues Packages Projects Releases Wiki Activity

drm/msm/mdp5: check the return of kzalloc()

Browse Source 
[ Upstream commit 047ae66557 ]

kzalloc() is a memory allocation function which can return NULL when
some internal memory errors happen. So it is better to check it to
prevent potential wrong memory access.

Besides, since mdp5_plane_reset() is void type, so we should better
set `plane-state` to NULL after releasing it.

Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/481055/
Link: https://lore.kernel.org/r/tencent_8E2A1C78140EE1784AB2FF4B2088CC0AB908@qq.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaoke Wang
2022-04-07 10:31:51 +08:00
committed by Greg Kroah-Hartman
parent 8d71edabb0
commit 9581e07b54
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c
View File

@@ -179,7 +179,10 @@ static void mdp5_plane_reset(struct drm_plane *plane)
drm_framebuffer_put(plane->state->fb);
kfree(to_mdp5_plane_state(plane->state));
plane->state = NULL;
mdp5_state = kzalloc(sizeof(*mdp5_state), GFP_KERNEL);
if (!mdp5_state)
return;
/* assign default blend parameters */
mdp5_state->alpha = 255;